/**
* @license
- * lodash 4.6.1 (Custom Build) <https://lodash.com/>
- * Build: `lodash -o ./dist/lodash.js`
- * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
- * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
- * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
- * Available under MIT license <https://lodash.com/license>
+ * Lo-Dash 2.4.1 <http://lodash.com/>
+ * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
+ * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
+ * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ * Available under MIT license <http://lodash.com/license>
*/
;(function() {
- /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+ /** Used as a safe reference for `undefined` in pre ES5 environments */
var undefined;
- /** Used as the semantic version number. */
- var VERSION = '4.6.1';
-
- /** Used as the size to enable large array optimizations. */
- var LARGE_ARRAY_SIZE = 200;
-
- /** Used as the `TypeError` message for "Functions" methods. */
- var FUNC_ERROR_TEXT = 'Expected a function';
-
- /** Used to stand-in for `undefined` hash values. */
- var HASH_UNDEFINED = '__lodash_hash_undefined__';
-
- /** Used as the internal argument placeholder. */
- var PLACEHOLDER = '__lodash_placeholder__';
-
- /** Used to compose bitmasks for wrapper metadata. */
- var BIND_FLAG = 1,
- BIND_KEY_FLAG = 2,
- CURRY_BOUND_FLAG = 4,
- CURRY_FLAG = 8,
- CURRY_RIGHT_FLAG = 16,
- PARTIAL_FLAG = 32,
- PARTIAL_RIGHT_FLAG = 64,
- ARY_FLAG = 128,
- REARG_FLAG = 256,
- FLIP_FLAG = 512;
-
- /** Used to compose bitmasks for comparison styles. */
- var UNORDERED_COMPARE_FLAG = 1,
- PARTIAL_COMPARE_FLAG = 2;
-
- /** Used as default options for `_.truncate`. */
- var DEFAULT_TRUNC_LENGTH = 30,
- DEFAULT_TRUNC_OMISSION = '...';
-
- /** Used to detect hot functions by number of calls within a span of milliseconds. */
- var HOT_COUNT = 150,
- HOT_SPAN = 16;
-
- /** Used to indicate the type of lazy iteratees. */
- var LAZY_FILTER_FLAG = 1,
- LAZY_MAP_FLAG = 2,
- LAZY_WHILE_FLAG = 3;
-
- /** Used as references for various `Number` constants. */
- var INFINITY = 1 / 0,
- MAX_SAFE_INTEGER = 9007199254740991,
- MAX_INTEGER = 1.7976931348623157e+308,
- NAN = 0 / 0;
-
- /** Used as references for the maximum length and index of an array. */
- var MAX_ARRAY_LENGTH = 4294967295,
- MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
- HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
-
- /** `Object#toString` result references. */
- var argsTag = '[object Arguments]',
- arrayTag = '[object Array]',
- boolTag = '[object Boolean]',
- dateTag = '[object Date]',
- errorTag = '[object Error]',
- funcTag = '[object Function]',
- genTag = '[object GeneratorFunction]',
- mapTag = '[object Map]',
- numberTag = '[object Number]',
- objectTag = '[object Object]',
- regexpTag = '[object RegExp]',
- setTag = '[object Set]',
- stringTag = '[object String]',
- symbolTag = '[object Symbol]',
- weakMapTag = '[object WeakMap]',
- weakSetTag = '[object WeakSet]';
-
- var arrayBufferTag = '[object ArrayBuffer]',
- float32Tag = '[object Float32Array]',
- float64Tag = '[object Float64Array]',
- int8Tag = '[object Int8Array]',
- int16Tag = '[object Int16Array]',
- int32Tag = '[object Int32Array]',
- uint8Tag = '[object Uint8Array]',
- uint8ClampedTag = '[object Uint8ClampedArray]',
- uint16Tag = '[object Uint16Array]',
- uint32Tag = '[object Uint32Array]';
-
- /** Used to match empty string literals in compiled template source. */
- var reEmptyStringLeading = /\b__p \+= '';/g,
- reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
- reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
-
- /** Used to match HTML entities and HTML characters. */
- var reEscapedHtml = /&(?:amp|lt|gt|quot|#39|#96);/g,
- reUnescapedHtml = /[&<>"'`]/g,
- reHasEscapedHtml = RegExp(reEscapedHtml.source),
- reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
+ /** Used to pool arrays and objects used internally */
+ var arrayPool = [],
+ objectPool = [];
- /** Used to match template delimiters. */
- var reEscape = /<%-([\s\S]+?)%>/g,
- reEvaluate = /<%([\s\S]+?)%>/g,
- reInterpolate = /<%=([\s\S]+?)%>/g;
+ /** Used to generate unique IDs */
+ var idCounter = 0;
- /** Used to match property names within property paths. */
- var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
- reIsPlainProp = /^\w*$/,
- rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]/g;
+ /** Used internally to indicate various things */
+ var indicatorObject = {};
- /** Used to match `RegExp` [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns). */
- var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
- reHasRegExpChar = RegExp(reRegExpChar.source);
+ /** Used to prefix keys to avoid issues with `__proto__` and properties on `Object.prototype` */
+ var keyPrefix = +new Date + '';
- /** Used to match leading and trailing whitespace. */
- var reTrim = /^\s+|\s+$/g,
- reTrimStart = /^\s+/,
- reTrimEnd = /\s+$/;
+ /** Used as the size when optimizations are enabled for large arrays */
+ var largeArraySize = 75;
- /** Used to match backslashes in property paths. */
- var reEscapeChar = /\\(\\)?/g;
+ /** Used as the max size of the `arrayPool` and `objectPool` */
+ var maxPoolSize = 40;
- /** Used to match [ES template delimiters](http://ecma-international.org/ecma-262/6.0/#sec-template-literal-lexical-components). */
- var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
+ /** Used to detect and test whitespace */
+ var whitespace = (
+ // whitespace
+ ' \t\x0B\f\xA0\ufeff' +
- /** Used to match `RegExp` flags from their coerced string values. */
- var reFlags = /\w*$/;
+ // line terminators
+ '\n\r\u2028\u2029' +
- /** Used to detect hexadecimal string values. */
- var reHasHexPrefix = /^0x/i;
+ // unicode category "Zs" space separators
+ '\u1680\u180e\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u202f\u205f\u3000'
+ );
- /** Used to detect bad signed hexadecimal string values. */
- var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+ /** Used to match empty string literals in compiled template source */
+ var reEmptyStringLeading = /\b__p \+= '';/g,
+ reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
+ reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
- /** Used to detect binary string values. */
- var reIsBinary = /^0b[01]+$/i;
+ /**
+ * Used to match ES6 template delimiters
+ * http://people.mozilla.org/~jorendorff/es6-draft.html#sec-literals-string-literals
+ */
+ var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
- /** Used to detect host constructors (Safari > 5). */
- var reIsHostCtor = /^\[object .+?Constructor\]$/;
+ /** Used to match regexp flags from their coerced string values */
+ var reFlags = /\w*$/;
- /** Used to detect octal string values. */
- var reIsOctal = /^0o[0-7]+$/i;
+ /** Used to detected named functions */
+ var reFuncName = /^\s*function[ \n\r\t]+\w/;
- /** Used to detect unsigned integer values. */
- var reIsUint = /^(?:0|[1-9]\d*)$/;
+ /** Used to match "interpolate" template delimiters */
+ var reInterpolate = /<%=([\s\S]+?)%>/g;
- /** Used to match latin-1 supplementary letters (excluding mathematical operators). */
- var reLatin1 = /[\xc0-\xd6\xd8-\xde\xdf-\xf6\xf8-\xff]/g;
+ /** Used to match leading whitespace and zeros to be removed */
+ var reLeadingSpacesAndZeros = RegExp('^[' + whitespace + ']*0+(?=.$)');
- /** Used to ensure capturing order of template delimiters. */
+ /** Used to ensure capturing order of template delimiters */
var reNoMatch = /($^)/;
- /** Used to match unescaped characters in compiled string literals. */
- var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
-
- /** Used to compose unicode character classes. */
- var rsAstralRange = '\\ud800-\\udfff',
- rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
- rsComboSymbolsRange = '\\u20d0-\\u20f0',
- rsDingbatRange = '\\u2700-\\u27bf',
- rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
- rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
- rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
- rsQuoteRange = '\\u2018\\u2019\\u201c\\u201d',
- rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
- rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
- rsVarRange = '\\ufe0e\\ufe0f',
- rsBreakRange = rsMathOpRange + rsNonCharRange + rsQuoteRange + rsSpaceRange;
-
- /** Used to compose unicode capture groups. */
- var rsAstral = '[' + rsAstralRange + ']',
- rsBreak = '[' + rsBreakRange + ']',
- rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
- rsDigits = '\\d+',
- rsDingbat = '[' + rsDingbatRange + ']',
- rsLower = '[' + rsLowerRange + ']',
- rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
- rsFitz = '\\ud83c[\\udffb-\\udfff]',
- rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
- rsNonAstral = '[^' + rsAstralRange + ']',
- rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
- rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
- rsUpper = '[' + rsUpperRange + ']',
- rsZWJ = '\\u200d';
-
- /** Used to compose unicode regexes. */
- var rsLowerMisc = '(?:' + rsLower + '|' + rsMisc + ')',
- rsUpperMisc = '(?:' + rsUpper + '|' + rsMisc + ')',
- reOptMod = rsModifier + '?',
- rsOptVar = '[' + rsVarRange + ']?',
- rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
- rsSeq = rsOptVar + reOptMod + rsOptJoin,
- rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
- rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
-
- /**
- * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
- * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
- */
- var reComboMark = RegExp(rsCombo, 'g');
-
- /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
- var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
-
- /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
- var reHasComplexSymbol = RegExp('[' + rsZWJ + rsAstralRange + rsComboMarksRange + rsComboSymbolsRange + rsVarRange + ']');
-
- /** Used to match non-compound words composed of alphanumeric characters. */
- var reBasicWord = /[a-zA-Z0-9]+/g;
-
- /** Used to match complex or compound words. */
- var reComplexWord = RegExp([
- rsUpper + '?' + rsLower + '+(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
- rsUpperMisc + '+(?=' + [rsBreak, rsUpper + rsLowerMisc, '$'].join('|') + ')',
- rsUpper + '?' + rsLowerMisc + '+',
- rsUpper + '+',
- rsDigits,
- rsEmoji
- ].join('|'), 'g');
+ /** Used to detect functions containing a `this` reference */
+ var reThis = /\bthis\b/;
- /** Used to detect strings that need a more robust regexp to match words. */
- var reHasComplexWord = /[a-z][A-Z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
+ /** Used to match unescaped characters in compiled string literals */
+ var reUnescapedString = /['\n\r\t\u2028\u2029\\]/g;
- /** Used to assign default `context` object properties. */
+ /** Used to assign default `context` object properties */
var contextProps = [
- 'Array', 'Buffer', 'Date', 'Error', 'Float32Array', 'Float64Array',
- 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
- 'Reflect', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',
- 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap', '_',
- 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
+ 'Array', 'Boolean', 'Date', 'Error', 'Function', 'Math', 'Number', 'Object',
+ 'RegExp', 'String', '_', 'attachEvent', 'clearTimeout', 'isFinite', 'isNaN',
+ 'parseInt', 'setTimeout'
];
- /** Used to make template sourceURLs easier to identify. */
- var templateCounter = -1;
-
- /** Used to identify `toStringTag` values of typed arrays. */
- var typedArrayTags = {};
- typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
- typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
- typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
- typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
- typedArrayTags[uint32Tag] = true;
- typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
- typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
- typedArrayTags[dateTag] = typedArrayTags[errorTag] =
- typedArrayTags[funcTag] = typedArrayTags[mapTag] =
- typedArrayTags[numberTag] = typedArrayTags[objectTag] =
- typedArrayTags[regexpTag] = typedArrayTags[setTag] =
- typedArrayTags[stringTag] = typedArrayTags[weakMapTag] = false;
-
- /** Used to identify `toStringTag` values supported by `_.clone`. */
- var cloneableTags = {};
- cloneableTags[argsTag] = cloneableTags[arrayTag] =
- cloneableTags[arrayBufferTag] = cloneableTags[boolTag] =
- cloneableTags[dateTag] = cloneableTags[float32Tag] =
- cloneableTags[float64Tag] = cloneableTags[int8Tag] =
- cloneableTags[int16Tag] = cloneableTags[int32Tag] =
- cloneableTags[mapTag] = cloneableTags[numberTag] =
- cloneableTags[objectTag] = cloneableTags[regexpTag] =
- cloneableTags[setTag] = cloneableTags[stringTag] =
- cloneableTags[symbolTag] = cloneableTags[uint8Tag] =
- cloneableTags[uint8ClampedTag] = cloneableTags[uint16Tag] =
- cloneableTags[uint32Tag] = true;
- cloneableTags[errorTag] = cloneableTags[funcTag] =
- cloneableTags[weakMapTag] = false;
-
- /** Used to map latin-1 supplementary letters to basic latin letters. */
- var deburredLetters = {
- '\xc0': 'A', '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
- '\xe0': 'a', '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
- '\xc7': 'C', '\xe7': 'c',
- '\xd0': 'D', '\xf0': 'd',
- '\xc8': 'E', '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
- '\xe8': 'e', '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
- '\xcC': 'I', '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
- '\xeC': 'i', '\xed': 'i', '\xee': 'i', '\xef': 'i',
- '\xd1': 'N', '\xf1': 'n',
- '\xd2': 'O', '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
- '\xf2': 'o', '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
- '\xd9': 'U', '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
- '\xf9': 'u', '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
- '\xdd': 'Y', '\xfd': 'y', '\xff': 'y',
- '\xc6': 'Ae', '\xe6': 'ae',
- '\xde': 'Th', '\xfe': 'th',
- '\xdf': 'ss'
+ /** Used to fix the JScript [[DontEnum]] bug */
+ var shadowedProps = [
+ 'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable',
+ 'toLocaleString', 'toString', 'valueOf'
+ ];
+
+ /** Used to make template sourceURLs easier to identify */
+ var templateCounter = 0;
+
+ /** `Object#toString` result shortcuts */
+ var argsClass = '[object Arguments]',
+ arrayClass = '[object Array]',
+ boolClass = '[object Boolean]',
+ dateClass = '[object Date]',
+ errorClass = '[object Error]',
+ funcClass = '[object Function]',
+ numberClass = '[object Number]',
+ objectClass = '[object Object]',
+ regexpClass = '[object RegExp]',
+ stringClass = '[object String]';
+
+ /** Used to identify object classifications that `_.clone` supports */
+ var cloneableClasses = {};
+ cloneableClasses[funcClass] = false;
+ cloneableClasses[argsClass] = cloneableClasses[arrayClass] =
+ cloneableClasses[boolClass] = cloneableClasses[dateClass] =
+ cloneableClasses[numberClass] = cloneableClasses[objectClass] =
+ cloneableClasses[regexpClass] = cloneableClasses[stringClass] = true;
+
+ /** Used as an internal `_.debounce` options object */
+ var debounceOptions = {
+ 'leading': false,
+ 'maxWait': 0,
+ 'trailing': false
};
- /** Used to map characters to HTML entities. */
- var htmlEscapes = {
- '&': '&',
- '<': '<',
- '>': '>',
- '"': '"',
- "'": ''',
- '`': '`'
+ /** Used as the property descriptor for `__bindData__` */
+ var descriptor = {
+ 'configurable': false,
+ 'enumerable': false,
+ 'value': null,
+ 'writable': false
};
- /** Used to map HTML entities to characters. */
- var htmlUnescapes = {
- '&': '&',
- '<': '<',
- '>': '>',
- '"': '"',
- ''': "'",
- '`': '`'
+ /** Used as the data object for `iteratorTemplate` */
+ var iteratorData = {
+ 'args': '',
+ 'array': null,
+ 'bottom': '',
+ 'firstArg': '',
+ 'init': '',
+ 'keys': null,
+ 'loop': '',
+ 'shadowedProps': null,
+ 'support': null,
+ 'top': '',
+ 'useHas': false
};
- /** Used to determine if values are of the language type `Object`. */
+ /** Used to determine if values are of the language type Object */
var objectTypes = {
+ 'boolean': false,
'function': true,
- 'object': true
+ 'object': true,
+ 'number': false,
+ 'string': false,
+ 'undefined': false
};
- /** Used to escape characters for inclusion in compiled string literals. */
+ /** Used to escape characters for inclusion in compiled string literals */
var stringEscapes = {
'\\': '\\',
"'": "'",
'\n': 'n',
'\r': 'r',
+ '\t': 't',
'\u2028': 'u2028',
'\u2029': 'u2029'
};
- /** Built-in method references without a dependency on `root`. */
- var freeParseFloat = parseFloat,
- freeParseInt = parseInt;
-
- /** Detect free variable `exports`. */
- var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
- ? exports
- : undefined;
-
- /** Detect free variable `module`. */
- var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
- ? module
- : undefined;
+ /** Used as a reference to the global object */
+ var root = (objectTypes[typeof window] && window) || this;
- /** Detect the popular CommonJS extension `module.exports`. */
- var moduleExports = (freeModule && freeModule.exports === freeExports)
- ? freeExports
- : undefined;
-
- /** Detect free variable `global` from Node.js. */
- var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global);
-
- /** Detect free variable `self`. */
- var freeSelf = checkGlobal(objectTypes[typeof self] && self);
-
- /** Detect free variable `window`. */
- var freeWindow = checkGlobal(objectTypes[typeof window] && window);
-
- /** Detect `this` as the global object. */
- var thisGlobal = checkGlobal(objectTypes[typeof this] && this);
-
- /**
- * Used as a reference to the global object.
- *
- * The `this` value is used if it's the global object to avoid Greasemonkey's
- * restricted `window` object, otherwise the `window` object is used.
- */
- var root = freeGlobal ||
- ((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) ||
- freeSelf || thisGlobal || Function('return this')();
+ /** Detect free variable `exports` */
+ var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;
- /*--------------------------------------------------------------------------*/
+ /** Detect free variable `module` */
+ var freeModule = objectTypes[typeof module] && module && !module.nodeType && module;
- /**
- * Adds the key-value `pair` to `map`.
- *
- * @private
- * @param {Object} map The map to modify.
- * @param {Array} pair The key-value pair to add.
- * @returns {Object} Returns `map`.
- */
- function addMapEntry(map, pair) {
- // Don't return `Map#set` because it doesn't return the map instance in IE 11.
- map.set(pair[0], pair[1]);
- return map;
- }
+ /** Detect the popular CommonJS extension `module.exports` */
+ var moduleExports = freeModule && freeModule.exports === freeExports && freeExports;
- /**
- * Adds `value` to `set`.
- *
- * @private
- * @param {Object} set The set to modify.
- * @param {*} value The value to add.
- * @returns {Object} Returns `set`.
- */
- function addSetEntry(set, value) {
- set.add(value);
- return set;
+ /** Detect free variable `global` from Node.js or Browserified code and use it as `root` */
+ var freeGlobal = objectTypes[typeof global] && global;
+ if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal)) {
+ root = freeGlobal;
}
- /**
- * A faster alternative to `Function#apply`, this function invokes `func`
- * with the `this` binding of `thisArg` and the arguments of `args`.
- *
- * @private
- * @param {Function} func The function to invoke.
- * @param {*} thisArg The `this` binding of `func`.
- * @param {...*} args The arguments to invoke `func` with.
- * @returns {*} Returns the result of `func`.
- */
- function apply(func, thisArg, args) {
- var length = args.length;
- switch (length) {
- case 0: return func.call(thisArg);
- case 1: return func.call(thisArg, args[0]);
- case 2: return func.call(thisArg, args[0], args[1]);
- case 3: return func.call(thisArg, args[0], args[1], args[2]);
- }
- return func.apply(thisArg, args);
- }
+ /*--------------------------------------------------------------------------*/
/**
- * A specialized version of `baseAggregator` for arrays.
+ * The base implementation of `_.indexOf` without support for binary searches
+ * or `fromIndex` constraints.
*
* @private
- * @param {Array} array The array to iterate over.
- * @param {Function} setter The function to set `accumulator` values.
- * @param {Function} iteratee The iteratee to transform keys.
- * @param {Object} accumulator The initial aggregated object.
- * @returns {Function} Returns `accumulator`.
+ * @param {Array} array The array to search.
+ * @param {*} value The value to search for.
+ * @param {number} [fromIndex=0] The index to search from.
+ * @returns {number} Returns the index of the matched value or `-1`.
*/
- function arrayAggregator(array, setter, iteratee, accumulator) {
- var index = -1,
- length = array.length;
+ function baseIndexOf(array, value, fromIndex) {
+ var index = (fromIndex || 0) - 1,
+ length = array ? array.length : 0;
while (++index < length) {
- var value = array[index];
- setter(accumulator, value, iteratee(value), array);
+ if (array[index] === value) {
+ return index;
+ }
}
- return accumulator;
+ return -1;
}
/**
- * Creates a new array concatenating `array` with `other`.
+ * An implementation of `_.contains` for cache objects that mimics the return
+ * signature of `_.indexOf` by returning `0` if the value is found, else `-1`.
*
* @private
- * @param {Array} array The first array to concatenate.
- * @param {Array} other The second array to concatenate.
- * @returns {Array} Returns the new concatenated array.
+ * @param {Object} cache The cache object to inspect.
+ * @param {*} value The value to search for.
+ * @returns {number} Returns `0` if `value` is found, else `-1`.
*/
- function arrayConcat(array, other) {
- var index = -1,
- length = array.length,
- othIndex = -1,
- othLength = other.length,
- result = Array(length + othLength);
+ function cacheIndexOf(cache, value) {
+ var type = typeof value;
+ cache = cache.cache;
- while (++index < length) {
- result[index] = array[index];
+ if (type == 'boolean' || value == null) {
+ return cache[value] ? 0 : -1;
}
- while (++othIndex < othLength) {
- result[index++] = other[othIndex];
+ if (type != 'number' && type != 'string') {
+ type = 'object';
}
- return result;
+ var key = type == 'number' ? value : keyPrefix + value;
+ cache = (cache = cache[type]) && cache[key];
+
+ return type == 'object'
+ ? (cache && baseIndexOf(cache, value) > -1 ? 0 : -1)
+ : (cache ? 0 : -1);
}
/**
- * A specialized version of `_.forEach` for arrays without support for
- * iteratee shorthands.
+ * Adds a given value to the corresponding cache object.
*
* @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns `array`.
+ * @param {*} value The value to add to the cache.
*/
- function arrayEach(array, iteratee) {
- var index = -1,
- length = array.length;
+ function cachePush(value) {
+ var cache = this.cache,
+ type = typeof value;
- while (++index < length) {
- if (iteratee(array[index], index, array) === false) {
- break;
+ if (type == 'boolean' || value == null) {
+ cache[value] = true;
+ } else {
+ if (type != 'number' && type != 'string') {
+ type = 'object';
+ }
+ var key = type == 'number' ? value : keyPrefix + value,
+ typeCache = cache[type] || (cache[type] = {});
+
+ if (type == 'object') {
+ (typeCache[key] || (typeCache[key] = [])).push(value);
+ } else {
+ typeCache[key] = true;
}
}
- return array;
}
/**
- * A specialized version of `_.forEachRight` for arrays without support for
- * iteratee shorthands.
+ * Used by `_.max` and `_.min` as the default callback when a given
+ * collection is a string value.
*
* @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns `array`.
+ * @param {string} value The character to inspect.
+ * @returns {number} Returns the code unit of given character.
*/
- function arrayEachRight(array, iteratee) {
- var length = array.length;
-
- while (length--) {
- if (iteratee(array[length], length, array) === false) {
- break;
- }
- }
- return array;
+ function charAtCallback(value) {
+ return value.charCodeAt(0);
}
/**
- * A specialized version of `_.every` for arrays without support for
- * iteratee shorthands.
+ * Used by `sortBy` to compare transformed `collection` elements, stable sorting
+ * them in ascending order.
*
* @private
- * @param {Array} array The array to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if all elements pass the predicate check, else `false`.
+ * @param {Object} a The object to compare to `b`.
+ * @param {Object} b The object to compare to `a`.
+ * @returns {number} Returns the sort order indicator of `1` or `-1`.
*/
- function arrayEvery(array, predicate) {
- var index = -1,
- length = array.length;
+ function compareAscending(a, b) {
+ var ac = a.criteria,
+ bc = b.criteria,
+ index = -1,
+ length = ac.length;
while (++index < length) {
- if (!predicate(array[index], index, array)) {
- return false;
+ var value = ac[index],
+ other = bc[index];
+
+ if (value !== other) {
+ if (value > other || typeof value == 'undefined') {
+ return 1;
+ }
+ if (value < other || typeof other == 'undefined') {
+ return -1;
+ }
}
}
- return true;
+ // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
+ // that causes it, under certain circumstances, to return the same value for
+ // `a` and `b`. See https://github.com/jashkenas/underscore/pull/1247
+ //
+ // This also ensures a stable sort in V8 and other engines.
+ // See http://code.google.com/p/v8/issues/detail?id=90
+ return a.index - b.index;
}
/**
- * A specialized version of `_.filter` for arrays without support for
- * iteratee shorthands.
+ * Creates a cache object to optimize linear searches of large arrays.
*
* @private
- * @param {Array} array The array to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
+ * @param {Array} [array=[]] The array to search.
+ * @returns {null|Object} Returns the cache object or `null` if caching should not be used.
*/
- function arrayFilter(array, predicate) {
+ function createCache(array) {
var index = -1,
length = array.length,
- resIndex = 0,
- result = [];
+ first = array[0],
+ mid = array[(length / 2) | 0],
+ last = array[length - 1];
+
+ if (first && typeof first == 'object' &&
+ mid && typeof mid == 'object' && last && typeof last == 'object') {
+ return false;
+ }
+ var cache = getObject();
+ cache['false'] = cache['null'] = cache['true'] = cache['undefined'] = false;
+
+ var result = getObject();
+ result.array = array;
+ result.cache = cache;
+ result.push = cachePush;
while (++index < length) {
- var value = array[index];
- if (predicate(value, index, array)) {
- result[resIndex++] = value;
- }
+ result.push(array[index]);
}
return result;
}
/**
- * A specialized version of `_.includes` for arrays without support for
- * specifying an index to search from.
+ * Used by `template` to escape characters for inclusion in compiled
+ * string literals.
*
* @private
- * @param {Array} array The array to search.
- * @param {*} target The value to search for.
- * @returns {boolean} Returns `true` if `target` is found, else `false`.
+ * @param {string} match The matched character to escape.
+ * @returns {string} Returns the escaped character.
*/
- function arrayIncludes(array, value) {
- return !!array.length && baseIndexOf(array, value, 0) > -1;
+ function escapeStringChar(match) {
+ return '\\' + stringEscapes[match];
}
/**
- * This function is like `arrayIncludes` except that it accepts a comparator.
+ * Gets an array from the array pool or creates a new one if the pool is empty.
*
* @private
- * @param {Array} array The array to search.
- * @param {*} target The value to search for.
- * @param {Function} comparator The comparator invoked per element.
- * @returns {boolean} Returns `true` if `target` is found, else `false`.
+ * @returns {Array} The array from the pool.
*/
- function arrayIncludesWith(array, value, comparator) {
- var index = -1,
- length = array.length;
-
- while (++index < length) {
- if (comparator(value, array[index])) {
- return true;
- }
- }
- return false;
+ function getArray() {
+ return arrayPool.pop() || [];
}
/**
- * A specialized version of `_.map` for arrays without support for iteratee
- * shorthands.
+ * Gets an object from the object pool or creates a new one if the pool is empty.
*
* @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns the new mapped array.
+ * @returns {Object} The object from the pool.
*/
- function arrayMap(array, iteratee) {
- var index = -1,
- length = array.length,
- result = Array(length);
-
- while (++index < length) {
- result[index] = iteratee(array[index], index, array);
- }
- return result;
+ function getObject() {
+ return objectPool.pop() || {
+ 'array': null,
+ 'cache': null,
+ 'criteria': null,
+ 'false': false,
+ 'index': 0,
+ 'null': false,
+ 'number': null,
+ 'object': null,
+ 'push': null,
+ 'string': null,
+ 'true': false,
+ 'undefined': false,
+ 'value': null
+ };
}
/**
- * Appends the elements of `values` to `array`.
+ * Checks if `value` is a DOM node in IE < 9.
*
* @private
- * @param {Array} array The array to modify.
- * @param {Array} values The values to append.
- * @returns {Array} Returns `array`.
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is a DOM node, else `false`.
*/
- function arrayPush(array, values) {
- var index = -1,
- length = values.length,
- offset = array.length;
-
- while (++index < length) {
- array[offset + index] = values[index];
- }
- return array;
+ function isNode(value) {
+ // IE < 9 presents DOM nodes as `Object` objects except they have `toString`
+ // methods that are `typeof` "string" and still can coerce nodes to strings
+ return typeof value.toString != 'function' && typeof (value + '') == 'string';
}
/**
- * A specialized version of `_.reduce` for arrays without support for
- * iteratee shorthands.
+ * Releases the given array back to the array pool.
*
* @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @param {boolean} [initAccum] Specify using the first element of `array` as the initial value.
- * @returns {*} Returns the accumulated value.
+ * @param {Array} [array] The array to release.
*/
- function arrayReduce(array, iteratee, accumulator, initAccum) {
- var index = -1,
- length = array.length;
-
- if (initAccum && length) {
- accumulator = array[++index];
- }
- while (++index < length) {
- accumulator = iteratee(accumulator, array[index], index, array);
+ function releaseArray(array) {
+ array.length = 0;
+ if (arrayPool.length < maxPoolSize) {
+ arrayPool.push(array);
}
- return accumulator;
}
/**
- * A specialized version of `_.reduceRight` for arrays without support for
- * iteratee shorthands.
+ * Releases the given object back to the object pool.
*
* @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @param {boolean} [initAccum] Specify using the last element of `array` as the initial value.
- * @returns {*} Returns the accumulated value.
+ * @param {Object} [object] The object to release.
*/
- function arrayReduceRight(array, iteratee, accumulator, initAccum) {
- var length = array.length;
- if (initAccum && length) {
- accumulator = array[--length];
+ function releaseObject(object) {
+ var cache = object.cache;
+ if (cache) {
+ releaseObject(cache);
}
- while (length--) {
- accumulator = iteratee(accumulator, array[length], length, array);
+ object.array = object.cache = object.criteria = object.object = object.number = object.string = object.value = null;
+ if (objectPool.length < maxPoolSize) {
+ objectPool.push(object);
}
- return accumulator;
}
/**
- * A specialized version of `_.some` for arrays without support for iteratee
- * shorthands.
+ * Slices the `collection` from the `start` index up to, but not including,
+ * the `end` index.
*
- * @private
- * @param {Array} array The array to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if any element passes the predicate check, else `false`.
- */
- function arraySome(array, predicate) {
- var index = -1,
- length = array.length;
-
- while (++index < length) {
- if (predicate(array[index], index, array)) {
- return true;
- }
- }
- return false;
- }
-
- /**
- * The base implementation of methods like `_.max` and `_.min` which accepts a
- * `comparator` to determine the extremum value.
+ * Note: This function is used instead of `Array#slice` to support node lists
+ * in IE < 9 and to ensure dense arrays are returned.
*
* @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The iteratee invoked per iteration.
- * @param {Function} comparator The comparator used to compare values.
- * @returns {*} Returns the extremum value.
+ * @param {Array|Object|string} collection The collection to slice.
+ * @param {number} start The start index.
+ * @param {number} end The end index.
+ * @returns {Array} Returns the new array.
*/
- function baseExtremum(array, iteratee, comparator) {
+ function slice(array, start, end) {
+ start || (start = 0);
+ if (typeof end == 'undefined') {
+ end = array ? array.length : 0;
+ }
var index = -1,
- length = array.length;
+ length = end - start || 0,
+ result = Array(length < 0 ? 0 : length);
while (++index < length) {
- var value = array[index],
- current = iteratee(value);
-
- if (current != null && (computed === undefined
- ? current === current
- : comparator(current, computed)
- )) {
- var computed = current,
- result = value;
- }
+ result[index] = array[start + index];
}
return result;
}
- /**
- * The base implementation of methods like `_.find` and `_.findKey`, without
- * support for iteratee shorthands, which iterates over `collection` using
- * `eachFunc`.
- *
- * @private
- * @param {Array|Object} collection The collection to search.
- * @param {Function} predicate The function invoked per iteration.
- * @param {Function} eachFunc The function to iterate over `collection`.
- * @param {boolean} [retKey] Specify returning the key of the found element instead of the element itself.
- * @returns {*} Returns the found element or its key, else `undefined`.
- */
- function baseFind(collection, predicate, eachFunc, retKey) {
- var result;
- eachFunc(collection, function(value, key, collection) {
- if (predicate(value, key, collection)) {
- result = retKey ? key : value;
- return false;
- }
- });
- return result;
- }
+ /*--------------------------------------------------------------------------*/
/**
- * The base implementation of `_.findIndex` and `_.findLastIndex` without
- * support for iteratee shorthands.
+ * Create a new `lodash` function using the given context object.
*
- * @private
- * @param {Array} array The array to search.
- * @param {Function} predicate The function invoked per iteration.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {number} Returns the index of the matched value, else `-1`.
+ * @static
+ * @memberOf _
+ * @category Utilities
+ * @param {Object} [context=root] The context object.
+ * @returns {Function} Returns the `lodash` function.
*/
- function baseFindIndex(array, predicate, fromRight) {
- var length = array.length,
- index = fromRight ? length : -1;
+ function runInContext(context) {
+ // Avoid issues with some ES3 environments that attempt to use values, named
+ // after built-in constructors like `Object`, for the creation of literals.
+ // ES5 clears this up by stating that literals must use built-in constructors.
+ // See http://es5.github.io/#x11.1.5.
+ context = context ? _.defaults(root.Object(), context, _.pick(root, contextProps)) : root;
+
+ /** Native constructor references */
+ var Array = context.Array,
+ Boolean = context.Boolean,
+ Date = context.Date,
+ Error = context.Error,
+ Function = context.Function,
+ Math = context.Math,
+ Number = context.Number,
+ Object = context.Object,
+ RegExp = context.RegExp,
+ String = context.String,
+ TypeError = context.TypeError;
- while ((fromRight ? index-- : ++index < length)) {
- if (predicate(array[index], index, array)) {
- return index;
- }
- }
- return -1;
- }
+ /**
+ * Used for `Array` method references.
+ *
+ * Normally `Array.prototype` would suffice, however, using an array literal
+ * avoids issues in Narwhal.
+ */
+ var arrayRef = [];
- /**
- * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
- *
- * @private
- * @param {Array} array The array to search.
- * @param {*} value The value to search for.
- * @param {number} fromIndex The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function baseIndexOf(array, value, fromIndex) {
- if (value !== value) {
- return indexOfNaN(array, fromIndex);
- }
- var index = fromIndex - 1,
- length = array.length;
+ /** Used for native method references */
+ var errorProto = Error.prototype,
+ objectProto = Object.prototype,
+ stringProto = String.prototype;
- while (++index < length) {
- if (array[index] === value) {
- return index;
- }
- }
- return -1;
- }
+ /** Used to restore the original `_` reference in `noConflict` */
+ var oldDash = context._;
- /**
- * This function is like `baseIndexOf` except that it accepts a comparator.
- *
- * @private
- * @param {Array} array The array to search.
- * @param {*} value The value to search for.
- * @param {number} fromIndex The index to search from.
- * @param {Function} comparator The comparator invoked per element.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function baseIndexOfWith(array, value, fromIndex, comparator) {
- var index = fromIndex - 1,
- length = array.length;
+ /** Used to resolve the internal [[Class]] of values */
+ var toString = objectProto.toString;
- while (++index < length) {
- if (comparator(array[index], value)) {
- return index;
- }
- }
- return -1;
- }
+ /** Used to detect if a method is native */
+ var reNative = RegExp('^' +
+ String(toString)
+ .replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
+ .replace(/toString| for [^\]]+/g, '.*?') + '$'
+ );
- /**
- * The base implementation of `_.reduce` and `_.reduceRight`, without support
- * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {*} accumulator The initial value.
- * @param {boolean} initAccum Specify using the first or last element of `collection` as the initial value.
- * @param {Function} eachFunc The function to iterate over `collection`.
- * @returns {*} Returns the accumulated value.
- */
- function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
- eachFunc(collection, function(value, index, collection) {
- accumulator = initAccum
- ? (initAccum = false, value)
- : iteratee(accumulator, value, index, collection);
- });
- return accumulator;
- }
+ /** Native method shortcuts */
+ var ceil = Math.ceil,
+ clearTimeout = context.clearTimeout,
+ floor = Math.floor,
+ fnToString = Function.prototype.toString,
+ getPrototypeOf = isNative(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf,
+ hasOwnProperty = objectProto.hasOwnProperty,
+ push = arrayRef.push,
+ propertyIsEnumerable = objectProto.propertyIsEnumerable,
+ setTimeout = context.setTimeout,
+ splice = arrayRef.splice,
+ unshift = arrayRef.unshift;
- /**
- * The base implementation of `_.sortBy` which uses `comparer` to define the
- * sort order of `array` and replaces criteria objects with their corresponding
- * values.
- *
- * @private
- * @param {Array} array The array to sort.
- * @param {Function} comparer The function to define sort order.
- * @returns {Array} Returns `array`.
- */
- function baseSortBy(array, comparer) {
- var length = array.length;
+ /** Used to set meta data on functions */
+ var defineProperty = (function() {
+ // IE 8 only accepts DOM elements
+ try {
+ var o = {},
+ func = isNative(func = Object.defineProperty) && func,
+ result = func(o, o, o) && func;
+ } catch(e) { }
+ return result;
+ }());
- array.sort(comparer);
- while (length--) {
- array[length] = array[length].value;
- }
- return array;
- }
+ /* Native method shortcuts for methods with the same name as other `lodash` methods */
+ var nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate,
+ nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray,
+ nativeIsFinite = context.isFinite,
+ nativeIsNaN = context.isNaN,
+ nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys,
+ nativeMax = Math.max,
+ nativeMin = Math.min,
+ nativeParseInt = context.parseInt,
+ nativeRandom = Math.random;
+
+ /** Used to lookup a built-in constructor by [[Class]] */
+ var ctorByClass = {};
+ ctorByClass[arrayClass] = Array;
+ ctorByClass[boolClass] = Boolean;
+ ctorByClass[dateClass] = Date;
+ ctorByClass[funcClass] = Function;
+ ctorByClass[objectClass] = Object;
+ ctorByClass[numberClass] = Number;
+ ctorByClass[regexpClass] = RegExp;
+ ctorByClass[stringClass] = String;
+
+ /** Used to avoid iterating non-enumerable properties in IE < 9 */
+ var nonEnumProps = {};
+ nonEnumProps[arrayClass] = nonEnumProps[dateClass] = nonEnumProps[numberClass] = { 'constructor': true, 'toLocaleString': true, 'toString': true, 'valueOf': true };
+ nonEnumProps[boolClass] = nonEnumProps[stringClass] = { 'constructor': true, 'toString': true, 'valueOf': true };
+ nonEnumProps[errorClass] = nonEnumProps[funcClass] = nonEnumProps[regexpClass] = { 'constructor': true, 'toString': true };
+ nonEnumProps[objectClass] = { 'constructor': true };
+
+ (function() {
+ var length = shadowedProps.length;
+ while (length--) {
+ var key = shadowedProps[length];
+ for (var className in nonEnumProps) {
+ if (hasOwnProperty.call(nonEnumProps, className) && !hasOwnProperty.call(nonEnumProps[className], key)) {
+ nonEnumProps[className][key] = false;
+ }
+ }
+ }
+ }());
- /**
- * The base implementation of `_.sum` without support for iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {number} Returns the sum.
- */
- function baseSum(array, iteratee) {
- var result,
- index = -1,
- length = array.length;
+ /*--------------------------------------------------------------------------*/
- while (++index < length) {
- var current = iteratee(array[index]);
- if (current !== undefined) {
- result = result === undefined ? current : (result + current);
- }
+ /**
+ * Creates a `lodash` object which wraps the given value to enable intuitive
+ * method chaining.
+ *
+ * In addition to Lo-Dash methods, wrappers also have the following `Array` methods:
+ * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`,
+ * and `unshift`
+ *
+ * Chaining is supported in custom builds as long as the `value` method is
+ * implicitly or explicitly included in the build.
+ *
+ * The chainable wrapper functions are:
+ * `after`, `assign`, `bind`, `bindAll`, `bindKey`, `chain`, `compact`,
+ * `compose`, `concat`, `countBy`, `create`, `createCallback`, `curry`,
+ * `debounce`, `defaults`, `defer`, `delay`, `difference`, `filter`, `flatten`,
+ * `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`,
+ * `functions`, `groupBy`, `indexBy`, `initial`, `intersection`, `invert`,
+ * `invoke`, `keys`, `map`, `max`, `memoize`, `merge`, `min`, `object`, `omit`,
+ * `once`, `pairs`, `partial`, `partialRight`, `pick`, `pluck`, `pull`, `push`,
+ * `range`, `reject`, `remove`, `rest`, `reverse`, `shuffle`, `slice`, `sort`,
+ * `sortBy`, `splice`, `tap`, `throttle`, `times`, `toArray`, `transform`,
+ * `union`, `uniq`, `unshift`, `unzip`, `values`, `where`, `without`, `wrap`,
+ * and `zip`
+ *
+ * The non-chainable wrapper functions are:
+ * `clone`, `cloneDeep`, `contains`, `escape`, `every`, `find`, `findIndex`,
+ * `findKey`, `findLast`, `findLastIndex`, `findLastKey`, `has`, `identity`,
+ * `indexOf`, `isArguments`, `isArray`, `isBoolean`, `isDate`, `isElement`,
+ * `isEmpty`, `isEqual`, `isFinite`, `isFunction`, `isNaN`, `isNull`, `isNumber`,
+ * `isObject`, `isPlainObject`, `isRegExp`, `isString`, `isUndefined`, `join`,
+ * `lastIndexOf`, `mixin`, `noConflict`, `parseInt`, `pop`, `random`, `reduce`,
+ * `reduceRight`, `result`, `shift`, `size`, `some`, `sortedIndex`, `runInContext`,
+ * `template`, `unescape`, `uniqueId`, and `value`
+ *
+ * The wrapper functions `first` and `last` return wrapped values when `n` is
+ * provided, otherwise they return unwrapped values.
+ *
+ * Explicit chaining can be enabled by using the `_.chain` method.
+ *
+ * @name _
+ * @constructor
+ * @category Chaining
+ * @param {*} value The value to wrap in a `lodash` instance.
+ * @returns {Object} Returns a `lodash` instance.
+ * @example
+ *
+ * var wrapped = _([1, 2, 3]);
+ *
+ * // returns an unwrapped value
+ * wrapped.reduce(function(sum, num) {
+ * return sum + num;
+ * });
+ * // => 6
+ *
+ * // returns a wrapped value
+ * var squares = wrapped.map(function(num) {
+ * return num * num;
+ * });
+ *
+ * _.isArray(squares);
+ * // => false
+ *
+ * _.isArray(squares.value());
+ * // => true
+ */
+ function lodash(value) {
+ // don't wrap if already wrapped, even if wrapped by a different `lodash` constructor
+ return (value && typeof value == 'object' && !isArray(value) && hasOwnProperty.call(value, '__wrapped__'))
+ ? value
+ : new lodashWrapper(value);
}
- return result;
- }
-
- /**
- * The base implementation of `_.times` without support for iteratee shorthands
- * or max array length checks.
- *
- * @private
- * @param {number} n The number of times to invoke `iteratee`.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns the array of results.
- */
- function baseTimes(n, iteratee) {
- var index = -1,
- result = Array(n);
- while (++index < n) {
- result[index] = iteratee(index);
+ /**
+ * A fast path for creating `lodash` wrapper objects.
+ *
+ * @private
+ * @param {*} value The value to wrap in a `lodash` instance.
+ * @param {boolean} chainAll A flag to enable chaining for all methods
+ * @returns {Object} Returns a `lodash` instance.
+ */
+ function lodashWrapper(value, chainAll) {
+ this.__chain__ = !!chainAll;
+ this.__wrapped__ = value;
}
- return result;
- }
-
- /**
- * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
- * of key-value pairs for `object` corresponding to the property names of `props`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array} props The property names to get values for.
- * @returns {Object} Returns the new array of key-value pairs.
- */
- function baseToPairs(object, props) {
- return arrayMap(props, function(key) {
- return [key, object[key]];
- });
- }
-
- /**
- * The base implementation of `_.unary` without support for storing wrapper metadata.
- *
- * @private
- * @param {Function} func The function to cap arguments for.
- * @returns {Function} Returns the new function.
- */
- function baseUnary(func) {
- return function(value) {
- return func(value);
- };
- }
-
- /**
- * The base implementation of `_.values` and `_.valuesIn` which creates an
- * array of `object` property values corresponding to the property names
- * of `props`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array} props The property names to get values for.
- * @returns {Object} Returns the array of property values.
- */
- function baseValues(object, props) {
- return arrayMap(props, function(key) {
- return object[key];
- });
- }
-
- /**
- * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
- * that is not found in the character symbols.
- *
- * @private
- * @param {Array} strSymbols The string symbols to inspect.
- * @param {Array} chrSymbols The character symbols to find.
- * @returns {number} Returns the index of the first unmatched string symbol.
- */
- function charsStartIndex(strSymbols, chrSymbols) {
- var index = -1,
- length = strSymbols.length;
-
- while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
- return index;
- }
-
- /**
- * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
- * that is not found in the character symbols.
- *
- * @private
- * @param {Array} strSymbols The string symbols to inspect.
- * @param {Array} chrSymbols The character symbols to find.
- * @returns {number} Returns the index of the last unmatched string symbol.
- */
- function charsEndIndex(strSymbols, chrSymbols) {
- var index = strSymbols.length;
-
- while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
- return index;
- }
-
- /**
- * Checks if `value` is a global object.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {null|Object} Returns `value` if it's a global object, else `null`.
- */
- function checkGlobal(value) {
- return (value && value.Object === Object) ? value : null;
- }
-
- /**
- * Compares values to sort them in ascending order.
- *
- * @private
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {number} Returns the sort order indicator for `value`.
- */
- function compareAscending(value, other) {
- if (value !== other) {
- var valIsNull = value === null,
- valIsUndef = value === undefined,
- valIsReflexive = value === value;
-
- var othIsNull = other === null,
- othIsUndef = other === undefined,
- othIsReflexive = other === other;
-
- if ((value > other && !othIsNull) || !valIsReflexive ||
- (valIsNull && !othIsUndef && othIsReflexive) ||
- (valIsUndef && othIsReflexive)) {
- return 1;
- }
- if ((value < other && !valIsNull) || !othIsReflexive ||
- (othIsNull && !valIsUndef && valIsReflexive) ||
- (othIsUndef && valIsReflexive)) {
- return -1;
- }
- }
- return 0;
- }
-
- /**
- * Used by `_.orderBy` to compare multiple properties of a value to another
- * and stable sort them.
- *
- * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
- * specify an order of "desc" for descending or "asc" for ascending sort order
- * of corresponding values.
- *
- * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @param {boolean[]|string[]} orders The order to sort by for each property.
- * @returns {number} Returns the sort order indicator for `object`.
- */
- function compareMultiple(object, other, orders) {
- var index = -1,
- objCriteria = object.criteria,
- othCriteria = other.criteria,
- length = objCriteria.length,
- ordersLength = orders.length;
-
- while (++index < length) {
- var result = compareAscending(objCriteria[index], othCriteria[index]);
- if (result) {
- if (index >= ordersLength) {
- return result;
- }
- var order = orders[index];
- return result * (order == 'desc' ? -1 : 1);
- }
- }
- // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
- // that causes it, under certain circumstances, to provide the same value for
- // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
- // for more details.
- //
- // This also ensures a stable sort in V8 and other engines.
- // See https://code.google.com/p/v8/issues/detail?id=90 for more details.
- return object.index - other.index;
- }
-
- /**
- * Gets the number of `placeholder` occurrences in `array`.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} placeholder The placeholder to search for.
- * @returns {number} Returns the placeholder count.
- */
- function countHolders(array, placeholder) {
- var length = array.length,
- result = 0;
-
- while (length--) {
- if (array[length] === placeholder) {
- result++;
- }
- }
- return result;
- }
-
- /**
- * Used by `_.deburr` to convert latin-1 supplementary letters to basic latin letters.
- *
- * @private
- * @param {string} letter The matched letter to deburr.
- * @returns {string} Returns the deburred letter.
- */
- function deburrLetter(letter) {
- return deburredLetters[letter];
- }
-
- /**
- * Used by `_.escape` to convert characters to HTML entities.
- *
- * @private
- * @param {string} chr The matched character to escape.
- * @returns {string} Returns the escaped character.
- */
- function escapeHtmlChar(chr) {
- return htmlEscapes[chr];
- }
-
- /**
- * Used by `_.template` to escape characters for inclusion in compiled string literals.
- *
- * @private
- * @param {string} chr The matched character to escape.
- * @returns {string} Returns the escaped character.
- */
- function escapeStringChar(chr) {
- return '\\' + stringEscapes[chr];
- }
-
- /**
- * Gets the index at which the first occurrence of `NaN` is found in `array`.
- *
- * @private
- * @param {Array} array The array to search.
- * @param {number} fromIndex The index to search from.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {number} Returns the index of the matched `NaN`, else `-1`.
- */
- function indexOfNaN(array, fromIndex, fromRight) {
- var length = array.length,
- index = fromIndex + (fromRight ? 0 : -1);
-
- while ((fromRight ? index-- : ++index < length)) {
- var other = array[index];
- if (other !== other) {
- return index;
- }
- }
- return -1;
- }
-
- /**
- * Checks if `value` is a host object in IE < 9.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
- */
- function isHostObject(value) {
- // Many host objects are `Object` objects that can coerce to strings
- // despite having improperly defined `toString` methods.
- var result = false;
- if (value != null && typeof value.toString != 'function') {
- try {
- result = !!(value + '');
- } catch (e) {}
- }
- return result;
- }
-
- /**
- * Checks if `value` is a valid array-like index.
- *
- * @private
- * @param {*} value The value to check.
- * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
- * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
- */
- function isIndex(value, length) {
- value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1;
- length = length == null ? MAX_SAFE_INTEGER : length;
- return value > -1 && value % 1 == 0 && value < length;
- }
-
- /**
- * Converts `iterator` to an array.
- *
- * @private
- * @param {Object} iterator The iterator to convert.
- * @returns {Array} Returns the converted array.
- */
- function iteratorToArray(iterator) {
- var data,
- result = [];
-
- while (!(data = iterator.next()).done) {
- result.push(data.value);
- }
- return result;
- }
-
- /**
- * Converts `map` to an array.
- *
- * @private
- * @param {Object} map The map to convert.
- * @returns {Array} Returns the converted array.
- */
- function mapToArray(map) {
- var index = -1,
- result = Array(map.size);
-
- map.forEach(function(value, key) {
- result[++index] = [key, value];
- });
- return result;
- }
-
- /**
- * Replaces all `placeholder` elements in `array` with an internal placeholder
- * and returns an array of their indexes.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {*} placeholder The placeholder to replace.
- * @returns {Array} Returns the new array of placeholder indexes.
- */
- function replaceHolders(array, placeholder) {
- var index = -1,
- length = array.length,
- resIndex = 0,
- result = [];
-
- while (++index < length) {
- var value = array[index];
- if (value === placeholder || value === PLACEHOLDER) {
- array[index] = PLACEHOLDER;
- result[resIndex++] = index;
- }
- }
- return result;
- }
-
- /**
- * Converts `set` to an array.
- *
- * @private
- * @param {Object} set The set to convert.
- * @returns {Array} Returns the converted array.
- */
- function setToArray(set) {
- var index = -1,
- result = Array(set.size);
-
- set.forEach(function(value) {
- result[++index] = value;
- });
- return result;
- }
-
- /**
- * Gets the number of symbols in `string`.
- *
- * @private
- * @param {string} string The string to inspect.
- * @returns {number} Returns the string size.
- */
- function stringSize(string) {
- if (!(string && reHasComplexSymbol.test(string))) {
- return string.length;
- }
- var result = reComplexSymbol.lastIndex = 0;
- while (reComplexSymbol.test(string)) {
- result++;
- }
- return result;
- }
-
- /**
- * Converts `string` to an array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the converted array.
- */
- function stringToArray(string) {
- return string.match(reComplexSymbol);
- }
-
- /**
- * Used by `_.unescape` to convert HTML entities to characters.
- *
- * @private
- * @param {string} chr The matched character to unescape.
- * @returns {string} Returns the unescaped character.
- */
- function unescapeHtmlChar(chr) {
- return htmlUnescapes[chr];
- }
-
- /*--------------------------------------------------------------------------*/
-
- /**
- * Create a new pristine `lodash` function using the `context` object.
- *
- * @static
- * @memberOf _
- * @category Util
- * @param {Object} [context=root] The context object.
- * @returns {Function} Returns a new `lodash` function.
- * @example
- *
- * _.mixin({ 'foo': _.constant('foo') });
- *
- * var lodash = _.runInContext();
- * lodash.mixin({ 'bar': lodash.constant('bar') });
- *
- * _.isFunction(_.foo);
- * // => true
- * _.isFunction(_.bar);
- * // => false
- *
- * lodash.isFunction(lodash.foo);
- * // => false
- * lodash.isFunction(lodash.bar);
- * // => true
- *
- * // Use `context` to mock `Date#getTime` use in `_.now`.
- * var mock = _.runInContext({
- * 'Date': function() {
- * return { 'getTime': getTimeMock };
- * }
- * });
- *
- * // Create a suped-up `defer` in Node.js.
- * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
- */
- function runInContext(context) {
- context = context ? _.defaults({}, context, _.pick(root, contextProps)) : root;
-
- /** Built-in constructor references. */
- var Date = context.Date,
- Error = context.Error,
- Math = context.Math,
- RegExp = context.RegExp,
- TypeError = context.TypeError;
-
- /** Used for built-in method references. */
- var arrayProto = context.Array.prototype,
- objectProto = context.Object.prototype;
-
- /** Used to resolve the decompiled source of functions. */
- var funcToString = context.Function.prototype.toString;
-
- /** Used to check objects for own properties. */
- var hasOwnProperty = objectProto.hasOwnProperty;
-
- /** Used to generate unique IDs. */
- var idCounter = 0;
-
- /** Used to infer the `Object` constructor. */
- var objectCtorString = funcToString.call(Object);
-
- /**
- * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
- * of values.
- */
- var objectToString = objectProto.toString;
-
- /** Used to restore the original `_` reference in `_.noConflict`. */
- var oldDash = root._;
-
- /** Used to detect if a method is native. */
- var reIsNative = RegExp('^' +
- funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
- .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
- );
-
- /** Built-in value references. */
- var Buffer = moduleExports ? context.Buffer : undefined,
- Reflect = context.Reflect,
- Symbol = context.Symbol,
- Uint8Array = context.Uint8Array,
- clearTimeout = context.clearTimeout,
- enumerate = Reflect ? Reflect.enumerate : undefined,
- getPrototypeOf = Object.getPrototypeOf,
- getOwnPropertySymbols = Object.getOwnPropertySymbols,
- iteratorSymbol = typeof (iteratorSymbol = Symbol && Symbol.iterator) == 'symbol' ? iteratorSymbol : undefined,
- objectCreate = Object.create,
- propertyIsEnumerable = objectProto.propertyIsEnumerable,
- setTimeout = context.setTimeout,
- splice = arrayProto.splice;
-
- /* Built-in method references for those with the same name as other `lodash` methods. */
- var nativeCeil = Math.ceil,
- nativeFloor = Math.floor,
- nativeIsFinite = context.isFinite,
- nativeJoin = arrayProto.join,
- nativeKeys = Object.keys,
- nativeMax = Math.max,
- nativeMin = Math.min,
- nativeParseInt = context.parseInt,
- nativeRandom = Math.random,
- nativeReverse = arrayProto.reverse;
-
- /* Built-in method references that are verified to be native. */
- var Map = getNative(context, 'Map'),
- Set = getNative(context, 'Set'),
- WeakMap = getNative(context, 'WeakMap'),
- nativeCreate = getNative(Object, 'create');
-
- /** Used to store function metadata. */
- var metaMap = WeakMap && new WeakMap;
-
- /** Detect if properties shadowing those on `Object.prototype` are non-enumerable. */
- var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');
-
- /** Used to lookup unminified function names. */
- var realNames = {};
-
- /** Used to detect maps, sets, and weakmaps. */
- var mapCtorString = Map ? funcToString.call(Map) : '',
- setCtorString = Set ? funcToString.call(Set) : '',
- weakMapCtorString = WeakMap ? funcToString.call(WeakMap) : '';
-
- /** Used to convert symbols to primitives and strings. */
- var symbolProto = Symbol ? Symbol.prototype : undefined,
- symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
- symbolToString = symbolProto ? symbolProto.toString : undefined;
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates a `lodash` object which wraps `value` to enable implicit method
- * chaining. Methods that operate on and return arrays, collections, and
- * functions can be chained together. Methods that retrieve a single value or
- * may return a primitive value will automatically end the chain sequence and
- * return the unwrapped value. Otherwise, the value must be unwrapped with
- * `_#value`.
- *
- * Explicit chaining, which must be unwrapped with `_#value` in all cases,
- * may be enabled using `_.chain`.
- *
- * The execution of chained methods is lazy, that is, it's deferred until
- * `_#value` is implicitly or explicitly called.
- *
- * Lazy evaluation allows several methods to support shortcut fusion. Shortcut
- * fusion is an optimization to merge iteratee calls; this avoids the creation
- * of intermediate arrays and can greatly reduce the number of iteratee executions.
- * Sections of a chain sequence qualify for shortcut fusion if the section is
- * applied to an array of at least two hundred elements and any iteratees
- * accept only one argument. The heuristic for whether a section qualifies
- * for shortcut fusion is subject to change.
- *
- * Chaining is supported in custom builds as long as the `_#value` method is
- * directly or indirectly included in the build.
- *
- * In addition to lodash methods, wrappers have `Array` and `String` methods.
- *
- * The wrapper `Array` methods are:
- * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
- *
- * The wrapper `String` methods are:
- * `replace` and `split`
- *
- * The wrapper methods that support shortcut fusion are:
- * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
- * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
- * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
- *
- * The chainable wrapper methods are:
- * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
- * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
- * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
- * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
- * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
- * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
- * `flatten`, `flattenDeep`, `flattenDepth`, `flip`, `flow`, `flowRight`,
- * `fromPairs`, `functions`, `functionsIn`, `groupBy`, `initial`, `intersection`,
- * `intersectionBy`, `intersectionWith`, `invert`, `invertBy`, `invokeMap`,
- * `iteratee`, `keyBy`, `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`,
- * `matches`, `matchesProperty`, `memoize`, `merge`, `mergeWith`, `method`,
- * `methodOf`, `mixin`, `negate`, `nthArg`, `omit`, `omitBy`, `once`, `orderBy`,
- * `over`, `overArgs`, `overEvery`, `overSome`, `partial`, `partialRight`,
- * `partition`, `pick`, `pickBy`, `plant`, `property`, `propertyOf`, `pull`,
- * `pullAll`, `pullAllBy`, `pullAllWith`, `pullAt`, `push`, `range`,
- * `rangeRight`, `rearg`, `reject`, `remove`, `rest`, `reverse`, `sampleSize`,
- * `set`, `setWith`, `shuffle`, `slice`, `sort`, `sortBy`, `splice`, `spread`,
- * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, `tap`, `throttle`,
- * `thru`, `toArray`, `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`,
- * `transform`, `unary`, `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`,
- * `uniqWith`, `unset`, `unshift`, `unzip`, `unzipWith`, `update`, `values`,
- * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`, `zipObject`,
- * `zipObjectDeep`, and `zipWith`
- *
- * The wrapper methods that are **not** chainable by default are:
- * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
- * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `deburr`, `each`, `eachRight`,
- * `endsWith`, `eq`, `escape`, `escapeRegExp`, `every`, `find`, `findIndex`,
- * `findKey`, `findLast`, `findLastIndex`, `findLastKey`, `first`, `floor`,
- * `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`, `forOwnRight`,
- * `get`, `gt`, `gte`, `has`, `hasIn`, `head`, `identity`, `includes`,
- * `indexOf`, `inRange`, `invoke`, `isArguments`, `isArray`, `isArrayBuffer`,
- * `isArrayLike`, `isArrayLikeObject`, `isBoolean`, `isBuffer`, `isDate`,
- * `isElement`, `isEmpty`, `isEqual`, `isEqualWith`, `isError`, `isFinite`,
- * `isFunction`, `isInteger`, `isLength`, `isMap`, `isMatch`, `isMatchWith`,
- * `isNaN`, `isNative`, `isNil`, `isNull`, `isNumber`, `isObject`, `isObjectLike`,
- * `isPlainObject`, `isRegExp`, `isSafeInteger`, `isSet`, `isString`,
- * `isUndefined`, `isTypedArray`, `isWeakMap`, `isWeakSet`, `join`, `kebabCase`,
- * `last`, `lastIndexOf`, `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`,
- * `maxBy`, `mean`, `min`, `minBy`, `noConflict`, `noop`, `now`, `pad`,
- * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
- * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
- * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
- * `sortedLastIndexBy`, `startCase`, `startsWith`, `subtract`, `sum`, `sumBy`,
- * `template`, `times`, `toInteger`, `toJSON`, `toLength`, `toLower`,
- * `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`, `trimEnd`,
- * `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`, `upperFirst`,
- * `value`, and `words`
- *
- * @name _
- * @constructor
- * @category Seq
- * @param {*} value The value to wrap in a `lodash` instance.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * var wrapped = _([1, 2, 3]);
- *
- * // Returns an unwrapped value.
- * wrapped.reduce(_.add);
- * // => 6
- *
- * // Returns a wrapped value.
- * var squares = wrapped.map(square);
- *
- * _.isArray(squares);
- * // => false
- *
- * _.isArray(squares.value());
- * // => true
- */
- function lodash(value) {
- if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
- if (value instanceof LodashWrapper) {
- return value;
- }
- if (hasOwnProperty.call(value, '__wrapped__')) {
- return wrapperClone(value);
- }
- }
- return new LodashWrapper(value);
- }
-
- /**
- * The function whose prototype all chaining wrappers inherit from.
- *
- * @private
- */
- function baseLodash() {
- // No operation performed.
- }
-
- /**
- * The base constructor for creating `lodash` wrapper objects.
- *
- * @private
- * @param {*} value The value to wrap.
- * @param {boolean} [chainAll] Enable chaining for all wrapper methods.
- */
- function LodashWrapper(value, chainAll) {
- this.__wrapped__ = value;
- this.__actions__ = [];
- this.__chain__ = !!chainAll;
- this.__index__ = 0;
- this.__values__ = undefined;
- }
-
- /**
- * By default, the template delimiters used by lodash are like those in
- * embedded Ruby (ERB). Change the following template settings to use
- * alternative delimiters.
- *
- * @static
- * @memberOf _
- * @type {Object}
- */
- lodash.templateSettings = {
-
- /**
- * Used to detect `data` property values to be HTML-escaped.
- *
- * @memberOf _.templateSettings
- * @type {RegExp}
- */
- 'escape': reEscape,
-
- /**
- * Used to detect code to be evaluated.
- *
- * @memberOf _.templateSettings
- * @type {RegExp}
- */
- 'evaluate': reEvaluate,
-
- /**
- * Used to detect `data` property values to inject.
- *
- * @memberOf _.templateSettings
- * @type {RegExp}
- */
- 'interpolate': reInterpolate,
-
- /**
- * Used to reference the data object in the template text.
- *
- * @memberOf _.templateSettings
- * @type {string}
- */
- 'variable': '',
-
- /**
- * Used to import variables into the compiled template.
- *
- * @memberOf _.templateSettings
- * @type {Object}
- */
- 'imports': {
-
- /**
- * A reference to the `lodash` function.
- *
- * @memberOf _.templateSettings.imports
- * @type {Function}
- */
- '_': lodash
- }
- };
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
- *
- * @private
- * @constructor
- * @param {*} value The value to wrap.
- */
- function LazyWrapper(value) {
- this.__wrapped__ = value;
- this.__actions__ = [];
- this.__dir__ = 1;
- this.__filtered__ = false;
- this.__iteratees__ = [];
- this.__takeCount__ = MAX_ARRAY_LENGTH;
- this.__views__ = [];
- }
-
- /**
- * Creates a clone of the lazy wrapper object.
- *
- * @private
- * @name clone
- * @memberOf LazyWrapper
- * @returns {Object} Returns the cloned `LazyWrapper` object.
- */
- function lazyClone() {
- var result = new LazyWrapper(this.__wrapped__);
- result.__actions__ = copyArray(this.__actions__);
- result.__dir__ = this.__dir__;
- result.__filtered__ = this.__filtered__;
- result.__iteratees__ = copyArray(this.__iteratees__);
- result.__takeCount__ = this.__takeCount__;
- result.__views__ = copyArray(this.__views__);
- return result;
- }
-
- /**
- * Reverses the direction of lazy iteration.
- *
- * @private
- * @name reverse
- * @memberOf LazyWrapper
- * @returns {Object} Returns the new reversed `LazyWrapper` object.
- */
- function lazyReverse() {
- if (this.__filtered__) {
- var result = new LazyWrapper(this);
- result.__dir__ = -1;
- result.__filtered__ = true;
- } else {
- result = this.clone();
- result.__dir__ *= -1;
- }
- return result;
- }
-
- /**
- * Extracts the unwrapped value from its lazy wrapper.
- *
- * @private
- * @name value
- * @memberOf LazyWrapper
- * @returns {*} Returns the unwrapped value.
- */
- function lazyValue() {
- var array = this.__wrapped__.value(),
- dir = this.__dir__,
- isArr = isArray(array),
- isRight = dir < 0,
- arrLength = isArr ? array.length : 0,
- view = getView(0, arrLength, this.__views__),
- start = view.start,
- end = view.end,
- length = end - start,
- index = isRight ? end : (start - 1),
- iteratees = this.__iteratees__,
- iterLength = iteratees.length,
- resIndex = 0,
- takeCount = nativeMin(length, this.__takeCount__);
-
- if (!isArr || arrLength < LARGE_ARRAY_SIZE ||
- (arrLength == length && takeCount == length)) {
- return baseWrapperValue(array, this.__actions__);
- }
- var result = [];
-
- outer:
- while (length-- && resIndex < takeCount) {
- index += dir;
-
- var iterIndex = -1,
- value = array[index];
-
- while (++iterIndex < iterLength) {
- var data = iteratees[iterIndex],
- iteratee = data.iteratee,
- type = data.type,
- computed = iteratee(value);
-
- if (type == LAZY_MAP_FLAG) {
- value = computed;
- } else if (!computed) {
- if (type == LAZY_FILTER_FLAG) {
- continue outer;
- } else {
- break outer;
- }
- }
- }
- result[resIndex++] = value;
- }
- return result;
- }
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates an hash object.
- *
- * @private
- * @constructor
- * @returns {Object} Returns the new hash object.
- */
- function Hash() {}
-
- /**
- * Removes `key` and its value from the hash.
- *
- * @private
- * @param {Object} hash The hash to modify.
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
- function hashDelete(hash, key) {
- return hashHas(hash, key) && delete hash[key];
- }
-
- /**
- * Gets the hash value for `key`.
- *
- * @private
- * @param {Object} hash The hash to query.
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
- function hashGet(hash, key) {
- if (nativeCreate) {
- var result = hash[key];
- return result === HASH_UNDEFINED ? undefined : result;
- }
- return hasOwnProperty.call(hash, key) ? hash[key] : undefined;
- }
-
- /**
- * Checks if a hash value for `key` exists.
- *
- * @private
- * @param {Object} hash The hash to query.
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function hashHas(hash, key) {
- return nativeCreate ? hash[key] !== undefined : hasOwnProperty.call(hash, key);
- }
-
- /**
- * Sets the hash `key` to `value`.
- *
- * @private
- * @param {Object} hash The hash to modify.
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- */
- function hashSet(hash, key, value) {
- hash[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
- }
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates a map cache object to store key-value pairs.
- *
- * @private
- * @constructor
- * @param {Array} [values] The values to cache.
- */
- function MapCache(values) {
- var index = -1,
- length = values ? values.length : 0;
-
- this.clear();
- while (++index < length) {
- var entry = values[index];
- this.set(entry[0], entry[1]);
- }
- }
-
- /**
- * Removes all key-value entries from the map.
- *
- * @private
- * @name clear
- * @memberOf MapCache
- */
- function mapClear() {
- this.__data__ = {
- 'hash': new Hash,
- 'map': Map ? new Map : [],
- 'string': new Hash
- };
- }
-
- /**
- * Removes `key` and its value from the map.
- *
- * @private
- * @name delete
- * @memberOf MapCache
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
- function mapDelete(key) {
- var data = this.__data__;
- if (isKeyable(key)) {
- return hashDelete(typeof key == 'string' ? data.string : data.hash, key);
- }
- return Map ? data.map['delete'](key) : assocDelete(data.map, key);
- }
-
- /**
- * Gets the map value for `key`.
- *
- * @private
- * @name get
- * @memberOf MapCache
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
- function mapGet(key) {
- var data = this.__data__;
- if (isKeyable(key)) {
- return hashGet(typeof key == 'string' ? data.string : data.hash, key);
- }
- return Map ? data.map.get(key) : assocGet(data.map, key);
- }
-
- /**
- * Checks if a map value for `key` exists.
- *
- * @private
- * @name has
- * @memberOf MapCache
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function mapHas(key) {
- var data = this.__data__;
- if (isKeyable(key)) {
- return hashHas(typeof key == 'string' ? data.string : data.hash, key);
- }
- return Map ? data.map.has(key) : assocHas(data.map, key);
- }
-
- /**
- * Sets the map `key` to `value`.
- *
- * @private
- * @name set
- * @memberOf MapCache
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns the map cache object.
- */
- function mapSet(key, value) {
- var data = this.__data__;
- if (isKeyable(key)) {
- hashSet(typeof key == 'string' ? data.string : data.hash, key, value);
- } else if (Map) {
- data.map.set(key, value);
- } else {
- assocSet(data.map, key, value);
- }
- return this;
- }
-
- /*------------------------------------------------------------------------*/
-
- /**
- *
- * Creates a set cache object to store unique values.
- *
- * @private
- * @constructor
- * @param {Array} [values] The values to cache.
- */
- function SetCache(values) {
- var index = -1,
- length = values ? values.length : 0;
-
- this.__data__ = new MapCache;
- while (++index < length) {
- this.push(values[index]);
- }
- }
-
- /**
- * Checks if `value` is in `cache`.
- *
- * @private
- * @param {Object} cache The set cache to search.
- * @param {*} value The value to search for.
- * @returns {number} Returns `true` if `value` is found, else `false`.
- */
- function cacheHas(cache, value) {
- var map = cache.__data__;
- if (isKeyable(value)) {
- var data = map.__data__,
- hash = typeof value == 'string' ? data.string : data.hash;
-
- return hash[value] === HASH_UNDEFINED;
- }
- return map.has(value);
- }
-
- /**
- * Adds `value` to the set cache.
- *
- * @private
- * @name push
- * @memberOf SetCache
- * @param {*} value The value to cache.
- */
- function cachePush(value) {
- var map = this.__data__;
- if (isKeyable(value)) {
- var data = map.__data__,
- hash = typeof value == 'string' ? data.string : data.hash;
-
- hash[value] = HASH_UNDEFINED;
- }
- else {
- map.set(value, HASH_UNDEFINED);
- }
- }
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates a stack cache object to store key-value pairs.
- *
- * @private
- * @constructor
- * @param {Array} [values] The values to cache.
- */
- function Stack(values) {
- var index = -1,
- length = values ? values.length : 0;
-
- this.clear();
- while (++index < length) {
- var entry = values[index];
- this.set(entry[0], entry[1]);
- }
- }
-
- /**
- * Removes all key-value entries from the stack.
- *
- * @private
- * @name clear
- * @memberOf Stack
- */
- function stackClear() {
- this.__data__ = { 'array': [], 'map': null };
- }
-
- /**
- * Removes `key` and its value from the stack.
- *
- * @private
- * @name delete
- * @memberOf Stack
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
- function stackDelete(key) {
- var data = this.__data__,
- array = data.array;
-
- return array ? assocDelete(array, key) : data.map['delete'](key);
- }
-
- /**
- * Gets the stack value for `key`.
- *
- * @private
- * @name get
- * @memberOf Stack
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
- function stackGet(key) {
- var data = this.__data__,
- array = data.array;
-
- return array ? assocGet(array, key) : data.map.get(key);
- }
-
- /**
- * Checks if a stack value for `key` exists.
- *
- * @private
- * @name has
- * @memberOf Stack
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function stackHas(key) {
- var data = this.__data__,
- array = data.array;
-
- return array ? assocHas(array, key) : data.map.has(key);
- }
-
- /**
- * Sets the stack `key` to `value`.
- *
- * @private
- * @name set
- * @memberOf Stack
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns the stack cache object.
- */
- function stackSet(key, value) {
- var data = this.__data__,
- array = data.array;
-
- if (array) {
- if (array.length < (LARGE_ARRAY_SIZE - 1)) {
- assocSet(array, key, value);
- } else {
- data.array = null;
- data.map = new MapCache(array);
- }
- }
- var map = data.map;
- if (map) {
- map.set(key, value);
- }
- return this;
- }
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Removes `key` and its value from the associative array.
- *
- * @private
- * @param {Array} array The array to query.
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
- function assocDelete(array, key) {
- var index = assocIndexOf(array, key);
- if (index < 0) {
- return false;
- }
- var lastIndex = array.length - 1;
- if (index == lastIndex) {
- array.pop();
- } else {
- splice.call(array, index, 1);
- }
- return true;
- }
-
- /**
- * Gets the associative array value for `key`.
- *
- * @private
- * @param {Array} array The array to query.
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
- function assocGet(array, key) {
- var index = assocIndexOf(array, key);
- return index < 0 ? undefined : array[index][1];
- }
-
- /**
- * Checks if an associative array value for `key` exists.
- *
- * @private
- * @param {Array} array The array to query.
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function assocHas(array, key) {
- return assocIndexOf(array, key) > -1;
- }
-
- /**
- * Gets the index at which the first occurrence of `key` is found in `array`
- * of key-value pairs.
- *
- * @private
- * @param {Array} array The array to search.
- * @param {*} key The key to search for.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function assocIndexOf(array, key) {
- var length = array.length;
- while (length--) {
- if (eq(array[length][0], key)) {
- return length;
- }
- }
- return -1;
- }
-
- /**
- * Sets the associative array `key` to `value`.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- */
- function assocSet(array, key, value) {
- var index = assocIndexOf(array, key);
- if (index < 0) {
- array.push([key, value]);
- } else {
- array[index][1] = value;
- }
- }
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Used by `_.defaults` to customize its `_.assignIn` use.
- *
- * @private
- * @param {*} objValue The destination value.
- * @param {*} srcValue The source value.
- * @param {string} key The key of the property to assign.
- * @param {Object} object The parent object of `objValue`.
- * @returns {*} Returns the value to assign.
- */
- function assignInDefaults(objValue, srcValue, key, object) {
- if (objValue === undefined ||
- (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
- return srcValue;
- }
- return objValue;
- }
-
- /**
- * This function is like `assignValue` except that it doesn't assign
- * `undefined` values.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {string} key The key of the property to assign.
- * @param {*} value The value to assign.
- */
- function assignMergeValue(object, key, value) {
- if ((value !== undefined && !eq(object[key], value)) ||
- (typeof key == 'number' && value === undefined && !(key in object))) {
- object[key] = value;
- }
- }
-
- /**
- * Assigns `value` to `key` of `object` if the existing value is not equivalent
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
- * for equality comparisons.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {string} key The key of the property to assign.
- * @param {*} value The value to assign.
- */
- function assignValue(object, key, value) {
- var objValue = object[key];
- if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
- (value === undefined && !(key in object))) {
- object[key] = value;
- }
- }
-
- /**
- * Aggregates elements of `collection` on `accumulator` with keys transformed
- * by `iteratee` and values set by `setter`.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} setter The function to set `accumulator` values.
- * @param {Function} iteratee The iteratee to transform keys.
- * @param {Object} accumulator The initial aggregated object.
- * @returns {Function} Returns `accumulator`.
- */
- function baseAggregator(collection, setter, iteratee, accumulator) {
- baseEach(collection, function(value, key, collection) {
- setter(accumulator, value, iteratee(value), collection);
- });
- return accumulator;
- }
-
- /**
- * The base implementation of `_.assign` without support for multiple sources
- * or `customizer` functions.
- *
- * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @returns {Object} Returns `object`.
- */
- function baseAssign(object, source) {
- return object && copyObject(source, keys(source), object);
- }
-
- /**
- * The base implementation of `_.at` without support for individual paths.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {string[]} paths The property paths of elements to pick.
- * @returns {Array} Returns the new array of picked elements.
- */
- function baseAt(object, paths) {
- var index = -1,
- isNil = object == null,
- length = paths.length,
- result = Array(length);
-
- while (++index < length) {
- result[index] = isNil ? undefined : get(object, paths[index]);
- }
- return result;
- }
-
- /**
- * Casts `value` to an empty array if it's not an array like object.
- *
- * @private
- * @param {*} value The value to inspect.
- * @returns {Array} Returns the array-like object.
- */
- function baseCastArrayLikeObject(value) {
- return isArrayLikeObject(value) ? value : [];
- }
-
- /**
- * Casts `value` to `identity` if it's not a function.
- *
- * @private
- * @param {*} value The value to inspect.
- * @returns {Array} Returns the array-like object.
- */
- function baseCastFunction(value) {
- return typeof value == 'function' ? value : identity;
- }
-
- /**
- * Casts `value` to a path array if it's not one.
- *
- * @private
- * @param {*} value The value to inspect.
- * @returns {Array} Returns the cast property path array.
- */
- function baseCastPath(value) {
- return isArray(value) ? value : stringToPath(value);
- }
-
- /**
- * The base implementation of `_.clamp` which doesn't coerce arguments to numbers.
- *
- * @private
- * @param {number} number The number to clamp.
- * @param {number} [lower] The lower bound.
- * @param {number} upper The upper bound.
- * @returns {number} Returns the clamped number.
- */
- function baseClamp(number, lower, upper) {
- if (number === number) {
- if (upper !== undefined) {
- number = number <= upper ? number : upper;
- }
- if (lower !== undefined) {
- number = number >= lower ? number : lower;
- }
- }
- return number;
- }
-
- /**
- * The base implementation of `_.clone` and `_.cloneDeep` which tracks
- * traversed objects.
- *
- * @private
- * @param {*} value The value to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @param {boolean} [isFull] Specify a clone including symbols.
- * @param {Function} [customizer] The function to customize cloning.
- * @param {string} [key] The key of `value`.
- * @param {Object} [object] The parent object of `value`.
- * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
- * @returns {*} Returns the cloned value.
- */
- function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
- var result;
- if (customizer) {
- result = object ? customizer(value, key, object, stack) : customizer(value);
- }
- if (result !== undefined) {
- return result;
- }
- if (!isObject(value)) {
- return value;
- }
- var isArr = isArray(value);
- if (isArr) {
- result = initCloneArray(value);
- if (!isDeep) {
- return copyArray(value, result);
- }
- } else {
- var tag = getTag(value),
- isFunc = tag == funcTag || tag == genTag;
-
- if (isBuffer(value)) {
- return cloneBuffer(value, isDeep);
- }
- if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
- if (isHostObject(value)) {
- return object ? value : {};
- }
- result = initCloneObject(isFunc ? {} : value);
- if (!isDeep) {
- result = baseAssign(result, value);
- return isFull ? copySymbols(value, result) : result;
- }
- } else {
- if (!cloneableTags[tag]) {
- return object ? value : {};
- }
- result = initCloneByTag(value, tag, isDeep);
- }
- }
- // Check for circular references and return its corresponding clone.
- stack || (stack = new Stack);
- var stacked = stack.get(value);
- if (stacked) {
- return stacked;
- }
- stack.set(value, result);
-
- // Recursively populate clone (susceptible to call stack limits).
- (isArr ? arrayEach : baseForOwn)(value, function(subValue, key) {
- assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
- });
- return (isFull && !isArr) ? copySymbols(value, result) : result;
- }
-
- /**
- * The base implementation of `_.conforms` which doesn't clone `source`.
- *
- * @private
- * @param {Object} source The object of property predicates to conform to.
- * @returns {Function} Returns the new function.
- */
- function baseConforms(source) {
- var props = keys(source),
- length = props.length;
-
- return function(object) {
- if (object == null) {
- return !length;
- }
- var index = length;
- while (index--) {
- var key = props[index],
- predicate = source[key],
- value = object[key];
-
- if ((value === undefined && !(key in Object(object))) || !predicate(value)) {
- return false;
- }
- }
- return true;
- };
- }
-
- /**
- * The base implementation of `_.create` without support for assigning
- * properties to the created object.
- *
- * @private
- * @param {Object} prototype The object to inherit from.
- * @returns {Object} Returns the new object.
- */
- function baseCreate(proto) {
- return isObject(proto) ? objectCreate(proto) : {};
- }
-
- /**
- * The base implementation of `_.delay` and `_.defer` which accepts an array
- * of `func` arguments.
- *
- * @private
- * @param {Function} func The function to delay.
- * @param {number} wait The number of milliseconds to delay invocation.
- * @param {Object} args The arguments to provide to `func`.
- * @returns {number} Returns the timer id.
- */
- function baseDelay(func, wait, args) {
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- return setTimeout(function() { func.apply(undefined, args); }, wait);
- }
-
- /**
- * The base implementation of methods like `_.difference` without support for
- * excluding multiple arrays or iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {Array} values The values to exclude.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- */
- function baseDifference(array, values, iteratee, comparator) {
- var index = -1,
- includes = arrayIncludes,
- isCommon = true,
- length = array.length,
- result = [],
- valuesLength = values.length;
-
- if (!length) {
- return result;
- }
- if (iteratee) {
- values = arrayMap(values, baseUnary(iteratee));
- }
- if (comparator) {
- includes = arrayIncludesWith;
- isCommon = false;
- }
- else if (values.length >= LARGE_ARRAY_SIZE) {
- includes = cacheHas;
- isCommon = false;
- values = new SetCache(values);
- }
- outer:
- while (++index < length) {
- var value = array[index],
- computed = iteratee ? iteratee(value) : value;
-
- if (isCommon && computed === computed) {
- var valuesIndex = valuesLength;
- while (valuesIndex--) {
- if (values[valuesIndex] === computed) {
- continue outer;
- }
- }
- result.push(value);
- }
- else if (!includes(values, computed, comparator)) {
- result.push(value);
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `_.forEach` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array|Object} Returns `collection`.
- */
- var baseEach = createBaseEach(baseForOwn);
-
- /**
- * The base implementation of `_.forEachRight` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array|Object} Returns `collection`.
- */
- var baseEachRight = createBaseEach(baseForOwnRight, true);
-
- /**
- * The base implementation of `_.every` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if all elements pass the predicate check, else `false`
- */
- function baseEvery(collection, predicate) {
- var result = true;
- baseEach(collection, function(value, index, collection) {
- result = !!predicate(value, index, collection);
- return result;
- });
- return result;
- }
-
- /**
- * The base implementation of `_.fill` without an iteratee call guard.
- *
- * @private
- * @param {Array} array The array to fill.
- * @param {*} value The value to fill `array` with.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns `array`.
- */
- function baseFill(array, value, start, end) {
- var length = array.length;
-
- start = toInteger(start);
- if (start < 0) {
- start = -start > length ? 0 : (length + start);
- }
- end = (end === undefined || end > length) ? length : toInteger(end);
- if (end < 0) {
- end += length;
- }
- end = start > end ? 0 : toLength(end);
- while (start < end) {
- array[start++] = value;
- }
- return array;
- }
-
- /**
- * The base implementation of `_.filter` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- */
- function baseFilter(collection, predicate) {
- var result = [];
- baseEach(collection, function(value, index, collection) {
- if (predicate(value, index, collection)) {
- result.push(value);
- }
- });
- return result;
- }
-
- /**
- * The base implementation of `_.flatten` with support for restricting flattening.
- *
- * @private
- * @param {Array} array The array to flatten.
- * @param {number} depth The maximum recursion depth.
- * @param {boolean} [isStrict] Restrict flattening to arrays-like objects.
- * @param {Array} [result=[]] The initial result value.
- * @returns {Array} Returns the new flattened array.
- */
- function baseFlatten(array, depth, isStrict, result) {
- result || (result = []);
-
- var index = -1,
- length = array.length;
-
- while (++index < length) {
- var value = array[index];
- if (depth > 0 && isArrayLikeObject(value) &&
- (isStrict || isArray(value) || isArguments(value))) {
- if (depth > 1) {
- // Recursively flatten arrays (susceptible to call stack limits).
- baseFlatten(value, depth - 1, isStrict, result);
- } else {
- arrayPush(result, value);
- }
- } else if (!isStrict) {
- result[result.length] = value;
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `baseForIn` and `baseForOwn` which iterates
- * over `object` properties returned by `keysFunc` invoking `iteratee` for
- * each property. Iteratee functions may exit iteration early by explicitly
- * returning `false`.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {Function} keysFunc The function to get the keys of `object`.
- * @returns {Object} Returns `object`.
- */
- var baseFor = createBaseFor();
-
- /**
- * This function is like `baseFor` except that it iterates over properties
- * in the opposite order.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {Function} keysFunc The function to get the keys of `object`.
- * @returns {Object} Returns `object`.
- */
- var baseForRight = createBaseFor(true);
-
- /**
- * The base implementation of `_.forIn` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Object} Returns `object`.
- */
- function baseForIn(object, iteratee) {
- return object == null ? object : baseFor(object, iteratee, keysIn);
- }
-
- /**
- * The base implementation of `_.forOwn` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Object} Returns `object`.
- */
- function baseForOwn(object, iteratee) {
- return object && baseFor(object, iteratee, keys);
- }
-
- /**
- * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Object} Returns `object`.
- */
- function baseForOwnRight(object, iteratee) {
- return object && baseForRight(object, iteratee, keys);
- }
-
- /**
- * The base implementation of `_.functions` which creates an array of
- * `object` function property names filtered from `props`.
- *
- * @private
- * @param {Object} object The object to inspect.
- * @param {Array} props The property names to filter.
- * @returns {Array} Returns the new array of filtered property names.
- */
- function baseFunctions(object, props) {
- return arrayFilter(props, function(key) {
- return isFunction(object[key]);
- });
- }
-
- /**
- * The base implementation of `_.get` without support for default values.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the property to get.
- * @returns {*} Returns the resolved value.
- */
- function baseGet(object, path) {
- path = isKey(path, object) ? [path + ''] : baseCastPath(path);
-
- var index = 0,
- length = path.length;
-
- while (object != null && index < length) {
- object = object[path[index++]];
- }
- return (index && index == length) ? object : undefined;
- }
-
- /**
- * The base implementation of `_.has` without support for deep paths.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
- function baseHas(object, key) {
- // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
- // that are composed entirely of index properties, return `false` for
- // `hasOwnProperty` checks of them.
- return hasOwnProperty.call(object, key) ||
- (typeof object == 'object' && key in object && getPrototypeOf(object) === null);
- }
-
- /**
- * The base implementation of `_.hasIn` without support for deep paths.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
- function baseHasIn(object, key) {
- return key in Object(object);
- }
-
- /**
- * The base implementation of `_.inRange` which doesn't coerce arguments to numbers.
- *
- * @private
- * @param {number} number The number to check.
- * @param {number} start The start of the range.
- * @param {number} end The end of the range.
- * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
- */
- function baseInRange(number, start, end) {
- return number >= nativeMin(start, end) && number < nativeMax(start, end);
- }
-
- /**
- * The base implementation of methods like `_.intersection`, without support
- * for iteratee shorthands, that accepts an array of arrays to inspect.
- *
- * @private
- * @param {Array} arrays The arrays to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of shared values.
- */
- function baseIntersection(arrays, iteratee, comparator) {
- var includes = comparator ? arrayIncludesWith : arrayIncludes,
- length = arrays[0].length,
- othLength = arrays.length,
- othIndex = othLength,
- caches = Array(othLength),
- maxLength = Infinity,
- result = [];
-
- while (othIndex--) {
- var array = arrays[othIndex];
- if (othIndex && iteratee) {
- array = arrayMap(array, baseUnary(iteratee));
- }
- maxLength = nativeMin(array.length, maxLength);
- caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
- ? new SetCache(othIndex && array)
- : undefined;
- }
- array = arrays[0];
-
- var index = -1,
- seen = caches[0];
-
- outer:
- while (++index < length && result.length < maxLength) {
- var value = array[index],
- computed = iteratee ? iteratee(value) : value;
-
- if (!(seen
- ? cacheHas(seen, computed)
- : includes(result, computed, comparator)
- )) {
- othIndex = othLength;
- while (--othIndex) {
- var cache = caches[othIndex];
- if (!(cache
- ? cacheHas(cache, computed)
- : includes(arrays[othIndex], computed, comparator))
- ) {
- continue outer;
- }
- }
- if (seen) {
- seen.push(computed);
- }
- result.push(value);
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `_.invert` and `_.invertBy` which inverts
- * `object` with values transformed by `iteratee` and set by `setter`.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} setter The function to set `accumulator` values.
- * @param {Function} iteratee The iteratee to transform values.
- * @param {Object} accumulator The initial inverted object.
- * @returns {Function} Returns `accumulator`.
- */
- function baseInverter(object, setter, iteratee, accumulator) {
- baseForOwn(object, function(value, key, object) {
- setter(accumulator, iteratee(value), key, object);
- });
- return accumulator;
- }
-
- /**
- * The base implementation of `_.invoke` without support for individual
- * method arguments.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the method to invoke.
- * @param {Array} args The arguments to invoke the method with.
- * @returns {*} Returns the result of the invoked method.
- */
- function baseInvoke(object, path, args) {
- if (!isKey(path, object)) {
- path = baseCastPath(path);
- object = parent(object, path);
- path = last(path);
- }
- var func = object == null ? object : object[path];
- return func == null ? undefined : apply(func, object, args);
- }
-
- /**
- * The base implementation of `_.isEqual` which supports partial comparisons
- * and tracks traversed objects.
- *
- * @private
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @param {Function} [customizer] The function to customize comparisons.
- * @param {boolean} [bitmask] The bitmask of comparison flags.
- * The bitmask may be composed of the following flags:
- * 1 - Unordered comparison
- * 2 - Partial comparison
- * @param {Object} [stack] Tracks traversed `value` and `other` objects.
- * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
- */
- function baseIsEqual(value, other, customizer, bitmask, stack) {
- if (value === other) {
- return true;
- }
- if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
- return value !== value && other !== other;
- }
- return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
- }
-
- /**
- * A specialized version of `baseIsEqual` for arrays and objects which performs
- * deep comparisons and tracks traversed objects enabling objects with circular
- * references to be compared.
- *
- * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Function} [customizer] The function to customize comparisons.
- * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual` for more details.
- * @param {Object} [stack] Tracks traversed `object` and `other` objects.
- * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
- */
- function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
- var objIsArr = isArray(object),
- othIsArr = isArray(other),
- objTag = arrayTag,
- othTag = arrayTag;
-
- if (!objIsArr) {
- objTag = getTag(object);
- objTag = objTag == argsTag ? objectTag : objTag;
- }
- if (!othIsArr) {
- othTag = getTag(other);
- othTag = othTag == argsTag ? objectTag : othTag;
- }
- var objIsObj = objTag == objectTag && !isHostObject(object),
- othIsObj = othTag == objectTag && !isHostObject(other),
- isSameTag = objTag == othTag;
-
- if (isSameTag && !objIsObj) {
- stack || (stack = new Stack);
- return (objIsArr || isTypedArray(object))
- ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
- : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
- }
- if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
- var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
- othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
-
- if (objIsWrapped || othIsWrapped) {
- stack || (stack = new Stack);
- return equalFunc(objIsWrapped ? object.value() : object, othIsWrapped ? other.value() : other, customizer, bitmask, stack);
- }
- }
- if (!isSameTag) {
- return false;
- }
- stack || (stack = new Stack);
- return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
- }
-
- /**
- * The base implementation of `_.isMatch` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The object to inspect.
- * @param {Object} source The object of property values to match.
- * @param {Array} matchData The property names, values, and compare flags to match.
- * @param {Function} [customizer] The function to customize comparisons.
- * @returns {boolean} Returns `true` if `object` is a match, else `false`.
- */
- function baseIsMatch(object, source, matchData, customizer) {
- var index = matchData.length,
- length = index,
- noCustomizer = !customizer;
-
- if (object == null) {
- return !length;
- }
- object = Object(object);
- while (index--) {
- var data = matchData[index];
- if ((noCustomizer && data[2])
- ? data[1] !== object[data[0]]
- : !(data[0] in object)
- ) {
- return false;
- }
- }
- while (++index < length) {
- data = matchData[index];
- var key = data[0],
- objValue = object[key],
- srcValue = data[1];
-
- if (noCustomizer && data[2]) {
- if (objValue === undefined && !(key in object)) {
- return false;
- }
- } else {
- var stack = new Stack,
- result = customizer ? customizer(objValue, srcValue, key, object, source, stack) : undefined;
-
- if (!(result === undefined
- ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
- : result
- )) {
- return false;
- }
- }
- }
- return true;
- }
-
- /**
- * The base implementation of `_.iteratee`.
- *
- * @private
- * @param {*} [value=_.identity] The value to convert to an iteratee.
- * @returns {Function} Returns the iteratee.
- */
- function baseIteratee(value) {
- var type = typeof value;
- if (type == 'function') {
- return value;
- }
- if (value == null) {
- return identity;
- }
- if (type == 'object') {
- return isArray(value)
- ? baseMatchesProperty(value[0], value[1])
- : baseMatches(value);
- }
- return property(value);
- }
-
- /**
- * The base implementation of `_.keys` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- */
- function baseKeys(object) {
- return nativeKeys(Object(object));
- }
-
- /**
- * The base implementation of `_.keysIn` which doesn't skip the constructor
- * property of prototypes or treat sparse arrays as dense.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- */
- function baseKeysIn(object) {
- object = object == null ? object : Object(object);
-
- var result = [];
- for (var key in object) {
- result.push(key);
- }
- return result;
- }
-
- // Fallback for IE < 9 with es6-shim.
- if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) {
- baseKeysIn = function(object) {
- return iteratorToArray(enumerate(object));
- };
- }
-
- /**
- * The base implementation of `_.map` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns the new mapped array.
- */
- function baseMap(collection, iteratee) {
- var index = -1,
- result = isArrayLike(collection) ? Array(collection.length) : [];
-
- baseEach(collection, function(value, key, collection) {
- result[++index] = iteratee(value, key, collection);
- });
- return result;
- }
-
- /**
- * The base implementation of `_.matches` which doesn't clone `source`.
- *
- * @private
- * @param {Object} source The object of property values to match.
- * @returns {Function} Returns the new function.
- */
- function baseMatches(source) {
- var matchData = getMatchData(source);
- if (matchData.length == 1 && matchData[0][2]) {
- var key = matchData[0][0],
- value = matchData[0][1];
-
- return function(object) {
- if (object == null) {
- return false;
- }
- return object[key] === value &&
- (value !== undefined || (key in Object(object)));
- };
- }
- return function(object) {
- return object === source || baseIsMatch(object, source, matchData);
- };
- }
-
- /**
- * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
- *
- * @private
- * @param {string} path The path of the property to get.
- * @param {*} srcValue The value to match.
- * @returns {Function} Returns the new function.
- */
- function baseMatchesProperty(path, srcValue) {
- return function(object) {
- var objValue = get(object, path);
- return (objValue === undefined && objValue === srcValue)
- ? hasIn(object, path)
- : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
- };
- }
-
- /**
- * The base implementation of `_.merge` without support for multiple sources.
- *
- * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @param {number} srcIndex The index of `source`.
- * @param {Function} [customizer] The function to customize merged values.
- * @param {Object} [stack] Tracks traversed source values and their merged counterparts.
- */
- function baseMerge(object, source, srcIndex, customizer, stack) {
- if (object === source) {
- return;
- }
- var props = (isArray(source) || isTypedArray(source))
- ? undefined
- : keysIn(source);
-
- arrayEach(props || source, function(srcValue, key) {
- if (props) {
- key = srcValue;
- srcValue = source[key];
- }
- if (isObject(srcValue)) {
- stack || (stack = new Stack);
- baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
- }
- else {
- var newValue = customizer
- ? customizer(object[key], srcValue, (key + ''), object, source, stack)
- : undefined;
-
- if (newValue === undefined) {
- newValue = srcValue;
- }
- assignMergeValue(object, key, newValue);
- }
- });
- }
-
- /**
- * A specialized version of `baseMerge` for arrays and objects which performs
- * deep merges and tracks traversed objects enabling objects with circular
- * references to be merged.
- *
- * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @param {string} key The key of the value to merge.
- * @param {number} srcIndex The index of `source`.
- * @param {Function} mergeFunc The function to merge values.
- * @param {Function} [customizer] The function to customize assigned values.
- * @param {Object} [stack] Tracks traversed source values and their merged counterparts.
- */
- function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
- var objValue = object[key],
- srcValue = source[key],
- stacked = stack.get(srcValue);
-
- if (stacked) {
- assignMergeValue(object, key, stacked);
- return;
- }
- var newValue = customizer
- ? customizer(objValue, srcValue, (key + ''), object, source, stack)
- : undefined;
-
- var isCommon = newValue === undefined;
-
- if (isCommon) {
- newValue = srcValue;
- if (isArray(srcValue) || isTypedArray(srcValue)) {
- if (isArray(objValue)) {
- newValue = objValue;
- }
- else if (isArrayLikeObject(objValue)) {
- newValue = copyArray(objValue);
- }
- else {
- isCommon = false;
- newValue = baseClone(srcValue, !customizer);
- }
- }
- else if (isPlainObject(srcValue) || isArguments(srcValue)) {
- if (isArguments(objValue)) {
- newValue = toPlainObject(objValue);
- }
- else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
- isCommon = false;
- newValue = baseClone(srcValue, !customizer);
- }
- else {
- newValue = objValue;
- }
- }
- else {
- isCommon = false;
- }
- }
- stack.set(srcValue, newValue);
-
- if (isCommon) {
- // Recursively merge objects and arrays (susceptible to call stack limits).
- mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
- }
- stack['delete'](srcValue);
- assignMergeValue(object, key, newValue);
- }
-
- /**
- * The base implementation of `_.orderBy` without param guards.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
- * @param {string[]} orders The sort orders of `iteratees`.
- * @returns {Array} Returns the new sorted array.
- */
- function baseOrderBy(collection, iteratees, orders) {
- var index = -1;
- iteratees = arrayMap(iteratees.length ? iteratees : Array(1), getIteratee());
-
- var result = baseMap(collection, function(value, key, collection) {
- var criteria = arrayMap(iteratees, function(iteratee) {
- return iteratee(value);
- });
- return { 'criteria': criteria, 'index': ++index, 'value': value };
- });
-
- return baseSortBy(result, function(object, other) {
- return compareMultiple(object, other, orders);
- });
- }
-
- /**
- * The base implementation of `_.pick` without support for individual
- * property names.
- *
- * @private
- * @param {Object} object The source object.
- * @param {string[]} props The property names to pick.
- * @returns {Object} Returns the new object.
- */
- function basePick(object, props) {
- object = Object(object);
- return arrayReduce(props, function(result, key) {
- if (key in object) {
- result[key] = object[key];
- }
- return result;
- }, {});
- }
-
- /**
- * The base implementation of `_.pickBy` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The source object.
- * @param {Function} predicate The function invoked per property.
- * @returns {Object} Returns the new object.
- */
- function basePickBy(object, predicate) {
- var result = {};
- baseForIn(object, function(value, key) {
- if (predicate(value, key)) {
- result[key] = value;
- }
- });
- return result;
- }
-
- /**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new function.
- */
- function baseProperty(key) {
- return function(object) {
- return object == null ? undefined : object[key];
- };
- }
-
- /**
- * A specialized version of `baseProperty` which supports deep paths.
- *
- * @private
- * @param {Array|string} path The path of the property to get.
- * @returns {Function} Returns the new function.
- */
- function basePropertyDeep(path) {
- return function(object) {
- return baseGet(object, path);
- };
- }
-
- /**
- * The base implementation of `_.pullAllBy` without support for iteratee
- * shorthands.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns `array`.
- */
- function basePullAll(array, values, iteratee, comparator) {
- var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
- index = -1,
- length = values.length,
- seen = array;
-
- if (iteratee) {
- seen = arrayMap(array, baseUnary(iteratee));
- }
- while (++index < length) {
- var fromIndex = 0,
- value = values[index],
- computed = iteratee ? iteratee(value) : value;
-
- while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
- if (seen !== array) {
- splice.call(seen, fromIndex, 1);
- }
- splice.call(array, fromIndex, 1);
- }
- }
- return array;
- }
-
- /**
- * The base implementation of `_.pullAt` without support for individual
- * indexes or capturing the removed elements.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {number[]} indexes The indexes of elements to remove.
- * @returns {Array} Returns `array`.
- */
- function basePullAt(array, indexes) {
- var length = array ? indexes.length : 0,
- lastIndex = length - 1;
-
- while (length--) {
- var index = indexes[length];
- if (lastIndex == length || index != previous) {
- var previous = index;
- if (isIndex(index)) {
- splice.call(array, index, 1);
- }
- else if (!isKey(index, array)) {
- var path = baseCastPath(index),
- object = parent(array, path);
-
- if (object != null) {
- delete object[last(path)];
- }
- }
- else {
- delete array[index];
- }
- }
- }
- return array;
- }
-
- /**
- * The base implementation of `_.random` without support for returning
- * floating-point numbers.
- *
- * @private
- * @param {number} lower The lower bound.
- * @param {number} upper The upper bound.
- * @returns {number} Returns the random number.
- */
- function baseRandom(lower, upper) {
- return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
- }
-
- /**
- * The base implementation of `_.range` and `_.rangeRight` which doesn't
- * coerce arguments to numbers.
- *
- * @private
- * @param {number} start The start of the range.
- * @param {number} end The end of the range.
- * @param {number} step The value to increment or decrement by.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Array} Returns the new array of numbers.
- */
- function baseRange(start, end, step, fromRight) {
- var index = -1,
- length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
- result = Array(length);
-
- while (length--) {
- result[fromRight ? length : ++index] = start;
- start += step;
- }
- return result;
- }
-
- /**
- * The base implementation of `_.set`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the property to set.
- * @param {*} value The value to set.
- * @param {Function} [customizer] The function to customize path creation.
- * @returns {Object} Returns `object`.
- */
- function baseSet(object, path, value, customizer) {
- path = isKey(path, object) ? [path + ''] : baseCastPath(path);
-
- var index = -1,
- length = path.length,
- lastIndex = length - 1,
- nested = object;
-
- while (nested != null && ++index < length) {
- var key = path[index];
- if (isObject(nested)) {
- var newValue = value;
- if (index != lastIndex) {
- var objValue = nested[key];
- newValue = customizer ? customizer(objValue, key, nested) : undefined;
- if (newValue === undefined) {
- newValue = objValue == null
- ? (isIndex(path[index + 1]) ? [] : {})
- : objValue;
- }
- }
- assignValue(nested, key, newValue);
- }
- nested = nested[key];
- }
- return object;
- }
-
- /**
- * The base implementation of `setData` without support for hot loop detection.
- *
- * @private
- * @param {Function} func The function to associate metadata with.
- * @param {*} data The metadata.
- * @returns {Function} Returns `func`.
- */
- var baseSetData = !metaMap ? identity : function(func, data) {
- metaMap.set(func, data);
- return func;
- };
-
- /**
- * The base implementation of `_.slice` without an iteratee call guard.
- *
- * @private
- * @param {Array} array The array to slice.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns the slice of `array`.
- */
- function baseSlice(array, start, end) {
- var index = -1,
- length = array.length;
-
- if (start < 0) {
- start = -start > length ? 0 : (length + start);
- }
- end = end > length ? length : end;
- if (end < 0) {
- end += length;
- }
- length = start > end ? 0 : ((end - start) >>> 0);
- start >>>= 0;
-
- var result = Array(length);
- while (++index < length) {
- result[index] = array[index + start];
- }
- return result;
- }
-
- /**
- * The base implementation of `_.some` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if any element passes the predicate check, else `false`.
- */
- function baseSome(collection, predicate) {
- var result;
-
- baseEach(collection, function(value, index, collection) {
- result = predicate(value, index, collection);
- return !result;
- });
- return !!result;
- }
-
- /**
- * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
- * performs a binary search of `array` to determine the index at which `value`
- * should be inserted into `array` in order to maintain its sort order.
- *
- * @private
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @param {boolean} [retHighest] Specify returning the highest qualified index.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- */
- function baseSortedIndex(array, value, retHighest) {
- var low = 0,
- high = array ? array.length : low;
-
- if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
- while (low < high) {
- var mid = (low + high) >>> 1,
- computed = array[mid];
-
- if ((retHighest ? (computed <= value) : (computed < value)) && computed !== null) {
- low = mid + 1;
- } else {
- high = mid;
- }
- }
- return high;
- }
- return baseSortedIndexBy(array, value, identity, retHighest);
- }
-
- /**
- * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
- * which invokes `iteratee` for `value` and each element of `array` to compute
- * their sort ranking. The iteratee is invoked with one argument; (value).
- *
- * @private
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @param {Function} iteratee The iteratee invoked per element.
- * @param {boolean} [retHighest] Specify returning the highest qualified index.
- * @returns {number} Returns the index at which `value` should be inserted into `array`.
- */
- function baseSortedIndexBy(array, value, iteratee, retHighest) {
- value = iteratee(value);
-
- var low = 0,
- high = array ? array.length : 0,
- valIsNaN = value !== value,
- valIsNull = value === null,
- valIsUndef = value === undefined;
-
- while (low < high) {
- var mid = nativeFloor((low + high) / 2),
- computed = iteratee(array[mid]),
- isDef = computed !== undefined,
- isReflexive = computed === computed;
-
- if (valIsNaN) {
- var setLow = isReflexive || retHighest;
- } else if (valIsNull) {
- setLow = isReflexive && isDef && (retHighest || computed != null);
- } else if (valIsUndef) {
- setLow = isReflexive && (retHighest || isDef);
- } else if (computed == null) {
- setLow = false;
- } else {
- setLow = retHighest ? (computed <= value) : (computed < value);
- }
- if (setLow) {
- low = mid + 1;
- } else {
- high = mid;
- }
- }
- return nativeMin(high, MAX_ARRAY_INDEX);
- }
-
- /**
- * The base implementation of `_.sortedUniq`.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @returns {Array} Returns the new duplicate free array.
- */
- function baseSortedUniq(array) {
- return baseSortedUniqBy(array);
- }
-
- /**
- * The base implementation of `_.sortedUniqBy` without support for iteratee
- * shorthands.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- */
- function baseSortedUniqBy(array, iteratee) {
- var index = 0,
- length = array.length,
- value = array[0],
- computed = iteratee ? iteratee(value) : value,
- seen = computed,
- resIndex = 1,
- result = [value];
-
- while (++index < length) {
- value = array[index],
- computed = iteratee ? iteratee(value) : value;
-
- if (!eq(computed, seen)) {
- seen = computed;
- result[resIndex++] = value;
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `_.uniqBy` without support for iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- */
- function baseUniq(array, iteratee, comparator) {
- var index = -1,
- includes = arrayIncludes,
- length = array.length,
- isCommon = true,
- result = [],
- seen = result;
-
- if (comparator) {
- isCommon = false;
- includes = arrayIncludesWith;
- }
- else if (length >= LARGE_ARRAY_SIZE) {
- var set = iteratee ? null : createSet(array);
- if (set) {
- return setToArray(set);
- }
- isCommon = false;
- includes = cacheHas;
- seen = new SetCache;
- }
- else {
- seen = iteratee ? [] : result;
- }
- outer:
- while (++index < length) {
- var value = array[index],
- computed = iteratee ? iteratee(value) : value;
-
- if (isCommon && computed === computed) {
- var seenIndex = seen.length;
- while (seenIndex--) {
- if (seen[seenIndex] === computed) {
- continue outer;
- }
- }
- if (iteratee) {
- seen.push(computed);
- }
- result.push(value);
- }
- else if (!includes(seen, computed, comparator)) {
- if (seen !== result) {
- seen.push(computed);
- }
- result.push(value);
- }
- }
- return result;
- }
-
- /**
- * The base implementation of `_.unset`.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to unset.
- * @returns {boolean} Returns `true` if the property is deleted, else `false`.
- */
- function baseUnset(object, path) {
- path = isKey(path, object) ? [path + ''] : baseCastPath(path);
- object = parent(object, path);
- var key = last(path);
- return (object != null && has(object, key)) ? delete object[key] : true;
- }
-
- /**
- * The base implementation of `_.update`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the property to update.
- * @param {Function} updater The function to produce the updated value.
- * @param {Function} [customizer] The function to customize path creation.
- * @returns {Object} Returns `object`.
- */
- function baseUpdate(object, path, updater, customizer) {
- return baseSet(object, path, updater(baseGet(object, path)), customizer);
- }
-
- /**
- * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
- * without support for iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to query.
- * @param {Function} predicate The function invoked per iteration.
- * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Array} Returns the slice of `array`.
- */
- function baseWhile(array, predicate, isDrop, fromRight) {
- var length = array.length,
- index = fromRight ? length : -1;
-
- while ((fromRight ? index-- : ++index < length) &&
- predicate(array[index], index, array)) {}
-
- return isDrop
- ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
- : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
- }
-
- /**
- * The base implementation of `wrapperValue` which returns the result of
- * performing a sequence of actions on the unwrapped `value`, where each
- * successive action is supplied the return value of the previous.
- *
- * @private
- * @param {*} value The unwrapped value.
- * @param {Array} actions Actions to perform to resolve the unwrapped value.
- * @returns {*} Returns the resolved value.
- */
- function baseWrapperValue(value, actions) {
- var result = value;
- if (result instanceof LazyWrapper) {
- result = result.value();
- }
- return arrayReduce(actions, function(result, action) {
- return action.func.apply(action.thisArg, arrayPush([result], action.args));
- }, result);
- }
-
- /**
- * The base implementation of methods like `_.xor`, without support for
- * iteratee shorthands, that accepts an array of arrays to inspect.
- *
- * @private
- * @param {Array} arrays The arrays to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of values.
- */
- function baseXor(arrays, iteratee, comparator) {
- var index = -1,
- length = arrays.length;
-
- while (++index < length) {
- var result = result
- ? arrayPush(
- baseDifference(result, arrays[index], iteratee, comparator),
- baseDifference(arrays[index], result, iteratee, comparator)
- )
- : arrays[index];
- }
- return (result && result.length) ? baseUniq(result, iteratee, comparator) : [];
- }
-
- /**
- * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
- *
- * @private
- * @param {Array} props The property names.
- * @param {Array} values The property values.
- * @param {Function} assignFunc The function to assign values.
- * @returns {Object} Returns the new object.
- */
- function baseZipObject(props, values, assignFunc) {
- var index = -1,
- length = props.length,
- valsLength = values.length,
- result = {};
-
- while (++index < length) {
- assignFunc(result, props[index], index < valsLength ? values[index] : undefined);
- }
- return result;
- }
-
- /**
- * Creates a clone of `buffer`.
- *
- * @private
- * @param {Buffer} buffer The buffer to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Buffer} Returns the cloned buffer.
- */
- function cloneBuffer(buffer, isDeep) {
- if (isDeep) {
- return buffer.slice();
- }
- var result = new buffer.constructor(buffer.length);
- buffer.copy(result);
- return result;
- }
-
- /**
- * Creates a clone of `arrayBuffer`.
- *
- * @private
- * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
- * @returns {ArrayBuffer} Returns the cloned array buffer.
- */
- function cloneArrayBuffer(arrayBuffer) {
- var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
- new Uint8Array(result).set(new Uint8Array(arrayBuffer));
- return result;
- }
-
- /**
- * Creates a clone of `map`.
- *
- * @private
- * @param {Object} map The map to clone.
- * @returns {Object} Returns the cloned map.
- */
- function cloneMap(map) {
- return arrayReduce(mapToArray(map), addMapEntry, new map.constructor);
- }
-
- /**
- * Creates a clone of `regexp`.
- *
- * @private
- * @param {Object} regexp The regexp to clone.
- * @returns {Object} Returns the cloned regexp.
- */
- function cloneRegExp(regexp) {
- var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
- result.lastIndex = regexp.lastIndex;
- return result;
- }
-
- /**
- * Creates a clone of `set`.
- *
- * @private
- * @param {Object} set The set to clone.
- * @returns {Object} Returns the cloned set.
- */
- function cloneSet(set) {
- return arrayReduce(setToArray(set), addSetEntry, new set.constructor);
- }
-
- /**
- * Creates a clone of the `symbol` object.
- *
- * @private
- * @param {Object} symbol The symbol object to clone.
- * @returns {Object} Returns the cloned symbol object.
- */
- function cloneSymbol(symbol) {
- return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
- }
-
- /**
- * Creates a clone of `typedArray`.
- *
- * @private
- * @param {Object} typedArray The typed array to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the cloned typed array.
- */
- function cloneTypedArray(typedArray, isDeep) {
- var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
- return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
- }
-
- /**
- * Creates an array that is the composition of partially applied arguments,
- * placeholders, and provided arguments into a single array of arguments.
- *
- * @private
- * @param {Array|Object} args The provided arguments.
- * @param {Array} partials The arguments to prepend to those provided.
- * @param {Array} holders The `partials` placeholder indexes.
- * @params {boolean} [isCurried] Specify composing for a curried function.
- * @returns {Array} Returns the new array of composed arguments.
- */
- function composeArgs(args, partials, holders, isCurried) {
- var argsIndex = -1,
- argsLength = args.length,
- holdersLength = holders.length,
- leftIndex = -1,
- leftLength = partials.length,
- rangeLength = nativeMax(argsLength - holdersLength, 0),
- result = Array(leftLength + rangeLength),
- isUncurried = !isCurried;
-
- while (++leftIndex < leftLength) {
- result[leftIndex] = partials[leftIndex];
- }
- while (++argsIndex < holdersLength) {
- if (isUncurried || argsIndex < argsLength) {
- result[holders[argsIndex]] = args[argsIndex];
- }
- }
- while (rangeLength--) {
- result[leftIndex++] = args[argsIndex++];
- }
- return result;
- }
-
- /**
- * This function is like `composeArgs` except that the arguments composition
- * is tailored for `_.partialRight`.
- *
- * @private
- * @param {Array|Object} args The provided arguments.
- * @param {Array} partials The arguments to append to those provided.
- * @param {Array} holders The `partials` placeholder indexes.
- * @params {boolean} [isCurried] Specify composing for a curried function.
- * @returns {Array} Returns the new array of composed arguments.
- */
- function composeArgsRight(args, partials, holders, isCurried) {
- var argsIndex = -1,
- argsLength = args.length,
- holdersIndex = -1,
- holdersLength = holders.length,
- rightIndex = -1,
- rightLength = partials.length,
- rangeLength = nativeMax(argsLength - holdersLength, 0),
- result = Array(rangeLength + rightLength),
- isUncurried = !isCurried;
-
- while (++argsIndex < rangeLength) {
- result[argsIndex] = args[argsIndex];
- }
- var offset = argsIndex;
- while (++rightIndex < rightLength) {
- result[offset + rightIndex] = partials[rightIndex];
- }
- while (++holdersIndex < holdersLength) {
- if (isUncurried || argsIndex < argsLength) {
- result[offset + holders[holdersIndex]] = args[argsIndex++];
- }
- }
- return result;
- }
-
- /**
- * Copies the values of `source` to `array`.
- *
- * @private
- * @param {Array} source The array to copy values from.
- * @param {Array} [array=[]] The array to copy values to.
- * @returns {Array} Returns `array`.
- */
- function copyArray(source, array) {
- var index = -1,
- length = source.length;
-
- array || (array = Array(length));
- while (++index < length) {
- array[index] = source[index];
- }
- return array;
- }
-
- /**
- * Copies properties of `source` to `object`.
- *
- * @private
- * @param {Object} source The object to copy properties from.
- * @param {Array} props The property names to copy.
- * @param {Object} [object={}] The object to copy properties to.
- * @returns {Object} Returns `object`.
- */
- function copyObject(source, props, object) {
- return copyObjectWith(source, props, object);
- }
-
- /**
- * This function is like `copyObject` except that it accepts a function to
- * customize copied values.
- *
- * @private
- * @param {Object} source The object to copy properties from.
- * @param {Array} props The property names to copy.
- * @param {Object} [object={}] The object to copy properties to.
- * @param {Function} [customizer] The function to customize copied values.
- * @returns {Object} Returns `object`.
- */
- function copyObjectWith(source, props, object, customizer) {
- object || (object = {});
-
- var index = -1,
- length = props.length;
-
- while (++index < length) {
- var key = props[index];
-
- var newValue = customizer
- ? customizer(object[key], source[key], key, object, source)
- : source[key];
-
- assignValue(object, key, newValue);
- }
- return object;
- }
-
- /**
- * Copies own symbol properties of `source` to `object`.
- *
- * @private
- * @param {Object} source The object to copy symbols from.
- * @param {Object} [object={}] The object to copy symbols to.
- * @returns {Object} Returns `object`.
- */
- function copySymbols(source, object) {
- return copyObject(source, getSymbols(source), object);
- }
-
- /**
- * Creates a function like `_.groupBy`.
- *
- * @private
- * @param {Function} setter The function to set accumulator values.
- * @param {Function} [initializer] The accumulator object initializer.
- * @returns {Function} Returns the new aggregator function.
- */
- function createAggregator(setter, initializer) {
- return function(collection, iteratee) {
- var func = isArray(collection) ? arrayAggregator : baseAggregator,
- accumulator = initializer ? initializer() : {};
-
- return func(collection, setter, getIteratee(iteratee), accumulator);
- };
- }
-
- /**
- * Creates a function like `_.assign`.
- *
- * @private
- * @param {Function} assigner The function to assign values.
- * @returns {Function} Returns the new assigner function.
- */
- function createAssigner(assigner) {
- return rest(function(object, sources) {
- var index = -1,
- length = sources.length,
- customizer = length > 1 ? sources[length - 1] : undefined,
- guard = length > 2 ? sources[2] : undefined;
-
- customizer = typeof customizer == 'function'
- ? (length--, customizer)
- : undefined;
-
- if (guard && isIterateeCall(sources[0], sources[1], guard)) {
- customizer = length < 3 ? undefined : customizer;
- length = 1;
- }
- object = Object(object);
- while (++index < length) {
- var source = sources[index];
- if (source) {
- assigner(object, source, index, customizer);
- }
- }
- return object;
- });
- }
-
- /**
- * Creates a `baseEach` or `baseEachRight` function.
- *
- * @private
- * @param {Function} eachFunc The function to iterate over a collection.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new base function.
- */
- function createBaseEach(eachFunc, fromRight) {
- return function(collection, iteratee) {
- if (collection == null) {
- return collection;
- }
- if (!isArrayLike(collection)) {
- return eachFunc(collection, iteratee);
- }
- var length = collection.length,
- index = fromRight ? length : -1,
- iterable = Object(collection);
-
- while ((fromRight ? index-- : ++index < length)) {
- if (iteratee(iterable[index], index, iterable) === false) {
- break;
- }
- }
- return collection;
- };
- }
-
- /**
- * Creates a base function for methods like `_.forIn`.
- *
- * @private
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new base function.
- */
- function createBaseFor(fromRight) {
- return function(object, iteratee, keysFunc) {
- var index = -1,
- iterable = Object(object),
- props = keysFunc(object),
- length = props.length;
-
- while (length--) {
- var key = props[fromRight ? length : ++index];
- if (iteratee(iterable[key], key, iterable) === false) {
- break;
- }
- }
- return object;
- };
- }
-
- /**
- * Creates a function that wraps `func` to invoke it with the optional `this`
- * binding of `thisArg`.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
- * @param {*} [thisArg] The `this` binding of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createBaseWrapper(func, bitmask, thisArg) {
- var isBind = bitmask & BIND_FLAG,
- Ctor = createCtorWrapper(func);
-
- function wrapper() {
- var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
- return fn.apply(isBind ? thisArg : this, arguments);
- }
- return wrapper;
- }
-
- /**
- * Creates a function like `_.lowerFirst`.
- *
- * @private
- * @param {string} methodName The name of the `String` case method to use.
- * @returns {Function} Returns the new function.
- */
- function createCaseFirst(methodName) {
- return function(string) {
- string = toString(string);
-
- var strSymbols = reHasComplexSymbol.test(string)
- ? stringToArray(string)
- : undefined;
-
- var chr = strSymbols ? strSymbols[0] : string.charAt(0),
- trailing = strSymbols ? strSymbols.slice(1).join('') : string.slice(1);
-
- return chr[methodName]() + trailing;
- };
- }
-
- /**
- * Creates a function like `_.camelCase`.
- *
- * @private
- * @param {Function} callback The function to combine each word.
- * @returns {Function} Returns the new compounder function.
- */
- function createCompounder(callback) {
- return function(string) {
- return arrayReduce(words(deburr(string)), callback, '');
- };
- }
-
- /**
- * Creates a function that produces an instance of `Ctor` regardless of
- * whether it was invoked as part of a `new` expression or by `call` or `apply`.
- *
- * @private
- * @param {Function} Ctor The constructor to wrap.
- * @returns {Function} Returns the new wrapped function.
- */
- function createCtorWrapper(Ctor) {
- return function() {
- // Use a `switch` statement to work with class constructors.
- // See http://ecma-international.org/ecma-262/6.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
- // for more details.
- var args = arguments;
- switch (args.length) {
- case 0: return new Ctor;
- case 1: return new Ctor(args[0]);
- case 2: return new Ctor(args[0], args[1]);
- case 3: return new Ctor(args[0], args[1], args[2]);
- case 4: return new Ctor(args[0], args[1], args[2], args[3]);
- case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
- case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
- case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
- }
- var thisBinding = baseCreate(Ctor.prototype),
- result = Ctor.apply(thisBinding, args);
-
- // Mimic the constructor's `return` behavior.
- // See https://es5.github.io/#x13.2.2 for more details.
- return isObject(result) ? result : thisBinding;
- };
- }
-
- /**
- * Creates a function that wraps `func` to enable currying.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
- * @param {number} arity The arity of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createCurryWrapper(func, bitmask, arity) {
- var Ctor = createCtorWrapper(func);
-
- function wrapper() {
- var length = arguments.length,
- args = Array(length),
- index = length,
- placeholder = getPlaceholder(wrapper);
-
- while (index--) {
- args[index] = arguments[index];
- }
- var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
- ? []
- : replaceHolders(args, placeholder);
-
- length -= holders.length;
- if (length < arity) {
- return createRecurryWrapper(
- func, bitmask, createHybridWrapper, wrapper.placeholder, undefined,
- args, holders, undefined, undefined, arity - length);
- }
- var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
- return apply(fn, this, args);
- }
- return wrapper;
- }
-
- /**
- * Creates a `_.flow` or `_.flowRight` function.
- *
- * @private
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new flow function.
- */
- function createFlow(fromRight) {
- return rest(function(funcs) {
- funcs = baseFlatten(funcs, 1);
-
- var length = funcs.length,
- index = length,
- prereq = LodashWrapper.prototype.thru;
-
- if (fromRight) {
- funcs.reverse();
- }
- while (index--) {
- var func = funcs[index];
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
- var wrapper = new LodashWrapper([], true);
- }
- }
- index = wrapper ? index : length;
- while (++index < length) {
- func = funcs[index];
-
- var funcName = getFuncName(func),
- data = funcName == 'wrapper' ? getData(func) : undefined;
-
- if (data && isLaziable(data[0]) &&
- data[1] == (ARY_FLAG | CURRY_FLAG | PARTIAL_FLAG | REARG_FLAG) &&
- !data[4].length && data[9] == 1
- ) {
- wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
- } else {
- wrapper = (func.length == 1 && isLaziable(func)) ? wrapper[funcName]() : wrapper.thru(func);
- }
- }
- return function() {
- var args = arguments,
- value = args[0];
-
- if (wrapper && args.length == 1 &&
- isArray(value) && value.length >= LARGE_ARRAY_SIZE) {
- return wrapper.plant(value).value();
- }
- var index = 0,
- result = length ? funcs[index].apply(this, args) : value;
-
- while (++index < length) {
- result = funcs[index].call(this, result);
- }
- return result;
- };
- });
- }
-
- /**
- * Creates a function that wraps `func` to invoke it with optional `this`
- * binding of `thisArg`, partial application, and currying.
- *
- * @private
- * @param {Function|string} func The function or method name to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
- * @param {*} [thisArg] The `this` binding of `func`.
- * @param {Array} [partials] The arguments to prepend to those provided to the new function.
- * @param {Array} [holders] The `partials` placeholder indexes.
- * @param {Array} [partialsRight] The arguments to append to those provided to the new function.
- * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
- * @param {Array} [argPos] The argument positions of the new function.
- * @param {number} [ary] The arity cap of `func`.
- * @param {number} [arity] The arity of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createHybridWrapper(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
- var isAry = bitmask & ARY_FLAG,
- isBind = bitmask & BIND_FLAG,
- isBindKey = bitmask & BIND_KEY_FLAG,
- isCurried = bitmask & (CURRY_FLAG | CURRY_RIGHT_FLAG),
- isFlip = bitmask & FLIP_FLAG,
- Ctor = isBindKey ? undefined : createCtorWrapper(func);
-
- function wrapper() {
- var length = arguments.length,
- index = length,
- args = Array(length);
-
- while (index--) {
- args[index] = arguments[index];
- }
- if (isCurried) {
- var placeholder = getPlaceholder(wrapper),
- holdersCount = countHolders(args, placeholder);
- }
- if (partials) {
- args = composeArgs(args, partials, holders, isCurried);
- }
- if (partialsRight) {
- args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
- }
- length -= holdersCount;
- if (isCurried && length < arity) {
- var newHolders = replaceHolders(args, placeholder);
- return createRecurryWrapper(
- func, bitmask, createHybridWrapper, wrapper.placeholder, thisArg,
- args, newHolders, argPos, ary, arity - length
- );
- }
- var thisBinding = isBind ? thisArg : this,
- fn = isBindKey ? thisBinding[func] : func;
-
- length = args.length;
- if (argPos) {
- args = reorder(args, argPos);
- } else if (isFlip && length > 1) {
- args.reverse();
- }
- if (isAry && ary < length) {
- args.length = ary;
- }
- if (this && this !== root && this instanceof wrapper) {
- fn = Ctor || createCtorWrapper(fn);
- }
- return fn.apply(thisBinding, args);
- }
- return wrapper;
- }
-
- /**
- * Creates a function like `_.invertBy`.
- *
- * @private
- * @param {Function} setter The function to set accumulator values.
- * @param {Function} toIteratee The function to resolve iteratees.
- * @returns {Function} Returns the new inverter function.
- */
- function createInverter(setter, toIteratee) {
- return function(object, iteratee) {
- return baseInverter(object, setter, toIteratee(iteratee), {});
- };
- }
-
- /**
- * Creates a function like `_.over`.
- *
- * @private
- * @param {Function} arrayFunc The function to iterate over iteratees.
- * @returns {Function} Returns the new invoker function.
- */
- function createOver(arrayFunc) {
- return rest(function(iteratees) {
- iteratees = arrayMap(baseFlatten(iteratees, 1), getIteratee());
- return rest(function(args) {
- var thisArg = this;
- return arrayFunc(iteratees, function(iteratee) {
- return apply(iteratee, thisArg, args);
- });
- });
- });
- }
-
- /**
- * Creates the padding for `string` based on `length`. The `chars` string
- * is truncated if the number of characters exceeds `length`.
- *
- * @private
- * @param {string} string The string to create padding for.
- * @param {number} [length=0] The padding length.
- * @param {string} [chars=' '] The string used as padding.
- * @returns {string} Returns the padding for `string`.
- */
- function createPadding(string, length, chars) {
- length = toInteger(length);
-
- var strLength = stringSize(string);
- if (!length || strLength >= length) {
- return '';
- }
- var padLength = length - strLength;
- chars = chars === undefined ? ' ' : (chars + '');
-
- var result = repeat(chars, nativeCeil(padLength / stringSize(chars)));
- return reHasComplexSymbol.test(chars)
- ? stringToArray(result).slice(0, padLength).join('')
- : result.slice(0, padLength);
- }
-
- /**
- * Creates a function that wraps `func` to invoke it with the optional `this`
- * binding of `thisArg` and the `partials` prepended to those provided to
- * the wrapper.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
- * @param {*} thisArg The `this` binding of `func`.
- * @param {Array} partials The arguments to prepend to those provided to the new function.
- * @returns {Function} Returns the new wrapped function.
- */
- function createPartialWrapper(func, bitmask, thisArg, partials) {
- var isBind = bitmask & BIND_FLAG,
- Ctor = createCtorWrapper(func);
-
- function wrapper() {
- var argsIndex = -1,
- argsLength = arguments.length,
- leftIndex = -1,
- leftLength = partials.length,
- args = Array(leftLength + argsLength),
- fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
-
- while (++leftIndex < leftLength) {
- args[leftIndex] = partials[leftIndex];
- }
- while (argsLength--) {
- args[leftIndex++] = arguments[++argsIndex];
- }
- return apply(fn, isBind ? thisArg : this, args);
- }
- return wrapper;
- }
-
- /**
- * Creates a `_.range` or `_.rangeRight` function.
- *
- * @private
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new range function.
- */
- function createRange(fromRight) {
- return function(start, end, step) {
- if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
- end = step = undefined;
- }
- // Ensure the sign of `-0` is preserved.
- start = toNumber(start);
- start = start === start ? start : 0;
- if (end === undefined) {
- end = start;
- start = 0;
- } else {
- end = toNumber(end) || 0;
- }
- step = step === undefined ? (start < end ? 1 : -1) : (toNumber(step) || 0);
- return baseRange(start, end, step, fromRight);
- };
- }
-
- /**
- * Creates a function that wraps `func` to continue currying.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper` for more details.
- * @param {Function} wrapFunc The function to create the `func` wrapper.
- * @param {*} placeholder The placeholder value.
- * @param {*} [thisArg] The `this` binding of `func`.
- * @param {Array} [partials] The arguments to prepend to those provided to the new function.
- * @param {Array} [holders] The `partials` placeholder indexes.
- * @param {Array} [argPos] The argument positions of the new function.
- * @param {number} [ary] The arity cap of `func`.
- * @param {number} [arity] The arity of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createRecurryWrapper(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
- var isCurry = bitmask & CURRY_FLAG,
- newArgPos = argPos ? copyArray(argPos) : undefined,
- newHolders = isCurry ? holders : undefined,
- newHoldersRight = isCurry ? undefined : holders,
- newPartials = isCurry ? partials : undefined,
- newPartialsRight = isCurry ? undefined : partials;
-
- bitmask |= (isCurry ? PARTIAL_FLAG : PARTIAL_RIGHT_FLAG);
- bitmask &= ~(isCurry ? PARTIAL_RIGHT_FLAG : PARTIAL_FLAG);
-
- if (!(bitmask & CURRY_BOUND_FLAG)) {
- bitmask &= ~(BIND_FLAG | BIND_KEY_FLAG);
- }
- var newData = [
- func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
- newHoldersRight, newArgPos, ary, arity
- ];
-
- var result = wrapFunc.apply(undefined, newData);
- if (isLaziable(func)) {
- setData(result, newData);
- }
- result.placeholder = placeholder;
- return result;
- }
-
- /**
- * Creates a function like `_.round`.
- *
- * @private
- * @param {string} methodName The name of the `Math` method to use when rounding.
- * @returns {Function} Returns the new round function.
- */
- function createRound(methodName) {
- var func = Math[methodName];
- return function(number, precision) {
- number = toNumber(number);
- precision = toInteger(precision);
- if (precision) {
- // Shift with exponential notation to avoid floating-point issues.
- // See [MDN](https://mdn.io/round#Examples) for more details.
- var pair = (toString(number) + 'e').split('e'),
- value = func(pair[0] + 'e' + (+pair[1] + precision));
-
- pair = (toString(value) + 'e').split('e');
- return +(pair[0] + 'e' + (+pair[1] - precision));
- }
- return func(number);
- };
- }
-
- /**
- * Creates a set of `values`.
- *
- * @private
- * @param {Array} values The values to add to the set.
- * @returns {Object} Returns the new set.
- */
- var createSet = !(Set && new Set([1, 2]).size === 2) ? noop : function(values) {
- return new Set(values);
- };
-
- /**
- * Creates a function that either curries or invokes `func` with optional
- * `this` binding and partially applied arguments.
- *
- * @private
- * @param {Function|string} func The function or method name to wrap.
- * @param {number} bitmask The bitmask of wrapper flags.
- * The bitmask may be composed of the following flags:
- * 1 - `_.bind`
- * 2 - `_.bindKey`
- * 4 - `_.curry` or `_.curryRight` of a bound function
- * 8 - `_.curry`
- * 16 - `_.curryRight`
- * 32 - `_.partial`
- * 64 - `_.partialRight`
- * 128 - `_.rearg`
- * 256 - `_.ary`
- * @param {*} [thisArg] The `this` binding of `func`.
- * @param {Array} [partials] The arguments to be partially applied.
- * @param {Array} [holders] The `partials` placeholder indexes.
- * @param {Array} [argPos] The argument positions of the new function.
- * @param {number} [ary] The arity cap of `func`.
- * @param {number} [arity] The arity of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createWrapper(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
- var isBindKey = bitmask & BIND_KEY_FLAG;
- if (!isBindKey && typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- var length = partials ? partials.length : 0;
- if (!length) {
- bitmask &= ~(PARTIAL_FLAG | PARTIAL_RIGHT_FLAG);
- partials = holders = undefined;
- }
- ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
- arity = arity === undefined ? arity : toInteger(arity);
- length -= holders ? holders.length : 0;
-
- if (bitmask & PARTIAL_RIGHT_FLAG) {
- var partialsRight = partials,
- holdersRight = holders;
-
- partials = holders = undefined;
- }
- var data = isBindKey ? undefined : getData(func);
-
- var newData = [
- func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
- argPos, ary, arity
- ];
-
- if (data) {
- mergeData(newData, data);
- }
- func = newData[0];
- bitmask = newData[1];
- thisArg = newData[2];
- partials = newData[3];
- holders = newData[4];
- arity = newData[9] = newData[9] == null
- ? (isBindKey ? 0 : func.length)
- : nativeMax(newData[9] - length, 0);
-
- if (!arity && bitmask & (CURRY_FLAG | CURRY_RIGHT_FLAG)) {
- bitmask &= ~(CURRY_FLAG | CURRY_RIGHT_FLAG);
- }
- if (!bitmask || bitmask == BIND_FLAG) {
- var result = createBaseWrapper(func, bitmask, thisArg);
- } else if (bitmask == CURRY_FLAG || bitmask == CURRY_RIGHT_FLAG) {
- result = createCurryWrapper(func, bitmask, arity);
- } else if ((bitmask == PARTIAL_FLAG || bitmask == (BIND_FLAG | PARTIAL_FLAG)) && !holders.length) {
- result = createPartialWrapper(func, bitmask, thisArg, partials);
- } else {
- result = createHybridWrapper.apply(undefined, newData);
- }
- var setter = data ? baseSetData : setData;
- return setter(result, newData);
- }
-
- /**
- * A specialized version of `baseIsEqualDeep` for arrays with support for
- * partial deep comparisons.
- *
- * @private
- * @param {Array} array The array to compare.
- * @param {Array} other The other array to compare.
- * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Function} customizer The function to customize comparisons.
- * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual` for more details.
- * @param {Object} stack Tracks traversed `array` and `other` objects.
- * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
- */
- function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
- var index = -1,
- isPartial = bitmask & PARTIAL_COMPARE_FLAG,
- isUnordered = bitmask & UNORDERED_COMPARE_FLAG,
- arrLength = array.length,
- othLength = other.length;
-
- if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
- return false;
- }
- // Assume cyclic values are equal.
- var stacked = stack.get(array);
- if (stacked) {
- return stacked == other;
- }
- var result = true;
- stack.set(array, other);
-
- // Ignore non-index properties.
- while (++index < arrLength) {
- var arrValue = array[index],
- othValue = other[index];
-
- if (customizer) {
- var compared = isPartial
- ? customizer(othValue, arrValue, index, other, array, stack)
- : customizer(arrValue, othValue, index, array, other, stack);
- }
- if (compared !== undefined) {
- if (compared) {
- continue;
- }
- result = false;
- break;
- }
- // Recursively compare arrays (susceptible to call stack limits).
- if (isUnordered) {
- if (!arraySome(other, function(othValue) {
- return arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack);
- })) {
- result = false;
- break;
- }
- } else if (!(arrValue === othValue || equalFunc(arrValue, othValue, customizer, bitmask, stack))) {
- result = false;
- break;
- }
- }
- stack['delete'](array);
- return result;
- }
-
- /**
- * A specialized version of `baseIsEqualDeep` for comparing objects of
- * the same `toStringTag`.
- *
- * **Note:** This function only supports comparing values with tags of
- * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
- *
- * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @param {string} tag The `toStringTag` of the objects to compare.
- * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Function} customizer The function to customize comparisons.
- * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual` for more details.
- * @param {Object} stack Tracks traversed `object` and `other` objects.
- * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
- */
- function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
- switch (tag) {
- case arrayBufferTag:
- if ((object.byteLength != other.byteLength) ||
- !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
- return false;
- }
- return true;
-
- case boolTag:
- case dateTag:
- // Coerce dates and booleans to numbers, dates to milliseconds and booleans
- // to `1` or `0` treating invalid dates coerced to `NaN` as not equal.
- return +object == +other;
-
- case errorTag:
- return object.name == other.name && object.message == other.message;
-
- case numberTag:
- // Treat `NaN` vs. `NaN` as equal.
- return (object != +object) ? other != +other : object == +other;
-
- case regexpTag:
- case stringTag:
- // Coerce regexes to strings and treat strings primitives and string
- // objects as equal. See https://es5.github.io/#x15.10.6.4 for more details.
- return object == (other + '');
-
- case mapTag:
- var convert = mapToArray;
-
- case setTag:
- var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
- convert || (convert = setToArray);
-
- if (object.size != other.size && !isPartial) {
- return false;
- }
- // Assume cyclic values are equal.
- var stacked = stack.get(object);
- if (stacked) {
- return stacked == other;
- }
- // Recursively compare objects (susceptible to call stack limits).
- return equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask | UNORDERED_COMPARE_FLAG, stack.set(object, other));
-
- case symbolTag:
- if (symbolValueOf) {
- return symbolValueOf.call(object) == symbolValueOf.call(other);
- }
- }
- return false;
- }
-
- /**
- * A specialized version of `baseIsEqualDeep` for objects with support for
- * partial deep comparisons.
- *
- * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Function} customizer The function to customize comparisons.
- * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual` for more details.
- * @param {Object} stack Tracks traversed `object` and `other` objects.
- * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
- */
- function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
- var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
- objProps = keys(object),
- objLength = objProps.length,
- othProps = keys(other),
- othLength = othProps.length;
-
- if (objLength != othLength && !isPartial) {
- return false;
- }
- var index = objLength;
- while (index--) {
- var key = objProps[index];
- if (!(isPartial ? key in other : baseHas(other, key))) {
- return false;
- }
- }
- // Assume cyclic values are equal.
- var stacked = stack.get(object);
- if (stacked) {
- return stacked == other;
- }
- var result = true;
- stack.set(object, other);
-
- var skipCtor = isPartial;
- while (++index < objLength) {
- key = objProps[index];
- var objValue = object[key],
- othValue = other[key];
-
- if (customizer) {
- var compared = isPartial
- ? customizer(othValue, objValue, key, other, object, stack)
- : customizer(objValue, othValue, key, object, other, stack);
- }
- // Recursively compare objects (susceptible to call stack limits).
- if (!(compared === undefined
- ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
- : compared
- )) {
- result = false;
- break;
- }
- skipCtor || (skipCtor = key == 'constructor');
- }
- if (result && !skipCtor) {
- var objCtor = object.constructor,
- othCtor = other.constructor;
-
- // Non `Object` object instances with different constructors are not equal.
- if (objCtor != othCtor &&
- ('constructor' in object && 'constructor' in other) &&
- !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
- typeof othCtor == 'function' && othCtor instanceof othCtor)) {
- result = false;
- }
- }
- stack['delete'](object);
- return result;
- }
-
- /**
- * Gets metadata for `func`.
- *
- * @private
- * @param {Function} func The function to query.
- * @returns {*} Returns the metadata for `func`.
- */
- var getData = !metaMap ? noop : function(func) {
- return metaMap.get(func);
- };
-
- /**
- * Gets the name of `func`.
- *
- * @private
- * @param {Function} func The function to query.
- * @returns {string} Returns the function name.
- */
- function getFuncName(func) {
- var result = (func.name + ''),
- array = realNames[result],
- length = hasOwnProperty.call(realNames, result) ? array.length : 0;
-
- while (length--) {
- var data = array[length],
- otherFunc = data.func;
- if (otherFunc == null || otherFunc == func) {
- return data.name;
- }
- }
- return result;
- }
-
- /**
- * Gets the appropriate "iteratee" function. If the `_.iteratee` method is
- * customized this function returns the custom method, otherwise it returns
- * `baseIteratee`. If arguments are provided the chosen function is invoked
- * with them and its result is returned.
- *
- * @private
- * @param {*} [value] The value to convert to an iteratee.
- * @param {number} [arity] The arity of the created iteratee.
- * @returns {Function} Returns the chosen function or its result.
- */
- function getIteratee() {
- var result = lodash.iteratee || iteratee;
- result = result === iteratee ? baseIteratee : result;
- return arguments.length ? result(arguments[0], arguments[1]) : result;
- }
-
- /**
- * Gets the "length" property value of `object`.
- *
- * **Note:** This function is used to avoid a [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792)
- * that affects Safari on at least iOS 8.1-8.3 ARM64.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {*} Returns the "length" value.
- */
- var getLength = baseProperty('length');
-
- /**
- * Gets the property names, values, and compare flags of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the match data of `object`.
- */
- function getMatchData(object) {
- var result = toPairs(object),
- length = result.length;
-
- while (length--) {
- result[length][2] = isStrictComparable(result[length][1]);
- }
- return result;
- }
-
- /**
- * Gets the native function at `key` of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {string} key The key of the method to get.
- * @returns {*} Returns the function if it's native, else `undefined`.
- */
- function getNative(object, key) {
- var value = object[key];
- return isNative(value) ? value : undefined;
- }
-
- /**
- * Gets the argument placeholder value for `func`.
- *
- * @private
- * @param {Function} func The function to inspect.
- * @returns {*} Returns the placeholder value.
- */
- function getPlaceholder(func) {
- var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
- return object.placeholder;
- }
-
- /**
- * Creates an array of the own symbol properties of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of symbols.
- */
- var getSymbols = getOwnPropertySymbols || function() {
- return [];
- };
-
- /**
- * Gets the `toStringTag` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {string} Returns the `toStringTag`.
- */
- function getTag(value) {
- return objectToString.call(value);
- }
-
- // Fallback for IE 11 providing `toStringTag` values for maps, sets, and weakmaps.
- if ((Map && getTag(new Map) != mapTag) ||
- (Set && getTag(new Set) != setTag) ||
- (WeakMap && getTag(new WeakMap) != weakMapTag)) {
- getTag = function(value) {
- var result = objectToString.call(value),
- Ctor = result == objectTag ? value.constructor : null,
- ctorString = typeof Ctor == 'function' ? funcToString.call(Ctor) : '';
-
- if (ctorString) {
- switch (ctorString) {
- case mapCtorString: return mapTag;
- case setCtorString: return setTag;
- case weakMapCtorString: return weakMapTag;
- }
- }
- return result;
- };
- }
-
- /**
- * Gets the view, applying any `transforms` to the `start` and `end` positions.
- *
- * @private
- * @param {number} start The start of the view.
- * @param {number} end The end of the view.
- * @param {Array} transforms The transformations to apply to the view.
- * @returns {Object} Returns an object containing the `start` and `end`
- * positions of the view.
- */
- function getView(start, end, transforms) {
- var index = -1,
- length = transforms.length;
-
- while (++index < length) {
- var data = transforms[index],
- size = data.size;
-
- switch (data.type) {
- case 'drop': start += size; break;
- case 'dropRight': end -= size; break;
- case 'take': end = nativeMin(end, start + size); break;
- case 'takeRight': start = nativeMax(start, end - size); break;
- }
- }
- return { 'start': start, 'end': end };
- }
-
- /**
- * Checks if `path` exists on `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} path The path to check.
- * @param {Function} hasFunc The function to check properties.
- * @returns {boolean} Returns `true` if `path` exists, else `false`.
- */
- function hasPath(object, path, hasFunc) {
- if (object == null) {
- return false;
- }
- var result = hasFunc(object, path);
- if (!result && !isKey(path)) {
- path = baseCastPath(path);
- object = parent(object, path);
- if (object != null) {
- path = last(path);
- result = hasFunc(object, path);
- }
- }
- var length = object ? object.length : undefined;
- return result || (
- !!length && isLength(length) && isIndex(path, length) &&
- (isArray(object) || isString(object) || isArguments(object))
- );
- }
-
- /**
- * Initializes an array clone.
- *
- * @private
- * @param {Array} array The array to clone.
- * @returns {Array} Returns the initialized clone.
- */
- function initCloneArray(array) {
- var length = array.length,
- result = array.constructor(length);
-
- // Add properties assigned by `RegExp#exec`.
- if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
- result.index = array.index;
- result.input = array.input;
- }
- return result;
- }
-
- /**
- * Initializes an object clone.
- *
- * @private
- * @param {Object} object The object to clone.
- * @returns {Object} Returns the initialized clone.
- */
- function initCloneObject(object) {
- return (typeof object.constructor == 'function' && !isPrototype(object))
- ? baseCreate(getPrototypeOf(object))
- : {};
- }
-
- /**
- * Initializes an object clone based on its `toStringTag`.
- *
- * **Note:** This function only supports cloning values with tags of
- * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
- *
- * @private
- * @param {Object} object The object to clone.
- * @param {string} tag The `toStringTag` of the object to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the initialized clone.
- */
- function initCloneByTag(object, tag, isDeep) {
- var Ctor = object.constructor;
- switch (tag) {
- case arrayBufferTag:
- return cloneArrayBuffer(object);
-
- case boolTag:
- case dateTag:
- return new Ctor(+object);
-
- case float32Tag: case float64Tag:
- case int8Tag: case int16Tag: case int32Tag:
- case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
- return cloneTypedArray(object, isDeep);
-
- case mapTag:
- return cloneMap(object);
-
- case numberTag:
- case stringTag:
- return new Ctor(object);
-
- case regexpTag:
- return cloneRegExp(object);
-
- case setTag:
- return cloneSet(object);
-
- case symbolTag:
- return cloneSymbol(object);
- }
- }
-
- /**
- * Creates an array of index keys for `object` values of arrays,
- * `arguments` objects, and strings, otherwise `null` is returned.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array|null} Returns index keys, else `null`.
- */
- function indexKeys(object) {
- var length = object ? object.length : undefined;
- if (isLength(length) &&
- (isArray(object) || isString(object) || isArguments(object))) {
- return baseTimes(length, String);
- }
- return null;
- }
-
- /**
- * Checks if the given arguments are from an iteratee call.
- *
- * @private
- * @param {*} value The potential iteratee value argument.
- * @param {*} index The potential iteratee index or key argument.
- * @param {*} object The potential iteratee object argument.
- * @returns {boolean} Returns `true` if the arguments are from an iteratee call, else `false`.
- */
- function isIterateeCall(value, index, object) {
- if (!isObject(object)) {
- return false;
- }
- var type = typeof index;
- if (type == 'number'
- ? (isArrayLike(object) && isIndex(index, object.length))
- : (type == 'string' && index in object)) {
- return eq(object[index], value);
- }
- return false;
- }
-
- /**
- * Checks if `value` is a property name and not a property path.
- *
- * @private
- * @param {*} value The value to check.
- * @param {Object} [object] The object to query keys on.
- * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
- */
- function isKey(value, object) {
- if (typeof value == 'number') {
- return true;
- }
- return !isArray(value) &&
- (reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
- (object != null && value in Object(object)));
- }
-
- /**
- * Checks if `value` is suitable for use as unique object key.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
- */
- function isKeyable(value) {
- var type = typeof value;
- return type == 'number' || type == 'boolean' ||
- (type == 'string' && value != '__proto__') || value == null;
- }
-
- /**
- * Checks if `func` has a lazy counterpart.
- *
- * @private
- * @param {Function} func The function to check.
- * @returns {boolean} Returns `true` if `func` has a lazy counterpart, else `false`.
- */
- function isLaziable(func) {
- var funcName = getFuncName(func),
- other = lodash[funcName];
-
- if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
- return false;
- }
- if (func === other) {
- return true;
- }
- var data = getData(other);
- return !!data && func === data[0];
- }
-
- /**
- * Checks if `value` is likely a prototype object.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
- */
- function isPrototype(value) {
- var Ctor = value && value.constructor,
- proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
-
- return value === proto;
- }
-
- /**
- * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` if suitable for strict
- * equality comparisons, else `false`.
- */
- function isStrictComparable(value) {
- return value === value && !isObject(value);
- }
-
- /**
- * Merges the function metadata of `source` into `data`.
- *
- * Merging metadata reduces the number of wrappers used to invoke a function.
- * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
- * may be applied regardless of execution order. Methods like `_.ary` and `_.rearg`
- * modify function arguments, making the order in which they are executed important,
- * preventing the merging of metadata. However, we make an exception for a safe
- * combined case where curried functions have `_.ary` and or `_.rearg` applied.
- *
- * @private
- * @param {Array} data The destination metadata.
- * @param {Array} source The source metadata.
- * @returns {Array} Returns `data`.
- */
- function mergeData(data, source) {
- var bitmask = data[1],
- srcBitmask = source[1],
- newBitmask = bitmask | srcBitmask,
- isCommon = newBitmask < (BIND_FLAG | BIND_KEY_FLAG | ARY_FLAG);
-
- var isCombo =
- ((srcBitmask == ARY_FLAG) && (bitmask == CURRY_FLAG)) ||
- ((srcBitmask == ARY_FLAG) && (bitmask == REARG_FLAG) && (data[7].length <= source[8])) ||
- ((srcBitmask == (ARY_FLAG | REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == CURRY_FLAG));
-
- // Exit early if metadata can't be merged.
- if (!(isCommon || isCombo)) {
- return data;
- }
- // Use source `thisArg` if available.
- if (srcBitmask & BIND_FLAG) {
- data[2] = source[2];
- // Set when currying a bound function.
- newBitmask |= bitmask & BIND_FLAG ? 0 : CURRY_BOUND_FLAG;
- }
- // Compose partial arguments.
- var value = source[3];
- if (value) {
- var partials = data[3];
- data[3] = partials ? composeArgs(partials, value, source[4]) : copyArray(value);
- data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : copyArray(source[4]);
- }
- // Compose partial right arguments.
- value = source[5];
- if (value) {
- partials = data[5];
- data[5] = partials ? composeArgsRight(partials, value, source[6]) : copyArray(value);
- data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : copyArray(source[6]);
- }
- // Use source `argPos` if available.
- value = source[7];
- if (value) {
- data[7] = copyArray(value);
- }
- // Use source `ary` if it's smaller.
- if (srcBitmask & ARY_FLAG) {
- data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
- }
- // Use source `arity` if one is not provided.
- if (data[9] == null) {
- data[9] = source[9];
- }
- // Use source `func` and merge bitmasks.
- data[0] = source[0];
- data[1] = newBitmask;
-
- return data;
- }
-
- /**
- * Used by `_.defaultsDeep` to customize its `_.merge` use.
- *
- * @private
- * @param {*} objValue The destination value.
- * @param {*} srcValue The source value.
- * @param {string} key The key of the property to merge.
- * @param {Object} object The parent object of `objValue`.
- * @param {Object} source The parent object of `srcValue`.
- * @param {Object} [stack] Tracks traversed source values and their merged counterparts.
- * @returns {*} Returns the value to assign.
- */
- function mergeDefaults(objValue, srcValue, key, object, source, stack) {
- if (isObject(objValue) && isObject(srcValue)) {
- baseMerge(objValue, srcValue, undefined, mergeDefaults, stack.set(srcValue, objValue));
- }
- return objValue;
- }
-
- /**
- * Gets the parent value at `path` of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array} path The path to get the parent value of.
- * @returns {*} Returns the parent value.
- */
- function parent(object, path) {
- return path.length == 1 ? object : get(object, baseSlice(path, 0, -1));
- }
-
- /**
- * Reorder `array` according to the specified indexes where the element at
- * the first index is assigned as the first element, the element at
- * the second index is assigned as the second element, and so on.
- *
- * @private
- * @param {Array} array The array to reorder.
- * @param {Array} indexes The arranged array indexes.
- * @returns {Array} Returns `array`.
- */
- function reorder(array, indexes) {
- var arrLength = array.length,
- length = nativeMin(indexes.length, arrLength),
- oldArray = copyArray(array);
-
- while (length--) {
- var index = indexes[length];
- array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
- }
- return array;
- }
-
- /**
- * Sets metadata for `func`.
- *
- * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
- * period of time, it will trip its breaker and transition to an identity function
- * to avoid garbage collection pauses in V8. See [V8 issue 2070](https://code.google.com/p/v8/issues/detail?id=2070)
- * for more details.
- *
- * @private
- * @param {Function} func The function to associate metadata with.
- * @param {*} data The metadata.
- * @returns {Function} Returns `func`.
- */
- var setData = (function() {
- var count = 0,
- lastCalled = 0;
-
- return function(key, value) {
- var stamp = now(),
- remaining = HOT_SPAN - (stamp - lastCalled);
-
- lastCalled = stamp;
- if (remaining > 0) {
- if (++count >= HOT_COUNT) {
- return key;
- }
- } else {
- count = 0;
- }
- return baseSetData(key, value);
- };
- }());
-
- /**
- * Converts `string` to a property path array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the property path array.
- */
- function stringToPath(string) {
- var result = [];
- toString(string).replace(rePropName, function(match, number, quote, string) {
- result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
- });
- return result;
- }
-
- /**
- * Creates a clone of `wrapper`.
- *
- * @private
- * @param {Object} wrapper The wrapper to clone.
- * @returns {Object} Returns the cloned wrapper.
- */
- function wrapperClone(wrapper) {
- if (wrapper instanceof LazyWrapper) {
- return wrapper.clone();
- }
- var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
- result.__actions__ = copyArray(wrapper.__actions__);
- result.__index__ = wrapper.__index__;
- result.__values__ = wrapper.__values__;
- return result;
- }
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates an array of elements split into groups the length of `size`.
- * If `array` can't be split evenly, the final chunk will be the remaining
- * elements.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to process.
- * @param {number} [size=0] The length of each chunk.
- * @returns {Array} Returns the new array containing chunks.
- * @example
- *
- * _.chunk(['a', 'b', 'c', 'd'], 2);
- * // => [['a', 'b'], ['c', 'd']]
- *
- * _.chunk(['a', 'b', 'c', 'd'], 3);
- * // => [['a', 'b', 'c'], ['d']]
- */
- function chunk(array, size) {
- size = nativeMax(toInteger(size), 0);
-
- var length = array ? array.length : 0;
- if (!length || size < 1) {
- return [];
- }
- var index = 0,
- resIndex = 0,
- result = Array(nativeCeil(length / size));
-
- while (index < length) {
- result[resIndex++] = baseSlice(array, index, (index += size));
- }
- return result;
- }
-
- /**
- * Creates an array with all falsey values removed. The values `false`, `null`,
- * `0`, `""`, `undefined`, and `NaN` are falsey.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to compact.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * _.compact([0, 1, false, 2, '', 3]);
- * // => [1, 2, 3]
- */
- function compact(array) {
- var index = -1,
- length = array ? array.length : 0,
- resIndex = 0,
- result = [];
-
- while (++index < length) {
- var value = array[index];
- if (value) {
- result[resIndex++] = value;
- }
- }
- return result;
- }
-
- /**
- * Creates a new array concatenating `array` with any additional arrays
- * and/or values.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to concatenate.
- * @param {...*} [values] The values to concatenate.
- * @returns {Array} Returns the new concatenated array.
- * @example
- *
- * var array = [1];
- * var other = _.concat(array, 2, [3], [[4]]);
- *
- * console.log(other);
- * // => [1, 2, 3, [4]]
- *
- * console.log(array);
- * // => [1]
- */
- var concat = rest(function(array, values) {
- if (!isArray(array)) {
- array = array == null ? [] : [Object(array)];
- }
- values = baseFlatten(values, 1);
- return arrayConcat(array, values);
- });
-
- /**
- * Creates an array of unique `array` values not included in the other
- * given arrays using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
- * for equality comparisons. The order of result values is determined by the
- * order they occur in the first array.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {...Array} [values] The values to exclude.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * _.difference([3, 2, 1], [4, 2]);
- * // => [3, 1]
- */
- var difference = rest(function(array, values) {
- return isArrayLikeObject(array)
- ? baseDifference(array, baseFlatten(values, 1, true))
- : [];
- });
-
- /**
- * This method is like `_.difference` except that it accepts `iteratee` which
- * is invoked for each element of `array` and `values` to generate the criterion
- * by which they're compared. Result values are chosen from the first array.
- * The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {...Array} [values] The values to exclude.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * _.differenceBy([3.1, 2.2, 1.3], [4.4, 2.5], Math.floor);
- * // => [3.1, 1.3]
- *
- * // The `_.property` iteratee shorthand.
- * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
- * // => [{ 'x': 2 }]
- */
- var differenceBy = rest(function(array, values) {
- var iteratee = last(values);
- if (isArrayLikeObject(iteratee)) {
- iteratee = undefined;
- }
- return isArrayLikeObject(array)
- ? baseDifference(array, baseFlatten(values, 1, true), getIteratee(iteratee))
- : [];
- });
-
- /**
- * This method is like `_.difference` except that it accepts `comparator`
- * which is invoked to compare elements of `array` to `values`. Result values
- * are chosen from the first array. The comparator is invoked with two arguments:
- * (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {...Array} [values] The values to exclude.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
- *
- * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
- * // => [{ 'x': 2, 'y': 1 }]
- */
- var differenceWith = rest(function(array, values) {
- var comparator = last(values);
- if (isArrayLikeObject(comparator)) {
- comparator = undefined;
- }
- return isArrayLikeObject(array)
- ? baseDifference(array, baseFlatten(values, 1, true), undefined, comparator)
- : [];
- });
-
- /**
- * Creates a slice of `array` with `n` elements dropped from the beginning.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=1] The number of elements to drop.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.drop([1, 2, 3]);
- * // => [2, 3]
- *
- * _.drop([1, 2, 3], 2);
- * // => [3]
- *
- * _.drop([1, 2, 3], 5);
- * // => []
- *
- * _.drop([1, 2, 3], 0);
- * // => [1, 2, 3]
- */
- function drop(array, n, guard) {
- var length = array ? array.length : 0;
- if (!length) {
- return [];
- }
- n = (guard || n === undefined) ? 1 : toInteger(n);
- return baseSlice(array, n < 0 ? 0 : n, length);
- }
-
- /**
- * Creates a slice of `array` with `n` elements dropped from the end.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=1] The number of elements to drop.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.dropRight([1, 2, 3]);
- * // => [1, 2]
- *
- * _.dropRight([1, 2, 3], 2);
- * // => [1]
- *
- * _.dropRight([1, 2, 3], 5);
- * // => []
- *
- * _.dropRight([1, 2, 3], 0);
- * // => [1, 2, 3]
- */
- function dropRight(array, n, guard) {
- var length = array ? array.length : 0;
- if (!length) {
- return [];
- }
- n = (guard || n === undefined) ? 1 : toInteger(n);
- n = length - n;
- return baseSlice(array, 0, n < 0 ? 0 : n);
- }
-
- /**
- * Creates a slice of `array` excluding elements dropped from the end.
- * Elements are dropped until `predicate` returns falsey. The predicate is
- * invoked with three arguments: (value, index, array).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to query.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': true },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': false }
- * ];
- *
- * _.dropRightWhile(users, function(o) { return !o.active; });
- * // => objects for ['barney']
- *
- * // The `_.matches` iteratee shorthand.
- * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
- * // => objects for ['barney', 'fred']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.dropRightWhile(users, ['active', false]);
- * // => objects for ['barney']
- *
- * // The `_.property` iteratee shorthand.
- * _.dropRightWhile(users, 'active');
- * // => objects for ['barney', 'fred', 'pebbles']
- */
- function dropRightWhile(array, predicate) {
- return (array && array.length)
- ? baseWhile(array, getIteratee(predicate, 3), true, true)
- : [];
- }
-
- /**
- * Creates a slice of `array` excluding elements dropped from the beginning.
- * Elements are dropped until `predicate` returns falsey. The predicate is
- * invoked with three arguments: (value, index, array).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to query.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': false },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': true }
- * ];
- *
- * _.dropWhile(users, function(o) { return !o.active; });
- * // => objects for ['pebbles']
- *
- * // The `_.matches` iteratee shorthand.
- * _.dropWhile(users, { 'user': 'barney', 'active': false });
- * // => objects for ['fred', 'pebbles']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.dropWhile(users, ['active', false]);
- * // => objects for ['pebbles']
- *
- * // The `_.property` iteratee shorthand.
- * _.dropWhile(users, 'active');
- * // => objects for ['barney', 'fred', 'pebbles']
- */
- function dropWhile(array, predicate) {
- return (array && array.length)
- ? baseWhile(array, getIteratee(predicate, 3), true)
- : [];
- }
-
- /**
- * Fills elements of `array` with `value` from `start` up to, but not
- * including, `end`.
- *
- * **Note:** This method mutates `array`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to fill.
- * @param {*} value The value to fill `array` with.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [1, 2, 3];
- *
- * _.fill(array, 'a');
- * console.log(array);
- * // => ['a', 'a', 'a']
- *
- * _.fill(Array(3), 2);
- * // => [2, 2, 2]
- *
- * _.fill([4, 6, 8, 10], '*', 1, 3);
- * // => [4, '*', '*', 10]
- */
- function fill(array, value, start, end) {
- var length = array ? array.length : 0;
- if (!length) {
- return [];
- }
- if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
- start = 0;
- end = length;
- }
- return baseFill(array, value, start, end);
- }
-
- /**
- * This method is like `_.find` except that it returns the index of the first
- * element `predicate` returns truthy for instead of the element itself.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to search.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {number} Returns the index of the found element, else `-1`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': false },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': true }
- * ];
- *
- * _.findIndex(users, function(o) { return o.user == 'barney'; });
- * // => 0
- *
- * // The `_.matches` iteratee shorthand.
- * _.findIndex(users, { 'user': 'fred', 'active': false });
- * // => 1
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.findIndex(users, ['active', false]);
- * // => 0
- *
- * // The `_.property` iteratee shorthand.
- * _.findIndex(users, 'active');
- * // => 2
- */
- function findIndex(array, predicate) {
- return (array && array.length)
- ? baseFindIndex(array, getIteratee(predicate, 3))
- : -1;
- }
-
- /**
- * This method is like `_.findIndex` except that it iterates over elements
- * of `collection` from right to left.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to search.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {number} Returns the index of the found element, else `-1`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': true },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': false }
- * ];
- *
- * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
- * // => 2
- *
- * // The `_.matches` iteratee shorthand.
- * _.findLastIndex(users, { 'user': 'barney', 'active': true });
- * // => 0
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.findLastIndex(users, ['active', false]);
- * // => 2
- *
- * // The `_.property` iteratee shorthand.
- * _.findLastIndex(users, 'active');
- * // => 0
- */
- function findLastIndex(array, predicate) {
- return (array && array.length)
- ? baseFindIndex(array, getIteratee(predicate, 3), true)
- : -1;
- }
-
- /**
- * Flattens `array` a single level deep.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to flatten.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * _.flatten([1, [2, [3, [4]], 5]]);
- * // => [1, 2, [3, [4]], 5]
- */
- function flatten(array) {
- var length = array ? array.length : 0;
- return length ? baseFlatten(array, 1) : [];
- }
-
- /**
- * Recursively flattens `array`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to flatten.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * _.flattenDeep([1, [2, [3, [4]], 5]]);
- * // => [1, 2, 3, 4, 5]
- */
- function flattenDeep(array) {
- var length = array ? array.length : 0;
- return length ? baseFlatten(array, INFINITY) : [];
- }
-
- /**
- * Recursively flatten `array` up to `depth` times.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to flatten.
- * @param {number} [depth=1] The maximum recursion depth.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * var array = [1, [2, [3, [4]], 5]];
- *
- * _.flattenDepth(array, 1);
- * // => [1, 2, [3, [4]], 5]
- *
- * _.flattenDepth(array, 2);
- * // => [1, 2, 3, [4], 5]
- */
- function flattenDepth(array, depth) {
- var length = array ? array.length : 0;
- if (!length) {
- return [];
- }
- depth = depth === undefined ? 1 : toInteger(depth);
- return baseFlatten(array, depth);
- }
-
- /**
- * The inverse of `_.toPairs`; this method returns an object composed
- * from key-value `pairs`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} pairs The key-value pairs.
- * @returns {Object} Returns the new object.
- * @example
- *
- * _.fromPairs([['fred', 30], ['barney', 40]]);
- * // => { 'fred': 30, 'barney': 40 }
- */
- function fromPairs(pairs) {
- var index = -1,
- length = pairs ? pairs.length : 0,
- result = {};
-
- while (++index < length) {
- var pair = pairs[index];
- result[pair[0]] = pair[1];
- }
- return result;
- }
-
- /**
- * Gets the first element of `array`.
- *
- * @static
- * @memberOf _
- * @alias first
- * @category Array
- * @param {Array} array The array to query.
- * @returns {*} Returns the first element of `array`.
- * @example
- *
- * _.head([1, 2, 3]);
- * // => 1
- *
- * _.head([]);
- * // => undefined
- */
- function head(array) {
- return array ? array[0] : undefined;
- }
-
- /**
- * Gets the index at which the first occurrence of `value` is found in `array`
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
- * for equality comparisons. If `fromIndex` is negative, it's used as the offset
- * from the end of `array`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to search.
- * @param {*} value The value to search for.
- * @param {number} [fromIndex=0] The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- * @example
- *
- * _.indexOf([1, 2, 1, 2], 2);
- * // => 1
- *
- * // Search from the `fromIndex`.
- * _.indexOf([1, 2, 1, 2], 2, 2);
- * // => 3
- */
- function indexOf(array, value, fromIndex) {
- var length = array ? array.length : 0;
- if (!length) {
- return -1;
- }
- fromIndex = toInteger(fromIndex);
- if (fromIndex < 0) {
- fromIndex = nativeMax(length + fromIndex, 0);
- }
- return baseIndexOf(array, value, fromIndex);
- }
-
- /**
- * Gets all but the last element of `array`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to query.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.initial([1, 2, 3]);
- * // => [1, 2]
- */
- function initial(array) {
- return dropRight(array, 1);
- }
-
- /**
- * Creates an array of unique values that are included in all given arrays
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
- * for equality comparisons. The order of result values is determined by the
- * order they occur in the first array.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @returns {Array} Returns the new array of intersecting values.
- * @example
- *
- * _.intersection([2, 1], [4, 2], [1, 2]);
- * // => [2]
- */
- var intersection = rest(function(arrays) {
- var mapped = arrayMap(arrays, baseCastArrayLikeObject);
- return (mapped.length && mapped[0] === arrays[0])
- ? baseIntersection(mapped)
- : [];
- });
-
- /**
- * This method is like `_.intersection` except that it accepts `iteratee`
- * which is invoked for each element of each `arrays` to generate the criterion
- * by which they're compared. Result values are chosen from the first array.
- * The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns the new array of intersecting values.
- * @example
- *
- * _.intersectionBy([2.1, 1.2], [4.3, 2.4], Math.floor);
- * // => [2.1]
- *
- * // The `_.property` iteratee shorthand.
- * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
- * // => [{ 'x': 1 }]
- */
- var intersectionBy = rest(function(arrays) {
- var iteratee = last(arrays),
- mapped = arrayMap(arrays, baseCastArrayLikeObject);
-
- if (iteratee === last(mapped)) {
- iteratee = undefined;
- } else {
- mapped.pop();
- }
- return (mapped.length && mapped[0] === arrays[0])
- ? baseIntersection(mapped, getIteratee(iteratee))
- : [];
- });
-
- /**
- * This method is like `_.intersection` except that it accepts `comparator`
- * which is invoked to compare elements of `arrays`. Result values are chosen
- * from the first array. The comparator is invoked with two arguments:
- * (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of intersecting values.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
- * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
- *
- * _.intersectionWith(objects, others, _.isEqual);
- * // => [{ 'x': 1, 'y': 2 }]
- */
- var intersectionWith = rest(function(arrays) {
- var comparator = last(arrays),
- mapped = arrayMap(arrays, baseCastArrayLikeObject);
-
- if (comparator === last(mapped)) {
- comparator = undefined;
- } else {
- mapped.pop();
- }
- return (mapped.length && mapped[0] === arrays[0])
- ? baseIntersection(mapped, undefined, comparator)
- : [];
- });
-
- /**
- * Converts all elements in `array` into a string separated by `separator`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to convert.
- * @param {string} [separator=','] The element separator.
- * @returns {string} Returns the joined string.
- * @example
- *
- * _.join(['a', 'b', 'c'], '~');
- * // => 'a~b~c'
- */
- function join(array, separator) {
- return array ? nativeJoin.call(array, separator) : '';
- }
-
- /**
- * Gets the last element of `array`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to query.
- * @returns {*} Returns the last element of `array`.
- * @example
- *
- * _.last([1, 2, 3]);
- * // => 3
- */
- function last(array) {
- var length = array ? array.length : 0;
- return length ? array[length - 1] : undefined;
- }
-
- /**
- * This method is like `_.indexOf` except that it iterates over elements of
- * `array` from right to left.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to search.
- * @param {*} value The value to search for.
- * @param {number} [fromIndex=array.length-1] The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- * @example
- *
- * _.lastIndexOf([1, 2, 1, 2], 2);
- * // => 3
- *
- * // Search from the `fromIndex`.
- * _.lastIndexOf([1, 2, 1, 2], 2, 2);
- * // => 1
- */
- function lastIndexOf(array, value, fromIndex) {
- var length = array ? array.length : 0;
- if (!length) {
- return -1;
- }
- var index = length;
- if (fromIndex !== undefined) {
- index = toInteger(fromIndex);
- index = (index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1)) + 1;
- }
- if (value !== value) {
- return indexOfNaN(array, index, true);
- }
- while (index--) {
- if (array[index] === value) {
- return index;
- }
- }
- return -1;
- }
-
- /**
- * Removes all given values from `array` using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
- * for equality comparisons.
- *
- * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
- * to remove elements from an array by predicate.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to modify.
- * @param {...*} [values] The values to remove.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [1, 2, 3, 1, 2, 3];
- *
- * _.pull(array, 2, 3);
- * console.log(array);
- * // => [1, 1]
- */
- var pull = rest(pullAll);
-
- /**
- * This method is like `_.pull` except that it accepts an array of values to remove.
- *
- * **Note:** Unlike `_.difference`, this method mutates `array`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [1, 2, 3, 1, 2, 3];
- *
- * _.pullAll(array, [2, 3]);
- * console.log(array);
- * // => [1, 1]
- */
- function pullAll(array, values) {
- return (array && array.length && values && values.length)
- ? basePullAll(array, values)
- : array;
- }
-
- /**
- * This method is like `_.pullAll` except that it accepts `iteratee` which is
- * invoked for each element of `array` and `values` to generate the criterion
- * by which they're compared. The iteratee is invoked with one argument: (value).
- *
- * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
- *
- * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
- * console.log(array);
- * // => [{ 'x': 2 }]
- */
- function pullAllBy(array, values, iteratee) {
- return (array && array.length && values && values.length)
- ? basePullAll(array, values, getIteratee(iteratee))
- : array;
- }
-
- /**
- * This method is like `_.pullAll` except that it accepts `comparator` which
- * is invoked to compare elements of `array` to `values`. The comparator is
- * invoked with two arguments: (arrVal, othVal).
- *
- * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
- *
- * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
- * console.log(array);
- * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
- */
- function pullAllWith(array, values, comparator) {
- return (array && array.length && values && values.length)
- ? basePullAll(array, values, undefined, comparator)
- : array;
- }
-
- /**
- * Removes elements from `array` corresponding to `indexes` and returns an
- * array of removed elements.
- *
- * **Note:** Unlike `_.at`, this method mutates `array`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to modify.
- * @param {...(number|number[])} [indexes] The indexes of elements to remove,
- * specified individually or in arrays.
- * @returns {Array} Returns the new array of removed elements.
- * @example
- *
- * var array = [5, 10, 15, 20];
- * var evens = _.pullAt(array, 1, 3);
- *
- * console.log(array);
- * // => [5, 15]
- *
- * console.log(evens);
- * // => [10, 20]
- */
- var pullAt = rest(function(array, indexes) {
- indexes = arrayMap(baseFlatten(indexes, 1), String);
-
- var result = baseAt(array, indexes);
- basePullAt(array, indexes.sort(compareAscending));
- return result;
- });
-
- /**
- * Removes all elements from `array` that `predicate` returns truthy for
- * and returns an array of the removed elements. The predicate is invoked
- * with three arguments: (value, index, array).
- *
- * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
- * to pull elements from an array by value.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to modify.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new array of removed elements.
- * @example
- *
- * var array = [1, 2, 3, 4];
- * var evens = _.remove(array, function(n) {
- * return n % 2 == 0;
- * });
- *
- * console.log(array);
- * // => [1, 3]
- *
- * console.log(evens);
- * // => [2, 4]
- */
- function remove(array, predicate) {
- var result = [];
- if (!(array && array.length)) {
- return result;
- }
- var index = -1,
- indexes = [],
- length = array.length;
-
- predicate = getIteratee(predicate, 3);
- while (++index < length) {
- var value = array[index];
- if (predicate(value, index, array)) {
- result.push(value);
- indexes.push(index);
- }
- }
- basePullAt(array, indexes);
- return result;
- }
-
- /**
- * Reverses `array` so that the first element becomes the last, the second
- * element becomes the second to last, and so on.
- *
- * **Note:** This method mutates `array` and is based on
- * [`Array#reverse`](https://mdn.io/Array/reverse).
- *
- * @static
- * @memberOf _
- * @category Array
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [1, 2, 3];
- *
- * _.reverse(array);
- * // => [3, 2, 1]
- *
- * console.log(array);
- * // => [3, 2, 1]
- */
- function reverse(array) {
- return array ? nativeReverse.call(array) : array;
- }
-
- /**
- * Creates a slice of `array` from `start` up to, but not including, `end`.
- *
- * **Note:** This method is used instead of [`Array#slice`](https://mdn.io/Array/slice)
- * to ensure dense arrays are returned.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to slice.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns the slice of `array`.
- */
- function slice(array, start, end) {
- var length = array ? array.length : 0;
- if (!length) {
- return [];
- }
- if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
- start = 0;
- end = length;
- }
- else {
- start = start == null ? 0 : toInteger(start);
- end = end === undefined ? length : toInteger(end);
- }
- return baseSlice(array, start, end);
- }
-
- /**
- * Uses a binary search to determine the lowest index at which `value` should
- * be inserted into `array` in order to maintain its sort order.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @returns {number} Returns the index at which `value` should be inserted into `array`.
- * @example
- *
- * _.sortedIndex([30, 50], 40);
- * // => 1
- *
- * _.sortedIndex([4, 5], 4);
- * // => 0
- */
- function sortedIndex(array, value) {
- return baseSortedIndex(array, value);
- }
-
- /**
- * This method is like `_.sortedIndex` except that it accepts `iteratee`
- * which is invoked for `value` and each element of `array` to compute their
- * sort ranking. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {number} Returns the index at which `value` should be inserted into `array`.
- * @example
- *
- * var dict = { 'thirty': 30, 'forty': 40, 'fifty': 50 };
- *
- * _.sortedIndexBy(['thirty', 'fifty'], 'forty', _.propertyOf(dict));
- * // => 1
- *
- * // The `_.property` iteratee shorthand.
- * _.sortedIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
- * // => 0
- */
- function sortedIndexBy(array, value, iteratee) {
- return baseSortedIndexBy(array, value, getIteratee(iteratee));
- }
-
- /**
- * This method is like `_.indexOf` except that it performs a binary
- * search on a sorted `array`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to search.
- * @param {*} value The value to search for.
- * @returns {number} Returns the index of the matched value, else `-1`.
- * @example
- *
- * _.sortedIndexOf([1, 1, 2, 2], 2);
- * // => 2
- */
- function sortedIndexOf(array, value) {
- var length = array ? array.length : 0;
- if (length) {
- var index = baseSortedIndex(array, value);
- if (index < length && eq(array[index], value)) {
- return index;
- }
- }
- return -1;
- }
-
- /**
- * This method is like `_.sortedIndex` except that it returns the highest
- * index at which `value` should be inserted into `array` in order to
- * maintain its sort order.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @returns {number} Returns the index at which `value` should be inserted into `array`.
- * @example
- *
- * _.sortedLastIndex([4, 5], 4);
- * // => 1
- */
- function sortedLastIndex(array, value) {
- return baseSortedIndex(array, value, true);
- }
-
- /**
- * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
- * which is invoked for `value` and each element of `array` to compute their
- * sort ranking. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {number} Returns the index at which `value` should be inserted into `array`.
- * @example
- *
- * // The `_.property` iteratee shorthand.
- * _.sortedLastIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
- * // => 1
- */
- function sortedLastIndexBy(array, value, iteratee) {
- return baseSortedIndexBy(array, value, getIteratee(iteratee), true);
- }
-
- /**
- * This method is like `_.lastIndexOf` except that it performs a binary
- * search on a sorted `array`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to search.
- * @param {*} value The value to search for.
- * @returns {number} Returns the index of the matched value, else `-1`.
- * @example
- *
- * _.sortedLastIndexOf([1, 1, 2, 2], 2);
- * // => 3
- */
- function sortedLastIndexOf(array, value) {
- var length = array ? array.length : 0;
- if (length) {
- var index = baseSortedIndex(array, value, true) - 1;
- if (eq(array[index], value)) {
- return index;
- }
- }
- return -1;
- }
-
- /**
- * This method is like `_.uniq` except that it's designed and optimized
- * for sorted arrays.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to inspect.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * _.sortedUniq([1, 1, 2]);
- * // => [1, 2]
- */
- function sortedUniq(array) {
- return (array && array.length)
- ? baseSortedUniq(array)
- : [];
- }
-
- /**
- * This method is like `_.uniqBy` except that it's designed and optimized
- * for sorted arrays.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
- * // => [1.1, 2.3]
- */
- function sortedUniqBy(array, iteratee) {
- return (array && array.length)
- ? baseSortedUniqBy(array, getIteratee(iteratee))
- : [];
- }
-
- /**
- * Gets all but the first element of `array`.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to query.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.tail([1, 2, 3]);
- * // => [2, 3]
- */
- function tail(array) {
- return drop(array, 1);
- }
-
- /**
- * Creates a slice of `array` with `n` elements taken from the beginning.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=1] The number of elements to take.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.take([1, 2, 3]);
- * // => [1]
- *
- * _.take([1, 2, 3], 2);
- * // => [1, 2]
- *
- * _.take([1, 2, 3], 5);
- * // => [1, 2, 3]
- *
- * _.take([1, 2, 3], 0);
- * // => []
- */
- function take(array, n, guard) {
- if (!(array && array.length)) {
- return [];
- }
- n = (guard || n === undefined) ? 1 : toInteger(n);
- return baseSlice(array, 0, n < 0 ? 0 : n);
- }
-
- /**
- * Creates a slice of `array` with `n` elements taken from the end.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=1] The number of elements to take.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.takeRight([1, 2, 3]);
- * // => [3]
- *
- * _.takeRight([1, 2, 3], 2);
- * // => [2, 3]
- *
- * _.takeRight([1, 2, 3], 5);
- * // => [1, 2, 3]
- *
- * _.takeRight([1, 2, 3], 0);
- * // => []
- */
- function takeRight(array, n, guard) {
- var length = array ? array.length : 0;
- if (!length) {
- return [];
- }
- n = (guard || n === undefined) ? 1 : toInteger(n);
- n = length - n;
- return baseSlice(array, n < 0 ? 0 : n, length);
- }
-
- /**
- * Creates a slice of `array` with elements taken from the end. Elements are
- * taken until `predicate` returns falsey. The predicate is invoked with three
- * arguments: (value, index, array).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to query.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': true },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': false }
- * ];
- *
- * _.takeRightWhile(users, function(o) { return !o.active; });
- * // => objects for ['fred', 'pebbles']
- *
- * // The `_.matches` iteratee shorthand.
- * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
- * // => objects for ['pebbles']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.takeRightWhile(users, ['active', false]);
- * // => objects for ['fred', 'pebbles']
- *
- * // The `_.property` iteratee shorthand.
- * _.takeRightWhile(users, 'active');
- * // => []
- */
- function takeRightWhile(array, predicate) {
- return (array && array.length)
- ? baseWhile(array, getIteratee(predicate, 3), false, true)
- : [];
- }
-
- /**
- * Creates a slice of `array` with elements taken from the beginning. Elements
- * are taken until `predicate` returns falsey. The predicate is invoked with
- * three arguments: (value, index, array).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to query.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': false },
- * { 'user': 'fred', 'active': false},
- * { 'user': 'pebbles', 'active': true }
- * ];
- *
- * _.takeWhile(users, function(o) { return !o.active; });
- * // => objects for ['barney', 'fred']
- *
- * // The `_.matches` iteratee shorthand.
- * _.takeWhile(users, { 'user': 'barney', 'active': false });
- * // => objects for ['barney']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.takeWhile(users, ['active', false]);
- * // => objects for ['barney', 'fred']
- *
- * // The `_.property` iteratee shorthand.
- * _.takeWhile(users, 'active');
- * // => []
- */
- function takeWhile(array, predicate) {
- return (array && array.length)
- ? baseWhile(array, getIteratee(predicate, 3))
- : [];
- }
-
- /**
- * Creates an array of unique values, in order, from all given arrays using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
- * for equality comparisons.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @returns {Array} Returns the new array of combined values.
- * @example
- *
- * _.union([2, 1], [4, 2], [1, 2]);
- * // => [2, 1, 4]
- */
- var union = rest(function(arrays) {
- return baseUniq(baseFlatten(arrays, 1, true));
- });
-
- /**
- * This method is like `_.union` except that it accepts `iteratee` which is
- * invoked for each element of each `arrays` to generate the criterion by which
- * uniqueness is computed. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns the new array of combined values.
- * @example
- *
- * _.unionBy([2.1, 1.2], [4.3, 2.4], Math.floor);
- * // => [2.1, 1.2, 4.3]
- *
- * // The `_.property` iteratee shorthand.
- * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
- * // => [{ 'x': 1 }, { 'x': 2 }]
- */
- var unionBy = rest(function(arrays) {
- var iteratee = last(arrays);
- if (isArrayLikeObject(iteratee)) {
- iteratee = undefined;
- }
- return baseUniq(baseFlatten(arrays, 1, true), getIteratee(iteratee));
- });
-
- /**
- * This method is like `_.union` except that it accepts `comparator` which
- * is invoked to compare elements of `arrays`. The comparator is invoked
- * with two arguments: (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of combined values.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
- * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
- *
- * _.unionWith(objects, others, _.isEqual);
- * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
- */
- var unionWith = rest(function(arrays) {
- var comparator = last(arrays);
- if (isArrayLikeObject(comparator)) {
- comparator = undefined;
- }
- return baseUniq(baseFlatten(arrays, 1, true), undefined, comparator);
- });
-
- /**
- * Creates a duplicate-free version of an array, using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
- * for equality comparisons, in which only the first occurrence of each element
- * is kept.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to inspect.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * _.uniq([2, 1, 2]);
- * // => [2, 1]
- */
- function uniq(array) {
- return (array && array.length)
- ? baseUniq(array)
- : [];
- }
-
- /**
- * This method is like `_.uniq` except that it accepts `iteratee` which is
- * invoked for each element in `array` to generate the criterion by which
- * uniqueness is computed. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
- * // => [2.1, 1.2]
- *
- * // The `_.property` iteratee shorthand.
- * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
- * // => [{ 'x': 1 }, { 'x': 2 }]
- */
- function uniqBy(array, iteratee) {
- return (array && array.length)
- ? baseUniq(array, getIteratee(iteratee))
- : [];
- }
-
- /**
- * This method is like `_.uniq` except that it accepts `comparator` which
- * is invoked to compare elements of `array`. The comparator is invoked with
- * two arguments: (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
- *
- * _.uniqWith(objects, _.isEqual);
- * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
- */
- function uniqWith(array, comparator) {
- return (array && array.length)
- ? baseUniq(array, undefined, comparator)
- : [];
- }
-
- /**
- * This method is like `_.zip` except that it accepts an array of grouped
- * elements and creates an array regrouping the elements to their pre-zip
- * configuration.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array of grouped elements to process.
- * @returns {Array} Returns the new array of regrouped elements.
- * @example
- *
- * var zipped = _.zip(['fred', 'barney'], [30, 40], [true, false]);
- * // => [['fred', 30, true], ['barney', 40, false]]
- *
- * _.unzip(zipped);
- * // => [['fred', 'barney'], [30, 40], [true, false]]
- */
- function unzip(array) {
- if (!(array && array.length)) {
- return [];
- }
- var length = 0;
- array = arrayFilter(array, function(group) {
- if (isArrayLikeObject(group)) {
- length = nativeMax(group.length, length);
- return true;
- }
- });
- return baseTimes(length, function(index) {
- return arrayMap(array, baseProperty(index));
- });
- }
-
- /**
- * This method is like `_.unzip` except that it accepts `iteratee` to specify
- * how regrouped values should be combined. The iteratee is invoked with the
- * elements of each group: (...group).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array of grouped elements to process.
- * @param {Function} [iteratee=_.identity] The function to combine regrouped values.
- * @returns {Array} Returns the new array of regrouped elements.
- * @example
- *
- * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
- * // => [[1, 10, 100], [2, 20, 200]]
- *
- * _.unzipWith(zipped, _.add);
- * // => [3, 30, 300]
- */
- function unzipWith(array, iteratee) {
- if (!(array && array.length)) {
- return [];
- }
- var result = unzip(array);
- if (iteratee == null) {
- return result;
- }
- return arrayMap(result, function(group) {
- return apply(iteratee, undefined, group);
- });
- }
-
- /**
- * Creates an array excluding all given values using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
- * for equality comparisons.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} array The array to filter.
- * @param {...*} [values] The values to exclude.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * _.without([1, 2, 1, 3], 1, 2);
- * // => [3]
- */
- var without = rest(function(array, values) {
- return isArrayLikeObject(array)
- ? baseDifference(array, values)
- : [];
- });
-
- /**
- * Creates an array of unique values that is the [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
- * of the given arrays. The order of result values is determined by the order
- * they occur in the arrays.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @returns {Array} Returns the new array of values.
- * @example
- *
- * _.xor([2, 1], [4, 2]);
- * // => [1, 4]
- */
- var xor = rest(function(arrays) {
- return baseXor(arrayFilter(arrays, isArrayLikeObject));
- });
-
- /**
- * This method is like `_.xor` except that it accepts `iteratee` which is
- * invoked for each element of each `arrays` to generate the criterion by which
- * by which they're compared. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns the new array of values.
- * @example
- *
- * _.xorBy([2.1, 1.2], [4.3, 2.4], Math.floor);
- * // => [1.2, 4.3]
- *
- * // The `_.property` iteratee shorthand.
- * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
- * // => [{ 'x': 2 }]
- */
- var xorBy = rest(function(arrays) {
- var iteratee = last(arrays);
- if (isArrayLikeObject(iteratee)) {
- iteratee = undefined;
- }
- return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee));
- });
-
- /**
- * This method is like `_.xor` except that it accepts `comparator` which is
- * invoked to compare elements of `arrays`. The comparator is invoked with
- * two arguments: (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of values.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
- * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
- *
- * _.xorWith(objects, others, _.isEqual);
- * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
- */
- var xorWith = rest(function(arrays) {
- var comparator = last(arrays);
- if (isArrayLikeObject(comparator)) {
- comparator = undefined;
- }
- return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
- });
-
- /**
- * Creates an array of grouped elements, the first of which contains the first
- * elements of the given arrays, the second of which contains the second elements
- * of the given arrays, and so on.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {...Array} [arrays] The arrays to process.
- * @returns {Array} Returns the new array of grouped elements.
- * @example
- *
- * _.zip(['fred', 'barney'], [30, 40], [true, false]);
- * // => [['fred', 30, true], ['barney', 40, false]]
- */
- var zip = rest(unzip);
-
- /**
- * This method is like `_.fromPairs` except that it accepts two arrays,
- * one of property names and one of corresponding values.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} [props=[]] The property names.
- * @param {Array} [values=[]] The property values.
- * @returns {Object} Returns the new object.
- * @example
- *
- * _.zipObject(['a', 'b'], [1, 2]);
- * // => { 'a': 1, 'b': 2 }
- */
- function zipObject(props, values) {
- return baseZipObject(props || [], values || [], assignValue);
- }
-
- /**
- * This method is like `_.zipObject` except that it supports property paths.
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {Array} [props=[]] The property names.
- * @param {Array} [values=[]] The property values.
- * @returns {Object} Returns the new object.
- * @example
- *
- * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
- * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
- */
- function zipObjectDeep(props, values) {
- return baseZipObject(props || [], values || [], baseSet);
- }
-
- /**
- * This method is like `_.zip` except that it accepts `iteratee` to specify
- * how grouped values should be combined. The iteratee is invoked with the
- * elements of each group: (...group).
- *
- * @static
- * @memberOf _
- * @category Array
- * @param {...Array} [arrays] The arrays to process.
- * @param {Function} [iteratee=_.identity] The function to combine grouped values.
- * @returns {Array} Returns the new array of grouped elements.
- * @example
- *
- * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
- * return a + b + c;
- * });
- * // => [111, 222]
- */
- var zipWith = rest(function(arrays) {
- var length = arrays.length,
- iteratee = length > 1 ? arrays[length - 1] : undefined;
-
- iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
- return unzipWith(arrays, iteratee);
- });
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates a `lodash` object that wraps `value` with explicit method chaining enabled.
- * The result of such method chaining must be unwrapped with `_#value`.
- *
- * @static
- * @memberOf _
- * @category Seq
- * @param {*} value The value to wrap.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36 },
- * { 'user': 'fred', 'age': 40 },
- * { 'user': 'pebbles', 'age': 1 }
- * ];
- *
- * var youngest = _
- * .chain(users)
- * .sortBy('age')
- * .map(function(o) {
- * return o.user + ' is ' + o.age;
- * })
- * .head()
- * .value();
- * // => 'pebbles is 1'
- */
- function chain(value) {
- var result = lodash(value);
- result.__chain__ = true;
- return result;
- }
-
- /**
- * This method invokes `interceptor` and returns `value`. The interceptor
- * is invoked with one argument; (value). The purpose of this method is to
- * "tap into" a method chain in order to modify intermediate results.
- *
- * @static
- * @memberOf _
- * @category Seq
- * @param {*} value The value to provide to `interceptor`.
- * @param {Function} interceptor The function to invoke.
- * @returns {*} Returns `value`.
- * @example
- *
- * _([1, 2, 3])
- * .tap(function(array) {
- * // Mutate input array.
- * array.pop();
- * })
- * .reverse()
- * .value();
- * // => [2, 1]
- */
- function tap(value, interceptor) {
- interceptor(value);
- return value;
- }
-
- /**
- * This method is like `_.tap` except that it returns the result of `interceptor`.
- * The purpose of this method is to "pass thru" values replacing intermediate
- * results in a method chain.
- *
- * @static
- * @memberOf _
- * @category Seq
- * @param {*} value The value to provide to `interceptor`.
- * @param {Function} interceptor The function to invoke.
- * @returns {*} Returns the result of `interceptor`.
- * @example
- *
- * _(' abc ')
- * .chain()
- * .trim()
- * .thru(function(value) {
- * return [value];
- * })
- * .value();
- * // => ['abc']
- */
- function thru(value, interceptor) {
- return interceptor(value);
- }
-
- /**
- * This method is the wrapper version of `_.at`.
- *
- * @name at
- * @memberOf _
- * @category Seq
- * @param {...(string|string[])} [paths] The property paths of elements to pick,
- * specified individually or in arrays.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
- *
- * _(object).at(['a[0].b.c', 'a[1]']).value();
- * // => [3, 4]
- *
- * _(['a', 'b', 'c']).at(0, 2).value();
- * // => ['a', 'c']
- */
- var wrapperAt = rest(function(paths) {
- paths = baseFlatten(paths, 1);
- var length = paths.length,
- start = length ? paths[0] : 0,
- value = this.__wrapped__,
- interceptor = function(object) { return baseAt(object, paths); };
-
- if (length > 1 || this.__actions__.length ||
- !(value instanceof LazyWrapper) || !isIndex(start)) {
- return this.thru(interceptor);
- }
- value = value.slice(start, +start + (length ? 1 : 0));
- value.__actions__.push({
- 'func': thru,
- 'args': [interceptor],
- 'thisArg': undefined
- });
- return new LodashWrapper(value, this.__chain__).thru(function(array) {
- if (length && !array.length) {
- array.push(undefined);
- }
- return array;
- });
- });
-
- /**
- * Enables explicit method chaining on the wrapper object.
- *
- * @name chain
- * @memberOf _
- * @category Seq
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36 },
- * { 'user': 'fred', 'age': 40 }
- * ];
- *
- * // A sequence without explicit chaining.
- * _(users).head();
- * // => { 'user': 'barney', 'age': 36 }
- *
- * // A sequence with explicit chaining.
- * _(users)
- * .chain()
- * .head()
- * .pick('user')
- * .value();
- * // => { 'user': 'barney' }
- */
- function wrapperChain() {
- return chain(this);
- }
-
- /**
- * Executes the chained sequence and returns the wrapped result.
- *
- * @name commit
- * @memberOf _
- * @category Seq
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var array = [1, 2];
- * var wrapped = _(array).push(3);
- *
- * console.log(array);
- * // => [1, 2]
- *
- * wrapped = wrapped.commit();
- * console.log(array);
- * // => [1, 2, 3]
- *
- * wrapped.last();
- * // => 3
- *
- * console.log(array);
- * // => [1, 2, 3]
- */
- function wrapperCommit() {
- return new LodashWrapper(this.value(), this.__chain__);
- }
-
- /**
- * This method is the wrapper version of `_.flatMap`.
- *
- * @name flatMap
- * @memberOf _
- * @category Seq
- * @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * function duplicate(n) {
- * return [n, n];
- * }
- *
- * _([1, 2]).flatMap(duplicate).value();
- * // => [1, 1, 2, 2]
- */
- function wrapperFlatMap(iteratee) {
- return this.map(iteratee).flatten();
- }
-
- /**
- * Gets the next value on a wrapped object following the
- * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
- *
- * @name next
- * @memberOf _
- * @category Seq
- * @returns {Object} Returns the next iterator value.
- * @example
- *
- * var wrapped = _([1, 2]);
- *
- * wrapped.next();
- * // => { 'done': false, 'value': 1 }
- *
- * wrapped.next();
- * // => { 'done': false, 'value': 2 }
- *
- * wrapped.next();
- * // => { 'done': true, 'value': undefined }
- */
- function wrapperNext() {
- if (this.__values__ === undefined) {
- this.__values__ = toArray(this.value());
- }
- var done = this.__index__ >= this.__values__.length,
- value = done ? undefined : this.__values__[this.__index__++];
-
- return { 'done': done, 'value': value };
- }
-
- /**
- * Enables the wrapper to be iterable.
- *
- * @name Symbol.iterator
- * @memberOf _
- * @category Seq
- * @returns {Object} Returns the wrapper object.
- * @example
- *
- * var wrapped = _([1, 2]);
- *
- * wrapped[Symbol.iterator]() === wrapped;
- * // => true
- *
- * Array.from(wrapped);
- * // => [1, 2]
- */
- function wrapperToIterator() {
- return this;
- }
-
- /**
- * Creates a clone of the chained sequence planting `value` as the wrapped value.
- *
- * @name plant
- * @memberOf _
- * @category Seq
- * @param {*} value The value to plant.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * var wrapped = _([1, 2]).map(square);
- * var other = wrapped.plant([3, 4]);
- *
- * other.value();
- * // => [9, 16]
- *
- * wrapped.value();
- * // => [1, 4]
- */
- function wrapperPlant(value) {
- var result,
- parent = this;
-
- while (parent instanceof baseLodash) {
- var clone = wrapperClone(parent);
- clone.__index__ = 0;
- clone.__values__ = undefined;
- if (result) {
- previous.__wrapped__ = clone;
- } else {
- result = clone;
- }
- var previous = clone;
- parent = parent.__wrapped__;
- }
- previous.__wrapped__ = value;
- return result;
- }
-
- /**
- * This method is the wrapper version of `_.reverse`.
- *
- * **Note:** This method mutates the wrapped array.
- *
- * @name reverse
- * @memberOf _
- * @category Seq
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var array = [1, 2, 3];
- *
- * _(array).reverse().value()
- * // => [3, 2, 1]
- *
- * console.log(array);
- * // => [3, 2, 1]
- */
- function wrapperReverse() {
- var value = this.__wrapped__;
- if (value instanceof LazyWrapper) {
- var wrapped = value;
- if (this.__actions__.length) {
- wrapped = new LazyWrapper(this);
- }
- wrapped = wrapped.reverse();
- wrapped.__actions__.push({
- 'func': thru,
- 'args': [reverse],
- 'thisArg': undefined
- });
- return new LodashWrapper(wrapped, this.__chain__);
- }
- return this.thru(reverse);
- }
-
- /**
- * Executes the chained sequence to extract the unwrapped value.
- *
- * @name value
- * @memberOf _
- * @alias toJSON, valueOf
- * @category Seq
- * @returns {*} Returns the resolved unwrapped value.
- * @example
- *
- * _([1, 2, 3]).value();
- * // => [1, 2, 3]
- */
- function wrapperValue() {
- return baseWrapperValue(this.__wrapped__, this.__actions__);
- }
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Creates an object composed of keys generated from the results of running
- * each element of `collection` through `iteratee`. The corresponding value
- * of each key is the number of times the key was returned by `iteratee`.
- * The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee to transform keys.
- * @returns {Object} Returns the composed aggregate object.
- * @example
- *
- * _.countBy([6.1, 4.2, 6.3], Math.floor);
- * // => { '4': 1, '6': 2 }
- *
- * _.countBy(['one', 'two', 'three'], 'length');
- * // => { '3': 2, '5': 1 }
- */
- var countBy = createAggregator(function(result, value, key) {
- hasOwnProperty.call(result, key) ? ++result[key] : (result[key] = 1);
- });
-
- /**
- * Checks if `predicate` returns truthy for **all** elements of `collection`.
- * Iteration is stopped once `predicate` returns falsey. The predicate is
- * invoked with three arguments: (value, index|key, collection).
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {boolean} Returns `true` if all elements pass the predicate check, else `false`.
- * @example
- *
- * _.every([true, 1, null, 'yes'], Boolean);
- * // => false
- *
- * var users = [
- * { 'user': 'barney', 'active': false },
- * { 'user': 'fred', 'active': false }
- * ];
- *
- * // The `_.matches` iteratee shorthand.
- * _.every(users, { 'user': 'barney', 'active': false });
- * // => false
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.every(users, ['active', false]);
- * // => true
- *
- * // The `_.property` iteratee shorthand.
- * _.every(users, 'active');
- * // => false
- */
- function every(collection, predicate, guard) {
- var func = isArray(collection) ? arrayEvery : baseEvery;
- if (guard && isIterateeCall(collection, predicate, guard)) {
- predicate = undefined;
- }
- return func(collection, getIteratee(predicate, 3));
- }
-
- /**
- * Iterates over elements of `collection`, returning an array of all elements
- * `predicate` returns truthy for. The predicate is invoked with three arguments:
- * (value, index|key, collection).
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': true },
- * { 'user': 'fred', 'age': 40, 'active': false }
- * ];
- *
- * _.filter(users, function(o) { return !o.active; });
- * // => objects for ['fred']
- *
- * // The `_.matches` iteratee shorthand.
- * _.filter(users, { 'age': 36, 'active': true });
- * // => objects for ['barney']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.filter(users, ['active', false]);
- * // => objects for ['fred']
- *
- * // The `_.property` iteratee shorthand.
- * _.filter(users, 'active');
- * // => objects for ['barney']
- */
- function filter(collection, predicate) {
- var func = isArray(collection) ? arrayFilter : baseFilter;
- return func(collection, getIteratee(predicate, 3));
- }
-
- /**
- * Iterates over elements of `collection`, returning the first element
- * `predicate` returns truthy for. The predicate is invoked with three arguments:
- * (value, index|key, collection).
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to search.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {*} Returns the matched element, else `undefined`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': true },
- * { 'user': 'fred', 'age': 40, 'active': false },
- * { 'user': 'pebbles', 'age': 1, 'active': true }
- * ];
- *
- * _.find(users, function(o) { return o.age < 40; });
- * // => object for 'barney'
- *
- * // The `_.matches` iteratee shorthand.
- * _.find(users, { 'age': 1, 'active': true });
- * // => object for 'pebbles'
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.find(users, ['active', false]);
- * // => object for 'fred'
- *
- * // The `_.property` iteratee shorthand.
- * _.find(users, 'active');
- * // => object for 'barney'
- */
- function find(collection, predicate) {
- predicate = getIteratee(predicate, 3);
- if (isArray(collection)) {
- var index = baseFindIndex(collection, predicate);
- return index > -1 ? collection[index] : undefined;
- }
- return baseFind(collection, predicate, baseEach);
- }
-
- /**
- * This method is like `_.find` except that it iterates over elements of
- * `collection` from right to left.
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to search.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {*} Returns the matched element, else `undefined`.
- * @example
- *
- * _.findLast([1, 2, 3, 4], function(n) {
- * return n % 2 == 1;
- * });
- * // => 3
- */
- function findLast(collection, predicate) {
- predicate = getIteratee(predicate, 3);
- if (isArray(collection)) {
- var index = baseFindIndex(collection, predicate, true);
- return index > -1 ? collection[index] : undefined;
- }
- return baseFind(collection, predicate, baseEachRight);
- }
-
- /**
- * Creates an array of flattened values by running each element in `collection`
- * through `iteratee` and concating its result to the other mapped values.
- * The iteratee is invoked with three arguments: (value, index|key, collection).
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * function duplicate(n) {
- * return [n, n];
- * }
- *
- * _.flatMap([1, 2], duplicate);
- * // => [1, 1, 2, 2]
- */
- function flatMap(collection, iteratee) {
- return baseFlatten(map(collection, iteratee), 1);
- }
-
- /**
- * Iterates over elements of `collection` invoking `iteratee` for each element.
- * The iteratee is invoked with three arguments: (value, index|key, collection).
- * Iteratee functions may exit iteration early by explicitly returning `false`.
- *
- * **Note:** As with other "Collections" methods, objects with a "length" property
- * are iterated like arrays. To avoid this behavior use `_.forIn` or `_.forOwn`
- * for object iteration.
- *
- * @static
- * @memberOf _
- * @alias each
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array|Object} Returns `collection`.
- * @example
- *
- * _([1, 2]).forEach(function(value) {
- * console.log(value);
- * });
- * // => logs `1` then `2`
- *
- * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
- * console.log(key);
- * });
- * // => logs 'a' then 'b' (iteration order is not guaranteed)
- */
- function forEach(collection, iteratee) {
- return (typeof iteratee == 'function' && isArray(collection))
- ? arrayEach(collection, iteratee)
- : baseEach(collection, baseCastFunction(iteratee));
- }
-
- /**
- * This method is like `_.forEach` except that it iterates over elements of
- * `collection` from right to left.
- *
- * @static
- * @memberOf _
- * @alias eachRight
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array|Object} Returns `collection`.
- * @example
- *
- * _.forEachRight([1, 2], function(value) {
- * console.log(value);
- * });
- * // => logs `2` then `1`
- */
- function forEachRight(collection, iteratee) {
- return (typeof iteratee == 'function' && isArray(collection))
- ? arrayEachRight(collection, iteratee)
- : baseEachRight(collection, baseCastFunction(iteratee));
- }
-
- /**
- * Creates an object composed of keys generated from the results of running
- * each element of `collection` through `iteratee`. The corresponding value
- * of each key is an array of elements responsible for generating the key.
- * The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee to transform keys.
- * @returns {Object} Returns the composed aggregate object.
- * @example
- *
- * _.groupBy([6.1, 4.2, 6.3], Math.floor);
- * // => { '4': [4.2], '6': [6.1, 6.3] }
- *
- * // The `_.property` iteratee shorthand.
- * _.groupBy(['one', 'two', 'three'], 'length');
- * // => { '3': ['one', 'two'], '5': ['three'] }
- */
- var groupBy = createAggregator(function(result, value, key) {
- if (hasOwnProperty.call(result, key)) {
- result[key].push(value);
- } else {
- result[key] = [value];
- }
- });
-
- /**
- * Checks if `value` is in `collection`. If `collection` is a string it's checked
- * for a substring of `value`, otherwise [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
- * is used for equality comparisons. If `fromIndex` is negative, it's used as
- * the offset from the end of `collection`.
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object|string} collection The collection to search.
- * @param {*} value The value to search for.
- * @param {number} [fromIndex=0] The index to search from.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.reduce`.
- * @returns {boolean} Returns `true` if `value` is found, else `false`.
- * @example
- *
- * _.includes([1, 2, 3], 1);
- * // => true
- *
- * _.includes([1, 2, 3], 1, 2);
- * // => false
- *
- * _.includes({ 'user': 'fred', 'age': 40 }, 'fred');
- * // => true
- *
- * _.includes('pebbles', 'eb');
- * // => true
- */
- function includes(collection, value, fromIndex, guard) {
- collection = isArrayLike(collection) ? collection : values(collection);
- fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;
-
- var length = collection.length;
- if (fromIndex < 0) {
- fromIndex = nativeMax(length + fromIndex, 0);
- }
- return isString(collection)
- ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)
- : (!!length && baseIndexOf(collection, value, fromIndex) > -1);
- }
-
- /**
- * Invokes the method at `path` of each element in `collection`, returning
- * an array of the results of each invoked method. Any additional arguments
- * are provided to each invoked method. If `methodName` is a function it's
- * invoked for, and `this` bound to, each element in `collection`.
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Array|Function|string} path The path of the method to invoke or
- * the function invoked per iteration.
- * @param {...*} [args] The arguments to invoke each method with.
- * @returns {Array} Returns the array of results.
- * @example
- *
- * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
- * // => [[1, 5, 7], [1, 2, 3]]
- *
- * _.invokeMap([123, 456], String.prototype.split, '');
- * // => [['1', '2', '3'], ['4', '5', '6']]
- */
- var invokeMap = rest(function(collection, path, args) {
- var index = -1,
- isFunc = typeof path == 'function',
- isProp = isKey(path),
- result = isArrayLike(collection) ? Array(collection.length) : [];
-
- baseEach(collection, function(value) {
- var func = isFunc ? path : ((isProp && value != null) ? value[path] : undefined);
- result[++index] = func ? apply(func, value, args) : baseInvoke(value, path, args);
- });
- return result;
- });
-
- /**
- * Creates an object composed of keys generated from the results of running
- * each element of `collection` through `iteratee`. The corresponding value
- * of each key is the last element responsible for generating the key. The
- * iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee to transform keys.
- * @returns {Object} Returns the composed aggregate object.
- * @example
- *
- * var array = [
- * { 'dir': 'left', 'code': 97 },
- * { 'dir': 'right', 'code': 100 }
- * ];
- *
- * _.keyBy(array, function(o) {
- * return String.fromCharCode(o.code);
- * });
- * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
- *
- * _.keyBy(array, 'dir');
- * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
- */
- var keyBy = createAggregator(function(result, value, key) {
- result[key] = value;
- });
-
- /**
- * Creates an array of values by running each element in `collection` through
- * `iteratee`. The iteratee is invoked with three arguments:
- * (value, index|key, collection).
- *
- * Many lodash methods are guarded to work as iteratees for methods like
- * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
- *
- * The guarded methods are:
- * `ary`, `curry`, `curryRight`, `drop`, `dropRight`, `every`, `fill`,
- * `invert`, `parseInt`, `random`, `range`, `rangeRight`, `slice`, `some`,
- * `sortBy`, `take`, `takeRight`, `template`, `trim`, `trimEnd`, `trimStart`,
- * and `words`
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new mapped array.
- * @example
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * _.map([4, 8], square);
- * // => [16, 64]
- *
- * _.map({ 'a': 4, 'b': 8 }, square);
- * // => [16, 64] (iteration order is not guaranteed)
- *
- * var users = [
- * { 'user': 'barney' },
- * { 'user': 'fred' }
- * ];
- *
- * // The `_.property` iteratee shorthand.
- * _.map(users, 'user');
- * // => ['barney', 'fred']
- */
- function map(collection, iteratee) {
- var func = isArray(collection) ? arrayMap : baseMap;
- return func(collection, getIteratee(iteratee, 3));
- }
-
- /**
- * This method is like `_.sortBy` except that it allows specifying the sort
- * orders of the iteratees to sort by. If `orders` is unspecified, all values
- * are sorted in ascending order. Otherwise, specify an order of "desc" for
- * descending or "asc" for ascending sort order of corresponding values.
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function[]|Object[]|string[]} [iteratees=[_.identity]] The iteratees to sort by.
- * @param {string[]} [orders] The sort orders of `iteratees`.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.reduce`.
- * @returns {Array} Returns the new sorted array.
- * @example
- *
- * var users = [
- * { 'user': 'fred', 'age': 48 },
- * { 'user': 'barney', 'age': 34 },
- * { 'user': 'fred', 'age': 42 },
- * { 'user': 'barney', 'age': 36 }
- * ];
- *
- * // Sort by `user` in ascending order and by `age` in descending order.
- * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
- * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]]
- */
- function orderBy(collection, iteratees, orders, guard) {
- if (collection == null) {
- return [];
- }
- if (!isArray(iteratees)) {
- iteratees = iteratees == null ? [] : [iteratees];
- }
- orders = guard ? undefined : orders;
- if (!isArray(orders)) {
- orders = orders == null ? [] : [orders];
- }
- return baseOrderBy(collection, iteratees, orders);
- }
-
- /**
- * Creates an array of elements split into two groups, the first of which
- * contains elements `predicate` returns truthy for, the second of which
- * contains elements `predicate` returns falsey for. The predicate is
- * invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the array of grouped elements.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': false },
- * { 'user': 'fred', 'age': 40, 'active': true },
- * { 'user': 'pebbles', 'age': 1, 'active': false }
- * ];
- *
- * _.partition(users, function(o) { return o.active; });
- * // => objects for [['fred'], ['barney', 'pebbles']]
- *
- * // The `_.matches` iteratee shorthand.
- * _.partition(users, { 'age': 1, 'active': false });
- * // => objects for [['pebbles'], ['barney', 'fred']]
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.partition(users, ['active', false]);
- * // => objects for [['barney', 'pebbles'], ['fred']]
- *
- * // The `_.property` iteratee shorthand.
- * _.partition(users, 'active');
- * // => objects for [['fred'], ['barney', 'pebbles']]
- */
- var partition = createAggregator(function(result, value, key) {
- result[key ? 0 : 1].push(value);
- }, function() { return [[], []]; });
-
- /**
- * Reduces `collection` to a value which is the accumulated result of running
- * each element in `collection` through `iteratee`, where each successive
- * invocation is supplied the return value of the previous. If `accumulator`
- * is not given the first element of `collection` is used as the initial
- * value. The iteratee is invoked with four arguments:
- * (accumulator, value, index|key, collection).
- *
- * Many lodash methods are guarded to work as iteratees for methods like
- * `_.reduce`, `_.reduceRight`, and `_.transform`.
- *
- * The guarded methods are:
- * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
- * and `sortBy`
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @returns {*} Returns the accumulated value.
- * @example
- *
- * _.reduce([1, 2], function(sum, n) {
- * return sum + n;
- * }, 0);
- * // => 3
- *
- * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
- * (result[value] || (result[value] = [])).push(key);
- * return result;
- * }, {});
- * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
- */
- function reduce(collection, iteratee, accumulator) {
- var func = isArray(collection) ? arrayReduce : baseReduce,
- initAccum = arguments.length < 3;
-
- return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
- }
-
- /**
- * This method is like `_.reduce` except that it iterates over elements of
- * `collection` from right to left.
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @returns {*} Returns the accumulated value.
- * @example
- *
- * var array = [[0, 1], [2, 3], [4, 5]];
- *
- * _.reduceRight(array, function(flattened, other) {
- * return flattened.concat(other);
- * }, []);
- * // => [4, 5, 2, 3, 0, 1]
- */
- function reduceRight(collection, iteratee, accumulator) {
- var func = isArray(collection) ? arrayReduceRight : baseReduce,
- initAccum = arguments.length < 3;
-
- return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
- }
-
- /**
- * The opposite of `_.filter`; this method returns the elements of `collection`
- * that `predicate` does **not** return truthy for.
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': false },
- * { 'user': 'fred', 'age': 40, 'active': true }
- * ];
- *
- * _.reject(users, function(o) { return !o.active; });
- * // => objects for ['fred']
- *
- * // The `_.matches` iteratee shorthand.
- * _.reject(users, { 'age': 40, 'active': true });
- * // => objects for ['barney']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.reject(users, ['active', false]);
- * // => objects for ['fred']
- *
- * // The `_.property` iteratee shorthand.
- * _.reject(users, 'active');
- * // => objects for ['barney']
- */
- function reject(collection, predicate) {
- var func = isArray(collection) ? arrayFilter : baseFilter;
- predicate = getIteratee(predicate, 3);
- return func(collection, function(value, index, collection) {
- return !predicate(value, index, collection);
- });
- }
-
- /**
- * Gets a random element from `collection`.
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to sample.
- * @returns {*} Returns the random element.
- * @example
- *
- * _.sample([1, 2, 3, 4]);
- * // => 2
- */
- function sample(collection) {
- var array = isArrayLike(collection) ? collection : values(collection),
- length = array.length;
-
- return length > 0 ? array[baseRandom(0, length - 1)] : undefined;
- }
-
- /**
- * Gets `n` random elements at unique keys from `collection` up to the
- * size of `collection`.
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to sample.
- * @param {number} [n=0] The number of elements to sample.
- * @returns {Array} Returns the random elements.
- * @example
- *
- * _.sampleSize([1, 2, 3], 2);
- * // => [3, 1]
- *
- * _.sampleSize([1, 2, 3], 4);
- * // => [2, 3, 1]
- */
- function sampleSize(collection, n) {
- var index = -1,
- result = toArray(collection),
- length = result.length,
- lastIndex = length - 1;
-
- n = baseClamp(toInteger(n), 0, length);
- while (++index < n) {
- var rand = baseRandom(index, lastIndex),
- value = result[rand];
-
- result[rand] = result[index];
- result[index] = value;
- }
- result.length = n;
- return result;
- }
-
- /**
- * Creates an array of shuffled values, using a version of the
- * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to shuffle.
- * @returns {Array} Returns the new shuffled array.
- * @example
- *
- * _.shuffle([1, 2, 3, 4]);
- * // => [4, 1, 3, 2]
- */
- function shuffle(collection) {
- return sampleSize(collection, MAX_ARRAY_LENGTH);
- }
-
- /**
- * Gets the size of `collection` by returning its length for array-like
- * values or the number of own enumerable properties for objects.
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to inspect.
- * @returns {number} Returns the collection size.
- * @example
- *
- * _.size([1, 2, 3]);
- * // => 3
- *
- * _.size({ 'a': 1, 'b': 2 });
- * // => 2
- *
- * _.size('pebbles');
- * // => 7
- */
- function size(collection) {
- if (collection == null) {
- return 0;
- }
- if (isArrayLike(collection)) {
- var result = collection.length;
- return (result && isString(collection)) ? stringSize(collection) : result;
- }
- return keys(collection).length;
- }
-
- /**
- * Checks if `predicate` returns truthy for **any** element of `collection`.
- * Iteration is stopped once `predicate` returns truthy. The predicate is
- * invoked with three arguments: (value, index|key, collection).
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {boolean} Returns `true` if any element passes the predicate check, else `false`.
- * @example
- *
- * _.some([null, 0, 'yes', false], Boolean);
- * // => true
- *
- * var users = [
- * { 'user': 'barney', 'active': true },
- * { 'user': 'fred', 'active': false }
- * ];
- *
- * // The `_.matches` iteratee shorthand.
- * _.some(users, { 'user': 'barney', 'active': false });
- * // => false
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.some(users, ['active', false]);
- * // => true
- *
- * // The `_.property` iteratee shorthand.
- * _.some(users, 'active');
- * // => true
- */
- function some(collection, predicate, guard) {
- var func = isArray(collection) ? arraySome : baseSome;
- if (guard && isIterateeCall(collection, predicate, guard)) {
- predicate = undefined;
- }
- return func(collection, getIteratee(predicate, 3));
- }
-
- /**
- * Creates an array of elements, sorted in ascending order by the results of
- * running each element in a collection through each iteratee. This method
- * performs a stable sort, that is, it preserves the original sort order of
- * equal elements. The iteratees are invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {...(Function|Function[]|Object|Object[]|string|string[])} [iteratees=[_.identity]]
- * The iteratees to sort by, specified individually or in arrays.
- * @returns {Array} Returns the new sorted array.
- * @example
- *
- * var users = [
- * { 'user': 'fred', 'age': 48 },
- * { 'user': 'barney', 'age': 36 },
- * { 'user': 'fred', 'age': 42 },
- * { 'user': 'barney', 'age': 34 }
- * ];
- *
- * _.sortBy(users, function(o) { return o.user; });
- * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]]
- *
- * _.sortBy(users, ['user', 'age']);
- * // => objects for [['barney', 34], ['barney', 36], ['fred', 42], ['fred', 48]]
- *
- * _.sortBy(users, 'user', function(o) {
- * return Math.floor(o.age / 10);
- * });
- * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 42]]
- */
- var sortBy = rest(function(collection, iteratees) {
- if (collection == null) {
- return [];
- }
- var length = iteratees.length;
- if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
- iteratees = [];
- } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
- iteratees.length = 1;
- }
- return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
- });
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Gets the timestamp of the number of milliseconds that have elapsed since
- * the Unix epoch (1 January 1970 00:00:00 UTC).
- *
- * @static
- * @memberOf _
- * @type {Function}
- * @category Date
- * @returns {number} Returns the timestamp.
- * @example
- *
- * _.defer(function(stamp) {
- * console.log(_.now() - stamp);
- * }, _.now());
- * // => logs the number of milliseconds it took for the deferred function to be invoked
- */
- var now = Date.now;
-
- /*------------------------------------------------------------------------*/
-
- /**
- * The opposite of `_.before`; this method creates a function that invokes
- * `func` once it's called `n` or more times.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {number} n The number of calls before `func` is invoked.
- * @param {Function} func The function to restrict.
- * @returns {Function} Returns the new restricted function.
- * @example
- *
- * var saves = ['profile', 'settings'];
- *
- * var done = _.after(saves.length, function() {
- * console.log('done saving!');
- * });
- *
- * _.forEach(saves, function(type) {
- * asyncSave({ 'type': type, 'complete': done });
- * });
- * // => logs 'done saving!' after the two async saves have completed
- */
- function after(n, func) {
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- n = toInteger(n);
- return function() {
- if (--n < 1) {
- return func.apply(this, arguments);
- }
- };
- }
-
- /**
- * Creates a function that accepts up to `n` arguments, ignoring any
- * additional arguments.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to cap arguments for.
- * @param {number} [n=func.length] The arity cap.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {Function} Returns the new function.
- * @example
- *
- * _.map(['6', '8', '10'], _.ary(parseInt, 1));
- * // => [6, 8, 10]
- */
- function ary(func, n, guard) {
- n = guard ? undefined : n;
- n = (func && n == null) ? func.length : n;
- return createWrapper(func, ARY_FLAG, undefined, undefined, undefined, undefined, n);
- }
-
- /**
- * Creates a function that invokes `func`, with the `this` binding and arguments
- * of the created function, while it's called less than `n` times. Subsequent
- * calls to the created function return the result of the last `func` invocation.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {number} n The number of calls at which `func` is no longer invoked.
- * @param {Function} func The function to restrict.
- * @returns {Function} Returns the new restricted function.
- * @example
- *
- * jQuery(element).on('click', _.before(5, addContactToList));
- * // => allows adding up to 4 contacts to the list
- */
- function before(n, func) {
- var result;
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- n = toInteger(n);
- return function() {
- if (--n > 0) {
- result = func.apply(this, arguments);
- }
- if (n <= 1) {
- func = undefined;
- }
- return result;
- };
- }
-
- /**
- * Creates a function that invokes `func` with the `this` binding of `thisArg`
- * and prepends any additional `_.bind` arguments to those provided to the
- * bound function.
- *
- * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
- * may be used as a placeholder for partially applied arguments.
- *
- * **Note:** Unlike native `Function#bind` this method doesn't set the "length"
- * property of bound functions.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to bind.
- * @param {*} thisArg The `this` binding of `func`.
- * @param {...*} [partials] The arguments to be partially applied.
- * @returns {Function} Returns the new bound function.
- * @example
- *
- * var greet = function(greeting, punctuation) {
- * return greeting + ' ' + this.user + punctuation;
- * };
- *
- * var object = { 'user': 'fred' };
- *
- * var bound = _.bind(greet, object, 'hi');
- * bound('!');
- * // => 'hi fred!'
- *
- * // Bound with placeholders.
- * var bound = _.bind(greet, object, _, '!');
- * bound('hi');
- * // => 'hi fred!'
- */
- var bind = rest(function(func, thisArg, partials) {
- var bitmask = BIND_FLAG;
- if (partials.length) {
- var holders = replaceHolders(partials, getPlaceholder(bind));
- bitmask |= PARTIAL_FLAG;
- }
- return createWrapper(func, bitmask, thisArg, partials, holders);
- });
-
- /**
- * Creates a function that invokes the method at `object[key]` and prepends
- * any additional `_.bindKey` arguments to those provided to the bound function.
- *
- * This method differs from `_.bind` by allowing bound functions to reference
- * methods that may be redefined or don't yet exist.
- * See [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
- * for more details.
- *
- * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
- * builds, may be used as a placeholder for partially applied arguments.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Object} object The object to invoke the method on.
- * @param {string} key The key of the method.
- * @param {...*} [partials] The arguments to be partially applied.
- * @returns {Function} Returns the new bound function.
- * @example
- *
- * var object = {
- * 'user': 'fred',
- * 'greet': function(greeting, punctuation) {
- * return greeting + ' ' + this.user + punctuation;
- * }
- * };
- *
- * var bound = _.bindKey(object, 'greet', 'hi');
- * bound('!');
- * // => 'hi fred!'
- *
- * object.greet = function(greeting, punctuation) {
- * return greeting + 'ya ' + this.user + punctuation;
- * };
- *
- * bound('!');
- * // => 'hiya fred!'
- *
- * // Bound with placeholders.
- * var bound = _.bindKey(object, 'greet', _, '!');
- * bound('hi');
- * // => 'hiya fred!'
- */
- var bindKey = rest(function(object, key, partials) {
- var bitmask = BIND_FLAG | BIND_KEY_FLAG;
- if (partials.length) {
- var holders = replaceHolders(partials, getPlaceholder(bindKey));
- bitmask |= PARTIAL_FLAG;
- }
- return createWrapper(key, bitmask, object, partials, holders);
- });
-
- /**
- * Creates a function that accepts arguments of `func` and either invokes
- * `func` returning its result, if at least `arity` number of arguments have
- * been provided, or returns a function that accepts the remaining `func`
- * arguments, and so on. The arity of `func` may be specified if `func.length`
- * is not sufficient.
- *
- * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
- * may be used as a placeholder for provided arguments.
- *
- * **Note:** This method doesn't set the "length" property of curried functions.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to curry.
- * @param {number} [arity=func.length] The arity of `func`.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {Function} Returns the new curried function.
- * @example
- *
- * var abc = function(a, b, c) {
- * return [a, b, c];
- * };
- *
- * var curried = _.curry(abc);
- *
- * curried(1)(2)(3);
- * // => [1, 2, 3]
- *
- * curried(1, 2)(3);
- * // => [1, 2, 3]
- *
- * curried(1, 2, 3);
- * // => [1, 2, 3]
- *
- * // Curried with placeholders.
- * curried(1)(_, 3)(2);
- * // => [1, 2, 3]
- */
- function curry(func, arity, guard) {
- arity = guard ? undefined : arity;
- var result = createWrapper(func, CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
- result.placeholder = curry.placeholder;
- return result;
- }
-
- /**
- * This method is like `_.curry` except that arguments are applied to `func`
- * in the manner of `_.partialRight` instead of `_.partial`.
- *
- * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
- * builds, may be used as a placeholder for provided arguments.
- *
- * **Note:** This method doesn't set the "length" property of curried functions.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to curry.
- * @param {number} [arity=func.length] The arity of `func`.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {Function} Returns the new curried function.
- * @example
- *
- * var abc = function(a, b, c) {
- * return [a, b, c];
- * };
- *
- * var curried = _.curryRight(abc);
- *
- * curried(3)(2)(1);
- * // => [1, 2, 3]
- *
- * curried(2, 3)(1);
- * // => [1, 2, 3]
- *
- * curried(1, 2, 3);
- * // => [1, 2, 3]
- *
- * // Curried with placeholders.
- * curried(3)(1, _)(2);
- * // => [1, 2, 3]
- */
- function curryRight(func, arity, guard) {
- arity = guard ? undefined : arity;
- var result = createWrapper(func, CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
- result.placeholder = curryRight.placeholder;
- return result;
- }
-
- /**
- * Creates a debounced function that delays invoking `func` until after `wait`
- * milliseconds have elapsed since the last time the debounced function was
- * invoked. The debounced function comes with a `cancel` method to cancel
- * delayed `func` invocations and a `flush` method to immediately invoke them.
- * Provide an options object to indicate whether `func` should be invoked on
- * the leading and/or trailing edge of the `wait` timeout. The `func` is invoked
- * with the last arguments provided to the debounced function. Subsequent calls
- * to the debounced function return the result of the last `func` invocation.
- *
- * **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
- * on the trailing edge of the timeout only if the debounced function is
- * invoked more than once during the `wait` timeout.
- *
- * See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)
- * for details over the differences between `_.debounce` and `_.throttle`.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to debounce.
- * @param {number} [wait=0] The number of milliseconds to delay.
- * @param {Object} [options] The options object.
- * @param {boolean} [options.leading=false] Specify invoking on the leading
- * edge of the timeout.
- * @param {number} [options.maxWait] The maximum time `func` is allowed to be
- * delayed before it's invoked.
- * @param {boolean} [options.trailing=true] Specify invoking on the trailing
- * edge of the timeout.
- * @returns {Function} Returns the new debounced function.
- * @example
- *
- * // Avoid costly calculations while the window size is in flux.
- * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
- *
- * // Invoke `sendMail` when clicked, debouncing subsequent calls.
- * jQuery(element).on('click', _.debounce(sendMail, 300, {
- * 'leading': true,
- * 'trailing': false
- * }));
- *
- * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
- * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
- * var source = new EventSource('/stream');
- * jQuery(source).on('message', debounced);
- *
- * // Cancel the trailing debounced invocation.
- * jQuery(window).on('popstate', debounced.cancel);
- */
- function debounce(func, wait, options) {
- var args,
- maxTimeoutId,
- result,
- stamp,
- thisArg,
- timeoutId,
- trailingCall,
- lastCalled = 0,
- leading = false,
- maxWait = false,
- trailing = true;
-
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- wait = toNumber(wait) || 0;
- if (isObject(options)) {
- leading = !!options.leading;
- maxWait = 'maxWait' in options && nativeMax(toNumber(options.maxWait) || 0, wait);
- trailing = 'trailing' in options ? !!options.trailing : trailing;
- }
-
- function cancel() {
- if (timeoutId) {
- clearTimeout(timeoutId);
- }
- if (maxTimeoutId) {
- clearTimeout(maxTimeoutId);
- }
- lastCalled = 0;
- args = maxTimeoutId = thisArg = timeoutId = trailingCall = undefined;
- }
-
- function complete(isCalled, id) {
- if (id) {
- clearTimeout(id);
- }
- maxTimeoutId = timeoutId = trailingCall = undefined;
- if (isCalled) {
- lastCalled = now();
- result = func.apply(thisArg, args);
- if (!timeoutId && !maxTimeoutId) {
- args = thisArg = undefined;
- }
- }
- }
-
- function delayed() {
- var remaining = wait - (now() - stamp);
- if (remaining <= 0 || remaining > wait) {
- complete(trailingCall, maxTimeoutId);
- } else {
- timeoutId = setTimeout(delayed, remaining);
- }
- }
-
- function flush() {
- if ((timeoutId && trailingCall) || (maxTimeoutId && trailing)) {
- result = func.apply(thisArg, args);
- }
- cancel();
- return result;
- }
-
- function maxDelayed() {
- complete(trailing, timeoutId);
- }
-
- function debounced() {
- args = arguments;
- stamp = now();
- thisArg = this;
- trailingCall = trailing && (timeoutId || !leading);
-
- if (maxWait === false) {
- var leadingCall = leading && !timeoutId;
- } else {
- if (!lastCalled && !maxTimeoutId && !leading) {
- lastCalled = stamp;
- }
- var remaining = maxWait - (stamp - lastCalled);
-
- var isCalled = (remaining <= 0 || remaining > maxWait) &&
- (leading || maxTimeoutId);
-
- if (isCalled) {
- if (maxTimeoutId) {
- maxTimeoutId = clearTimeout(maxTimeoutId);
- }
- lastCalled = stamp;
- result = func.apply(thisArg, args);
- }
- else if (!maxTimeoutId) {
- maxTimeoutId = setTimeout(maxDelayed, remaining);
- }
- }
- if (isCalled && timeoutId) {
- timeoutId = clearTimeout(timeoutId);
- }
- else if (!timeoutId && wait !== maxWait) {
- timeoutId = setTimeout(delayed, wait);
- }
- if (leadingCall) {
- isCalled = true;
- result = func.apply(thisArg, args);
- }
- if (isCalled && !timeoutId && !maxTimeoutId) {
- args = thisArg = undefined;
- }
- return result;
- }
- debounced.cancel = cancel;
- debounced.flush = flush;
- return debounced;
- }
-
- /**
- * Defers invoking the `func` until the current call stack has cleared. Any
- * additional arguments are provided to `func` when it's invoked.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to defer.
- * @param {...*} [args] The arguments to invoke `func` with.
- * @returns {number} Returns the timer id.
- * @example
- *
- * _.defer(function(text) {
- * console.log(text);
- * }, 'deferred');
- * // => logs 'deferred' after one or more milliseconds
- */
- var defer = rest(function(func, args) {
- return baseDelay(func, 1, args);
- });
-
- /**
- * Invokes `func` after `wait` milliseconds. Any additional arguments are
- * provided to `func` when it's invoked.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to delay.
- * @param {number} wait The number of milliseconds to delay invocation.
- * @param {...*} [args] The arguments to invoke `func` with.
- * @returns {number} Returns the timer id.
- * @example
- *
- * _.delay(function(text) {
- * console.log(text);
- * }, 1000, 'later');
- * // => logs 'later' after one second
- */
- var delay = rest(function(func, wait, args) {
- return baseDelay(func, toNumber(wait) || 0, args);
- });
-
- /**
- * Creates a function that invokes `func` with arguments reversed.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to flip arguments for.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var flipped = _.flip(function() {
- * return _.toArray(arguments);
- * });
- *
- * flipped('a', 'b', 'c', 'd');
- * // => ['d', 'c', 'b', 'a']
- */
- function flip(func) {
- return createWrapper(func, FLIP_FLAG);
- }
-
- /**
- * Creates a function that memoizes the result of `func`. If `resolver` is
- * provided it determines the cache key for storing the result based on the
- * arguments provided to the memoized function. By default, the first argument
- * provided to the memoized function is used as the map cache key. The `func`
- * is invoked with the `this` binding of the memoized function.
- *
- * **Note:** The cache is exposed as the `cache` property on the memoized
- * function. Its creation may be customized by replacing the `_.memoize.Cache`
- * constructor with one whose instances implement the [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
- * method interface of `delete`, `get`, `has`, and `set`.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to have its output memoized.
- * @param {Function} [resolver] The function to resolve the cache key.
- * @returns {Function} Returns the new memoizing function.
- * @example
- *
- * var object = { 'a': 1, 'b': 2 };
- * var other = { 'c': 3, 'd': 4 };
- *
- * var values = _.memoize(_.values);
- * values(object);
- * // => [1, 2]
- *
- * values(other);
- * // => [3, 4]
- *
- * object.a = 2;
- * values(object);
- * // => [1, 2]
- *
- * // Modify the result cache.
- * values.cache.set(object, ['a', 'b']);
- * values(object);
- * // => ['a', 'b']
- *
- * // Replace `_.memoize.Cache`.
- * _.memoize.Cache = WeakMap;
- */
- function memoize(func, resolver) {
- if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- var memoized = function() {
- var args = arguments,
- key = resolver ? resolver.apply(this, args) : args[0],
- cache = memoized.cache;
-
- if (cache.has(key)) {
- return cache.get(key);
- }
- var result = func.apply(this, args);
- memoized.cache = cache.set(key, result);
- return result;
- };
- memoized.cache = new memoize.Cache;
- return memoized;
- }
-
- /**
- * Creates a function that negates the result of the predicate `func`. The
- * `func` predicate is invoked with the `this` binding and arguments of the
- * created function.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} predicate The predicate to negate.
- * @returns {Function} Returns the new function.
- * @example
- *
- * function isEven(n) {
- * return n % 2 == 0;
- * }
- *
- * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
- * // => [1, 3, 5]
- */
- function negate(predicate) {
- if (typeof predicate != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- return function() {
- return !predicate.apply(this, arguments);
- };
- }
-
- /**
- * Creates a function that is restricted to invoking `func` once. Repeat calls
- * to the function return the value of the first invocation. The `func` is
- * invoked with the `this` binding and arguments of the created function.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to restrict.
- * @returns {Function} Returns the new restricted function.
- * @example
- *
- * var initialize = _.once(createApplication);
- * initialize();
- * initialize();
- * // `initialize` invokes `createApplication` once
- */
- function once(func) {
- return before(2, func);
- }
-
- /**
- * Creates a function that invokes `func` with arguments transformed by
- * corresponding `transforms`.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to wrap.
- * @param {...(Function|Function[])} [transforms] The functions to transform
- * arguments, specified individually or in arrays.
- * @returns {Function} Returns the new function.
- * @example
- *
- * function doubled(n) {
- * return n * 2;
- * }
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * var func = _.overArgs(function(x, y) {
- * return [x, y];
- * }, square, doubled);
- *
- * func(9, 3);
- * // => [81, 6]
- *
- * func(10, 5);
- * // => [100, 10]
- */
- var overArgs = rest(function(func, transforms) {
- transforms = arrayMap(baseFlatten(transforms, 1), getIteratee());
-
- var funcsLength = transforms.length;
- return rest(function(args) {
- var index = -1,
- length = nativeMin(args.length, funcsLength);
-
- while (++index < length) {
- args[index] = transforms[index].call(this, args[index]);
- }
- return apply(func, this, args);
- });
- });
-
- /**
- * Creates a function that invokes `func` with `partial` arguments prepended
- * to those provided to the new function. This method is like `_.bind` except
- * it does **not** alter the `this` binding.
- *
- * The `_.partial.placeholder` value, which defaults to `_` in monolithic
- * builds, may be used as a placeholder for partially applied arguments.
- *
- * **Note:** This method doesn't set the "length" property of partially
- * applied functions.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to partially apply arguments to.
- * @param {...*} [partials] The arguments to be partially applied.
- * @returns {Function} Returns the new partially applied function.
- * @example
- *
- * var greet = function(greeting, name) {
- * return greeting + ' ' + name;
- * };
- *
- * var sayHelloTo = _.partial(greet, 'hello');
- * sayHelloTo('fred');
- * // => 'hello fred'
- *
- * // Partially applied with placeholders.
- * var greetFred = _.partial(greet, _, 'fred');
- * greetFred('hi');
- * // => 'hi fred'
- */
- var partial = rest(function(func, partials) {
- var holders = replaceHolders(partials, getPlaceholder(partial));
- return createWrapper(func, PARTIAL_FLAG, undefined, partials, holders);
- });
+ // ensure `new lodashWrapper` is an instance of `lodash`
+ lodashWrapper.prototype = lodash.prototype;
/**
- * This method is like `_.partial` except that partially applied arguments
- * are appended to those provided to the new function.
- *
- * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
- * builds, may be used as a placeholder for partially applied arguments.
- *
- * **Note:** This method doesn't set the "length" property of partially
- * applied functions.
+ * An object used to flag environments features.
*
* @static
* @memberOf _
- * @category Function
- * @param {Function} func The function to partially apply arguments to.
- * @param {...*} [partials] The arguments to be partially applied.
- * @returns {Function} Returns the new partially applied function.
- * @example
- *
- * var greet = function(greeting, name) {
- * return greeting + ' ' + name;
- * };
- *
- * var greetFred = _.partialRight(greet, 'fred');
- * greetFred('hi');
- * // => 'hi fred'
- *
- * // Partially applied with placeholders.
- * var sayHelloTo = _.partialRight(greet, 'hello', _);
- * sayHelloTo('fred');
- * // => 'hello fred'
+ * @type Object
*/
- var partialRight = rest(function(func, partials) {
- var holders = replaceHolders(partials, getPlaceholder(partialRight));
- return createWrapper(func, PARTIAL_RIGHT_FLAG, undefined, partials, holders);
- });
+ var support = lodash.support = {};
- /**
- * Creates a function that invokes `func` with arguments arranged according
- * to the specified indexes where the argument value at the first index is
- * provided as the first argument, the argument value at the second index is
- * provided as the second argument, and so on.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to rearrange arguments for.
- * @param {...(number|number[])} indexes The arranged argument indexes,
- * specified individually or in arrays.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var rearged = _.rearg(function(a, b, c) {
- * return [a, b, c];
- * }, 2, 0, 1);
- *
- * rearged('b', 'c', 'a')
- * // => ['a', 'b', 'c']
- */
- var rearg = rest(function(func, indexes) {
- return createWrapper(func, REARG_FLAG, undefined, undefined, undefined, baseFlatten(indexes, 1));
- });
+ (function() {
+ var ctor = function() { this.x = 1; },
+ object = { '0': 1, 'length': 1 },
+ props = [];
- /**
- * Creates a function that invokes `func` with the `this` binding of the
- * created function and arguments from `start` and beyond provided as an array.
- *
- * **Note:** This method is based on the [rest parameter](https://mdn.io/rest_parameters).
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to apply a rest parameter to.
- * @param {number} [start=func.length-1] The start position of the rest parameter.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var say = _.rest(function(what, names) {
- * return what + ' ' + _.initial(names).join(', ') +
- * (_.size(names) > 1 ? ', & ' : '') + _.last(names);
- * });
- *
- * say('hello', 'fred', 'barney', 'pebbles');
- * // => 'hello fred, barney, & pebbles'
- */
- function rest(func, start) {
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- start = nativeMax(start === undefined ? (func.length - 1) : toInteger(start), 0);
- return function() {
- var args = arguments,
- index = -1,
- length = nativeMax(args.length - start, 0),
- array = Array(length);
+ ctor.prototype = { 'valueOf': 1, 'y': 1 };
+ for (var key in new ctor) { props.push(key); }
+ for (key in arguments) { }
- while (++index < length) {
- array[index] = args[start + index];
- }
- switch (start) {
- case 0: return func.call(this, array);
- case 1: return func.call(this, args[0], array);
- case 2: return func.call(this, args[0], args[1], array);
- }
- var otherArgs = Array(start + 1);
- index = -1;
- while (++index < start) {
- otherArgs[index] = args[index];
- }
- otherArgs[start] = array;
- return apply(func, this, otherArgs);
- };
- }
+ /**
+ * Detect if an `arguments` object's [[Class]] is resolvable (all but Firefox < 4, IE < 9).
+ *
+ * @memberOf _.support
+ * @type boolean
+ */
+ support.argsClass = toString.call(arguments) == argsClass;
- /**
- * Creates a function that invokes `func` with the `this` binding of the created
- * function and an array of arguments much like [`Function#apply`](https://es5.github.io/#x15.3.4.3).
- *
- * **Note:** This method is based on the [spread operator](https://mdn.io/spread_operator).
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to spread arguments over.
- * @param {number} [start=0] The start position of the spread.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var say = _.spread(function(who, what) {
- * return who + ' says ' + what;
- * });
- *
- * say(['fred', 'hello']);
- * // => 'fred says hello'
- *
- * var numbers = Promise.all([
- * Promise.resolve(40),
- * Promise.resolve(36)
- * ]);
- *
- * numbers.then(_.spread(function(x, y) {
- * return x + y;
- * }));
- * // => a Promise of 76
- */
- function spread(func, start) {
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- start = start === undefined ? 0 : nativeMax(toInteger(start), 0);
- return rest(function(args) {
- var array = args[start],
- otherArgs = args.slice(0, start);
+ /**
+ * Detect if `arguments` objects are `Object` objects (all but Narwhal and Opera < 10.5).
+ *
+ * @memberOf _.support
+ * @type boolean
+ */
+ support.argsObject = arguments.constructor == Object && !(arguments instanceof Array);
- if (array) {
- arrayPush(otherArgs, array);
- }
- return apply(func, this, otherArgs);
- });
- }
+ /**
+ * Detect if `name` or `message` properties of `Error.prototype` are
+ * enumerable by default. (IE < 9, Safari < 5.1)
+ *
+ * @memberOf _.support
+ * @type boolean
+ */
+ support.enumErrorProps = propertyIsEnumerable.call(errorProto, 'message') || propertyIsEnumerable.call(errorProto, 'name');
- /**
- * Creates a throttled function that only invokes `func` at most once per
- * every `wait` milliseconds. The throttled function comes with a `cancel`
- * method to cancel delayed `func` invocations and a `flush` method to
- * immediately invoke them. Provide an options object to indicate whether
- * `func` should be invoked on the leading and/or trailing edge of the `wait`
- * timeout. The `func` is invoked with the last arguments provided to the
- * throttled function. Subsequent calls to the throttled function return the
- * result of the last `func` invocation.
- *
- * **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
- * on the trailing edge of the timeout only if the throttled function is
- * invoked more than once during the `wait` timeout.
- *
- * See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)
- * for details over the differences between `_.throttle` and `_.debounce`.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to throttle.
- * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
- * @param {Object} [options] The options object.
- * @param {boolean} [options.leading=true] Specify invoking on the leading
- * edge of the timeout.
- * @param {boolean} [options.trailing=true] Specify invoking on the trailing
- * edge of the timeout.
- * @returns {Function} Returns the new throttled function.
- * @example
- *
- * // Avoid excessively updating the position while scrolling.
- * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
- *
- * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
- * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
- * jQuery(element).on('click', throttled);
- *
- * // Cancel the trailing throttled invocation.
- * jQuery(window).on('popstate', throttled.cancel);
- */
- function throttle(func, wait, options) {
- var leading = true,
- trailing = true;
+ /**
+ * Detect if `prototype` properties are enumerable by default.
+ *
+ * Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1
+ * (if the prototype or a property on the prototype has been set)
+ * incorrectly sets a function's `prototype` property [[Enumerable]]
+ * value to `true`.
+ *
+ * @memberOf _.support
+ * @type boolean
+ */
+ support.enumPrototypes = propertyIsEnumerable.call(ctor, 'prototype');
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- if (isObject(options)) {
- leading = 'leading' in options ? !!options.leading : leading;
- trailing = 'trailing' in options ? !!options.trailing : trailing;
- }
- return debounce(func, wait, {
- 'leading': leading,
- 'maxWait': wait,
- 'trailing': trailing
- });
- }
+ /**
+ * Detect if functions can be decompiled by `Function#toString`
+ * (all but PS3 and older Opera mobile browsers & avoided in Windows 8 apps).
+ *
+ * @memberOf _.support
+ * @type boolean
+ */
+ support.funcDecomp = !isNative(context.WinRTError) && reThis.test(runInContext);
- /**
- * Creates a function that accepts up to one argument, ignoring any
- * additional arguments.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {Function} func The function to cap arguments for.
- * @returns {Function} Returns the new function.
- * @example
- *
- * _.map(['6', '8', '10'], _.unary(parseInt));
- * // => [6, 8, 10]
- */
- function unary(func) {
- return ary(func, 1);
- }
+ /**
+ * Detect if `Function#name` is supported (all but IE).
+ *
+ * @memberOf _.support
+ * @type boolean
+ */
+ support.funcNames = typeof Function.name == 'string';
- /**
- * Creates a function that provides `value` to the wrapper function as its
- * first argument. Any additional arguments provided to the function are
- * appended to those provided to the wrapper function. The wrapper is invoked
- * with the `this` binding of the created function.
- *
- * @static
- * @memberOf _
- * @category Function
- * @param {*} value The value to wrap.
- * @param {Function} [wrapper=identity] The wrapper function.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var p = _.wrap(_.escape, function(func, text) {
- * return '<p>' + func(text) + '</p>';
- * });
- *
- * p('fred, barney, & pebbles');
- * // => '<p>fred, barney, & pebbles</p>'
- */
- function wrap(value, wrapper) {
- wrapper = wrapper == null ? identity : wrapper;
- return partial(wrapper, value);
- }
+ /**
+ * Detect if `arguments` object indexes are non-enumerable
+ * (Firefox < 4, IE < 9, PhantomJS, Safari < 5.1).
+ *
+ * @memberOf _.support
+ * @type boolean
+ */
+ support.nonEnumArgs = key != 0;
- /*------------------------------------------------------------------------*/
+ /**
+ * Detect if properties shadowing those on `Object.prototype` are non-enumerable.
+ *
+ * In IE < 9 an objects own properties, shadowing non-enumerable ones, are
+ * made non-enumerable as well (a.k.a the JScript [[DontEnum]] bug).
+ *
+ * @memberOf _.support
+ * @type boolean
+ */
+ support.nonEnumShadows = !/valueOf/.test(props);
- /**
- * Casts `value` as an array if it's not one.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to inspect.
- * @returns {Array} Returns the cast array.
- * @example
- *
- * _.castArray(1);
- * // => [1]
- *
- * _.castArray({ 'a': 1 });
- * // => [{ 'a': 1 }]
- *
- * _.castArray('abc');
- * // => ['abc']
- *
- * _.castArray(null);
- * // => [null]
- *
- * _.castArray(undefined);
- * // => [undefined]
- *
- * _.castArray();
- * // => []
- *
- * var array = [1, 2, 3];
- * console.log(_.castArray(array) === array);
- * // => true
- */
- function castArray() {
- if (!arguments.length) {
- return [];
+ /**
+ * Detect if own properties are iterated after inherited properties (all but IE < 9).
+ *
+ * @memberOf _.support
+ * @type boolean
+ */
+ support.ownLast = props[0] != 'x';
+
+ /**
+ * Detect if `Array#shift` and `Array#splice` augment array-like objects correctly.
+ *
+ * Firefox < 10, IE compatibility mode, and IE < 9 have buggy Array `shift()`
+ * and `splice()` functions that fail to remove the last element, `value[0]`,
+ * of array-like objects even though the `length` property is set to `0`.
+ * The `shift()` method is buggy in IE 8 compatibility mode, while `splice()`
+ * is buggy regardless of mode in IE < 9 and buggy in compatibility mode in IE 9.
+ *
+ * @memberOf _.support
+ * @type boolean
+ */
+ support.spliceObjects = (arrayRef.splice.call(object, 0, 1), !object[0]);
+
+ /**
+ * Detect lack of support for accessing string characters by index.
+ *
+ * IE < 8 can't access characters by index and IE 8 can only access
+ * characters by index on string literals.
+ *
+ * @memberOf _.support
+ * @type boolean
+ */
+ support.unindexedChars = ('x'[0] + Object('x')[0]) != 'xx';
+
+ /**
+ * Detect if a DOM node's [[Class]] is resolvable (all but IE < 9)
+ * and that the JS engine errors when attempting to coerce an object to
+ * a string without a `toString` function.
+ *
+ * @memberOf _.support
+ * @type boolean
+ */
+ try {
+ support.nodeClass = !(toString.call(document) == objectClass && !({ 'toString': 0 } + ''));
+ } catch(e) {
+ support.nodeClass = true;
}
- var value = arguments[0];
- return isArray(value) ? value : [value];
- }
+ }(1));
/**
- * Creates a shallow clone of `value`.
- *
- * **Note:** This method is loosely based on the
- * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
- * and supports cloning arrays, array buffers, booleans, date objects, maps,
- * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
- * arrays. The own enumerable properties of `arguments` objects are cloned
- * as plain objects. An empty object is returned for uncloneable values such
- * as error objects, functions, DOM nodes, and WeakMaps.
+ * By default, the template delimiters used by Lo-Dash are similar to those in
+ * embedded Ruby (ERB). Change the following template settings to use alternative
+ * delimiters.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to clone.
- * @returns {*} Returns the cloned value.
- * @example
- *
- * var objects = [{ 'a': 1 }, { 'b': 2 }];
- *
- * var shallow = _.clone(objects);
- * console.log(shallow[0] === objects[0]);
- * // => true
+ * @type Object
*/
- function clone(value) {
- return baseClone(value, false, true);
- }
+ lodash.templateSettings = {
- /**
- * This method is like `_.clone` except that it accepts `customizer` which
- * is invoked to produce the cloned value. If `customizer` returns `undefined`
- * cloning is handled by the method instead. The `customizer` is invoked with
- * up to four arguments; (value [, index|key, object, stack]).
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to clone.
- * @param {Function} [customizer] The function to customize cloning.
- * @returns {*} Returns the cloned value.
- * @example
- *
- * function customizer(value) {
- * if (_.isElement(value)) {
- * return value.cloneNode(false);
- * }
- * }
- *
- * var el = _.cloneWith(document.body, customizer);
- *
- * console.log(el === document.body);
- * // => false
- * console.log(el.nodeName);
- * // => 'BODY'
- * console.log(el.childNodes.length);
- * // => 0
- */
- function cloneWith(value, customizer) {
- return baseClone(value, false, true, customizer);
- }
+ /**
+ * Used to detect `data` property values to be HTML-escaped.
+ *
+ * @memberOf _.templateSettings
+ * @type RegExp
+ */
+ 'escape': /<%-([\s\S]+?)%>/g,
- /**
- * This method is like `_.clone` except that it recursively clones `value`.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to recursively clone.
- * @returns {*} Returns the deep cloned value.
- * @example
- *
- * var objects = [{ 'a': 1 }, { 'b': 2 }];
- *
- * var deep = _.cloneDeep(objects);
- * console.log(deep[0] === objects[0]);
- * // => false
- */
- function cloneDeep(value) {
- return baseClone(value, true, true);
- }
+ /**
+ * Used to detect code to be evaluated.
+ *
+ * @memberOf _.templateSettings
+ * @type RegExp
+ */
+ 'evaluate': /<%([\s\S]+?)%>/g,
+
+ /**
+ * Used to detect `data` property values to inject.
+ *
+ * @memberOf _.templateSettings
+ * @type RegExp
+ */
+ 'interpolate': reInterpolate,
+
+ /**
+ * Used to reference the data object in the template text.
+ *
+ * @memberOf _.templateSettings
+ * @type string
+ */
+ 'variable': '',
+
+ /**
+ * Used to import variables into the compiled template.
+ *
+ * @memberOf _.templateSettings
+ * @type Object
+ */
+ 'imports': {
+
+ /**
+ * A reference to the `lodash` function.
+ *
+ * @memberOf _.templateSettings.imports
+ * @type Function
+ */
+ '_': lodash
+ }
+ };
+
+ /*--------------------------------------------------------------------------*/
+
+ /**
+ * The template used to create iterator functions.
+ *
+ * @private
+ * @param {Object} data The data object used to populate the text.
+ * @returns {string} Returns the interpolated text.
+ */
+ var iteratorTemplate = template(
+ // the `iterable` may be reassigned by the `top` snippet
+ 'var index, iterable = <%= firstArg %>, ' +
+ // assign the `result` variable an initial value
+ 'result = <%= init %>;\n' +
+ // exit early if the first argument is falsey
+ 'if (!iterable) return result;\n' +
+ // add code before the iteration branches
+ '<%= top %>;' +
+
+ // array-like iteration:
+ '<% if (array) { %>\n' +
+ 'var length = iterable.length; index = -1;\n' +
+ 'if (<%= array %>) {' +
+
+ // add support for accessing string characters by index if needed
+ ' <% if (support.unindexedChars) { %>\n' +
+ ' if (isString(iterable)) {\n' +
+ " iterable = iterable.split('')\n" +
+ ' }' +
+ ' <% } %>\n' +
+
+ // iterate over the array-like value
+ ' while (++index < length) {\n' +
+ ' <%= loop %>;\n' +
+ ' }\n' +
+ '}\n' +
+ 'else {' +
+
+ // object iteration:
+ // add support for iterating over `arguments` objects if needed
+ ' <% } else if (support.nonEnumArgs) { %>\n' +
+ ' var length = iterable.length; index = -1;\n' +
+ ' if (length && isArguments(iterable)) {\n' +
+ ' while (++index < length) {\n' +
+ " index += '';\n" +
+ ' <%= loop %>;\n' +
+ ' }\n' +
+ ' } else {' +
+ ' <% } %>' +
+
+ // avoid iterating over `prototype` properties in older Firefox, Opera, and Safari
+ ' <% if (support.enumPrototypes) { %>\n' +
+ " var skipProto = typeof iterable == 'function';\n" +
+ ' <% } %>' +
+
+ // avoid iterating over `Error.prototype` properties in older IE and Safari
+ ' <% if (support.enumErrorProps) { %>\n' +
+ ' var skipErrorProps = iterable === errorProto || iterable instanceof Error;\n' +
+ ' <% } %>' +
+
+ // define conditions used in the loop
+ ' <%' +
+ ' var conditions = [];' +
+ ' if (support.enumPrototypes) { conditions.push(\'!(skipProto && index == "prototype")\'); }' +
+ ' if (support.enumErrorProps) { conditions.push(\'!(skipErrorProps && (index == "message" || index == "name"))\'); }' +
+ ' %>' +
+
+ // iterate own properties using `Object.keys`
+ ' <% if (useHas && keys) { %>\n' +
+ ' var ownIndex = -1,\n' +
+ ' ownProps = objectTypes[typeof iterable] && keys(iterable),\n' +
+ ' length = ownProps ? ownProps.length : 0;\n\n' +
+ ' while (++ownIndex < length) {\n' +
+ ' index = ownProps[ownIndex];\n<%' +
+ " if (conditions.length) { %> if (<%= conditions.join(' && ') %>) {\n <% } %>" +
+ ' <%= loop %>;' +
+ ' <% if (conditions.length) { %>\n }<% } %>\n' +
+ ' }' +
+
+ // else using a for-in loop
+ ' <% } else { %>\n' +
+ ' for (index in iterable) {\n<%' +
+ ' if (useHas) { conditions.push("hasOwnProperty.call(iterable, index)"); }' +
+ " if (conditions.length) { %> if (<%= conditions.join(' && ') %>) {\n <% } %>" +
+ ' <%= loop %>;' +
+ ' <% if (conditions.length) { %>\n }<% } %>\n' +
+ ' }' +
+
+ // Because IE < 9 can't set the `[[Enumerable]]` attribute of an
+ // existing property and the `constructor` property of a prototype
+ // defaults to non-enumerable, Lo-Dash skips the `constructor`
+ // property when it infers it's iterating over a `prototype` object.
+ ' <% if (support.nonEnumShadows) { %>\n\n' +
+ ' if (iterable !== objectProto) {\n' +
+ " var ctor = iterable.constructor,\n" +
+ ' isProto = iterable === (ctor && ctor.prototype),\n' +
+ ' className = iterable === stringProto ? stringClass : iterable === errorProto ? errorClass : toString.call(iterable),\n' +
+ ' nonEnum = nonEnumProps[className];\n' +
+ ' <% for (k = 0; k < 7; k++) { %>\n' +
+ " index = '<%= shadowedProps[k] %>';\n" +
+ ' if ((!(isProto && nonEnum[index]) && hasOwnProperty.call(iterable, index))<%' +
+ ' if (!useHas) { %> || (!nonEnum[index] && iterable[index] !== objectProto[index])<% }' +
+ ' %>) {\n' +
+ ' <%= loop %>;\n' +
+ ' }' +
+ ' <% } %>\n' +
+ ' }' +
+ ' <% } %>' +
+ ' <% } %>' +
+ ' <% if (array || support.nonEnumArgs) { %>\n}<% } %>\n' +
+
+ // add code to the bottom of the iteration function
+ '<%= bottom %>;\n' +
+ // finally, return the `result`
+ 'return result'
+ );
+
+ /*--------------------------------------------------------------------------*/
/**
- * This method is like `_.cloneWith` except that it recursively clones `value`.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to recursively clone.
- * @param {Function} [customizer] The function to customize cloning.
- * @returns {*} Returns the deep cloned value.
- * @example
- *
- * function customizer(value) {
- * if (_.isElement(value)) {
- * return value.cloneNode(true);
- * }
- * }
+ * The base implementation of `_.bind` that creates the bound function and
+ * sets its meta data.
*
- * var el = _.cloneDeepWith(document.body, customizer);
- *
- * console.log(el === document.body);
- * // => false
- * console.log(el.nodeName);
- * // => 'BODY'
- * console.log(el.childNodes.length);
- * // => 20
+ * @private
+ * @param {Array} bindData The bind data array.
+ * @returns {Function} Returns the new bound function.
*/
- function cloneDeepWith(value, customizer) {
- return baseClone(value, true, true, customizer);
+ function baseBind(bindData) {
+ var func = bindData[0],
+ partialArgs = bindData[2],
+ thisArg = bindData[4];
+
+ function bound() {
+ // `Function#bind` spec
+ // http://es5.github.io/#x15.3.4.5
+ if (partialArgs) {
+ // avoid `arguments` object deoptimizations by using `slice` instead
+ // of `Array.prototype.slice.call` and not assigning `arguments` to a
+ // variable as a ternary expression
+ var args = slice(partialArgs);
+ push.apply(args, arguments);
+ }
+ // mimic the constructor's `return` behavior
+ // http://es5.github.io/#x13.2.2
+ if (this instanceof bound) {
+ // ensure `new bound` is an instance of `func`
+ var thisBinding = baseCreate(func.prototype),
+ result = func.apply(thisBinding, args || arguments);
+ return isObject(result) ? result : thisBinding;
+ }
+ return func.apply(thisArg, args || arguments);
+ }
+ setBindData(bound, bindData);
+ return bound;
}
/**
- * Performs a [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
- * comparison between two values to determine if they are equivalent.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
- * @example
- *
- * var object = { 'user': 'fred' };
- * var other = { 'user': 'fred' };
- *
- * _.eq(object, object);
- * // => true
- *
- * _.eq(object, other);
- * // => false
+ * The base implementation of `_.clone` without argument juggling or support
+ * for `thisArg` binding.
*
- * _.eq('a', 'a');
- * // => true
- *
- * _.eq('a', Object('a'));
- * // => false
- *
- * _.eq(NaN, NaN);
- * // => true
+ * @private
+ * @param {*} value The value to clone.
+ * @param {boolean} [isDeep=false] Specify a deep clone.
+ * @param {Function} [callback] The function to customize cloning values.
+ * @param {Array} [stackA=[]] Tracks traversed source objects.
+ * @param {Array} [stackB=[]] Associates clones with source counterparts.
+ * @returns {*} Returns the cloned value.
*/
- function eq(value, other) {
- return value === other || (value !== value && other !== other);
+ function baseClone(value, isDeep, callback, stackA, stackB) {
+ if (callback) {
+ var result = callback(value);
+ if (typeof result != 'undefined') {
+ return result;
+ }
+ }
+ // inspect [[Class]]
+ var isObj = isObject(value);
+ if (isObj) {
+ var className = toString.call(value);
+ if (!cloneableClasses[className] || (!support.nodeClass && isNode(value))) {
+ return value;
+ }
+ var ctor = ctorByClass[className];
+ switch (className) {
+ case boolClass:
+ case dateClass:
+ return new ctor(+value);
+
+ case numberClass:
+ case stringClass:
+ return new ctor(value);
+
+ case regexpClass:
+ result = ctor(value.source, reFlags.exec(value));
+ result.lastIndex = value.lastIndex;
+ return result;
+ }
+ } else {
+ return value;
+ }
+ var isArr = isArray(value);
+ if (isDeep) {
+ // check for circular references and return corresponding clone
+ var initedStack = !stackA;
+ stackA || (stackA = getArray());
+ stackB || (stackB = getArray());
+
+ var length = stackA.length;
+ while (length--) {
+ if (stackA[length] == value) {
+ return stackB[length];
+ }
+ }
+ result = isArr ? ctor(value.length) : {};
+ }
+ else {
+ result = isArr ? slice(value) : assign({}, value);
+ }
+ // add array properties assigned by `RegExp#exec`
+ if (isArr) {
+ if (hasOwnProperty.call(value, 'index')) {
+ result.index = value.index;
+ }
+ if (hasOwnProperty.call(value, 'input')) {
+ result.input = value.input;
+ }
+ }
+ // exit for shallow clone
+ if (!isDeep) {
+ return result;
+ }
+ // add the source value to the stack of traversed objects
+ // and associate it with its clone
+ stackA.push(value);
+ stackB.push(result);
+
+ // recursively populate clone (susceptible to call stack limits)
+ (isArr ? baseEach : forOwn)(value, function(objValue, key) {
+ result[key] = baseClone(objValue, isDeep, callback, stackA, stackB);
+ });
+
+ if (initedStack) {
+ releaseArray(stackA);
+ releaseArray(stackB);
+ }
+ return result;
}
/**
- * Checks if `value` is greater than `other`.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if `value` is greater than `other`, else `false`.
- * @example
- *
- * _.gt(3, 1);
- * // => true
- *
- * _.gt(3, 3);
- * // => false
+ * The base implementation of `_.create` without support for assigning
+ * properties to the created object.
*
- * _.gt(1, 3);
- * // => false
+ * @private
+ * @param {Object} prototype The object to inherit from.
+ * @returns {Object} Returns the new object.
*/
- function gt(value, other) {
- return value > other;
+ function baseCreate(prototype, properties) {
+ return isObject(prototype) ? nativeCreate(prototype) : {};
+ }
+ // fallback for browsers without `Object.create`
+ if (!nativeCreate) {
+ baseCreate = (function() {
+ function Object() {}
+ return function(prototype) {
+ if (isObject(prototype)) {
+ Object.prototype = prototype;
+ var result = new Object;
+ Object.prototype = null;
+ }
+ return result || context.Object();
+ };
+ }());
}
/**
- * Checks if `value` is greater than or equal to `other`.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if `value` is greater than or equal to `other`, else `false`.
- * @example
- *
- * _.gte(3, 1);
- * // => true
- *
- * _.gte(3, 3);
- * // => true
+ * The base implementation of `_.createCallback` without support for creating
+ * "_.pluck" or "_.where" style callbacks.
*
- * _.gte(1, 3);
- * // => false
+ * @private
+ * @param {*} [func=identity] The value to convert to a callback.
+ * @param {*} [thisArg] The `this` binding of the created callback.
+ * @param {number} [argCount] The number of arguments the callback accepts.
+ * @returns {Function} Returns a callback function.
*/
- function gte(value, other) {
- return value >= other;
+ function baseCreateCallback(func, thisArg, argCount) {
+ if (typeof func != 'function') {
+ return identity;
+ }
+ // exit early for no `thisArg` or already bound by `Function#bind`
+ if (typeof thisArg == 'undefined' || !('prototype' in func)) {
+ return func;
+ }
+ var bindData = func.__bindData__;
+ if (typeof bindData == 'undefined') {
+ if (support.funcNames) {
+ bindData = !func.name;
+ }
+ bindData = bindData || !support.funcDecomp;
+ if (!bindData) {
+ var source = fnToString.call(func);
+ if (!support.funcNames) {
+ bindData = !reFuncName.test(source);
+ }
+ if (!bindData) {
+ // checks if `func` references the `this` keyword and stores the result
+ bindData = reThis.test(source);
+ setBindData(func, bindData);
+ }
+ }
+ }
+ // exit early if there are no `this` references or `func` is bound
+ if (bindData === false || (bindData !== true && bindData[1] & 1)) {
+ return func;
+ }
+ switch (argCount) {
+ case 1: return function(value) {
+ return func.call(thisArg, value);
+ };
+ case 2: return function(a, b) {
+ return func.call(thisArg, a, b);
+ };
+ case 3: return function(value, index, collection) {
+ return func.call(thisArg, value, index, collection);
+ };
+ case 4: return function(accumulator, value, index, collection) {
+ return func.call(thisArg, accumulator, value, index, collection);
+ };
+ }
+ return bind(func, thisArg);
}
/**
- * Checks if `value` is likely an `arguments` object.
+ * The base implementation of `createWrapper` that creates the wrapper and
+ * sets its meta data.
*
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
- * @example
- *
- * _.isArguments(function() { return arguments; }());
- * // => true
- *
- * _.isArguments([1, 2, 3]);
- * // => false
+ * @private
+ * @param {Array} bindData The bind data array.
+ * @returns {Function} Returns the new function.
*/
- function isArguments(value) {
- // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
- return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
- (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
+ function baseCreateWrapper(bindData) {
+ var func = bindData[0],
+ bitmask = bindData[1],
+ partialArgs = bindData[2],
+ partialRightArgs = bindData[3],
+ thisArg = bindData[4],
+ arity = bindData[5];
+
+ var isBind = bitmask & 1,
+ isBindKey = bitmask & 2,
+ isCurry = bitmask & 4,
+ isCurryBound = bitmask & 8,
+ key = func;
+
+ function bound() {
+ var thisBinding = isBind ? thisArg : this;
+ if (partialArgs) {
+ var args = slice(partialArgs);
+ push.apply(args, arguments);
+ }
+ if (partialRightArgs || isCurry) {
+ args || (args = slice(arguments));
+ if (partialRightArgs) {
+ push.apply(args, partialRightArgs);
+ }
+ if (isCurry && args.length < arity) {
+ bitmask |= 16 & ~32;
+ return baseCreateWrapper([func, (isCurryBound ? bitmask : bitmask & ~3), args, null, thisArg, arity]);
+ }
+ }
+ args || (args = arguments);
+ if (isBindKey) {
+ func = thisBinding[key];
+ }
+ if (this instanceof bound) {
+ thisBinding = baseCreate(func.prototype);
+ var result = func.apply(thisBinding, args);
+ return isObject(result) ? result : thisBinding;
+ }
+ return func.apply(thisBinding, args);
+ }
+ setBindData(bound, bindData);
+ return bound;
}
/**
- * Checks if `value` is classified as an `Array` object.
- *
- * @static
- * @memberOf _
- * @type {Function}
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
- * @example
- *
- * _.isArray([1, 2, 3]);
- * // => true
- *
- * _.isArray(document.body.children);
- * // => false
+ * The base implementation of `_.difference` that accepts a single array
+ * of values to exclude.
*
- * _.isArray('abc');
- * // => false
- *
- * _.isArray(_.noop);
- * // => false
+ * @private
+ * @param {Array} array The array to process.
+ * @param {Array} [values] The array of values to exclude.
+ * @returns {Array} Returns a new array of filtered values.
*/
- var isArray = Array.isArray;
+ function baseDifference(array, values) {
+ var index = -1,
+ indexOf = getIndexOf(),
+ length = array ? array.length : 0,
+ isLarge = length >= largeArraySize && indexOf === baseIndexOf,
+ result = [];
- /**
- * Checks if `value` is classified as an `ArrayBuffer` object.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
- * @example
- *
- * _.isArrayBuffer(new ArrayBuffer(2));
- * // => true
- *
- * _.isArrayBuffer(new Array(2));
- * // => false
- */
- function isArrayBuffer(value) {
- return isObjectLike(value) && objectToString.call(value) == arrayBufferTag;
+ if (isLarge) {
+ var cache = createCache(values);
+ if (cache) {
+ indexOf = cacheIndexOf;
+ values = cache;
+ } else {
+ isLarge = false;
+ }
+ }
+ while (++index < length) {
+ var value = array[index];
+ if (indexOf(values, value) < 0) {
+ result.push(value);
+ }
+ }
+ if (isLarge) {
+ releaseObject(values);
+ }
+ return result;
}
/**
- * Checks if `value` is array-like. A value is considered array-like if it's
- * not a function and has a `value.length` that's an integer greater than or
- * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
- * @example
- *
- * _.isArrayLike([1, 2, 3]);
- * // => true
+ * The base implementation of `_.flatten` without support for callback
+ * shorthands or `thisArg` binding.
*
- * _.isArrayLike(document.body.children);
- * // => true
- *
- * _.isArrayLike('abc');
- * // => true
- *
- * _.isArrayLike(_.noop);
- * // => false
+ * @private
+ * @param {Array} array The array to flatten.
+ * @param {boolean} [isShallow=false] A flag to restrict flattening to a single level.
+ * @param {boolean} [isStrict=false] A flag to restrict flattening to arrays and `arguments` objects.
+ * @param {number} [fromIndex=0] The index to start from.
+ * @returns {Array} Returns a new flattened array.
*/
- function isArrayLike(value) {
- return value != null && isLength(getLength(value)) && !isFunction(value);
- }
+ function baseFlatten(array, isShallow, isStrict, fromIndex) {
+ var index = (fromIndex || 0) - 1,
+ length = array ? array.length : 0,
+ result = [];
- /**
- * This method is like `_.isArrayLike` except that it also checks if `value`
- * is an object.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an array-like object, else `false`.
- * @example
- *
- * _.isArrayLikeObject([1, 2, 3]);
- * // => true
- *
- * _.isArrayLikeObject(document.body.children);
- * // => true
- *
- * _.isArrayLikeObject('abc');
- * // => false
- *
- * _.isArrayLikeObject(_.noop);
- * // => false
- */
- function isArrayLikeObject(value) {
- return isObjectLike(value) && isArrayLike(value);
+ while (++index < length) {
+ var value = array[index];
+
+ if (value && typeof value == 'object' && typeof value.length == 'number'
+ && (isArray(value) || isArguments(value))) {
+ // recursively flatten arrays (susceptible to call stack limits)
+ if (!isShallow) {
+ value = baseFlatten(value, isShallow, isStrict);
+ }
+ var valIndex = -1,
+ valLength = value.length,
+ resIndex = result.length;
+
+ result.length += valLength;
+ while (++valIndex < valLength) {
+ result[resIndex++] = value[valIndex];
+ }
+ } else if (!isStrict) {
+ result.push(value);
+ }
+ }
+ return result;
}
/**
- * Checks if `value` is classified as a boolean primitive or object.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
- * @example
- *
- * _.isBoolean(false);
- * // => true
+ * The base implementation of `_.isEqual`, without support for `thisArg` binding,
+ * that allows partial "_.where" style comparisons.
*
- * _.isBoolean(null);
- * // => false
+ * @private
+ * @param {*} a The value to compare.
+ * @param {*} b The other value to compare.
+ * @param {Function} [callback] The function to customize comparing values.
+ * @param {Function} [isWhere=false] A flag to indicate performing partial comparisons.
+ * @param {Array} [stackA=[]] Tracks traversed `a` objects.
+ * @param {Array} [stackB=[]] Tracks traversed `b` objects.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
*/
- function isBoolean(value) {
- return value === true || value === false ||
- (isObjectLike(value) && objectToString.call(value) == boolTag);
+ function baseIsEqual(a, b, callback, isWhere, stackA, stackB) {
+ // used to indicate that when comparing objects, `a` has at least the properties of `b`
+ if (callback) {
+ var result = callback(a, b);
+ if (typeof result != 'undefined') {
+ return !!result;
+ }
+ }
+ // exit early for identical values
+ if (a === b) {
+ // treat `+0` vs. `-0` as not equal
+ return a !== 0 || (1 / a == 1 / b);
+ }
+ var type = typeof a,
+ otherType = typeof b;
+
+ // exit early for unlike primitive values
+ if (a === a &&
+ !(a && objectTypes[type]) &&
+ !(b && objectTypes[otherType])) {
+ return false;
+ }
+ // exit early for `null` and `undefined` avoiding ES3's Function#call behavior
+ // http://es5.github.io/#x15.3.4.4
+ if (a == null || b == null) {
+ return a === b;
+ }
+ // compare [[Class]] names
+ var className = toString.call(a),
+ otherClass = toString.call(b);
+
+ if (className == argsClass) {
+ className = objectClass;
+ }
+ if (otherClass == argsClass) {
+ otherClass = objectClass;
+ }
+ if (className != otherClass) {
+ return false;
+ }
+ switch (className) {
+ case boolClass:
+ case dateClass:
+ // coerce dates and booleans to numbers, dates to milliseconds and booleans
+ // to `1` or `0` treating invalid dates coerced to `NaN` as not equal
+ return +a == +b;
+
+ case numberClass:
+ // treat `NaN` vs. `NaN` as equal
+ return (a != +a)
+ ? b != +b
+ // but treat `+0` vs. `-0` as not equal
+ : (a == 0 ? (1 / a == 1 / b) : a == +b);
+
+ case regexpClass:
+ case stringClass:
+ // coerce regexes to strings (http://es5.github.io/#x15.10.6.4)
+ // treat string primitives and their corresponding object instances as equal
+ return a == String(b);
+ }
+ var isArr = className == arrayClass;
+ if (!isArr) {
+ // unwrap any `lodash` wrapped values
+ var aWrapped = hasOwnProperty.call(a, '__wrapped__'),
+ bWrapped = hasOwnProperty.call(b, '__wrapped__');
+
+ if (aWrapped || bWrapped) {
+ return baseIsEqual(aWrapped ? a.__wrapped__ : a, bWrapped ? b.__wrapped__ : b, callback, isWhere, stackA, stackB);
+ }
+ // exit for functions and DOM nodes
+ if (className != objectClass || (!support.nodeClass && (isNode(a) || isNode(b)))) {
+ return false;
+ }
+ // in older versions of Opera, `arguments` objects have `Array` constructors
+ var ctorA = !support.argsObject && isArguments(a) ? Object : a.constructor,
+ ctorB = !support.argsObject && isArguments(b) ? Object : b.constructor;
+
+ // non `Object` object instances with different constructors are not equal
+ if (ctorA != ctorB &&
+ !(isFunction(ctorA) && ctorA instanceof ctorA && isFunction(ctorB) && ctorB instanceof ctorB) &&
+ ('constructor' in a && 'constructor' in b)
+ ) {
+ return false;
+ }
+ }
+ // assume cyclic structures are equal
+ // the algorithm for detecting cyclic structures is adapted from ES 5.1
+ // section 15.12.3, abstract operation `JO` (http://es5.github.io/#x15.12.3)
+ var initedStack = !stackA;
+ stackA || (stackA = getArray());
+ stackB || (stackB = getArray());
+
+ var length = stackA.length;
+ while (length--) {
+ if (stackA[length] == a) {
+ return stackB[length] == b;
+ }
+ }
+ var size = 0;
+ result = true;
+
+ // add `a` and `b` to the stack of traversed objects
+ stackA.push(a);
+ stackB.push(b);
+
+ // recursively compare objects and arrays (susceptible to call stack limits)
+ if (isArr) {
+ // compare lengths to determine if a deep comparison is necessary
+ length = a.length;
+ size = b.length;
+ result = size == length;
+
+ if (result || isWhere) {
+ // deep compare the contents, ignoring non-numeric properties
+ while (size--) {
+ var index = length,
+ value = b[size];
+
+ if (isWhere) {
+ while (index--) {
+ if ((result = baseIsEqual(a[index], value, callback, isWhere, stackA, stackB))) {
+ break;
+ }
+ }
+ } else if (!(result = baseIsEqual(a[size], value, callback, isWhere, stackA, stackB))) {
+ break;
+ }
+ }
+ }
+ }
+ else {
+ // deep compare objects using `forIn`, instead of `forOwn`, to avoid `Object.keys`
+ // which, in this case, is more costly
+ forIn(b, function(value, key, b) {
+ if (hasOwnProperty.call(b, key)) {
+ // count the number of properties.
+ size++;
+ // deep compare each property value.
+ return (result = hasOwnProperty.call(a, key) && baseIsEqual(a[key], value, callback, isWhere, stackA, stackB));
+ }
+ });
+
+ if (result && !isWhere) {
+ // ensure both objects have the same number of properties
+ forIn(a, function(value, key, a) {
+ if (hasOwnProperty.call(a, key)) {
+ // `size` will be `-1` if `a` has more properties than `b`
+ return (result = --size > -1);
+ }
+ });
+ }
+ }
+ stackA.pop();
+ stackB.pop();
+
+ if (initedStack) {
+ releaseArray(stackA);
+ releaseArray(stackB);
+ }
+ return result;
}
/**
- * Checks if `value` is a buffer.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
- * @example
- *
- * _.isBuffer(new Buffer(2));
- * // => true
+ * The base implementation of `_.merge` without argument juggling or support
+ * for `thisArg` binding.
*
- * _.isBuffer(new Uint8Array(2));
- * // => false
- */
- var isBuffer = !Buffer ? constant(false) : function(value) {
- return value instanceof Buffer;
- };
+ * @private
+ * @param {Object} object The destination object.
+ * @param {Object} source The source object.
+ * @param {Function} [callback] The function to customize merging properties.
+ * @param {Array} [stackA=[]] Tracks traversed source objects.
+ * @param {Array} [stackB=[]] Associates values with source counterparts.
+ */
+ function baseMerge(object, source, callback, stackA, stackB) {
+ (isArray(source) ? forEach : forOwn)(source, function(source, key) {
+ var found,
+ isArr,
+ result = source,
+ value = object[key];
+
+ if (source && ((isArr = isArray(source)) || isPlainObject(source))) {
+ // avoid merging previously merged cyclic sources
+ var stackLength = stackA.length;
+ while (stackLength--) {
+ if ((found = stackA[stackLength] == source)) {
+ value = stackB[stackLength];
+ break;
+ }
+ }
+ if (!found) {
+ var isShallow;
+ if (callback) {
+ result = callback(value, source);
+ if ((isShallow = typeof result != 'undefined')) {
+ value = result;
+ }
+ }
+ if (!isShallow) {
+ value = isArr
+ ? (isArray(value) ? value : [])
+ : (isPlainObject(value) ? value : {});
+ }
+ // add `source` and associated `value` to the stack of traversed objects
+ stackA.push(source);
+ stackB.push(value);
- /**
- * Checks if `value` is classified as a `Date` object.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
- * @example
- *
- * _.isDate(new Date);
- * // => true
- *
- * _.isDate('Mon April 23 2012');
- * // => false
- */
- function isDate(value) {
- return isObjectLike(value) && objectToString.call(value) == dateTag;
+ // recursively merge objects and arrays (susceptible to call stack limits)
+ if (!isShallow) {
+ baseMerge(value, source, callback, stackA, stackB);
+ }
+ }
+ }
+ else {
+ if (callback) {
+ result = callback(value, source);
+ if (typeof result == 'undefined') {
+ result = source;
+ }
+ }
+ if (typeof result != 'undefined') {
+ value = result;
+ }
+ }
+ object[key] = value;
+ });
}
/**
- * Checks if `value` is likely a DOM element.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
- * @example
- *
- * _.isElement(document.body);
- * // => true
+ * The base implementation of `_.random` without argument juggling or support
+ * for returning floating-point numbers.
*
- * _.isElement('<body>');
- * // => false
+ * @private
+ * @param {number} min The minimum possible value.
+ * @param {number} max The maximum possible value.
+ * @returns {number} Returns a random number.
*/
- function isElement(value) {
- return !!value && value.nodeType === 1 && isObjectLike(value) && !isPlainObject(value);
+ function baseRandom(min, max) {
+ return min + floor(nativeRandom() * (max - min + 1));
}
/**
- * Checks if `value` is an empty collection or object. A value is considered
- * empty if it's an `arguments` object, array, string, or jQuery-like collection
- * with a length of `0` or has no own enumerable properties.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is empty, else `false`.
- * @example
- *
- * _.isEmpty(null);
- * // => true
- *
- * _.isEmpty(true);
- * // => true
- *
- * _.isEmpty(1);
- * // => true
+ * The base implementation of `_.uniq` without support for callback shorthands
+ * or `thisArg` binding.
*
- * _.isEmpty([1, 2, 3]);
- * // => false
- *
- * _.isEmpty({ 'a': 1 });
- * // => false
+ * @private
+ * @param {Array} array The array to process.
+ * @param {boolean} [isSorted=false] A flag to indicate that `array` is sorted.
+ * @param {Function} [callback] The function called per iteration.
+ * @returns {Array} Returns a duplicate-value-free array.
*/
- function isEmpty(value) {
- if (isArrayLike(value) &&
- (isArray(value) || isString(value) ||
- isFunction(value.splice) || isArguments(value))) {
- return !value.length;
+ function baseUniq(array, isSorted, callback) {
+ var index = -1,
+ indexOf = getIndexOf(),
+ length = array ? array.length : 0,
+ result = [];
+
+ var isLarge = !isSorted && length >= largeArraySize && indexOf === baseIndexOf,
+ seen = (callback || isLarge) ? getArray() : result;
+
+ if (isLarge) {
+ var cache = createCache(seen);
+ indexOf = cacheIndexOf;
+ seen = cache;
}
- for (var key in value) {
- if (hasOwnProperty.call(value, key)) {
- return false;
+ while (++index < length) {
+ var value = array[index],
+ computed = callback ? callback(value, index, array) : value;
+
+ if (isSorted
+ ? !index || seen[seen.length - 1] !== computed
+ : indexOf(seen, computed) < 0
+ ) {
+ if (callback || isLarge) {
+ seen.push(computed);
+ }
+ result.push(value);
}
}
- return true;
+ if (isLarge) {
+ releaseArray(seen.array);
+ releaseObject(seen);
+ } else if (callback) {
+ releaseArray(seen);
+ }
+ return result;
}
/**
- * Performs a deep comparison between two values to determine if they are
- * equivalent.
- *
- * **Note:** This method supports comparing arrays, array buffers, booleans,
- * date objects, error objects, maps, numbers, `Object` objects, regexes,
- * sets, strings, symbols, and typed arrays. `Object` objects are compared
- * by their own, not inherited, enumerable properties. Functions and DOM
- * nodes are **not** supported.
+ * Creates a function that aggregates a collection, creating an object composed
+ * of keys generated from the results of running each element of the collection
+ * through a callback. The given `setter` function sets the keys and values
+ * of the composed object.
*
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
- * @example
- *
- * var object = { 'user': 'fred' };
- * var other = { 'user': 'fred' };
- *
- * _.isEqual(object, other);
- * // => true
- *
- * object === other;
- * // => false
+ * @private
+ * @param {Function} setter The setter function.
+ * @returns {Function} Returns the new aggregator function.
*/
- function isEqual(value, other) {
- return baseIsEqual(value, other);
+ function createAggregator(setter) {
+ return function(collection, callback, thisArg) {
+ var result = {};
+ callback = lodash.createCallback(callback, thisArg, 3);
+
+ if (isArray(collection)) {
+ var index = -1,
+ length = collection.length;
+
+ while (++index < length) {
+ var value = collection[index];
+ setter(result, value, callback(value, index, collection), collection);
+ }
+ } else {
+ baseEach(collection, function(value, key, collection) {
+ setter(result, value, callback(value, key, collection), collection);
+ });
+ }
+ return result;
+ };
}
/**
- * This method is like `_.isEqual` except that it accepts `customizer` which
- * is invoked to compare values. If `customizer` returns `undefined` comparisons
- * are handled by the method instead. The `customizer` is invoked with up to
- * six arguments: (objValue, othValue [, index|key, object, other, stack]).
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @param {Function} [customizer] The function to customize comparisons.
- * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
- * @example
- *
- * function isGreeting(value) {
- * return /^h(?:i|ello)$/.test(value);
- * }
- *
- * function customizer(objValue, othValue) {
- * if (isGreeting(objValue) && isGreeting(othValue)) {
- * return true;
- * }
- * }
+ * Creates a function that, when called, either curries or invokes `func`
+ * with an optional `this` binding and partially applied arguments.
*
- * var array = ['hello', 'goodbye'];
- * var other = ['hi', 'goodbye'];
- *
- * _.isEqualWith(array, other, customizer);
- * // => true
+ * @private
+ * @param {Function|string} func The function or method name to reference.
+ * @param {number} bitmask The bitmask of method flags to compose.
+ * The bitmask may be composed of the following flags:
+ * 1 - `_.bind`
+ * 2 - `_.bindKey`
+ * 4 - `_.curry`
+ * 8 - `_.curry` (bound)
+ * 16 - `_.partial`
+ * 32 - `_.partialRight`
+ * @param {Array} [partialArgs] An array of arguments to prepend to those
+ * provided to the new function.
+ * @param {Array} [partialRightArgs] An array of arguments to append to those
+ * provided to the new function.
+ * @param {*} [thisArg] The `this` binding of `func`.
+ * @param {number} [arity] The arity of `func`.
+ * @returns {Function} Returns the new function.
*/
- function isEqualWith(value, other, customizer) {
- customizer = typeof customizer == 'function' ? customizer : undefined;
- var result = customizer ? customizer(value, other) : undefined;
- return result === undefined ? baseIsEqual(value, other, customizer) : !!result;
+ function createWrapper(func, bitmask, partialArgs, partialRightArgs, thisArg, arity) {
+ var isBind = bitmask & 1,
+ isBindKey = bitmask & 2,
+ isCurry = bitmask & 4,
+ isCurryBound = bitmask & 8,
+ isPartial = bitmask & 16,
+ isPartialRight = bitmask & 32;
+
+ if (!isBindKey && !isFunction(func)) {
+ throw new TypeError;
+ }
+ if (isPartial && !partialArgs.length) {
+ bitmask &= ~16;
+ isPartial = partialArgs = false;
+ }
+ if (isPartialRight && !partialRightArgs.length) {
+ bitmask &= ~32;
+ isPartialRight = partialRightArgs = false;
+ }
+ var bindData = func && func.__bindData__;
+ if (bindData && bindData !== true) {
+ // clone `bindData`
+ bindData = slice(bindData);
+ if (bindData[2]) {
+ bindData[2] = slice(bindData[2]);
+ }
+ if (bindData[3]) {
+ bindData[3] = slice(bindData[3]);
+ }
+ // set `thisBinding` is not previously bound
+ if (isBind && !(bindData[1] & 1)) {
+ bindData[4] = thisArg;
+ }
+ // set if previously bound but not currently (subsequent curried functions)
+ if (!isBind && bindData[1] & 1) {
+ bitmask |= 8;
+ }
+ // set curried arity if not yet set
+ if (isCurry && !(bindData[1] & 4)) {
+ bindData[5] = arity;
+ }
+ // append partial left arguments
+ if (isPartial) {
+ push.apply(bindData[2] || (bindData[2] = []), partialArgs);
+ }
+ // append partial right arguments
+ if (isPartialRight) {
+ unshift.apply(bindData[3] || (bindData[3] = []), partialRightArgs);
+ }
+ // merge flags
+ bindData[1] |= bitmask;
+ return createWrapper.apply(null, bindData);
+ }
+ // fast path for `_.bind`
+ var creater = (bitmask == 1 || bitmask === 17) ? baseBind : baseCreateWrapper;
+ return creater([func, bitmask, partialArgs, partialRightArgs, thisArg, arity]);
}
/**
- * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
- * `SyntaxError`, `TypeError`, or `URIError` object.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
- * @example
- *
- * _.isError(new Error);
- * // => true
+ * Creates compiled iteration functions.
*
- * _.isError(Error);
- * // => false
+ * @private
+ * @param {...Object} [options] The compile options object(s).
+ * @param {string} [options.array] Code to determine if the iterable is an array or array-like.
+ * @param {boolean} [options.useHas] Specify using `hasOwnProperty` checks in the object loop.
+ * @param {Function} [options.keys] A reference to `_.keys` for use in own property iteration.
+ * @param {string} [options.args] A comma separated string of iteration function arguments.
+ * @param {string} [options.top] Code to execute before the iteration branches.
+ * @param {string} [options.loop] Code to execute in the object loop.
+ * @param {string} [options.bottom] Code to execute after the iteration branches.
+ * @returns {Function} Returns the compiled function.
*/
- function isError(value) {
- if (!isObjectLike(value)) {
- return false;
+ function createIterator() {
+ // data properties
+ iteratorData.shadowedProps = shadowedProps;
+ iteratorData.support = support;
+
+ // iterator options
+ iteratorData.array = iteratorData.bottom = iteratorData.loop = iteratorData.top = '';
+ iteratorData.init = 'iterable';
+ iteratorData.useHas = true;
+
+ // merge options into a template data object
+ for (var object, index = 0; object = arguments[index]; index++) {
+ for (var key in object) {
+ iteratorData[key] = object[key];
+ }
}
- return (objectToString.call(value) == errorTag) ||
- (typeof value.message == 'string' && typeof value.name == 'string');
+ var args = iteratorData.args;
+ iteratorData.firstArg = /^[^,]+/.exec(args)[0];
+
+ // create the function factory
+ var factory = Function(
+ 'baseCreateCallback, errorClass, errorProto, hasOwnProperty, ' +
+ 'indicatorObject, isArguments, isArray, isString, keys, objectProto, ' +
+ 'objectTypes, nonEnumProps, stringClass, stringProto, toString',
+ 'return function(' + args + ') {\n' + iteratorTemplate(iteratorData) + '\n}'
+ );
+
+ // return the compiled function
+ return factory(
+ baseCreateCallback, errorClass, errorProto, hasOwnProperty,
+ indicatorObject, isArguments, isArray, isString, iteratorData.keys, objectProto,
+ objectTypes, nonEnumProps, stringClass, stringProto, toString
+ );
}
/**
- * Checks if `value` is a finite primitive number.
- *
- * **Note:** This method is based on [`Number.isFinite`](https://mdn.io/Number/isFinite).
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
- * @example
+ * Used by `escape` to convert characters to HTML entities.
*
- * _.isFinite(3);
- * // => true
- *
- * _.isFinite(Number.MAX_VALUE);
- * // => true
- *
- * _.isFinite(3.14);
- * // => true
- *
- * _.isFinite(Infinity);
- * // => false
+ * @private
+ * @param {string} match The matched character to escape.
+ * @returns {string} Returns the escaped character.
*/
- function isFinite(value) {
- return typeof value == 'number' && nativeIsFinite(value);
+ function escapeHtmlChar(match) {
+ return htmlEscapes[match];
}
/**
- * Checks if `value` is classified as a `Function` object.
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
- * @example
- *
- * _.isFunction(_);
- * // => true
+ * Gets the appropriate "indexOf" function. If the `_.indexOf` method is
+ * customized, this method returns the custom method, otherwise it returns
+ * the `baseIndexOf` function.
*
- * _.isFunction(/abc/);
- * // => false
+ * @private
+ * @returns {Function} Returns the "indexOf" function.
*/
- function isFunction(value) {
- // The use of `Object#toString` avoids issues with the `typeof` operator
- // in Safari 8 which returns 'object' for typed array and weak map constructors,
- // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
- var tag = isObject(value) ? objectToString.call(value) : '';
- return tag == funcTag || tag == genTag;
+ function getIndexOf() {
+ var result = (result = lodash.indexOf) === indexOf ? baseIndexOf : result;
+ return result;
}
/**
- * Checks if `value` is an integer.
- *
- * **Note:** This method is based on [`Number.isInteger`](https://mdn.io/Number/isInteger).
+ * Checks if `value` is a native function.
*
- * @static
- * @memberOf _
- * @category Lang
+ * @private
* @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
- * @example
- *
- * _.isInteger(3);
- * // => true
- *
- * _.isInteger(Number.MIN_VALUE);
- * // => false
- *
- * _.isInteger(Infinity);
- * // => false
- *
- * _.isInteger('3');
- * // => false
+ * @returns {boolean} Returns `true` if the `value` is a native function, else `false`.
*/
- function isInteger(value) {
- return typeof value == 'number' && value == toInteger(value);
+ function isNative(value) {
+ return typeof value == 'function' && reNative.test(value);
}
/**
- * Checks if `value` is a valid array-like length.
- *
- * **Note:** This function is loosely based on [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
- * @example
- *
- * _.isLength(3);
- * // => true
- *
- * _.isLength(Number.MIN_VALUE);
- * // => false
- *
- * _.isLength(Infinity);
- * // => false
+ * Sets `this` binding data on a given function.
*
- * _.isLength('3');
- * // => false
+ * @private
+ * @param {Function} func The function to set data on.
+ * @param {Array} value The data array to set.
*/
- function isLength(value) {
- return typeof value == 'number' &&
- value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
- }
+ var setBindData = !defineProperty ? noop : function(func, value) {
+ descriptor.value = value;
+ defineProperty(func, '__bindData__', descriptor);
+ };
/**
- * Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`.
- * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+ * A fallback implementation of `isPlainObject` which checks if a given value
+ * is an object created by the `Object` constructor, assuming objects created
+ * by the `Object` constructor have no inherited enumerable properties and that
+ * there are no `Object.prototype` extensions.
*
- * @static
- * @memberOf _
- * @category Lang
+ * @private
* @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an object, else `false`.
- * @example
- *
- * _.isObject({});
- * // => true
- *
- * _.isObject([1, 2, 3]);
- * // => true
- *
- * _.isObject(_.noop);
- * // => true
- *
- * _.isObject(null);
- * // => false
+ * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
*/
- function isObject(value) {
- var type = typeof value;
- return !!value && (type == 'object' || type == 'function');
- }
+ function shimIsPlainObject(value) {
+ var ctor,
+ result;
- /**
- * Checks if `value` is object-like. A value is object-like if it's not `null`
- * and has a `typeof` result of "object".
- *
- * @static
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
- * @example
- *
- * _.isObjectLike({});
- * // => true
- *
- * _.isObjectLike([1, 2, 3]);
- * // => true
- *
- * _.isObjectLike(_.noop);
- * // => false
+ // avoid non Object objects, `arguments` objects, and DOM elements
+ if (!(value && toString.call(value) == objectClass) ||
+ (ctor = value.constructor, isFunction(ctor) && !(ctor instanceof ctor)) ||
+ (!support.argsClass && isArguments(value)) ||
+ (!support.nodeClass && isNode(value))) {
+ return false;
+ }
+ // IE < 9 iterates inherited properties before own properties. If the first
+ // iterated property is an object's own property then there are no inherited
+ // enumerable properties.
+ if (support.ownLast) {
+ forIn(value, function(value, key, object) {
+ result = hasOwnProperty.call(object, key);
+ return false;
+ });
+ return result !== false;
+ }
+ // In most environments an object's own properties are iterated before
+ // its inherited properties. If the last iterated property is an object's
+ // own property then there are no inherited enumerable properties.
+ forIn(value, function(value, key) {
+ result = key;
+ });
+ return typeof result == 'undefined' || hasOwnProperty.call(value, result);
+ }
+
+ /**
+ * Used by `unescape` to convert HTML entities to characters.
*
- * _.isObjectLike(null);
- * // => false
+ * @private
+ * @param {string} match The matched character to unescape.
+ * @returns {string} Returns the unescaped character.
*/
- function isObjectLike(value) {
- return !!value && typeof value == 'object';
+ function unescapeHtmlChar(match) {
+ return htmlUnescapes[match];
}
+ /*--------------------------------------------------------------------------*/
+
/**
- * Checks if `value` is classified as a `Map` object.
+ * Checks if `value` is an `arguments` object.
*
* @static
* @memberOf _
- * @category Lang
+ * @category Objects
* @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @returns {boolean} Returns `true` if the `value` is an `arguments` object, else `false`.
* @example
*
- * _.isMap(new Map);
+ * (function() { return _.isArguments(arguments); })(1, 2, 3);
* // => true
*
- * _.isMap(new WeakMap);
+ * _.isArguments([1, 2, 3]);
* // => false
*/
- function isMap(value) {
- return isObjectLike(value) && getTag(value) == mapTag;
+ function isArguments(value) {
+ return value && typeof value == 'object' && typeof value.length == 'number' &&
+ toString.call(value) == argsClass || false;
+ }
+ // fallback for browsers that can't detect `arguments` objects by [[Class]]
+ if (!support.argsClass) {
+ isArguments = function(value) {
+ return value && typeof value == 'object' && typeof value.length == 'number' &&
+ hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee') || false;
+ };
}
/**
- * Performs a partial deep comparison between `object` and `source` to
- * determine if `object` contains equivalent property values. This method is
- * equivalent to a `_.matches` function when `source` is partially applied.
- *
- * **Note:** This method supports comparing the same values as `_.isEqual`.
+ * Checks if `value` is an array.
*
* @static
* @memberOf _
- * @category Lang
- * @param {Object} object The object to inspect.
- * @param {Object} source The object of property values to match.
- * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ * @type Function
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is an array, else `false`.
* @example
*
- * var object = { 'user': 'fred', 'age': 40 };
+ * (function() { return _.isArray(arguments); })();
+ * // => false
*
- * _.isMatch(object, { 'age': 40 });
+ * _.isArray([1, 2, 3]);
* // => true
+ */
+ var isArray = nativeIsArray || function(value) {
+ return value && typeof value == 'object' && typeof value.length == 'number' &&
+ toString.call(value) == arrayClass || false;
+ };
+
+ /**
+ * A fallback implementation of `Object.keys` which produces an array of the
+ * given object's own enumerable property names.
*
- * _.isMatch(object, { 'age': 36 });
- * // => false
+ * @private
+ * @type Function
+ * @param {Object} object The object to inspect.
+ * @returns {Array} Returns an array of property names.
*/
- function isMatch(object, source) {
- return object === source || baseIsMatch(object, source, getMatchData(source));
- }
+ var shimKeys = createIterator({
+ 'args': 'object',
+ 'init': '[]',
+ 'top': 'if (!(objectTypes[typeof object])) return result',
+ 'loop': 'result.push(index)'
+ });
/**
- * This method is like `_.isMatch` except that it accepts `customizer` which
- * is invoked to compare values. If `customizer` returns `undefined` comparisons
- * are handled by the method instead. The `customizer` is invoked with five
- * arguments: (objValue, srcValue, index|key, object, source).
+ * Creates an array composed of the own enumerable property names of an object.
*
* @static
* @memberOf _
- * @category Lang
+ * @category Objects
* @param {Object} object The object to inspect.
- * @param {Object} source The object of property values to match.
- * @param {Function} [customizer] The function to customize comparisons.
- * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+ * @returns {Array} Returns an array of property names.
* @example
*
- * function isGreeting(value) {
- * return /^h(?:i|ello)$/.test(value);
- * }
- *
- * function customizer(objValue, srcValue) {
- * if (isGreeting(objValue) && isGreeting(srcValue)) {
- * return true;
- * }
- * }
- *
- * var object = { 'greeting': 'hello' };
- * var source = { 'greeting': 'hi' };
+ * _.keys({ 'one': 1, 'two': 2, 'three': 3 });
+ * // => ['one', 'two', 'three'] (property order is not guaranteed across environments)
+ */
+ var keys = !nativeKeys ? shimKeys : function(object) {
+ if (!isObject(object)) {
+ return [];
+ }
+ if ((support.enumPrototypes && typeof object == 'function') ||
+ (support.nonEnumArgs && object.length && isArguments(object))) {
+ return shimKeys(object);
+ }
+ return nativeKeys(object);
+ };
+
+ /** Reusable iterator options shared by `each`, `forIn`, and `forOwn` */
+ var eachIteratorOptions = {
+ 'args': 'collection, callback, thisArg',
+ 'top': "callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3)",
+ 'array': "typeof length == 'number'",
+ 'keys': keys,
+ 'loop': 'if (callback(iterable[index], index, collection) === false) return result'
+ };
+
+ /** Reusable iterator options for `assign` and `defaults` */
+ var defaultsIteratorOptions = {
+ 'args': 'object, source, guard',
+ 'top':
+ 'var args = arguments,\n' +
+ ' argsIndex = 0,\n' +
+ " argsLength = typeof guard == 'number' ? 2 : args.length;\n" +
+ 'while (++argsIndex < argsLength) {\n' +
+ ' iterable = args[argsIndex];\n' +
+ ' if (iterable && objectTypes[typeof iterable]) {',
+ 'keys': keys,
+ 'loop': "if (typeof result[index] == 'undefined') result[index] = iterable[index]",
+ 'bottom': ' }\n}'
+ };
+
+ /** Reusable iterator options for `forIn` and `forOwn` */
+ var forOwnIteratorOptions = {
+ 'top': 'if (!objectTypes[typeof iterable]) return result;\n' + eachIteratorOptions.top,
+ 'array': false
+ };
+
+ /**
+ * Used to convert characters to HTML entities:
*
- * _.isMatchWith(object, source, customizer);
- * // => true
+ * Though the `>` character is escaped for symmetry, characters like `>` and `/`
+ * don't require escaping in HTML and have no special meaning unless they're part
+ * of a tag or an unquoted attribute value.
+ * http://mathiasbynens.be/notes/ambiguous-ampersands (under "semi-related fun fact")
*/
- function isMatchWith(object, source, customizer) {
- customizer = typeof customizer == 'function' ? customizer : undefined;
- return baseIsMatch(object, source, getMatchData(source), customizer);
- }
+ var htmlEscapes = {
+ '&': '&',
+ '<': '<',
+ '>': '>',
+ '"': '"',
+ "'": '''
+ };
+
+ /** Used to convert HTML entities to characters */
+ var htmlUnescapes = invert(htmlEscapes);
+
+ /** Used to match HTML entities and HTML characters */
+ var reEscapedHtml = RegExp('(' + keys(htmlUnescapes).join('|') + ')', 'g'),
+ reUnescapedHtml = RegExp('[' + keys(htmlEscapes).join('') + ']', 'g');
/**
- * Checks if `value` is `NaN`.
+ * A function compiled to iterate `arguments` objects, arrays, objects, and
+ * strings consistenly across environments, executing the callback for each
+ * element in the collection. The callback is bound to `thisArg` and invoked
+ * with three arguments; (value, index|key, collection). Callbacks may exit
+ * iteration early by explicitly returning `false`.
*
- * **Note:** This method is not the same as [`isNaN`](https://es5.github.io/#x15.1.2.4)
- * which returns `true` for `undefined` and other non-numeric values.
+ * @private
+ * @type Function
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function} [callback=identity] The function called per iteration.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array|Object|string} Returns `collection`.
+ */
+ var baseEach = createIterator(eachIteratorOptions);
+
+ /*--------------------------------------------------------------------------*/
+
+ /**
+ * Assigns own enumerable properties of source object(s) to the destination
+ * object. Subsequent sources will overwrite property assignments of previous
+ * sources. If a callback is provided it will be executed to produce the
+ * assigned values. The callback is bound to `thisArg` and invoked with two
+ * arguments; (objectValue, sourceValue).
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+ * @type Function
+ * @alias extend
+ * @category Objects
+ * @param {Object} object The destination object.
+ * @param {...Object} [source] The source objects.
+ * @param {Function} [callback] The function to customize assigning values.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Object} Returns the destination object.
* @example
*
- * _.isNaN(NaN);
- * // => true
- *
- * _.isNaN(new Number(NaN));
- * // => true
+ * _.assign({ 'name': 'fred' }, { 'employer': 'slate' });
+ * // => { 'name': 'fred', 'employer': 'slate' }
*
- * isNaN(undefined);
- * // => true
+ * var defaults = _.partialRight(_.assign, function(a, b) {
+ * return typeof a == 'undefined' ? b : a;
+ * });
*
- * _.isNaN(undefined);
- * // => false
- */
- function isNaN(value) {
- // An `NaN` primitive is the only value that is not equal to itself.
- // Perform the `toStringTag` check first to avoid errors with some ActiveX objects in IE.
- return isNumber(value) && value != +value;
- }
+ * var object = { 'name': 'barney' };
+ * defaults(object, { 'name': 'fred', 'employer': 'slate' });
+ * // => { 'name': 'barney', 'employer': 'slate' }
+ */
+ var assign = createIterator(defaultsIteratorOptions, {
+ 'top':
+ defaultsIteratorOptions.top.replace(';',
+ ';\n' +
+ "if (argsLength > 3 && typeof args[argsLength - 2] == 'function') {\n" +
+ ' var callback = baseCreateCallback(args[--argsLength - 1], args[argsLength--], 2);\n' +
+ "} else if (argsLength > 2 && typeof args[argsLength - 1] == 'function') {\n" +
+ ' callback = args[--argsLength];\n' +
+ '}'
+ ),
+ 'loop': 'result[index] = callback ? callback(result[index], iterable[index]) : iterable[index]'
+ });
/**
- * Checks if `value` is a native function.
+ * Creates a clone of `value`. If `isDeep` is `true` nested objects will also
+ * be cloned, otherwise they will be assigned by reference. If a callback
+ * is provided it will be executed to produce the cloned values. If the
+ * callback returns `undefined` cloning will be handled by the method instead.
+ * The callback is bound to `thisArg` and invoked with one argument; (value).
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a native function, else `false`.
+ * @category Objects
+ * @param {*} value The value to clone.
+ * @param {boolean} [isDeep=false] Specify a deep clone.
+ * @param {Function} [callback] The function to customize cloning values.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {*} Returns the cloned value.
* @example
*
- * _.isNative(Array.prototype.push);
+ * var characters = [
+ * { 'name': 'barney', 'age': 36 },
+ * { 'name': 'fred', 'age': 40 }
+ * ];
+ *
+ * var shallow = _.clone(characters);
+ * shallow[0] === characters[0];
* // => true
*
- * _.isNative(_);
+ * var deep = _.clone(characters, true);
+ * deep[0] === characters[0];
* // => false
+ *
+ * _.mixin({
+ * 'clone': _.partialRight(_.clone, function(value) {
+ * return _.isElement(value) ? value.cloneNode(false) : undefined;
+ * })
+ * });
+ *
+ * var clone = _.clone(document.body);
+ * clone.childNodes.length;
+ * // => 0
*/
- function isNative(value) {
- if (value == null) {
- return false;
- }
- if (isFunction(value)) {
- return reIsNative.test(funcToString.call(value));
+ function clone(value, isDeep, callback, thisArg) {
+ // allows working with "Collections" methods without using their `index`
+ // and `collection` arguments for `isDeep` and `callback`
+ if (typeof isDeep != 'boolean' && isDeep != null) {
+ thisArg = callback;
+ callback = isDeep;
+ isDeep = false;
}
- return isObjectLike(value) &&
- (isHostObject(value) ? reIsNative : reIsHostCtor).test(value);
+ return baseClone(value, isDeep, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));
}
/**
- * Checks if `value` is `null`.
+ * Creates a deep clone of `value`. If a callback is provided it will be
+ * executed to produce the cloned values. If the callback returns `undefined`
+ * cloning will be handled by the method instead. The callback is bound to
+ * `thisArg` and invoked with one argument; (value).
+ *
+ * Note: This method is loosely based on the structured clone algorithm. Functions
+ * and DOM nodes are **not** cloned. The enumerable properties of `arguments` objects and
+ * objects created by constructors other than `Object` are cloned to plain `Object` objects.
+ * See http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
+ * @category Objects
+ * @param {*} value The value to deep clone.
+ * @param {Function} [callback] The function to customize cloning values.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {*} Returns the deep cloned value.
* @example
*
- * _.isNull(null);
- * // => true
+ * var characters = [
+ * { 'name': 'barney', 'age': 36 },
+ * { 'name': 'fred', 'age': 40 }
+ * ];
+ *
+ * var deep = _.cloneDeep(characters);
+ * deep[0] === characters[0];
+ * // => false
+ *
+ * var view = {
+ * 'label': 'docs',
+ * 'node': element
+ * };
+ *
+ * var clone = _.cloneDeep(view, function(value) {
+ * return _.isElement(value) ? value.cloneNode(true) : undefined;
+ * });
*
- * _.isNull(void 0);
+ * clone.node == view.node;
* // => false
*/
- function isNull(value) {
- return value === null;
+ function cloneDeep(value, callback, thisArg) {
+ return baseClone(value, true, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 1));
}
/**
- * Checks if `value` is `null` or `undefined`.
+ * Creates an object that inherits from the given `prototype` object. If a
+ * `properties` object is provided its own enumerable properties are assigned
+ * to the created object.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
+ * @category Objects
+ * @param {Object} prototype The object to inherit from.
+ * @param {Object} [properties] The properties to assign to the object.
+ * @returns {Object} Returns the new object.
* @example
*
- * _.isNil(null);
- * // => true
+ * function Shape() {
+ * this.x = 0;
+ * this.y = 0;
+ * }
*
- * _.isNil(void 0);
+ * function Circle() {
+ * Shape.call(this);
+ * }
+ *
+ * Circle.prototype = _.create(Shape.prototype, { 'constructor': Circle });
+ *
+ * var circle = new Circle;
+ * circle instanceof Circle;
* // => true
*
- * _.isNil(NaN);
- * // => false
+ * circle instanceof Shape;
+ * // => true
*/
- function isNil(value) {
- return value == null;
+ function create(prototype, properties) {
+ var result = baseCreate(prototype);
+ return properties ? assign(result, properties) : result;
}
/**
- * Checks if `value` is classified as a `Number` primitive or object.
- *
- * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
- * as numbers, use the `_.isFinite` method.
+ * Assigns own enumerable properties of source object(s) to the destination
+ * object for all destination properties that resolve to `undefined`. Once a
+ * property is set, additional defaults of the same property will be ignored.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @type Function
+ * @category Objects
+ * @param {Object} object The destination object.
+ * @param {...Object} [source] The source objects.
+ * @param- {Object} [guard] Allows working with `_.reduce` without using its
+ * `key` and `object` arguments as sources.
+ * @returns {Object} Returns the destination object.
* @example
*
- * _.isNumber(3);
- * // => true
- *
- * _.isNumber(Number.MIN_VALUE);
- * // => true
- *
- * _.isNumber(Infinity);
- * // => true
- *
- * _.isNumber('3');
- * // => false
+ * var object = { 'name': 'barney' };
+ * _.defaults(object, { 'name': 'fred', 'employer': 'slate' });
+ * // => { 'name': 'barney', 'employer': 'slate' }
*/
- function isNumber(value) {
- return typeof value == 'number' ||
- (isObjectLike(value) && objectToString.call(value) == numberTag);
- }
+ var defaults = createIterator(defaultsIteratorOptions);
/**
- * Checks if `value` is a plain object, that is, an object created by the
- * `Object` constructor or one with a `[[Prototype]]` of `null`.
+ * This method is like `_.findIndex` except that it returns the key of the
+ * first element that passes the callback check, instead of the element itself.
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
+ * @category Objects
+ * @param {Object} object The object to search.
+ * @param {Function|Object|string} [callback=identity] The function called per
+ * iteration. If a property name or object is provided it will be used to
+ * create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {string|undefined} Returns the key of the found element, else `undefined`.
* @example
*
- * function Foo() {
- * this.a = 1;
- * }
- *
- * _.isPlainObject(new Foo);
- * // => false
+ * var characters = {
+ * 'barney': { 'age': 36, 'blocked': false },
+ * 'fred': { 'age': 40, 'blocked': true },
+ * 'pebbles': { 'age': 1, 'blocked': false }
+ * };
*
- * _.isPlainObject([1, 2, 3]);
- * // => false
+ * _.findKey(characters, function(chr) {
+ * return chr.age < 40;
+ * });
+ * // => 'barney' (property order is not guaranteed across environments)
*
- * _.isPlainObject({ 'x': 0, 'y': 0 });
- * // => true
+ * // using "_.where" callback shorthand
+ * _.findKey(characters, { 'age': 1 });
+ * // => 'pebbles'
*
- * _.isPlainObject(Object.create(null));
- * // => true
+ * // using "_.pluck" callback shorthand
+ * _.findKey(characters, 'blocked');
+ * // => 'fred'
*/
- function isPlainObject(value) {
- if (!isObjectLike(value) ||
- objectToString.call(value) != objectTag || isHostObject(value)) {
- return false;
- }
- var proto = getPrototypeOf(value);
- if (proto === null) {
- return true;
- }
- var Ctor = proto.constructor;
- return (typeof Ctor == 'function' &&
- Ctor instanceof Ctor && funcToString.call(Ctor) == objectCtorString);
+ function findKey(object, callback, thisArg) {
+ var result;
+ callback = lodash.createCallback(callback, thisArg, 3);
+ forOwn(object, function(value, key, object) {
+ if (callback(value, key, object)) {
+ result = key;
+ return false;
+ }
+ });
+ return result;
}
/**
- * Checks if `value` is classified as a `RegExp` object.
+ * This method is like `_.findKey` except that it iterates over elements
+ * of a `collection` in the opposite order.
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @category Objects
+ * @param {Object} object The object to search.
+ * @param {Function|Object|string} [callback=identity] The function called per
+ * iteration. If a property name or object is provided it will be used to
+ * create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {string|undefined} Returns the key of the found element, else `undefined`.
* @example
*
- * _.isRegExp(/abc/);
- * // => true
+ * var characters = {
+ * 'barney': { 'age': 36, 'blocked': true },
+ * 'fred': { 'age': 40, 'blocked': false },
+ * 'pebbles': { 'age': 1, 'blocked': true }
+ * };
*
- * _.isRegExp('/abc/');
- * // => false
+ * _.findLastKey(characters, function(chr) {
+ * return chr.age < 40;
+ * });
+ * // => returns `pebbles`, assuming `_.findKey` returns `barney`
+ *
+ * // using "_.where" callback shorthand
+ * _.findLastKey(characters, { 'age': 40 });
+ * // => 'fred'
+ *
+ * // using "_.pluck" callback shorthand
+ * _.findLastKey(characters, 'blocked');
+ * // => 'pebbles'
*/
- function isRegExp(value) {
- return isObject(value) && objectToString.call(value) == regexpTag;
+ function findLastKey(object, callback, thisArg) {
+ var result;
+ callback = lodash.createCallback(callback, thisArg, 3);
+ forOwnRight(object, function(value, key, object) {
+ if (callback(value, key, object)) {
+ result = key;
+ return false;
+ }
+ });
+ return result;
}
/**
- * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
- * double precision number which isn't the result of a rounded unsafe integer.
- *
- * **Note:** This method is based on [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
+ * Iterates over own and inherited enumerable properties of an object,
+ * executing the callback for each property. The callback is bound to `thisArg`
+ * and invoked with three arguments; (value, key, object). Callbacks may exit
+ * iteration early by explicitly returning `false`.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
+ * @type Function
+ * @category Objects
+ * @param {Object} object The object to iterate over.
+ * @param {Function} [callback=identity] The function called per iteration.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Object} Returns `object`.
* @example
*
- * _.isSafeInteger(3);
- * // => true
- *
- * _.isSafeInteger(Number.MIN_VALUE);
- * // => false
+ * function Shape() {
+ * this.x = 0;
+ * this.y = 0;
+ * }
*
- * _.isSafeInteger(Infinity);
- * // => false
+ * Shape.prototype.move = function(x, y) {
+ * this.x += x;
+ * this.y += y;
+ * };
*
- * _.isSafeInteger('3');
- * // => false
+ * _.forIn(new Shape, function(value, key) {
+ * console.log(key);
+ * });
+ * // => logs 'x', 'y', and 'move' (property order is not guaranteed across environments)
*/
- function isSafeInteger(value) {
- return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
- }
+ var forIn = createIterator(eachIteratorOptions, forOwnIteratorOptions, {
+ 'useHas': false
+ });
/**
- * Checks if `value` is classified as a `Set` object.
+ * This method is like `_.forIn` except that it iterates over elements
+ * of a `collection` in the opposite order.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @category Objects
+ * @param {Object} object The object to iterate over.
+ * @param {Function} [callback=identity] The function called per iteration.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Object} Returns `object`.
* @example
*
- * _.isSet(new Set);
- * // => true
+ * function Shape() {
+ * this.x = 0;
+ * this.y = 0;
+ * }
*
- * _.isSet(new WeakSet);
- * // => false
+ * Shape.prototype.move = function(x, y) {
+ * this.x += x;
+ * this.y += y;
+ * };
+ *
+ * _.forInRight(new Shape, function(value, key) {
+ * console.log(key);
+ * });
+ * // => logs 'move', 'y', and 'x' assuming `_.forIn ` logs 'x', 'y', and 'move'
*/
- function isSet(value) {
- return isObjectLike(value) && getTag(value) == setTag;
+ function forInRight(object, callback, thisArg) {
+ var pairs = [];
+
+ forIn(object, function(value, key) {
+ pairs.push(key, value);
+ });
+
+ var length = pairs.length;
+ callback = baseCreateCallback(callback, thisArg, 3);
+ while (length--) {
+ if (callback(pairs[length--], pairs[length], object) === false) {
+ break;
+ }
+ }
+ return object;
}
/**
- * Checks if `value` is classified as a `String` primitive or object.
+ * Iterates over own enumerable properties of an object, executing the callback
+ * for each property. The callback is bound to `thisArg` and invoked with three
+ * arguments; (value, key, object). Callbacks may exit iteration early by
+ * explicitly returning `false`.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @type Function
+ * @category Objects
+ * @param {Object} object The object to iterate over.
+ * @param {Function} [callback=identity] The function called per iteration.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Object} Returns `object`.
* @example
*
- * _.isString('abc');
- * // => true
- *
- * _.isString(1);
- * // => false
+ * _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
+ * console.log(key);
+ * });
+ * // => logs '0', '1', and 'length' (property order is not guaranteed across environments)
*/
- function isString(value) {
- return typeof value == 'string' ||
- (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
- }
+ var forOwn = createIterator(eachIteratorOptions, forOwnIteratorOptions);
/**
- * Checks if `value` is classified as a `Symbol` primitive or object.
+ * This method is like `_.forOwn` except that it iterates over elements
+ * of a `collection` in the opposite order.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @category Objects
+ * @param {Object} object The object to iterate over.
+ * @param {Function} [callback=identity] The function called per iteration.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Object} Returns `object`.
* @example
*
- * _.isSymbol(Symbol.iterator);
- * // => true
- *
- * _.isSymbol('abc');
- * // => false
+ * _.forOwnRight({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
+ * console.log(key);
+ * });
+ * // => logs 'length', '1', and '0' assuming `_.forOwn` logs '0', '1', and 'length'
*/
- function isSymbol(value) {
- return typeof value == 'symbol' ||
- (isObjectLike(value) && objectToString.call(value) == symbolTag);
+ function forOwnRight(object, callback, thisArg) {
+ var props = keys(object),
+ length = props.length;
+
+ callback = baseCreateCallback(callback, thisArg, 3);
+ while (length--) {
+ var key = props[length];
+ if (callback(object[key], key, object) === false) {
+ break;
+ }
+ }
+ return object;
}
/**
- * Checks if `value` is classified as a typed array.
+ * Creates a sorted array of property names of all enumerable properties,
+ * own and inherited, of `object` that have function values.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @alias methods
+ * @category Objects
+ * @param {Object} object The object to inspect.
+ * @returns {Array} Returns an array of property names that have function values.
* @example
*
- * _.isTypedArray(new Uint8Array);
- * // => true
- *
- * _.isTypedArray([]);
- * // => false
+ * _.functions(_);
+ * // => ['all', 'any', 'bind', 'bindAll', 'clone', 'compact', 'compose', ...]
*/
- function isTypedArray(value) {
- return isObjectLike(value) &&
- isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
+ function functions(object) {
+ var result = [];
+ forIn(object, function(value, key) {
+ if (isFunction(value)) {
+ result.push(key);
+ }
+ });
+ return result.sort();
}
/**
- * Checks if `value` is `undefined`.
+ * Checks if the specified property name exists as a direct property of `object`,
+ * instead of an inherited property.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
+ * @category Objects
+ * @param {Object} object The object to inspect.
+ * @param {string} key The name of the property to check.
+ * @returns {boolean} Returns `true` if key is a direct property, else `false`.
* @example
*
- * _.isUndefined(void 0);
+ * _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b');
* // => true
- *
- * _.isUndefined(null);
- * // => false
*/
- function isUndefined(value) {
- return value === undefined;
+ function has(object, key) {
+ return object ? hasOwnProperty.call(object, key) : false;
}
/**
- * Checks if `value` is classified as a `WeakMap` object.
+ * Creates an object composed of the inverted keys and values of the given object.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @category Objects
+ * @param {Object} object The object to invert.
+ * @returns {Object} Returns the created inverted object.
* @example
*
- * _.isWeakMap(new WeakMap);
- * // => true
- *
- * _.isWeakMap(new Map);
- * // => false
+ * _.invert({ 'first': 'fred', 'second': 'barney' });
+ * // => { 'fred': 'first', 'barney': 'second' }
*/
- function isWeakMap(value) {
- return isObjectLike(value) && getTag(value) == weakMapTag;
+ function invert(object) {
+ var index = -1,
+ props = keys(object),
+ length = props.length,
+ result = {};
+
+ while (++index < length) {
+ var key = props[index];
+ result[object[key]] = key;
+ }
+ return result;
}
/**
- * Checks if `value` is classified as a `WeakSet` object.
+ * Checks if `value` is a boolean value.
*
* @static
* @memberOf _
- * @category Lang
+ * @category Objects
* @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
+ * @returns {boolean} Returns `true` if the `value` is a boolean value, else `false`.
* @example
*
- * _.isWeakSet(new WeakSet);
- * // => true
- *
- * _.isWeakSet(new Set);
+ * _.isBoolean(null);
* // => false
*/
- function isWeakSet(value) {
- return isObjectLike(value) && objectToString.call(value) == weakSetTag;
+ function isBoolean(value) {
+ return value === true || value === false ||
+ value && typeof value == 'object' && toString.call(value) == boolClass || false;
}
/**
- * Checks if `value` is less than `other`.
+ * Checks if `value` is a date.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if `value` is less than `other`, else `false`.
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is a date, else `false`.
* @example
*
- * _.lt(1, 3);
+ * _.isDate(new Date);
* // => true
- *
- * _.lt(3, 3);
- * // => false
- *
- * _.lt(3, 1);
- * // => false
*/
- function lt(value, other) {
- return value < other;
+ function isDate(value) {
+ return value && typeof value == 'object' && toString.call(value) == dateClass || false;
}
/**
- * Checks if `value` is less than or equal to `other`.
+ * Checks if `value` is a DOM element.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if `value` is less than or equal to `other`, else `false`.
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is a DOM element, else `false`.
* @example
*
- * _.lte(1, 3);
- * // => true
- *
- * _.lte(3, 3);
+ * _.isElement(document.body);
* // => true
- *
- * _.lte(3, 1);
- * // => false
*/
- function lte(value, other) {
- return value <= other;
+ function isElement(value) {
+ return value && value.nodeType === 1 || false;
}
/**
- * Converts `value` to an array.
+ * Checks if `value` is empty. Arrays, strings, or `arguments` objects with a
+ * length of `0` and objects with no own enumerable properties are considered
+ * "empty".
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {Array} Returns the converted array.
+ * @category Objects
+ * @param {Array|Object|string} value The value to inspect.
+ * @returns {boolean} Returns `true` if the `value` is empty, else `false`.
* @example
*
- * _.toArray({ 'a': 1, 'b': 2 });
- * // => [1, 2]
- *
- * _.toArray('abc');
- * // => ['a', 'b', 'c']
+ * _.isEmpty([1, 2, 3]);
+ * // => false
*
- * _.toArray(1);
- * // => []
+ * _.isEmpty({});
+ * // => true
*
- * _.toArray(null);
- * // => []
+ * _.isEmpty('');
+ * // => true
*/
- function toArray(value) {
+ function isEmpty(value) {
+ var result = true;
if (!value) {
- return [];
- }
- if (isArrayLike(value)) {
- return isString(value) ? stringToArray(value) : copyArray(value);
- }
- if (iteratorSymbol && value[iteratorSymbol]) {
- return iteratorToArray(value[iteratorSymbol]());
+ return result;
}
- var tag = getTag(value),
- func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);
+ var className = toString.call(value),
+ length = value.length;
- return func(value);
+ if ((className == arrayClass || className == stringClass ||
+ (support.argsClass ? className == argsClass : isArguments(value))) ||
+ (className == objectClass && typeof length == 'number' && isFunction(value.splice))) {
+ return !length;
+ }
+ forOwn(value, function() {
+ return (result = false);
+ });
+ return result;
}
/**
- * Converts `value` to an integer.
- *
- * **Note:** This function is loosely based on [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger).
+ * Performs a deep comparison between two values to determine if they are
+ * equivalent to each other. If a callback is provided it will be executed
+ * to compare values. If the callback returns `undefined` comparisons will
+ * be handled by the method instead. The callback is bound to `thisArg` and
+ * invoked with two arguments; (a, b).
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {number} Returns the converted integer.
+ * @category Objects
+ * @param {*} a The value to compare.
+ * @param {*} b The other value to compare.
+ * @param {Function} [callback] The function to customize comparing values.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
* @example
*
- * _.toInteger(3);
- * // => 3
+ * var object = { 'name': 'fred' };
+ * var copy = { 'name': 'fred' };
*
- * _.toInteger(Number.MIN_VALUE);
- * // => 0
+ * object == copy;
+ * // => false
+ *
+ * _.isEqual(object, copy);
+ * // => true
*
- * _.toInteger(Infinity);
- * // => 1.7976931348623157e+308
+ * var words = ['hello', 'goodbye'];
+ * var otherWords = ['hi', 'goodbye'];
*
- * _.toInteger('3');
- * // => 3
+ * _.isEqual(words, otherWords, function(a, b) {
+ * var reGreet = /^(?:hello|hi)$/i,
+ * aGreet = _.isString(a) && reGreet.test(a),
+ * bGreet = _.isString(b) && reGreet.test(b);
+ *
+ * return (aGreet || bGreet) ? (aGreet == bGreet) : undefined;
+ * });
+ * // => true
*/
- function toInteger(value) {
- if (!value) {
- return value === 0 ? value : 0;
- }
- value = toNumber(value);
- if (value === INFINITY || value === -INFINITY) {
- var sign = (value < 0 ? -1 : 1);
- return sign * MAX_INTEGER;
- }
- var remainder = value % 1;
- return value === value ? (remainder ? value - remainder : value) : 0;
+ function isEqual(a, b, callback, thisArg) {
+ return baseIsEqual(a, b, typeof callback == 'function' && baseCreateCallback(callback, thisArg, 2));
}
/**
- * Converts `value` to an integer suitable for use as the length of an
- * array-like object.
+ * Checks if `value` is, or can be coerced to, a finite number.
*
- * **Note:** This method is based on [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
+ * Note: This is not the same as native `isFinite` which will return true for
+ * booleans and empty strings. See http://es5.github.io/#x15.1.2.5.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {number} Returns the converted integer.
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is finite, else `false`.
* @example
*
- * _.toLength(3);
- * // => 3
+ * _.isFinite(-101);
+ * // => true
*
- * _.toLength(Number.MIN_VALUE);
- * // => 0
+ * _.isFinite('10');
+ * // => true
*
- * _.toLength(Infinity);
- * // => 4294967295
+ * _.isFinite(true);
+ * // => false
*
- * _.toLength('3');
- * // => 3
+ * _.isFinite('');
+ * // => false
+ *
+ * _.isFinite(Infinity);
+ * // => false
*/
- function toLength(value) {
- return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
+ function isFinite(value) {
+ return nativeIsFinite(value) && !nativeIsNaN(parseFloat(value));
}
/**
- * Converts `value` to a number.
+ * Checks if `value` is a function.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to process.
- * @returns {number} Returns the number.
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is a function, else `false`.
* @example
*
- * _.toNumber(3);
- * // => 3
- *
- * _.toNumber(Number.MIN_VALUE);
- * // => 5e-324
- *
- * _.toNumber(Infinity);
- * // => Infinity
- *
- * _.toNumber('3');
- * // => 3
+ * _.isFunction(_);
+ * // => true
*/
- function toNumber(value) {
- if (isObject(value)) {
- var other = isFunction(value.valueOf) ? value.valueOf() : value;
- value = isObject(other) ? (other + '') : other;
- }
- if (typeof value != 'string') {
- return value === 0 ? value : +value;
- }
- value = value.replace(reTrim, '');
- var isBinary = reIsBinary.test(value);
- return (isBinary || reIsOctal.test(value))
- ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
- : (reIsBadHex.test(value) ? NAN : +value);
+ function isFunction(value) {
+ return typeof value == 'function';
+ }
+ // fallback for older versions of Chrome and Safari
+ if (isFunction(/x/)) {
+ isFunction = function(value) {
+ return typeof value == 'function' && toString.call(value) == funcClass;
+ };
}
/**
- * Converts `value` to a plain object flattening inherited enumerable
- * properties of `value` to own properties of the plain object.
+ * Checks if `value` is the language type of Object.
+ * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {Object} Returns the converted plain object.
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is an object, else `false`.
* @example
*
- * function Foo() {
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
+ * _.isObject({});
+ * // => true
*
- * _.assign({ 'a': 1 }, new Foo);
- * // => { 'a': 1, 'b': 2 }
+ * _.isObject([1, 2, 3]);
+ * // => true
*
- * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
- * // => { 'a': 1, 'b': 2, 'c': 3 }
+ * _.isObject(1);
+ * // => false
*/
- function toPlainObject(value) {
- return copyObject(value, keysIn(value));
+ function isObject(value) {
+ // check if the value is the ECMAScript language type of Object
+ // http://es5.github.io/#x8
+ // and avoid a V8 bug
+ // http://code.google.com/p/v8/issues/detail?id=2291
+ return !!(value && objectTypes[typeof value]);
}
/**
- * Converts `value` to a safe integer. A safe integer can be compared and
- * represented correctly.
+ * Checks if `value` is `NaN`.
+ *
+ * Note: This is not the same as native `isNaN` which will return `true` for
+ * `undefined` and other non-numeric values. See http://es5.github.io/#x15.1.2.4.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {number} Returns the converted integer.
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is `NaN`, else `false`.
* @example
*
- * _.toSafeInteger(3);
- * // => 3
+ * _.isNaN(NaN);
+ * // => true
*
- * _.toSafeInteger(Number.MIN_VALUE);
- * // => 0
+ * _.isNaN(new Number(NaN));
+ * // => true
*
- * _.toSafeInteger(Infinity);
- * // => 9007199254740991
+ * isNaN(undefined);
+ * // => true
*
- * _.toSafeInteger('3');
- * // => 3
+ * _.isNaN(undefined);
+ * // => false
*/
- function toSafeInteger(value) {
- return baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER);
+ function isNaN(value) {
+ // `NaN` as a primitive is the only value that is not equal to itself
+ // (perform the [[Class]] check first to avoid errors with some host objects in IE)
+ return isNumber(value) && value != +value;
}
/**
- * Converts `value` to a string if it's not one. An empty string is returned
- * for `null` and `undefined` values. The sign of `-0` is preserved.
+ * Checks if `value` is `null`.
*
* @static
* @memberOf _
- * @category Lang
- * @param {*} value The value to process.
- * @returns {string} Returns the string.
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is `null`, else `false`.
* @example
*
- * _.toString(null);
- * // => ''
- *
- * _.toString(-0);
- * // => '-0'
+ * _.isNull(null);
+ * // => true
*
- * _.toString([1, 2, 3]);
- * // => '1,2,3'
+ * _.isNull(undefined);
+ * // => false
*/
- function toString(value) {
- // Exit early for strings to avoid a performance hit in some environments.
- if (typeof value == 'string') {
- return value;
- }
- if (value == null) {
- return '';
- }
- if (isSymbol(value)) {
- return symbolToString ? symbolToString.call(value) : '';
- }
- var result = (value + '');
- return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+ function isNull(value) {
+ return value === null;
}
- /*------------------------------------------------------------------------*/
-
/**
- * Assigns own enumerable properties of source objects to the destination
- * object. Source objects are applied from left to right. Subsequent sources
- * overwrite property assignments of previous sources.
+ * Checks if `value` is a number.
*
- * **Note:** This method mutates `object` and is loosely based on
- * [`Object.assign`](https://mdn.io/Object/assign).
+ * Note: `NaN` is considered a number. See http://es5.github.io/#x8.5.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} [sources] The source objects.
- * @returns {Object} Returns `object`.
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is a number, else `false`.
* @example
*
- * function Foo() {
- * this.c = 3;
- * }
- *
- * function Bar() {
- * this.e = 5;
- * }
- *
- * Foo.prototype.d = 4;
- * Bar.prototype.f = 6;
- *
- * _.assign({ 'a': 1 }, new Foo, new Bar);
- * // => { 'a': 1, 'c': 3, 'e': 5 }
+ * _.isNumber(8.4 * 5);
+ * // => true
*/
- var assign = createAssigner(function(object, source) {
- if (nonEnumShadows || isPrototype(source) || isArrayLike(source)) {
- copyObject(source, keys(source), object);
- return;
- }
- for (var key in source) {
- if (hasOwnProperty.call(source, key)) {
- assignValue(object, key, source[key]);
- }
- }
- });
+ function isNumber(value) {
+ return typeof value == 'number' ||
+ value && typeof value == 'object' && toString.call(value) == numberClass || false;
+ }
/**
- * This method is like `_.assign` except that it iterates over own and
- * inherited source properties.
- *
- * **Note:** This method mutates `object`.
+ * Checks if `value` is an object created by the `Object` constructor.
*
* @static
* @memberOf _
- * @alias extend
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} [sources] The source objects.
- * @returns {Object} Returns `object`.
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
* @example
*
- * function Foo() {
- * this.b = 2;
+ * function Shape() {
+ * this.x = 0;
+ * this.y = 0;
* }
*
- * function Bar() {
- * this.d = 4;
- * }
+ * _.isPlainObject(new Shape);
+ * // => false
*
- * Foo.prototype.c = 3;
- * Bar.prototype.e = 5;
+ * _.isPlainObject([1, 2, 3]);
+ * // => false
*
- * _.assignIn({ 'a': 1 }, new Foo, new Bar);
- * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5 }
+ * _.isPlainObject({ 'x': 0, 'y': 0 });
+ * // => true
*/
- var assignIn = createAssigner(function(object, source) {
- if (nonEnumShadows || isPrototype(source) || isArrayLike(source)) {
- copyObject(source, keysIn(source), object);
- return;
- }
- for (var key in source) {
- assignValue(object, key, source[key]);
+ var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) {
+ if (!(value && toString.call(value) == objectClass) || (!support.argsClass && isArguments(value))) {
+ return false;
}
- });
+ var valueOf = value.valueOf,
+ objProto = isNative(valueOf) && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto);
+
+ return objProto
+ ? (value == objProto || getPrototypeOf(value) == objProto)
+ : shimIsPlainObject(value);
+ };
/**
- * This method is like `_.assignIn` except that it accepts `customizer` which
- * is invoked to produce the assigned values. If `customizer` returns `undefined`
- * assignment is handled by the method instead. The `customizer` is invoked
- * with five arguments: (objValue, srcValue, key, object, source).
- *
- * **Note:** This method mutates `object`.
+ * Checks if `value` is a regular expression.
*
* @static
* @memberOf _
- * @alias extendWith
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} sources The source objects.
- * @param {Function} [customizer] The function to customize assigned values.
- * @returns {Object} Returns `object`.
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is a regular expression, else `false`.
* @example
*
- * function customizer(objValue, srcValue) {
- * return _.isUndefined(objValue) ? srcValue : objValue;
- * }
- *
- * var defaults = _.partialRight(_.assignInWith, customizer);
- *
- * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
- * // => { 'a': 1, 'b': 2 }
+ * _.isRegExp(/fred/);
+ * // => true
*/
- var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
- copyObjectWith(source, keysIn(source), object, customizer);
- });
+ function isRegExp(value) {
+ return value && objectTypes[typeof value] && toString.call(value) == regexpClass || false;
+ }
/**
- * This method is like `_.assign` except that it accepts `customizer` which
- * is invoked to produce the assigned values. If `customizer` returns `undefined`
- * assignment is handled by the method instead. The `customizer` is invoked
- * with five arguments: (objValue, srcValue, key, object, source).
- *
- * **Note:** This method mutates `object`.
+ * Checks if `value` is a string.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} sources The source objects.
- * @param {Function} [customizer] The function to customize assigned values.
- * @returns {Object} Returns `object`.
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is a string, else `false`.
* @example
*
- * function customizer(objValue, srcValue) {
- * return _.isUndefined(objValue) ? srcValue : objValue;
- * }
+ * _.isString('fred');
+ * // => true
+ */
+ function isString(value) {
+ return typeof value == 'string' ||
+ value && typeof value == 'object' && toString.call(value) == stringClass || false;
+ }
+
+ /**
+ * Checks if `value` is `undefined`.
*
- * var defaults = _.partialRight(_.assignWith, customizer);
+ * @static
+ * @memberOf _
+ * @category Objects
+ * @param {*} value The value to check.
+ * @returns {boolean} Returns `true` if the `value` is `undefined`, else `false`.
+ * @example
*
- * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
- * // => { 'a': 1, 'b': 2 }
+ * _.isUndefined(void 0);
+ * // => true
*/
- var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
- copyObjectWith(source, keys(source), object, customizer);
- });
+ function isUndefined(value) {
+ return typeof value == 'undefined';
+ }
/**
- * Creates an array of values corresponding to `paths` of `object`.
+ * Creates an object with the same keys as `object` and values generated by
+ * running each own enumerable property of `object` through the callback.
+ * The callback is bound to `thisArg` and invoked with three arguments;
+ * (value, key, object).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
+ * @category Objects
* @param {Object} object The object to iterate over.
- * @param {...(string|string[])} [paths] The property paths of elements to pick,
- * specified individually or in arrays.
- * @returns {Array} Returns the new array of picked elements.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array} Returns a new object with values of the results of each `callback` execution.
* @example
*
- * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
+ * _.mapValues({ 'a': 1, 'b': 2, 'c': 3} , function(num) { return num * 3; });
+ * // => { 'a': 3, 'b': 6, 'c': 9 }
*
- * _.at(object, ['a[0].b.c', 'a[1]']);
- * // => [3, 4]
+ * var characters = {
+ * 'fred': { 'name': 'fred', 'age': 40 },
+ * 'pebbles': { 'name': 'pebbles', 'age': 1 }
+ * };
*
- * _.at(['a', 'b', 'c'], 0, 2);
- * // => ['a', 'c']
+ * // using "_.pluck" callback shorthand
+ * _.mapValues(characters, 'age');
+ * // => { 'fred': 40, 'pebbles': 1 }
*/
- var at = rest(function(object, paths) {
- return baseAt(object, baseFlatten(paths, 1));
- });
+ function mapValues(object, callback, thisArg) {
+ var result = {};
+ callback = lodash.createCallback(callback, thisArg, 3);
+
+ forOwn(object, function(value, key, object) {
+ result[key] = callback(value, key, object);
+ });
+ return result;
+ }
/**
- * Creates an object that inherits from the `prototype` object. If a `properties`
- * object is given its own enumerable properties are assigned to the created object.
+ * Recursively merges own enumerable properties of the source object(s), that
+ * don't resolve to `undefined` into the destination object. Subsequent sources
+ * will overwrite property assignments of previous sources. If a callback is
+ * provided it will be executed to produce the merged values of the destination
+ * and source properties. If the callback returns `undefined` merging will
+ * be handled by the method instead. The callback is bound to `thisArg` and
+ * invoked with two arguments; (objectValue, sourceValue).
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} prototype The object to inherit from.
- * @param {Object} [properties] The properties to assign to the object.
- * @returns {Object} Returns the new object.
+ * @category Objects
+ * @param {Object} object The destination object.
+ * @param {...Object} [source] The source objects.
+ * @param {Function} [callback] The function to customize merging properties.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Object} Returns the destination object.
* @example
*
- * function Shape() {
- * this.x = 0;
- * this.y = 0;
- * }
+ * var names = {
+ * 'characters': [
+ * { 'name': 'barney' },
+ * { 'name': 'fred' }
+ * ]
+ * };
*
- * function Circle() {
- * Shape.call(this);
- * }
+ * var ages = {
+ * 'characters': [
+ * { 'age': 36 },
+ * { 'age': 40 }
+ * ]
+ * };
*
- * Circle.prototype = _.create(Shape.prototype, {
- * 'constructor': Circle
- * });
+ * _.merge(names, ages);
+ * // => { 'characters': [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred', 'age': 40 }] }
*
- * var circle = new Circle;
- * circle instanceof Circle;
- * // => true
+ * var food = {
+ * 'fruits': ['apple'],
+ * 'vegetables': ['beet']
+ * };
*
- * circle instanceof Shape;
- * // => true
+ * var otherFood = {
+ * 'fruits': ['banana'],
+ * 'vegetables': ['carrot']
+ * };
+ *
+ * _.merge(food, otherFood, function(a, b) {
+ * return _.isArray(a) ? a.concat(b) : undefined;
+ * });
+ * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot] }
*/
- function create(prototype, properties) {
- var result = baseCreate(prototype);
- return properties ? baseAssign(result, properties) : result;
+ function merge(object) {
+ var args = arguments,
+ length = 2;
+
+ if (!isObject(object)) {
+ return object;
+ }
+ // allows working with `_.reduce` and `_.reduceRight` without using
+ // their `index` and `collection` arguments
+ if (typeof args[2] != 'number') {
+ length = args.length;
+ }
+ if (length > 3 && typeof args[length - 2] == 'function') {
+ var callback = baseCreateCallback(args[--length - 1], args[length--], 2);
+ } else if (length > 2 && typeof args[length - 1] == 'function') {
+ callback = args[--length];
+ }
+ var sources = slice(arguments, 1, length),
+ index = -1,
+ stackA = getArray(),
+ stackB = getArray();
+
+ while (++index < length) {
+ baseMerge(object, sources[index], callback, stackA, stackB);
+ }
+ releaseArray(stackA);
+ releaseArray(stackB);
+ return object;
}
/**
- * Assigns own and inherited enumerable properties of source objects to the
- * destination object for all destination properties that resolve to `undefined`.
- * Source objects are applied from left to right. Once a property is set,
- * additional values of the same property are ignored.
- *
- * **Note:** This method mutates `object`.
+ * Creates a shallow clone of `object` excluding the specified properties.
+ * Property names may be specified as individual arguments or as arrays of
+ * property names. If a callback is provided it will be executed for each
+ * property of `object` omitting the properties the callback returns truey
+ * for. The callback is bound to `thisArg` and invoked with three arguments;
+ * (value, key, object).
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} [sources] The source objects.
- * @returns {Object} Returns `object`.
+ * @category Objects
+ * @param {Object} object The source object.
+ * @param {Function|...string|string[]} [callback] The properties to omit or the
+ * function called per iteration.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Object} Returns an object without the omitted properties.
* @example
*
- * _.defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred' });
- * // => { 'user': 'barney', 'age': 36 }
+ * _.omit({ 'name': 'fred', 'age': 40 }, 'age');
+ * // => { 'name': 'fred' }
+ *
+ * _.omit({ 'name': 'fred', 'age': 40 }, function(value) {
+ * return typeof value == 'number';
+ * });
+ * // => { 'name': 'fred' }
*/
- var defaults = rest(function(args) {
- args.push(undefined, assignInDefaults);
- return apply(assignInWith, undefined, args);
- });
+ function omit(object, callback, thisArg) {
+ var result = {};
+ if (typeof callback != 'function') {
+ var props = [];
+ forIn(object, function(value, key) {
+ props.push(key);
+ });
+ props = baseDifference(props, baseFlatten(arguments, true, false, 1));
+
+ var index = -1,
+ length = props.length;
+
+ while (++index < length) {
+ var key = props[index];
+ result[key] = object[key];
+ }
+ } else {
+ callback = lodash.createCallback(callback, thisArg, 3);
+ forIn(object, function(value, key, object) {
+ if (!callback(value, key, object)) {
+ result[key] = value;
+ }
+ });
+ }
+ return result;
+ }
/**
- * This method is like `_.defaults` except that it recursively assigns
- * default properties.
- *
- * **Note:** This method mutates `object`.
+ * Creates a two dimensional array of an object's key-value pairs,
+ * i.e. `[[key1, value1], [key2, value2]]`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} [sources] The source objects.
- * @returns {Object} Returns `object`.
+ * @category Objects
+ * @param {Object} object The object to inspect.
+ * @returns {Array} Returns new array of key-value pairs.
* @example
*
- * _.defaultsDeep({ 'user': { 'name': 'barney' } }, { 'user': { 'name': 'fred', 'age': 36 } });
- * // => { 'user': { 'name': 'barney', 'age': 36 } }
- *
+ * _.pairs({ 'barney': 36, 'fred': 40 });
+ * // => [['barney', 36], ['fred', 40]] (property order is not guaranteed across environments)
*/
- var defaultsDeep = rest(function(args) {
- args.push(undefined, mergeDefaults);
- return apply(mergeWith, undefined, args);
- });
+ function pairs(object) {
+ var index = -1,
+ props = keys(object),
+ length = props.length,
+ result = Array(length);
+
+ while (++index < length) {
+ var key = props[index];
+ result[index] = [key, object[key]];
+ }
+ return result;
+ }
/**
- * This method is like `_.find` except that it returns the key of the first
- * element `predicate` returns truthy for instead of the element itself.
+ * Creates a shallow clone of `object` composed of the specified properties.
+ * Property names may be specified as individual arguments or as arrays of
+ * property names. If a callback is provided it will be executed for each
+ * property of `object` picking the properties the callback returns truey
+ * for. The callback is bound to `thisArg` and invoked with three arguments;
+ * (value, key, object).
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to search.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {string|undefined} Returns the key of the matched element, else `undefined`.
+ * @category Objects
+ * @param {Object} object The source object.
+ * @param {Function|...string|string[]} [callback] The function called per
+ * iteration or property names to pick, specified as individual property
+ * names or arrays of property names.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Object} Returns an object composed of the picked properties.
* @example
*
- * var users = {
- * 'barney': { 'age': 36, 'active': true },
- * 'fred': { 'age': 40, 'active': false },
- * 'pebbles': { 'age': 1, 'active': true }
- * };
- *
- * _.findKey(users, function(o) { return o.age < 40; });
- * // => 'barney' (iteration order is not guaranteed)
- *
- * // The `_.matches` iteratee shorthand.
- * _.findKey(users, { 'age': 1, 'active': true });
- * // => 'pebbles'
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.findKey(users, ['active', false]);
- * // => 'fred'
+ * _.pick({ 'name': 'fred', '_userid': 'fred1' }, 'name');
+ * // => { 'name': 'fred' }
*
- * // The `_.property` iteratee shorthand.
- * _.findKey(users, 'active');
- * // => 'barney'
+ * _.pick({ 'name': 'fred', '_userid': 'fred1' }, function(value, key) {
+ * return key.charAt(0) != '_';
+ * });
+ * // => { 'name': 'fred' }
*/
- function findKey(object, predicate) {
- return baseFind(object, getIteratee(predicate, 3), baseForOwn, true);
+ function pick(object, callback, thisArg) {
+ var result = {};
+ if (typeof callback != 'function') {
+ var index = -1,
+ props = baseFlatten(arguments, true, false, 1),
+ length = isObject(object) ? props.length : 0;
+
+ while (++index < length) {
+ var key = props[index];
+ if (key in object) {
+ result[key] = object[key];
+ }
+ }
+ } else {
+ callback = lodash.createCallback(callback, thisArg, 3);
+ forIn(object, function(value, key, object) {
+ if (callback(value, key, object)) {
+ result[key] = value;
+ }
+ });
+ }
+ return result;
}
/**
- * This method is like `_.findKey` except that it iterates over elements of
- * a collection in the opposite order.
+ * An alternative to `_.reduce` this method transforms `object` to a new
+ * `accumulator` object which is the result of running each of its own
+ * enumerable properties through a callback, with each callback execution
+ * potentially mutating the `accumulator` object. The callback is bound to
+ * `thisArg` and invoked with four arguments; (accumulator, value, key, object).
+ * Callbacks may exit iteration early by explicitly returning `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to search.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
- * @returns {string|undefined} Returns the key of the matched element, else `undefined`.
+ * @category Objects
+ * @param {Array|Object} object The object to iterate over.
+ * @param {Function} [callback=identity] The function called per iteration.
+ * @param {*} [accumulator] The custom accumulator value.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {*} Returns the accumulated value.
* @example
*
- * var users = {
- * 'barney': { 'age': 36, 'active': true },
- * 'fred': { 'age': 40, 'active': false },
- * 'pebbles': { 'age': 1, 'active': true }
- * };
- *
- * _.findLastKey(users, function(o) { return o.age < 40; });
- * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
- *
- * // The `_.matches` iteratee shorthand.
- * _.findLastKey(users, { 'age': 36, 'active': true });
- * // => 'barney'
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.findLastKey(users, ['active', false]);
- * // => 'fred'
+ * var squares = _.transform([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], function(result, num) {
+ * num *= num;
+ * if (num % 2) {
+ * return result.push(num) < 3;
+ * }
+ * });
+ * // => [1, 9, 25]
*
- * // The `_.property` iteratee shorthand.
- * _.findLastKey(users, 'active');
- * // => 'pebbles'
+ * var mapped = _.transform({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) {
+ * result[key] = num * 3;
+ * });
+ * // => { 'a': 3, 'b': 6, 'c': 9 }
*/
- function findLastKey(object, predicate) {
- return baseFind(object, getIteratee(predicate, 3), baseForOwnRight, true);
+ function transform(object, callback, accumulator, thisArg) {
+ var isArr = isArray(object);
+ if (accumulator == null) {
+ if (isArr) {
+ accumulator = [];
+ } else {
+ var ctor = object && object.constructor,
+ proto = ctor && ctor.prototype;
+
+ accumulator = baseCreate(proto);
+ }
+ }
+ if (callback) {
+ callback = lodash.createCallback(callback, thisArg, 4);
+ (isArr ? baseEach : forOwn)(object, function(value, index, object) {
+ return callback(accumulator, value, index, object);
+ });
+ }
+ return accumulator;
}
/**
- * Iterates over own and inherited enumerable properties of an object invoking
- * `iteratee` for each property. The iteratee is invoked with three arguments:
- * (value, key, object). Iteratee functions may exit iteration early by explicitly
- * returning `false`.
+ * Creates an array composed of the own enumerable property values of `object`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns `object`.
+ * @category Objects
+ * @param {Object} object The object to inspect.
+ * @returns {Array} Returns an array of property values.
* @example
*
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.forIn(new Foo, function(value, key) {
- * console.log(key);
- * });
- * // => logs 'a', 'b', then 'c' (iteration order is not guaranteed)
+ * _.values({ 'one': 1, 'two': 2, 'three': 3 });
+ * // => [1, 2, 3] (property order is not guaranteed across environments)
*/
- function forIn(object, iteratee) {
- return object == null
- ? object
- : baseFor(object, baseCastFunction(iteratee), keysIn);
+ function values(object) {
+ var index = -1,
+ props = keys(object),
+ length = props.length,
+ result = Array(length);
+
+ while (++index < length) {
+ result[index] = object[props[index]];
+ }
+ return result;
}
+ /*--------------------------------------------------------------------------*/
+
/**
- * This method is like `_.forIn` except that it iterates over properties of
- * `object` in the opposite order.
+ * Creates an array of elements from the specified indexes, or keys, of the
+ * `collection`. Indexes may be specified as individual arguments or as arrays
+ * of indexes.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns `object`.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {...(number|number[]|string|string[])} [index] The indexes of `collection`
+ * to retrieve, specified as individual indexes or arrays of indexes.
+ * @returns {Array} Returns a new array of elements corresponding to the
+ * provided indexes.
* @example
*
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
+ * _.at(['a', 'b', 'c', 'd', 'e'], [0, 2, 4]);
+ * // => ['a', 'c', 'e']
*
- * _.forInRight(new Foo, function(value, key) {
- * console.log(key);
- * });
- * // => logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'
+ * _.at(['fred', 'barney', 'pebbles'], 0, 2);
+ * // => ['fred', 'pebbles']
*/
- function forInRight(object, iteratee) {
- return object == null
- ? object
- : baseForRight(object, baseCastFunction(iteratee), keysIn);
+ function at(collection) {
+ var args = arguments,
+ index = -1,
+ props = baseFlatten(args, true, false, 1),
+ length = (args[2] && args[2][args[1]] === collection) ? 1 : props.length,
+ result = Array(length);
+
+ if (support.unindexedChars && isString(collection)) {
+ collection = collection.split('');
+ }
+ while(++index < length) {
+ result[index] = collection[props[index]];
+ }
+ return result;
}
/**
- * Iterates over own enumerable properties of an object invoking `iteratee`
- * for each property. The iteratee is invoked with three arguments:
- * (value, key, object). Iteratee functions may exit iteration early by
- * explicitly returning `false`.
+ * Checks if a given value is present in a collection using strict equality
+ * for comparisons, i.e. `===`. If `fromIndex` is negative, it is used as the
+ * offset from the end of the collection.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns `object`.
+ * @alias include
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {*} target The value to check for.
+ * @param {number} [fromIndex=0] The index to search from.
+ * @returns {boolean} Returns `true` if the `target` element is found, else `false`.
* @example
*
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
+ * _.contains([1, 2, 3], 1);
+ * // => true
*
- * Foo.prototype.c = 3;
+ * _.contains([1, 2, 3], 1, 2);
+ * // => false
*
- * _.forOwn(new Foo, function(value, key) {
- * console.log(key);
- * });
- * // => logs 'a' then 'b' (iteration order is not guaranteed)
+ * _.contains({ 'name': 'fred', 'age': 40 }, 'fred');
+ * // => true
+ *
+ * _.contains('pebbles', 'eb');
+ * // => true
*/
- function forOwn(object, iteratee) {
- return object && baseForOwn(object, baseCastFunction(iteratee));
+ function contains(collection, target, fromIndex) {
+ var index = -1,
+ indexOf = getIndexOf(),
+ length = collection ? collection.length : 0,
+ result = false;
+
+ fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex) || 0;
+ if (isArray(collection)) {
+ result = indexOf(collection, target, fromIndex) > -1;
+ } else if (typeof length == 'number') {
+ result = (isString(collection) ? collection.indexOf(target, fromIndex) : indexOf(collection, target, fromIndex)) > -1;
+ } else {
+ baseEach(collection, function(value) {
+ if (++index >= fromIndex) {
+ return !(result = value === target);
+ }
+ });
+ }
+ return result;
}
/**
- * This method is like `_.forOwn` except that it iterates over properties of
- * `object` in the opposite order.
+ * Creates an object composed of keys generated from the results of running
+ * each element of `collection` through the callback. The corresponding value
+ * of each key is the number of times the key was returned by the callback.
+ * The callback is bound to `thisArg` and invoked with three arguments;
+ * (value, index|key, collection).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns `object`.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Object} Returns the composed aggregate object.
* @example
*
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
+ * _.countBy([4.3, 6.1, 6.4], function(num) { return Math.floor(num); });
+ * // => { '4': 1, '6': 2 }
*
- * Foo.prototype.c = 3;
+ * _.countBy([4.3, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
+ * // => { '4': 1, '6': 2 }
*
- * _.forOwnRight(new Foo, function(value, key) {
- * console.log(key);
- * });
- * // => logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'
+ * _.countBy(['one', 'two', 'three'], 'length');
+ * // => { '3': 2, '5': 1 }
*/
- function forOwnRight(object, iteratee) {
- return object && baseForOwnRight(object, baseCastFunction(iteratee));
- }
+ var countBy = createAggregator(function(result, value, key) {
+ (hasOwnProperty.call(result, key) ? result[key]++ : result[key] = 1);
+ });
/**
- * Creates an array of function property names from own enumerable properties
- * of `object`.
+ * Checks if the given callback returns truey value for **all** elements of
+ * a collection. The callback is bound to `thisArg` and invoked with three
+ * arguments; (value, index|key, collection).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to inspect.
- * @returns {Array} Returns the new array of property names.
+ * @alias all
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {boolean} Returns `true` if all elements passed the callback check,
+ * else `false`.
* @example
*
- * function Foo() {
- * this.a = _.constant('a');
- * this.b = _.constant('b');
- * }
+ * _.every([true, 1, null, 'yes']);
+ * // => false
+ *
+ * var characters = [
+ * { 'name': 'barney', 'age': 36 },
+ * { 'name': 'fred', 'age': 40 }
+ * ];
*
- * Foo.prototype.c = _.constant('c');
+ * // using "_.pluck" callback shorthand
+ * _.every(characters, 'age');
+ * // => true
*
- * _.functions(new Foo);
- * // => ['a', 'b']
+ * // using "_.where" callback shorthand
+ * _.every(characters, { 'age': 36 });
+ * // => false
*/
- function functions(object) {
- return object == null ? [] : baseFunctions(object, keys(object));
+ function every(collection, callback, thisArg) {
+ var result = true;
+ callback = lodash.createCallback(callback, thisArg, 3);
+
+ if (isArray(collection)) {
+ var index = -1,
+ length = collection.length;
+
+ while (++index < length) {
+ if (!(result = !!callback(collection[index], index, collection))) {
+ break;
+ }
+ }
+ } else {
+ baseEach(collection, function(value, index, collection) {
+ return (result = !!callback(value, index, collection));
+ });
+ }
+ return result;
}
/**
- * Creates an array of function property names from own and inherited
- * enumerable properties of `object`.
+ * Iterates over elements of a collection, returning an array of all elements
+ * the callback returns truey for. The callback is bound to `thisArg` and
+ * invoked with three arguments; (value, index|key, collection).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to inspect.
- * @returns {Array} Returns the new array of property names.
+ * @alias select
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array} Returns a new array of elements that passed the callback check.
* @example
*
- * function Foo() {
- * this.a = _.constant('a');
- * this.b = _.constant('b');
- * }
+ * var evens = _.filter([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
+ * // => [2, 4, 6]
*
- * Foo.prototype.c = _.constant('c');
+ * var characters = [
+ * { 'name': 'barney', 'age': 36, 'blocked': false },
+ * { 'name': 'fred', 'age': 40, 'blocked': true }
+ * ];
+ *
+ * // using "_.pluck" callback shorthand
+ * _.filter(characters, 'blocked');
+ * // => [{ 'name': 'fred', 'age': 40, 'blocked': true }]
*
- * _.functionsIn(new Foo);
- * // => ['a', 'b', 'c']
+ * // using "_.where" callback shorthand
+ * _.filter(characters, { 'age': 36 });
+ * // => [{ 'name': 'barney', 'age': 36, 'blocked': false }]
*/
- function functionsIn(object) {
- return object == null ? [] : baseFunctions(object, keysIn(object));
+ function filter(collection, callback, thisArg) {
+ var result = [];
+ callback = lodash.createCallback(callback, thisArg, 3);
+
+ if (isArray(collection)) {
+ var index = -1,
+ length = collection.length;
+
+ while (++index < length) {
+ var value = collection[index];
+ if (callback(value, index, collection)) {
+ result.push(value);
+ }
+ }
+ } else {
+ baseEach(collection, function(value, index, collection) {
+ if (callback(value, index, collection)) {
+ result.push(value);
+ }
+ });
+ }
+ return result;
}
/**
- * Gets the value at `path` of `object`. If the resolved value is
- * `undefined` the `defaultValue` is used in its place.
+ * Iterates over elements of a collection, returning the first element that
+ * the callback returns truey for. The callback is bound to `thisArg` and
+ * invoked with three arguments; (value, index|key, collection).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the property to get.
- * @param {*} [defaultValue] The value returned if the resolved value is `undefined`.
- * @returns {*} Returns the resolved value.
+ * @alias detect, findWhere
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {*} Returns the found element, else `undefined`.
* @example
*
- * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ * var characters = [
+ * { 'name': 'barney', 'age': 36, 'blocked': false },
+ * { 'name': 'fred', 'age': 40, 'blocked': true },
+ * { 'name': 'pebbles', 'age': 1, 'blocked': false }
+ * ];
*
- * _.get(object, 'a[0].b.c');
- * // => 3
+ * _.find(characters, function(chr) {
+ * return chr.age < 40;
+ * });
+ * // => { 'name': 'barney', 'age': 36, 'blocked': false }
*
- * _.get(object, ['a', '0', 'b', 'c']);
- * // => 3
+ * // using "_.where" callback shorthand
+ * _.find(characters, { 'age': 1 });
+ * // => { 'name': 'pebbles', 'age': 1, 'blocked': false }
*
- * _.get(object, 'a.b.c', 'default');
- * // => 'default'
+ * // using "_.pluck" callback shorthand
+ * _.find(characters, 'blocked');
+ * // => { 'name': 'fred', 'age': 40, 'blocked': true }
*/
- function get(object, path, defaultValue) {
- var result = object == null ? undefined : baseGet(object, path);
- return result === undefined ? defaultValue : result;
+ function find(collection, callback, thisArg) {
+ callback = lodash.createCallback(callback, thisArg, 3);
+
+ if (isArray(collection)) {
+ var index = -1,
+ length = collection.length;
+
+ while (++index < length) {
+ var value = collection[index];
+ if (callback(value, index, collection)) {
+ return value;
+ }
+ }
+ } else {
+ var result;
+ baseEach(collection, function(value, index, collection) {
+ if (callback(value, index, collection)) {
+ result = value;
+ return false;
+ }
+ });
+ return result;
+ }
}
/**
- * Checks if `path` is a direct property of `object`.
+ * This method is like `_.find` except that it iterates over elements
+ * of a `collection` from right to left.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @param {Array|string} path The path to check.
- * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {*} Returns the found element, else `undefined`.
* @example
*
- * var object = { 'a': { 'b': { 'c': 3 } } };
- * var other = _.create({ 'a': _.create({ 'b': _.create({ 'c': 3 }) }) });
+ * _.findLast([1, 2, 3, 4], function(num) {
+ * return num % 2 == 1;
+ * });
+ * // => 3
+ */
+ function findLast(collection, callback, thisArg) {
+ var result;
+ callback = lodash.createCallback(callback, thisArg, 3);
+ forEachRight(collection, function(value, index, collection) {
+ if (callback(value, index, collection)) {
+ result = value;
+ return false;
+ }
+ });
+ return result;
+ }
+
+ /**
+ * Iterates over elements of a collection, executing the callback for each
+ * element. The callback is bound to `thisArg` and invoked with three arguments;
+ * (value, index|key, collection). Callbacks may exit iteration early by
+ * explicitly returning `false`.
*
- * _.has(object, 'a');
- * // => true
+ * Note: As with other "Collections" methods, objects with a `length` property
+ * are iterated like arrays. To avoid this behavior `_.forIn` or `_.forOwn`
+ * may be used for object iteration.
*
- * _.has(object, 'a.b.c');
- * // => true
+ * @static
+ * @memberOf _
+ * @alias each
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function} [callback=identity] The function called per iteration.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array|Object|string} Returns `collection`.
+ * @example
*
- * _.has(object, ['a', 'b', 'c']);
- * // => true
+ * _([1, 2, 3]).forEach(function(num) { console.log(num); }).join(',');
+ * // => logs each number and returns '1,2,3'
*
- * _.has(other, 'a');
- * // => false
+ * _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { console.log(num); });
+ * // => logs each number and returns the object (property order is not guaranteed across environments)
*/
- function has(object, path) {
- return hasPath(object, path, baseHas);
+ function forEach(collection, callback, thisArg) {
+ if (callback && typeof thisArg == 'undefined' && isArray(collection)) {
+ var index = -1,
+ length = collection.length;
+
+ while (++index < length) {
+ if (callback(collection[index], index, collection) === false) {
+ break;
+ }
+ }
+ } else {
+ baseEach(collection, callback, thisArg);
+ }
+ return collection;
}
/**
- * Checks if `path` is a direct or inherited property of `object`.
+ * This method is like `_.forEach` except that it iterates over elements
+ * of a `collection` from right to left.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @param {Array|string} path The path to check.
- * @returns {boolean} Returns `true` if `path` exists, else `false`.
+ * @alias eachRight
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function} [callback=identity] The function called per iteration.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array|Object|string} Returns `collection`.
* @example
*
- * var object = _.create({ 'a': _.create({ 'b': _.create({ 'c': 3 }) }) });
- *
- * _.hasIn(object, 'a');
- * // => true
- *
- * _.hasIn(object, 'a.b.c');
- * // => true
- *
- * _.hasIn(object, ['a', 'b', 'c']);
- * // => true
- *
- * _.hasIn(object, 'b');
- * // => false
+ * _([1, 2, 3]).forEachRight(function(num) { console.log(num); }).join(',');
+ * // => logs each number from right to left and returns '3,2,1'
*/
- function hasIn(object, path) {
- return hasPath(object, path, baseHasIn);
+ function forEachRight(collection, callback, thisArg) {
+ var iterable = collection,
+ length = collection ? collection.length : 0;
+
+ callback = callback && typeof thisArg == 'undefined' ? callback : baseCreateCallback(callback, thisArg, 3);
+ if (isArray(collection)) {
+ while (length--) {
+ if (callback(collection[length], length, collection) === false) {
+ break;
+ }
+ }
+ } else {
+ if (typeof length != 'number') {
+ var props = keys(collection);
+ length = props.length;
+ } else if (support.unindexedChars && isString(collection)) {
+ iterable = collection.split('');
+ }
+ baseEach(collection, function(value, key, collection) {
+ key = props ? props[--length] : --length;
+ return callback(iterable[key], key, collection);
+ });
+ }
+ return collection;
}
/**
- * Creates an object composed of the inverted keys and values of `object`.
- * If `object` contains duplicate values, subsequent values overwrite property
- * assignments of previous values.
+ * Creates an object composed of keys generated from the results of running
+ * each element of a collection through the callback. The corresponding value
+ * of each key is an array of the elements responsible for generating the key.
+ * The callback is bound to `thisArg` and invoked with three arguments;
+ * (value, index|key, collection).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to invert.
- * @returns {Object} Returns the new inverted object.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Object} Returns the composed aggregate object.
* @example
*
- * var object = { 'a': 1, 'b': 2, 'c': 1 };
+ * _.groupBy([4.2, 6.1, 6.4], function(num) { return Math.floor(num); });
+ * // => { '4': [4.2], '6': [6.1, 6.4] }
*
- * _.invert(object);
- * // => { '1': 'c', '2': 'b' }
+ * _.groupBy([4.2, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
+ * // => { '4': [4.2], '6': [6.1, 6.4] }
+ *
+ * // using "_.pluck" callback shorthand
+ * _.groupBy(['one', 'two', 'three'], 'length');
+ * // => { '3': ['one', 'two'], '5': ['three'] }
*/
- var invert = createInverter(function(result, value, key) {
- result[value] = key;
- }, constant(identity));
+ var groupBy = createAggregator(function(result, value, key) {
+ (hasOwnProperty.call(result, key) ? result[key] : result[key] = []).push(value);
+ });
/**
- * This method is like `_.invert` except that the inverted object is generated
- * from the results of running each element of `object` through `iteratee`.
- * The corresponding inverted value of each inverted key is an array of keys
- * responsible for generating the inverted value. The iteratee is invoked
- * with one argument: (value).
+ * Creates an object composed of keys generated from the results of running
+ * each element of the collection through the given callback. The corresponding
+ * value of each key is the last element responsible for generating the key.
+ * The callback is bound to `thisArg` and invoked with three arguments;
+ * (value, index|key, collection).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to invert.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Object} Returns the new inverted object.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Object} Returns the composed aggregate object.
* @example
*
- * var object = { 'a': 1, 'b': 2, 'c': 1 };
+ * var keys = [
+ * { 'dir': 'left', 'code': 97 },
+ * { 'dir': 'right', 'code': 100 }
+ * ];
+ *
+ * _.indexBy(keys, 'dir');
+ * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
*
- * _.invertBy(object);
- * // => { '1': ['a', 'c'], '2': ['b'] }
+ * _.indexBy(keys, function(key) { return String.fromCharCode(key.code); });
+ * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
*
- * _.invertBy(object, function(value) {
- * return 'group' + value;
- * });
- * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
+ * _.indexBy(characters, function(key) { this.fromCharCode(key.code); }, String);
+ * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
*/
- var invertBy = createInverter(function(result, value, key) {
- if (hasOwnProperty.call(result, value)) {
- result[value].push(key);
- } else {
- result[value] = [key];
- }
- }, getIteratee);
+ var indexBy = createAggregator(function(result, value, key) {
+ result[key] = value;
+ });
/**
- * Invokes the method at `path` of `object`.
+ * Invokes the method named by `methodName` on each element in the `collection`
+ * returning an array of the results of each invoked method. Additional arguments
+ * will be provided to each invoked method. If `methodName` is a function it
+ * will be invoked for, and `this` bound to, each element in the `collection`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the method to invoke.
- * @param {...*} [args] The arguments to invoke the method with.
- * @returns {*} Returns the result of the invoked method.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|string} methodName The name of the method to invoke or
+ * the function invoked per iteration.
+ * @param {...*} [arg] Arguments to invoke the method with.
+ * @returns {Array} Returns a new array of the results of each invoked method.
* @example
*
- * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
+ * _.invoke([[5, 1, 7], [3, 2, 1]], 'sort');
+ * // => [[1, 5, 7], [1, 2, 3]]
*
- * _.invoke(object, 'a[0].b.c.slice', 1, 3);
- * // => [2, 3]
+ * _.invoke([123, 456], String.prototype.split, '');
+ * // => [['1', '2', '3'], ['4', '5', '6']]
*/
- var invoke = rest(baseInvoke);
+ function invoke(collection, methodName) {
+ var args = slice(arguments, 2),
+ index = -1,
+ isFunc = typeof methodName == 'function',
+ length = collection ? collection.length : 0,
+ result = Array(typeof length == 'number' ? length : 0);
+
+ forEach(collection, function(value) {
+ result[++index] = (isFunc ? methodName : value[methodName]).apply(value, args);
+ });
+ return result;
+ }
/**
- * Creates an array of the own enumerable property names of `object`.
+ * Creates an array of values by running each element in the collection
+ * through the callback. The callback is bound to `thisArg` and invoked with
+ * three arguments; (value, index|key, collection).
*
- * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
- * for more details.
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
+ * @alias collect
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array} Returns a new array of the results of each `callback` execution.
* @example
*
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
+ * _.map([1, 2, 3], function(num) { return num * 3; });
+ * // => [3, 6, 9]
*
- * Foo.prototype.c = 3;
+ * _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { return num * 3; });
+ * // => [3, 6, 9] (property order is not guaranteed across environments)
*
- * _.keys(new Foo);
- * // => ['a', 'b'] (iteration order is not guaranteed)
+ * var characters = [
+ * { 'name': 'barney', 'age': 36 },
+ * { 'name': 'fred', 'age': 40 }
+ * ];
*
- * _.keys('hi');
- * // => ['0', '1']
+ * // using "_.pluck" callback shorthand
+ * _.map(characters, 'name');
+ * // => ['barney', 'fred']
*/
- function keys(object) {
- var isProto = isPrototype(object);
- if (!(isProto || isArrayLike(object))) {
- return baseKeys(object);
- }
- var indexes = indexKeys(object),
- skipIndexes = !!indexes,
- result = indexes || [],
- length = result.length;
+ function map(collection, callback, thisArg) {
+ var index = -1,
+ length = collection ? collection.length : 0,
+ result = Array(typeof length == 'number' ? length : 0);
- for (var key in object) {
- if (baseHas(object, key) &&
- !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
- !(isProto && key == 'constructor')) {
- result.push(key);
+ callback = lodash.createCallback(callback, thisArg, 3);
+ if (isArray(collection)) {
+ while (++index < length) {
+ result[index] = callback(collection[index], index, collection);
}
+ } else {
+ baseEach(collection, function(value, key, collection) {
+ result[++index] = callback(value, key, collection);
+ });
}
return result;
}
/**
- * Creates an array of the own and inherited enumerable property names of `object`.
+ * Retrieves the maximum value of a collection. If the collection is empty or
+ * falsey `-Infinity` is returned. If a callback is provided it will be executed
+ * for each value in the collection to generate the criterion by which the value
+ * is ranked. The callback is bound to `thisArg` and invoked with three
+ * arguments; (value, index, collection).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
*
- * **Note:** Non-object values are coerced to objects.
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {*} Returns the maximum value.
* @example
*
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
+ * _.max([4, 2, 8, 6]);
+ * // => 8
+ *
+ * var characters = [
+ * { 'name': 'barney', 'age': 36 },
+ * { 'name': 'fred', 'age': 40 }
+ * ];
*
- * Foo.prototype.c = 3;
+ * _.max(characters, function(chr) { return chr.age; });
+ * // => { 'name': 'fred', 'age': 40 };
*
- * _.keysIn(new Foo);
- * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+ * // using "_.pluck" callback shorthand
+ * _.max(characters, 'age');
+ * // => { 'name': 'fred', 'age': 40 };
*/
- function keysIn(object) {
- var index = -1,
- isProto = isPrototype(object),
- props = baseKeysIn(object),
- propsLength = props.length,
- indexes = indexKeys(object),
- skipIndexes = !!indexes,
- result = indexes || [],
- length = result.length;
-
- while (++index < propsLength) {
- var key = props[index];
- if (!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
- !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
- result.push(key);
+ function max(collection, callback, thisArg) {
+ var computed = -Infinity,
+ result = computed;
+
+ // allows working with functions like `_.map` without using
+ // their `index` argument as a callback
+ if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
+ callback = null;
+ }
+ if (callback == null && isArray(collection)) {
+ var index = -1,
+ length = collection.length;
+
+ while (++index < length) {
+ var value = collection[index];
+ if (value > result) {
+ result = value;
+ }
}
+ } else {
+ callback = (callback == null && isString(collection))
+ ? charAtCallback
+ : lodash.createCallback(callback, thisArg, 3);
+
+ baseEach(collection, function(value, index, collection) {
+ var current = callback(value, index, collection);
+ if (current > computed) {
+ computed = current;
+ result = value;
+ }
+ });
}
return result;
}
/**
- * The opposite of `_.mapValues`; this method creates an object with the
- * same values as `object` and keys generated by running each own enumerable
- * property of `object` through `iteratee`. The iteratee is invoked with
- * three arguments: (value, key, object).
+ * Retrieves the minimum value of a collection. If the collection is empty or
+ * falsey `Infinity` is returned. If a callback is provided it will be executed
+ * for each value in the collection to generate the criterion by which the value
+ * is ranked. The callback is bound to `thisArg` and invoked with three
+ * arguments; (value, index, collection).
*
- * @static
- * @memberOf _
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns the new mapped object.
- * @example
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
*
- * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
- * return key + value;
- * });
- * // => { 'a1': 1, 'b2': 2 }
- */
- function mapKeys(object, iteratee) {
- var result = {};
- iteratee = getIteratee(iteratee, 3);
-
- baseForOwn(object, function(value, key, object) {
- result[iteratee(value, key, object)] = value;
- });
- return result;
- }
-
- /**
- * Creates an object with the same keys as `object` and values generated by
- * running each own enumerable property of `object` through `iteratee`. The
- * iteratee is invoked with three arguments: (value, key, object).
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function|Object|string} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns the new mapped object.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {*} Returns the minimum value.
* @example
*
- * var users = {
- * 'fred': { 'user': 'fred', 'age': 40 },
- * 'pebbles': { 'user': 'pebbles', 'age': 1 }
- * };
+ * _.min([4, 2, 8, 6]);
+ * // => 2
+ *
+ * var characters = [
+ * { 'name': 'barney', 'age': 36 },
+ * { 'name': 'fred', 'age': 40 }
+ * ];
*
- * _.mapValues(users, function(o) { return o.age; });
- * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
+ * _.min(characters, function(chr) { return chr.age; });
+ * // => { 'name': 'barney', 'age': 36 };
*
- * // The `_.property` iteratee shorthand.
- * _.mapValues(users, 'age');
- * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
+ * // using "_.pluck" callback shorthand
+ * _.min(characters, 'age');
+ * // => { 'name': 'barney', 'age': 36 };
*/
- function mapValues(object, iteratee) {
- var result = {};
- iteratee = getIteratee(iteratee, 3);
+ function min(collection, callback, thisArg) {
+ var computed = Infinity,
+ result = computed;
- baseForOwn(object, function(value, key, object) {
- result[key] = iteratee(value, key, object);
- });
+ // allows working with functions like `_.map` without using
+ // their `index` argument as a callback
+ if (typeof callback != 'function' && thisArg && thisArg[callback] === collection) {
+ callback = null;
+ }
+ if (callback == null && isArray(collection)) {
+ var index = -1,
+ length = collection.length;
+
+ while (++index < length) {
+ var value = collection[index];
+ if (value < result) {
+ result = value;
+ }
+ }
+ } else {
+ callback = (callback == null && isString(collection))
+ ? charAtCallback
+ : lodash.createCallback(callback, thisArg, 3);
+
+ baseEach(collection, function(value, index, collection) {
+ var current = callback(value, index, collection);
+ if (current < computed) {
+ computed = current;
+ result = value;
+ }
+ });
+ }
return result;
}
/**
- * This method is like `_.assign` except that it recursively merges own and
- * inherited enumerable properties of source objects into the destination
- * object. Source properties that resolve to `undefined` are skipped if a
- * destination value exists. Array and plain object properties are merged
- * recursively.Other objects and value types are overridden by assignment.
- * Source objects are applied from left to right. Subsequent sources
- * overwrite property assignments of previous sources.
- *
- * **Note:** This method mutates `object`.
+ * Retrieves the value of a specified property from all elements in the collection.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} [sources] The source objects.
- * @returns {Object} Returns `object`.
+ * @type Function
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {string} property The name of the property to pluck.
+ * @returns {Array} Returns a new array of property values.
* @example
*
- * var users = {
- * 'data': [{ 'user': 'barney' }, { 'user': 'fred' }]
- * };
- *
- * var ages = {
- * 'data': [{ 'age': 36 }, { 'age': 40 }]
- * };
+ * var characters = [
+ * { 'name': 'barney', 'age': 36 },
+ * { 'name': 'fred', 'age': 40 }
+ * ];
*
- * _.merge(users, ages);
- * // => { 'data': [{ 'user': 'barney', 'age': 36 }, { 'user': 'fred', 'age': 40 }] }
+ * _.pluck(characters, 'name');
+ * // => ['barney', 'fred']
*/
- var merge = createAssigner(function(object, source, srcIndex) {
- baseMerge(object, source, srcIndex);
- });
+ var pluck = map;
/**
- * This method is like `_.merge` except that it accepts `customizer` which
- * is invoked to produce the merged values of the destination and source
- * properties. If `customizer` returns `undefined` merging is handled by the
- * method instead. The `customizer` is invoked with seven arguments:
- * (objValue, srcValue, key, object, source, stack).
- *
- * **Note:** This method mutates `object`.
+ * Reduces a collection to a value which is the accumulated result of running
+ * each element in the collection through the callback, where each successive
+ * callback execution consumes the return value of the previous execution. If
+ * `accumulator` is not provided the first element of the collection will be
+ * used as the initial `accumulator` value. The callback is bound to `thisArg`
+ * and invoked with four arguments; (accumulator, value, index|key, collection).
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} sources The source objects.
- * @param {Function} customizer The function to customize assigned values.
- * @returns {Object} Returns `object`.
+ * @alias foldl, inject
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function} [callback=identity] The function called per iteration.
+ * @param {*} [accumulator] Initial value of the accumulator.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {*} Returns the accumulated value.
* @example
*
- * function customizer(objValue, srcValue) {
- * if (_.isArray(objValue)) {
- * return objValue.concat(srcValue);
- * }
- * }
- *
- * var object = {
- * 'fruits': ['apple'],
- * 'vegetables': ['beet']
- * };
- *
- * var other = {
- * 'fruits': ['banana'],
- * 'vegetables': ['carrot']
- * };
+ * var sum = _.reduce([1, 2, 3], function(sum, num) {
+ * return sum + num;
+ * });
+ * // => 6
*
- * _.mergeWith(object, other, customizer);
- * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot'] }
+ * var mapped = _.reduce({ 'a': 1, 'b': 2, 'c': 3 }, function(result, num, key) {
+ * result[key] = num * 3;
+ * return result;
+ * }, {});
+ * // => { 'a': 3, 'b': 6, 'c': 9 }
*/
- var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
- baseMerge(object, source, srcIndex, customizer);
- });
+ function reduce(collection, callback, accumulator, thisArg) {
+ var noaccum = arguments.length < 3;
+ callback = lodash.createCallback(callback, thisArg, 4);
- /**
- * The opposite of `_.pick`; this method creates an object composed of the
- * own and inherited enumerable properties of `object` that are not omitted.
- *
- * @static
- * @memberOf _
- * @category Object
- * @param {Object} object The source object.
- * @param {...(string|string[])} [props] The property names to omit, specified
- * individually or in arrays.
- * @returns {Object} Returns the new object.
- * @example
- *
- * var object = { 'a': 1, 'b': '2', 'c': 3 };
- *
- * _.omit(object, ['a', 'c']);
- * // => { 'b': '2' }
- */
- var omit = rest(function(object, props) {
- if (object == null) {
- return {};
+ if (isArray(collection)) {
+ var index = -1,
+ length = collection.length;
+
+ if (noaccum) {
+ accumulator = collection[++index];
+ }
+ while (++index < length) {
+ accumulator = callback(accumulator, collection[index], index, collection);
+ }
+ } else {
+ baseEach(collection, function(value, index, collection) {
+ accumulator = noaccum
+ ? (noaccum = false, value)
+ : callback(accumulator, value, index, collection)
+ });
}
- props = arrayMap(baseFlatten(props, 1), String);
- return basePick(object, baseDifference(keysIn(object), props));
- });
+ return accumulator;
+ }
/**
- * The opposite of `_.pickBy`; this method creates an object composed of
- * the own and inherited enumerable properties of `object` that `predicate`
- * doesn't return truthy for. The predicate is invoked with two arguments:
- * (value, key).
+ * This method is like `_.reduce` except that it iterates over elements
+ * of a `collection` from right to left.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The source object.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per property.
- * @returns {Object} Returns the new object.
+ * @alias foldr
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function} [callback=identity] The function called per iteration.
+ * @param {*} [accumulator] Initial value of the accumulator.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {*} Returns the accumulated value.
* @example
*
- * var object = { 'a': 1, 'b': '2', 'c': 3 };
- *
- * _.omitBy(object, _.isNumber);
- * // => { 'b': '2' }
+ * var list = [[0, 1], [2, 3], [4, 5]];
+ * var flat = _.reduceRight(list, function(a, b) { return a.concat(b); }, []);
+ * // => [4, 5, 2, 3, 0, 1]
*/
- function omitBy(object, predicate) {
- predicate = getIteratee(predicate);
- return basePickBy(object, function(value, key) {
- return !predicate(value, key);
+ function reduceRight(collection, callback, accumulator, thisArg) {
+ var noaccum = arguments.length < 3;
+ callback = lodash.createCallback(callback, thisArg, 4);
+ forEachRight(collection, function(value, index, collection) {
+ accumulator = noaccum
+ ? (noaccum = false, value)
+ : callback(accumulator, value, index, collection);
});
+ return accumulator;
}
/**
- * Creates an object composed of the picked `object` properties.
- *
- * @static
- * @memberOf _
- * @category Object
- * @param {Object} object The source object.
- * @param {...(string|string[])} [props] The property names to pick, specified
- * individually or in arrays.
- * @returns {Object} Returns the new object.
- * @example
+ * The opposite of `_.filter` this method returns the elements of a
+ * collection that the callback does **not** return truey for.
*
- * var object = { 'a': 1, 'b': '2', 'c': 3 };
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
*
- * _.pick(object, ['a', 'c']);
- * // => { 'a': 1, 'c': 3 }
- */
- var pick = rest(function(object, props) {
- return object == null ? {} : basePick(object, baseFlatten(props, 1));
- });
-
- /**
- * Creates an object composed of the `object` properties `predicate` returns
- * truthy for. The predicate is invoked with two arguments: (value, key).
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The source object.
- * @param {Function|Object|string} [predicate=_.identity] The function invoked per property.
- * @returns {Object} Returns the new object.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array} Returns a new array of elements that failed the callback check.
* @example
*
- * var object = { 'a': 1, 'b': '2', 'c': 3 };
+ * var odds = _.reject([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
+ * // => [1, 3, 5]
+ *
+ * var characters = [
+ * { 'name': 'barney', 'age': 36, 'blocked': false },
+ * { 'name': 'fred', 'age': 40, 'blocked': true }
+ * ];
+ *
+ * // using "_.pluck" callback shorthand
+ * _.reject(characters, 'blocked');
+ * // => [{ 'name': 'barney', 'age': 36, 'blocked': false }]
*
- * _.pickBy(object, _.isNumber);
- * // => { 'a': 1, 'c': 3 }
+ * // using "_.where" callback shorthand
+ * _.reject(characters, { 'age': 36 });
+ * // => [{ 'name': 'fred', 'age': 40, 'blocked': true }]
*/
- function pickBy(object, predicate) {
- return object == null ? {} : basePickBy(object, getIteratee(predicate));
+ function reject(collection, callback, thisArg) {
+ callback = lodash.createCallback(callback, thisArg, 3);
+ return filter(collection, function(value, index, collection) {
+ return !callback(value, index, collection);
+ });
}
/**
- * This method is like `_.get` except that if the resolved value is a function
- * it's invoked with the `this` binding of its parent object and its result
- * is returned.
+ * Retrieves a random element or `n` random elements from a collection.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the property to resolve.
- * @param {*} [defaultValue] The value returned if the resolved value is `undefined`.
- * @returns {*} Returns the resolved value.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to sample.
+ * @param {number} [n] The number of elements to sample.
+ * @param- {Object} [guard] Allows working with functions like `_.map`
+ * without using their `index` arguments as `n`.
+ * @returns {Array} Returns the random sample(s) of `collection`.
* @example
*
- * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
- *
- * _.result(object, 'a[0].b.c1');
- * // => 3
- *
- * _.result(object, 'a[0].b.c2');
- * // => 4
- *
- * _.result(object, 'a[0].b.c3', 'default');
- * // => 'default'
+ * _.sample([1, 2, 3, 4]);
+ * // => 2
*
- * _.result(object, 'a[0].b.c3', _.constant('default'));
- * // => 'default'
+ * _.sample([1, 2, 3, 4], 2);
+ * // => [3, 1]
*/
- function result(object, path, defaultValue) {
- if (!isKey(path, object)) {
- path = baseCastPath(path);
- var result = get(object, path);
- object = parent(object, path);
- } else {
- result = object == null ? undefined : object[path];
+ function sample(collection, n, guard) {
+ if (collection && typeof collection.length != 'number') {
+ collection = values(collection);
+ } else if (support.unindexedChars && isString(collection)) {
+ collection = collection.split('');
}
- if (result === undefined) {
- result = defaultValue;
+ if (n == null || guard) {
+ return collection ? collection[baseRandom(0, collection.length - 1)] : undefined;
}
- return isFunction(result) ? result.call(object) : result;
+ var result = shuffle(collection);
+ result.length = nativeMin(nativeMax(0, n), result.length);
+ return result;
}
/**
- * Sets the value at `path` of `object`. If a portion of `path` doesn't exist
- * it's created. Arrays are created for missing index properties while objects
- * are created for all other missing properties. Use `_.setWith` to customize
- * `path` creation.
- *
- * **Note:** This method mutates `object`.
+ * Creates an array of shuffled values, using a version of the Fisher-Yates
+ * shuffle. See http://en.wikipedia.org/wiki/Fisher-Yates_shuffle.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns `object`.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to shuffle.
+ * @returns {Array} Returns a new shuffled collection.
* @example
*
- * var object = { 'a': [{ 'b': { 'c': 3 } }] };
- *
- * _.set(object, 'a[0].b.c', 4);
- * console.log(object.a[0].b.c);
- * // => 4
- *
- * _.set(object, 'x[0].y.z', 5);
- * console.log(object.x[0].y.z);
- * // => 5
+ * _.shuffle([1, 2, 3, 4, 5, 6]);
+ * // => [4, 1, 6, 3, 5, 2]
*/
- function set(object, path, value) {
- return object == null ? object : baseSet(object, path, value);
+ function shuffle(collection) {
+ var index = -1,
+ length = collection ? collection.length : 0,
+ result = Array(typeof length == 'number' ? length : 0);
+
+ forEach(collection, function(value) {
+ var rand = baseRandom(0, ++index);
+ result[index] = result[rand];
+ result[rand] = value;
+ });
+ return result;
}
/**
- * This method is like `_.set` except that it accepts `customizer` which is
- * invoked to produce the objects of `path`. If `customizer` returns `undefined`
- * path creation is handled by the method instead. The `customizer` is invoked
- * with three arguments: (nsValue, key, nsObject).
- *
- * **Note:** This method mutates `object`.
+ * Gets the size of the `collection` by returning `collection.length` for arrays
+ * and array-like objects or the number of own enumerable properties for objects.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to set.
- * @param {*} value The value to set.
- * @param {Function} [customizer] The function to customize assigned values.
- * @returns {Object} Returns `object`.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to inspect.
+ * @returns {number} Returns `collection.length` or number of own enumerable properties.
* @example
*
- * var object = {};
+ * _.size([1, 2]);
+ * // => 2
+ *
+ * _.size({ 'one': 1, 'two': 2, 'three': 3 });
+ * // => 3
*
- * _.setWith(object, '[0][1]', 'a', Object);
- * // => { '0': { '1': 'a' } }
+ * _.size('pebbles');
+ * // => 7
*/
- function setWith(object, path, value, customizer) {
- customizer = typeof customizer == 'function' ? customizer : undefined;
- return object == null ? object : baseSet(object, path, value, customizer);
+ function size(collection) {
+ var length = collection ? collection.length : 0;
+ return typeof length == 'number' ? length : keys(collection).length;
}
/**
- * Creates an array of own enumerable key-value pairs for `object` which
- * can be consumed by `_.fromPairs`.
+ * Checks if the callback returns a truey value for **any** element of a
+ * collection. The function returns as soon as it finds a passing value and
+ * does not iterate over the entire collection. The callback is bound to
+ * `thisArg` and invoked with three arguments; (value, index|key, collection).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the new array of key-value pairs.
+ * @alias any
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {boolean} Returns `true` if any element passed the callback check,
+ * else `false`.
* @example
*
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
+ * _.some([null, 0, 'yes', false], Boolean);
+ * // => true
+ *
+ * var characters = [
+ * { 'name': 'barney', 'age': 36, 'blocked': false },
+ * { 'name': 'fred', 'age': 40, 'blocked': true }
+ * ];
*
- * Foo.prototype.c = 3;
+ * // using "_.pluck" callback shorthand
+ * _.some(characters, 'blocked');
+ * // => true
*
- * _.toPairs(new Foo);
- * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
+ * // using "_.where" callback shorthand
+ * _.some(characters, { 'age': 1 });
+ * // => false
*/
- function toPairs(object) {
- return baseToPairs(object, keys(object));
+ function some(collection, callback, thisArg) {
+ var result;
+ callback = lodash.createCallback(callback, thisArg, 3);
+
+ if (isArray(collection)) {
+ var index = -1,
+ length = collection.length;
+
+ while (++index < length) {
+ if ((result = callback(collection[index], index, collection))) {
+ break;
+ }
+ }
+ } else {
+ baseEach(collection, function(value, index, collection) {
+ return !(result = callback(value, index, collection));
+ });
+ }
+ return !!result;
}
/**
- * Creates an array of own and inherited enumerable key-value pairs for
- * `object` which can be consumed by `_.fromPairs`.
- *
- * @static
- * @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the new array of key-value pairs.
- * @example
+ * Creates an array of elements, sorted in ascending order by the results of
+ * running each element in a collection through the callback. This method
+ * performs a stable sort, that is, it will preserve the original sort order
+ * of equal elements. The callback is bound to `thisArg` and invoked with
+ * three arguments; (value, index|key, collection).
*
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
*
- * Foo.prototype.c = 3;
+ * If an array of property names is provided for `callback` the collection
+ * will be sorted by each property value.
*
- * _.toPairsIn(new Foo);
- * // => [['a', 1], ['b', 2], ['c', 1]] (iteration order is not guaranteed)
- */
- function toPairsIn(object) {
- return baseToPairs(object, keysIn(object));
- }
-
- /**
- * An alternative to `_.reduce`; this method transforms `object` to a new
- * `accumulator` object which is the result of running each of its own enumerable
- * properties through `iteratee`, with each invocation potentially mutating
- * the `accumulator` object. The iteratee is invoked with four arguments:
- * (accumulator, value, key, object). Iteratee functions may exit iteration
- * early by explicitly returning `false`.
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Array|Object} object The object to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @param {*} [accumulator] The custom accumulator value.
- * @returns {*} Returns the accumulated value.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Array|Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array} Returns a new array of sorted elements.
* @example
*
- * _.transform([2, 3, 4], function(result, n) {
- * result.push(n *= n);
- * return n % 2 == 0;
- * }, []);
- * // => [4, 9]
+ * _.sortBy([1, 2, 3], function(num) { return Math.sin(num); });
+ * // => [3, 1, 2]
*
- * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
- * (result[value] || (result[value] = [])).push(key);
- * }, {});
- * // => { '1': ['a', 'c'], '2': ['b'] }
+ * _.sortBy([1, 2, 3], function(num) { return this.sin(num); }, Math);
+ * // => [3, 1, 2]
+ *
+ * var characters = [
+ * { 'name': 'barney', 'age': 36 },
+ * { 'name': 'fred', 'age': 40 },
+ * { 'name': 'barney', 'age': 26 },
+ * { 'name': 'fred', 'age': 30 }
+ * ];
+ *
+ * // using "_.pluck" callback shorthand
+ * _.map(_.sortBy(characters, 'age'), _.values);
+ * // => [['barney', 26], ['fred', 30], ['barney', 36], ['fred', 40]]
+ *
+ * // sorting by multiple properties
+ * _.map(_.sortBy(characters, ['name', 'age']), _.values);
+ * // = > [['barney', 26], ['barney', 36], ['fred', 30], ['fred', 40]]
*/
- function transform(object, iteratee, accumulator) {
- var isArr = isArray(object) || isTypedArray(object);
- iteratee = getIteratee(iteratee, 4);
+ function sortBy(collection, callback, thisArg) {
+ var index = -1,
+ isArr = isArray(callback),
+ length = collection ? collection.length : 0,
+ result = Array(typeof length == 'number' ? length : 0);
- if (accumulator == null) {
- if (isArr || isObject(object)) {
- var Ctor = object.constructor;
- if (isArr) {
- accumulator = isArray(object) ? new Ctor : [];
- } else {
- accumulator = isFunction(Ctor) ? baseCreate(getPrototypeOf(object)) : {};
- }
+ if (!isArr) {
+ callback = lodash.createCallback(callback, thisArg, 3);
+ }
+ forEach(collection, function(value, key, collection) {
+ var object = result[++index] = getObject();
+ if (isArr) {
+ object.criteria = map(callback, function(key) { return value[key]; });
} else {
- accumulator = {};
+ (object.criteria = getArray())[0] = callback(value, key, collection);
}
- }
- (isArr ? arrayEach : baseForOwn)(object, function(value, index, object) {
- return iteratee(accumulator, value, index, object);
+ object.index = index;
+ object.value = value;
});
- return accumulator;
+
+ length = result.length;
+ result.sort(compareAscending);
+ while (length--) {
+ var object = result[length];
+ result[length] = object.value;
+ if (!isArr) {
+ releaseArray(object.criteria);
+ }
+ releaseObject(object);
+ }
+ return result;
}
/**
- * Removes the property at `path` of `object`.
- *
- * **Note:** This method mutates `object`.
+ * Converts the `collection` to an array.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to unset.
- * @returns {boolean} Returns `true` if the property is deleted, else `false`.
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to convert.
+ * @returns {Array} Returns the new converted array.
* @example
*
- * var object = { 'a': [{ 'b': { 'c': 7 } }] };
- * _.unset(object, 'a[0].b.c');
- * // => true
- *
- * console.log(object);
- * // => { 'a': [{ 'b': {} }] };
- *
- * _.unset(object, 'a[0].b.c');
- * // => true
- *
- * console.log(object);
- * // => { 'a': [{ 'b': {} }] };
+ * (function() { return _.toArray(arguments).slice(1); })(1, 2, 3, 4);
+ * // => [2, 3, 4]
*/
- function unset(object, path) {
- return object == null ? true : baseUnset(object, path);
+ function toArray(collection) {
+ if (collection && typeof collection.length == 'number') {
+ return (support.unindexedChars && isString(collection))
+ ? collection.split('')
+ : slice(collection);
+ }
+ return values(collection);
}
/**
- * This method is like `_.set` except that accepts `updater` to produce the
- * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
- * is invoked with one argument: (value).
- *
- * **Note:** This method mutates `object`.
+ * Performs a deep comparison of each element in a `collection` to the given
+ * `properties` object, returning an array of all elements that have equivalent
+ * property values.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to set.
- * @param {Function} updater The function to produce the updated value.
- * @returns {Object} Returns `object`.
+ * @type Function
+ * @category Collections
+ * @param {Array|Object|string} collection The collection to iterate over.
+ * @param {Object} props The object of property values to filter by.
+ * @returns {Array} Returns a new array of elements that have the given properties.
* @example
*
- * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+ * var characters = [
+ * { 'name': 'barney', 'age': 36, 'pets': ['hoppy'] },
+ * { 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] }
+ * ];
*
- * _.update(object, 'a[0].b.c', function(n) { return n * n; });
- * console.log(object.a[0].b.c);
- * // => 9
+ * _.where(characters, { 'age': 36 });
+ * // => [{ 'name': 'barney', 'age': 36, 'pets': ['hoppy'] }]
*
- * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
- * console.log(object.x[0].y.z);
- * // => 0
+ * _.where(characters, { 'pets': ['dino'] });
+ * // => [{ 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] }]
*/
- function update(object, path, updater) {
- return object == null ? object : baseUpdate(object, path, baseCastFunction(updater));
- }
+ var where = filter;
+
+ /*--------------------------------------------------------------------------*/
/**
- * This method is like `_.update` except that it accepts `customizer` which is
- * invoked to produce the objects of `path`. If `customizer` returns `undefined`
- * path creation is handled by the method instead. The `customizer` is invoked
- * with three arguments: (nsValue, key, nsObject).
- *
- * **Note:** This method mutates `object`.
+ * Creates an array with all falsey values removed. The values `false`, `null`,
+ * `0`, `""`, `undefined`, and `NaN` are all falsey.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to set.
- * @param {Function} updater The function to produce the updated value.
- * @param {Function} [customizer] The function to customize assigned values.
- * @returns {Object} Returns `object`.
+ * @category Arrays
+ * @param {Array} array The array to compact.
+ * @returns {Array} Returns a new array of filtered values.
* @example
*
- * var object = {};
- *
- * _.updateWith(object, '[0][1]', _.constant('a'), Object);
- * // => { '0': { '1': 'a' } }
+ * _.compact([0, 1, false, 2, '', 3]);
+ * // => [1, 2, 3]
*/
- function updateWith(object, path, updater, customizer) {
- customizer = typeof customizer == 'function' ? customizer : undefined;
- return object == null ? object : baseUpdate(object, path, baseCastFunction(updater), customizer);
+ function compact(array) {
+ var index = -1,
+ length = array ? array.length : 0,
+ result = [];
+
+ while (++index < length) {
+ var value = array[index];
+ if (value) {
+ result.push(value);
+ }
+ }
+ return result;
}
/**
- * Creates an array of the own enumerable property values of `object`.
- *
- * **Note:** Non-object values are coerced to objects.
+ * Creates an array excluding all values of the provided arrays using strict
+ * equality for comparisons, i.e. `===`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property values.
+ * @category Arrays
+ * @param {Array} array The array to process.
+ * @param {...Array} [values] The arrays of values to exclude.
+ * @returns {Array} Returns a new array of filtered values.
* @example
*
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.values(new Foo);
- * // => [1, 2] (iteration order is not guaranteed)
- *
- * _.values('hi');
- * // => ['h', 'i']
+ * _.difference([1, 2, 3, 4, 5], [5, 2, 10]);
+ * // => [1, 3, 4]
*/
- function values(object) {
- return object ? baseValues(object, keys(object)) : [];
+ function difference(array) {
+ return baseDifference(array, baseFlatten(arguments, true, true, 1));
}
/**
- * Creates an array of the own and inherited enumerable property values of `object`.
+ * This method is like `_.find` except that it returns the index of the first
+ * element that passes the callback check, instead of the element itself.
*
- * **Note:** Non-object values are coerced to objects.
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property values.
+ * @category Arrays
+ * @param {Array} array The array to search.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {number} Returns the index of the found element, else `-1`.
* @example
*
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
+ * var characters = [
+ * { 'name': 'barney', 'age': 36, 'blocked': false },
+ * { 'name': 'fred', 'age': 40, 'blocked': true },
+ * { 'name': 'pebbles', 'age': 1, 'blocked': false }
+ * ];
+ *
+ * _.findIndex(characters, function(chr) {
+ * return chr.age < 20;
+ * });
+ * // => 2
*
- * Foo.prototype.c = 3;
+ * // using "_.where" callback shorthand
+ * _.findIndex(characters, { 'age': 36 });
+ * // => 0
*
- * _.valuesIn(new Foo);
- * // => [1, 2, 3] (iteration order is not guaranteed)
+ * // using "_.pluck" callback shorthand
+ * _.findIndex(characters, 'blocked');
+ * // => 1
*/
- function valuesIn(object) {
- return object == null ? [] : baseValues(object, keysIn(object));
- }
+ function findIndex(array, callback, thisArg) {
+ var index = -1,
+ length = array ? array.length : 0;
- /*------------------------------------------------------------------------*/
+ callback = lodash.createCallback(callback, thisArg, 3);
+ while (++index < length) {
+ if (callback(array[index], index, array)) {
+ return index;
+ }
+ }
+ return -1;
+ }
/**
- * Clamps `number` within the inclusive `lower` and `upper` bounds.
+ * This method is like `_.findIndex` except that it iterates over elements
+ * of a `collection` from right to left.
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Number
- * @param {number} number The number to clamp.
- * @param {number} [lower] The lower bound.
- * @param {number} upper The upper bound.
- * @returns {number} Returns the clamped number.
+ * @category Arrays
+ * @param {Array} array The array to search.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {number} Returns the index of the found element, else `-1`.
* @example
*
- * _.clamp(-10, -5, 5);
- * // => -5
+ * var characters = [
+ * { 'name': 'barney', 'age': 36, 'blocked': true },
+ * { 'name': 'fred', 'age': 40, 'blocked': false },
+ * { 'name': 'pebbles', 'age': 1, 'blocked': true }
+ * ];
+ *
+ * _.findLastIndex(characters, function(chr) {
+ * return chr.age > 30;
+ * });
+ * // => 1
+ *
+ * // using "_.where" callback shorthand
+ * _.findLastIndex(characters, { 'age': 36 });
+ * // => 0
*
- * _.clamp(10, -5, 5);
- * // => 5
+ * // using "_.pluck" callback shorthand
+ * _.findLastIndex(characters, 'blocked');
+ * // => 2
*/
- function clamp(number, lower, upper) {
- if (upper === undefined) {
- upper = lower;
- lower = undefined;
- }
- if (upper !== undefined) {
- upper = toNumber(upper);
- upper = upper === upper ? upper : 0;
- }
- if (lower !== undefined) {
- lower = toNumber(lower);
- lower = lower === lower ? lower : 0;
+ function findLastIndex(array, callback, thisArg) {
+ var length = array ? array.length : 0;
+ callback = lodash.createCallback(callback, thisArg, 3);
+ while (length--) {
+ if (callback(array[length], length, array)) {
+ return length;
+ }
}
- return baseClamp(toNumber(number), lower, upper);
+ return -1;
}
/**
- * Checks if `n` is between `start` and up to but not including, `end`. If
- * `end` is not specified it's set to `start` with `start` then set to `0`.
- * If `start` is greater than `end` the params are swapped to support
- * negative ranges.
+ * Gets the first element or first `n` elements of an array. If a callback
+ * is provided elements at the beginning of the array are returned as long
+ * as the callback returns truey. The callback is bound to `thisArg` and
+ * invoked with three arguments; (value, index, array).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Number
- * @param {number} number The number to check.
- * @param {number} [start=0] The start of the range.
- * @param {number} end The end of the range.
- * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
+ * @alias head, take
+ * @category Arrays
+ * @param {Array} array The array to query.
+ * @param {Function|Object|number|string} [callback] The function called
+ * per element or the number of elements to return. If a property name or
+ * object is provided it will be used to create a "_.pluck" or "_.where"
+ * style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {*} Returns the first element(s) of `array`.
* @example
*
- * _.inRange(3, 2, 4);
- * // => true
- *
- * _.inRange(4, 8);
- * // => true
+ * _.first([1, 2, 3]);
+ * // => 1
*
- * _.inRange(4, 2);
- * // => false
+ * _.first([1, 2, 3], 2);
+ * // => [1, 2]
*
- * _.inRange(2, 2);
- * // => false
+ * _.first([1, 2, 3], function(num) {
+ * return num < 3;
+ * });
+ * // => [1, 2]
*
- * _.inRange(1.2, 2);
- * // => true
+ * var characters = [
+ * { 'name': 'barney', 'blocked': true, 'employer': 'slate' },
+ * { 'name': 'fred', 'blocked': false, 'employer': 'slate' },
+ * { 'name': 'pebbles', 'blocked': true, 'employer': 'na' }
+ * ];
*
- * _.inRange(5.2, 4);
- * // => false
+ * // using "_.pluck" callback shorthand
+ * _.first(characters, 'blocked');
+ * // => [{ 'name': 'barney', 'blocked': true, 'employer': 'slate' }]
*
- * _.inRange(-3, -2, -6);
- * // => true
+ * // using "_.where" callback shorthand
+ * _.pluck(_.first(characters, { 'employer': 'slate' }), 'name');
+ * // => ['barney', 'fred']
*/
- function inRange(number, start, end) {
- start = toNumber(start) || 0;
- if (end === undefined) {
- end = start;
- start = 0;
+ function first(array, callback, thisArg) {
+ var n = 0,
+ length = array ? array.length : 0;
+
+ if (typeof callback != 'number' && callback != null) {
+ var index = -1;
+ callback = lodash.createCallback(callback, thisArg, 3);
+ while (++index < length && callback(array[index], index, array)) {
+ n++;
+ }
} else {
- end = toNumber(end) || 0;
+ n = callback;
+ if (n == null || thisArg) {
+ return array ? array[0] : undefined;
+ }
}
- number = toNumber(number);
- return baseInRange(number, start, end);
+ return slice(array, 0, nativeMin(nativeMax(0, n), length));
}
/**
- * Produces a random number between the inclusive `lower` and `upper` bounds.
- * If only one argument is provided a number between `0` and the given number
- * is returned. If `floating` is `true`, or either `lower` or `upper` are floats,
- * a floating-point number is returned instead of an integer.
+ * Flattens a nested array (the nesting can be to any depth). If `isShallow`
+ * is truey, the array will only be flattened a single level. If a callback
+ * is provided each element of the array is passed through the callback before
+ * flattening. The callback is bound to `thisArg` and invoked with three
+ * arguments; (value, index, array).
*
- * **Note:** JavaScript follows the IEEE-754 standard for resolving
- * floating-point values which can produce unexpected results.
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category Number
- * @param {number} [lower=0] The lower bound.
- * @param {number} [upper=1] The upper bound.
- * @param {boolean} [floating] Specify returning a floating-point number.
- * @returns {number} Returns the random number.
+ * @category Arrays
+ * @param {Array} array The array to flatten.
+ * @param {boolean} [isShallow=false] A flag to restrict flattening to a single level.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array} Returns a new flattened array.
* @example
*
- * _.random(0, 5);
- * // => an integer between 0 and 5
+ * _.flatten([1, [2], [3, [[4]]]]);
+ * // => [1, 2, 3, 4];
*
- * _.random(5);
- * // => also an integer between 0 and 5
+ * _.flatten([1, [2], [3, [[4]]]], true);
+ * // => [1, 2, 3, [[4]]];
*
- * _.random(5, true);
- * // => a floating-point number between 0 and 5
+ * var characters = [
+ * { 'name': 'barney', 'age': 30, 'pets': ['hoppy'] },
+ * { 'name': 'fred', 'age': 40, 'pets': ['baby puss', 'dino'] }
+ * ];
*
- * _.random(1.2, 5.2);
- * // => a floating-point number between 1.2 and 5.2
+ * // using "_.pluck" callback shorthand
+ * _.flatten(characters, 'pets');
+ * // => ['hoppy', 'baby puss', 'dino']
*/
- function random(lower, upper, floating) {
- if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
- upper = floating = undefined;
- }
- if (floating === undefined) {
- if (typeof upper == 'boolean') {
- floating = upper;
- upper = undefined;
- }
- else if (typeof lower == 'boolean') {
- floating = lower;
- lower = undefined;
- }
- }
- if (lower === undefined && upper === undefined) {
- lower = 0;
- upper = 1;
- }
- else {
- lower = toNumber(lower) || 0;
- if (upper === undefined) {
- upper = lower;
- lower = 0;
- } else {
- upper = toNumber(upper) || 0;
- }
- }
- if (lower > upper) {
- var temp = lower;
- lower = upper;
- upper = temp;
+ function flatten(array, isShallow, callback, thisArg) {
+ // juggle arguments
+ if (typeof isShallow != 'boolean' && isShallow != null) {
+ thisArg = callback;
+ callback = (typeof isShallow != 'function' && thisArg && thisArg[isShallow] === array) ? null : isShallow;
+ isShallow = false;
}
- if (floating || lower % 1 || upper % 1) {
- var rand = nativeRandom();
- return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
+ if (callback != null) {
+ array = map(array, callback, thisArg);
}
- return baseRandom(lower, upper);
+ return baseFlatten(array, isShallow);
}
- /*------------------------------------------------------------------------*/
-
/**
- * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
+ * Gets the index at which the first occurrence of `value` is found using
+ * strict equality for comparisons, i.e. `===`. If the array is already sorted
+ * providing `true` for `fromIndex` will run a faster binary search.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the camel cased string.
+ * @category Arrays
+ * @param {Array} array The array to search.
+ * @param {*} value The value to search for.
+ * @param {boolean|number} [fromIndex=0] The index to search from or `true`
+ * to perform a binary search on a sorted array.
+ * @returns {number} Returns the index of the matched value or `-1`.
* @example
*
- * _.camelCase('Foo Bar');
- * // => 'fooBar'
+ * _.indexOf([1, 2, 3, 1, 2, 3], 2);
+ * // => 1
*
- * _.camelCase('--foo-bar');
- * // => 'fooBar'
+ * _.indexOf([1, 2, 3, 1, 2, 3], 2, 3);
+ * // => 4
*
- * _.camelCase('__foo_bar__');
- * // => 'fooBar'
+ * _.indexOf([1, 1, 2, 2, 3, 3], 2, true);
+ * // => 2
*/
- var camelCase = createCompounder(function(result, word, index) {
- word = word.toLowerCase();
- return result + (index ? capitalize(word) : word);
- });
+ function indexOf(array, value, fromIndex) {
+ if (typeof fromIndex == 'number') {
+ var length = array ? array.length : 0;
+ fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex || 0);
+ } else if (fromIndex) {
+ var index = sortedIndex(array, value);
+ return array[index] === value ? index : -1;
+ }
+ return baseIndexOf(array, value, fromIndex);
+ }
/**
- * Converts the first character of `string` to upper case and the remaining
- * to lower case.
+ * Gets all but the last element or last `n` elements of an array. If a
+ * callback is provided elements at the end of the array are excluded from
+ * the result as long as the callback returns truey. The callback is bound
+ * to `thisArg` and invoked with three arguments; (value, index, array).
*
- * @static
- * @memberOf _
- * @category String
- * @param {string} [string=''] The string to capitalize.
- * @returns {string} Returns the capitalized string.
- * @example
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
*
- * _.capitalize('FRED');
- * // => 'Fred'
- */
- function capitalize(string) {
- return upperFirst(toString(string).toLowerCase());
- }
-
- /**
- * Deburrs `string` by converting [latin-1 supplementary letters](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
- * to basic latin letters and removing [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to deburr.
- * @returns {string} Returns the deburred string.
+ * @category Arrays
+ * @param {Array} array The array to query.
+ * @param {Function|Object|number|string} [callback=1] The function called
+ * per element or the number of elements to exclude. If a property name or
+ * object is provided it will be used to create a "_.pluck" or "_.where"
+ * style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array} Returns a slice of `array`.
* @example
*
- * _.deburr('déjà vu');
- * // => 'deja vu'
- */
- function deburr(string) {
- string = toString(string);
- return string && string.replace(reLatin1, deburrLetter).replace(reComboMark, '');
- }
-
- /**
- * Checks if `string` ends with the given target string.
+ * _.initial([1, 2, 3]);
+ * // => [1, 2]
*
- * @static
- * @memberOf _
- * @category String
- * @param {string} [string=''] The string to search.
- * @param {string} [target] The string to search for.
- * @param {number} [position=string.length] The position to search from.
- * @returns {boolean} Returns `true` if `string` ends with `target`, else `false`.
- * @example
+ * _.initial([1, 2, 3], 2);
+ * // => [1]
*
- * _.endsWith('abc', 'c');
- * // => true
+ * _.initial([1, 2, 3], function(num) {
+ * return num > 1;
+ * });
+ * // => [1]
*
- * _.endsWith('abc', 'b');
- * // => false
+ * var characters = [
+ * { 'name': 'barney', 'blocked': false, 'employer': 'slate' },
+ * { 'name': 'fred', 'blocked': true, 'employer': 'slate' },
+ * { 'name': 'pebbles', 'blocked': true, 'employer': 'na' }
+ * ];
*
- * _.endsWith('abc', 'b', 2);
- * // => true
+ * // using "_.pluck" callback shorthand
+ * _.initial(characters, 'blocked');
+ * // => [{ 'name': 'barney', 'blocked': false, 'employer': 'slate' }]
+ *
+ * // using "_.where" callback shorthand
+ * _.pluck(_.initial(characters, { 'employer': 'na' }), 'name');
+ * // => ['barney', 'fred']
*/
- function endsWith(string, target, position) {
- string = toString(string);
- target = typeof target == 'string' ? target : (target + '');
-
- var length = string.length;
- position = position === undefined
- ? length
- : baseClamp(toInteger(position), 0, length);
+ function initial(array, callback, thisArg) {
+ var n = 0,
+ length = array ? array.length : 0;
- position -= target.length;
- return position >= 0 && string.indexOf(target, position) == position;
+ if (typeof callback != 'number' && callback != null) {
+ var index = length;
+ callback = lodash.createCallback(callback, thisArg, 3);
+ while (index-- && callback(array[index], index, array)) {
+ n++;
+ }
+ } else {
+ n = (callback == null || thisArg) ? 1 : callback || n;
+ }
+ return slice(array, 0, nativeMin(nativeMax(0, length - n), length));
}
/**
- * Converts the characters "&", "<", ">", '"', "'", and "\`" in `string` to
- * their corresponding HTML entities.
- *
- * **Note:** No other characters are escaped. To escape additional
- * characters use a third-party library like [_he_](https://mths.be/he).
- *
- * Though the ">" character is escaped for symmetry, characters like
- * ">" and "/" don't need escaping in HTML and have no special meaning
- * unless they're part of a tag or unquoted attribute value.
- * See [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
- * (under "semi-related fun fact") for more details.
- *
- * Backticks are escaped because in IE < 9, they can break out of
- * attribute values or HTML comments. See [#59](https://html5sec.org/#59),
- * [#102](https://html5sec.org/#102), [#108](https://html5sec.org/#108), and
- * [#133](https://html5sec.org/#133) of the [HTML5 Security Cheatsheet](https://html5sec.org/)
- * for more details.
- *
- * When working with HTML you should always [quote attribute values](http://wonko.com/post/html-escaping)
- * to reduce XSS vectors.
+ * Creates an array of unique values present in all provided arrays using
+ * strict equality for comparisons, i.e. `===`.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to escape.
- * @returns {string} Returns the escaped string.
+ * @category Arrays
+ * @param {...Array} [array] The arrays to inspect.
+ * @returns {Array} Returns an array of shared values.
* @example
*
- * _.escape('fred, barney, & pebbles');
- * // => 'fred, barney, & pebbles'
+ * _.intersection([1, 2, 3], [5, 2, 1, 4], [2, 1]);
+ * // => [1, 2]
*/
- function escape(string) {
- string = toString(string);
- return (string && reHasUnescapedHtml.test(string))
- ? string.replace(reUnescapedHtml, escapeHtmlChar)
- : string;
+ function intersection() {
+ var args = [],
+ argsIndex = -1,
+ argsLength = arguments.length,
+ caches = getArray(),
+ indexOf = getIndexOf(),
+ trustIndexOf = indexOf === baseIndexOf,
+ seen = getArray();
+
+ while (++argsIndex < argsLength) {
+ var value = arguments[argsIndex];
+ if (isArray(value) || isArguments(value)) {
+ args.push(value);
+ caches.push(trustIndexOf && value.length >= largeArraySize &&
+ createCache(argsIndex ? args[argsIndex] : seen));
+ }
+ }
+ var array = args[0],
+ index = -1,
+ length = array ? array.length : 0,
+ result = [];
+
+ outer:
+ while (++index < length) {
+ var cache = caches[0];
+ value = array[index];
+
+ if ((cache ? cacheIndexOf(cache, value) : indexOf(seen, value)) < 0) {
+ argsIndex = argsLength;
+ (cache || seen).push(value);
+ while (--argsIndex) {
+ cache = caches[argsIndex];
+ if ((cache ? cacheIndexOf(cache, value) : indexOf(args[argsIndex], value)) < 0) {
+ continue outer;
+ }
+ }
+ result.push(value);
+ }
+ }
+ while (argsLength--) {
+ cache = caches[argsLength];
+ if (cache) {
+ releaseObject(cache);
+ }
+ }
+ releaseArray(caches);
+ releaseArray(seen);
+ return result;
}
/**
- * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
- * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
+ * Gets the last element or last `n` elements of an array. If a callback is
+ * provided elements at the end of the array are returned as long as the
+ * callback returns truey. The callback is bound to `thisArg` and invoked
+ * with three arguments; (value, index, array).
*
- * @static
- * @memberOf _
- * @category String
- * @param {string} [string=''] The string to escape.
- * @returns {string} Returns the escaped string.
- * @example
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
*
- * _.escapeRegExp('[lodash](https://lodash.com/)');
- * // => '\[lodash\]\(https://lodash\.com/\)'
- */
- function escapeRegExp(string) {
- string = toString(string);
- return (string && reHasRegExpChar.test(string))
- ? string.replace(reRegExpChar, '\\$&')
- : string;
- }
-
- /**
- * Converts `string` to [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the kebab cased string.
+ * @category Arrays
+ * @param {Array} array The array to query.
+ * @param {Function|Object|number|string} [callback] The function called
+ * per element or the number of elements to return. If a property name or
+ * object is provided it will be used to create a "_.pluck" or "_.where"
+ * style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {*} Returns the last element(s) of `array`.
* @example
*
- * _.kebabCase('Foo Bar');
- * // => 'foo-bar'
+ * _.last([1, 2, 3]);
+ * // => 3
+ *
+ * _.last([1, 2, 3], 2);
+ * // => [2, 3]
+ *
+ * _.last([1, 2, 3], function(num) {
+ * return num > 1;
+ * });
+ * // => [2, 3]
+ *
+ * var characters = [
+ * { 'name': 'barney', 'blocked': false, 'employer': 'slate' },
+ * { 'name': 'fred', 'blocked': true, 'employer': 'slate' },
+ * { 'name': 'pebbles', 'blocked': true, 'employer': 'na' }
+ * ];
*
- * _.kebabCase('fooBar');
- * // => 'foo-bar'
+ * // using "_.pluck" callback shorthand
+ * _.pluck(_.last(characters, 'blocked'), 'name');
+ * // => ['fred', 'pebbles']
*
- * _.kebabCase('__foo_bar__');
- * // => 'foo-bar'
+ * // using "_.where" callback shorthand
+ * _.last(characters, { 'employer': 'na' });
+ * // => [{ 'name': 'pebbles', 'blocked': true, 'employer': 'na' }]
*/
- var kebabCase = createCompounder(function(result, word, index) {
- return result + (index ? '-' : '') + word.toLowerCase();
- });
+ function last(array, callback, thisArg) {
+ var n = 0,
+ length = array ? array.length : 0;
+
+ if (typeof callback != 'number' && callback != null) {
+ var index = length;
+ callback = lodash.createCallback(callback, thisArg, 3);
+ while (index-- && callback(array[index], index, array)) {
+ n++;
+ }
+ } else {
+ n = callback;
+ if (n == null || thisArg) {
+ return array ? array[length - 1] : undefined;
+ }
+ }
+ return slice(array, nativeMax(0, length - n));
+ }
/**
- * Converts `string`, as space separated words, to lower case.
+ * Gets the index at which the last occurrence of `value` is found using strict
+ * equality for comparisons, i.e. `===`. If `fromIndex` is negative, it is used
+ * as the offset from the end of the collection.
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the lower cased string.
+ * @category Arrays
+ * @param {Array} array The array to search.
+ * @param {*} value The value to search for.
+ * @param {number} [fromIndex=array.length-1] The index to search from.
+ * @returns {number} Returns the index of the matched value or `-1`.
* @example
*
- * _.lowerCase('--Foo-Bar');
- * // => 'foo bar'
- *
- * _.lowerCase('fooBar');
- * // => 'foo bar'
+ * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2);
+ * // => 4
*
- * _.lowerCase('__FOO_BAR__');
- * // => 'foo bar'
+ * _.lastIndexOf([1, 2, 3, 1, 2, 3], 2, 3);
+ * // => 1
*/
- var lowerCase = createCompounder(function(result, word, index) {
- return result + (index ? ' ' : '') + word.toLowerCase();
- });
+ function lastIndexOf(array, value, fromIndex) {
+ var index = array ? array.length : 0;
+ if (typeof fromIndex == 'number') {
+ index = (fromIndex < 0 ? nativeMax(0, index + fromIndex) : nativeMin(fromIndex, index - 1)) + 1;
+ }
+ while (index--) {
+ if (array[index] === value) {
+ return index;
+ }
+ }
+ return -1;
+ }
/**
- * Converts the first character of `string` to lower case.
+ * Removes all provided values from the given array using strict equality for
+ * comparisons, i.e. `===`.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the converted string.
+ * @category Arrays
+ * @param {Array} array The array to modify.
+ * @param {...*} [value] The values to remove.
+ * @returns {Array} Returns `array`.
* @example
*
- * _.lowerFirst('Fred');
- * // => 'fred'
- *
- * _.lowerFirst('FRED');
- * // => 'fRED'
+ * var array = [1, 2, 3, 1, 2, 3];
+ * _.pull(array, 2, 3);
+ * console.log(array);
+ * // => [1, 1]
*/
- var lowerFirst = createCaseFirst('toLowerCase');
+ function pull(array) {
+ var args = arguments,
+ argsIndex = 0,
+ argsLength = args.length,
+ length = array ? array.length : 0;
+
+ while (++argsIndex < argsLength) {
+ var index = -1,
+ value = args[argsIndex];
+ while (++index < length) {
+ if (array[index] === value) {
+ splice.call(array, index--, 1);
+ length--;
+ }
+ }
+ }
+ return array;
+ }
/**
- * Converts the first character of `string` to upper case.
+ * Creates an array of numbers (positive and/or negative) progressing from
+ * `start` up to but not including `end`. If `start` is less than `stop` a
+ * zero-length range is created unless a negative `step` is specified.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the converted string.
+ * @category Arrays
+ * @param {number} [start=0] The start of the range.
+ * @param {number} end The end of the range.
+ * @param {number} [step=1] The value to increment or decrement by.
+ * @returns {Array} Returns a new range array.
* @example
*
- * _.upperFirst('fred');
- * // => 'Fred'
+ * _.range(4);
+ * // => [0, 1, 2, 3]
*
- * _.upperFirst('FRED');
- * // => 'FRED'
- */
- var upperFirst = createCaseFirst('toUpperCase');
-
- /**
- * Pads `string` on the left and right sides if it's shorter than `length`.
- * Padding characters are truncated if they can't be evenly divided by `length`.
+ * _.range(1, 5);
+ * // => [1, 2, 3, 4]
*
- * @static
- * @memberOf _
- * @category String
- * @param {string} [string=''] The string to pad.
- * @param {number} [length=0] The padding length.
- * @param {string} [chars=' '] The string used as padding.
- * @returns {string} Returns the padded string.
- * @example
+ * _.range(0, 20, 5);
+ * // => [0, 5, 10, 15]
*
- * _.pad('abc', 8);
- * // => ' abc '
+ * _.range(0, -4, -1);
+ * // => [0, -1, -2, -3]
*
- * _.pad('abc', 8, '_-');
- * // => '_-abc_-_'
+ * _.range(1, 4, 0);
+ * // => [1, 1, 1]
*
- * _.pad('abc', 3);
- * // => 'abc'
+ * _.range(0);
+ * // => []
*/
- function pad(string, length, chars) {
- string = toString(string);
- length = toInteger(length);
+ function range(start, end, step) {
+ start = +start || 0;
+ step = typeof step == 'number' ? step : (+step || 1);
- var strLength = stringSize(string);
- if (!length || strLength >= length) {
- return string;
+ if (end == null) {
+ end = start;
+ start = 0;
}
- var mid = (length - strLength) / 2,
- leftLength = nativeFloor(mid),
- rightLength = nativeCeil(mid);
+ // use `Array(length)` so engines like Chakra and V8 avoid slower modes
+ // http://youtu.be/XAqIpGU8ZZk#t=17m25s
+ var index = -1,
+ length = nativeMax(0, ceil((end - start) / (step || 1))),
+ result = Array(length);
- return createPadding('', leftLength, chars) + string + createPadding('', rightLength, chars);
+ while (++index < length) {
+ result[index] = start;
+ start += step;
+ }
+ return result;
}
/**
- * Pads `string` on the right side if it's shorter than `length`. Padding
- * characters are truncated if they exceed `length`.
+ * Removes all elements from an array that the callback returns truey for
+ * and returns an array of removed elements. The callback is bound to `thisArg`
+ * and invoked with three arguments; (value, index, array).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to pad.
- * @param {number} [length=0] The padding length.
- * @param {string} [chars=' '] The string used as padding.
- * @returns {string} Returns the padded string.
+ * @category Arrays
+ * @param {Array} array The array to modify.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array} Returns a new array of removed elements.
* @example
*
- * _.padEnd('abc', 6);
- * // => 'abc '
+ * var array = [1, 2, 3, 4, 5, 6];
+ * var evens = _.remove(array, function(num) { return num % 2 == 0; });
*
- * _.padEnd('abc', 6, '_-');
- * // => 'abc_-_'
+ * console.log(array);
+ * // => [1, 3, 5]
*
- * _.padEnd('abc', 3);
- * // => 'abc'
+ * console.log(evens);
+ * // => [2, 4, 6]
*/
- function padEnd(string, length, chars) {
- string = toString(string);
- return string + createPadding(string, length, chars);
+ function remove(array, callback, thisArg) {
+ var index = -1,
+ length = array ? array.length : 0,
+ result = [];
+
+ callback = lodash.createCallback(callback, thisArg, 3);
+ while (++index < length) {
+ var value = array[index];
+ if (callback(value, index, array)) {
+ result.push(value);
+ splice.call(array, index--, 1);
+ length--;
+ }
+ }
+ return result;
}
/**
- * Pads `string` on the left side if it's shorter than `length`. Padding
- * characters are truncated if they exceed `length`.
+ * The opposite of `_.initial` this method gets all but the first element or
+ * first `n` elements of an array. If a callback function is provided elements
+ * at the beginning of the array are excluded from the result as long as the
+ * callback returns truey. The callback is bound to `thisArg` and invoked
+ * with three arguments; (value, index, array).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to pad.
- * @param {number} [length=0] The padding length.
- * @param {string} [chars=' '] The string used as padding.
- * @returns {string} Returns the padded string.
+ * @alias drop, tail
+ * @category Arrays
+ * @param {Array} array The array to query.
+ * @param {Function|Object|number|string} [callback=1] The function called
+ * per element or the number of elements to exclude. If a property name or
+ * object is provided it will be used to create a "_.pluck" or "_.where"
+ * style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array} Returns a slice of `array`.
* @example
*
- * _.padStart('abc', 6);
- * // => ' abc'
- *
- * _.padStart('abc', 6, '_-');
- * // => '_-_abc'
+ * _.rest([1, 2, 3]);
+ * // => [2, 3]
*
- * _.padStart('abc', 3);
- * // => 'abc'
- */
- function padStart(string, length, chars) {
- string = toString(string);
- return createPadding(string, length, chars) + string;
- }
-
- /**
- * Converts `string` to an integer of the specified radix. If `radix` is
- * `undefined` or `0`, a `radix` of `10` is used unless `value` is a hexadecimal,
- * in which case a `radix` of `16` is used.
+ * _.rest([1, 2, 3], 2);
+ * // => [3]
*
- * **Note:** This method aligns with the [ES5 implementation](https://es5.github.io/#x15.1.2.2)
- * of `parseInt`.
+ * _.rest([1, 2, 3], function(num) {
+ * return num < 3;
+ * });
+ * // => [3]
*
- * @static
- * @memberOf _
- * @category String
- * @param {string} string The string to convert.
- * @param {number} [radix=10] The radix to interpret `value` by.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {number} Returns the converted integer.
- * @example
+ * var characters = [
+ * { 'name': 'barney', 'blocked': true, 'employer': 'slate' },
+ * { 'name': 'fred', 'blocked': false, 'employer': 'slate' },
+ * { 'name': 'pebbles', 'blocked': true, 'employer': 'na' }
+ * ];
*
- * _.parseInt('08');
- * // => 8
+ * // using "_.pluck" callback shorthand
+ * _.pluck(_.rest(characters, 'blocked'), 'name');
+ * // => ['fred', 'pebbles']
*
- * _.map(['6', '08', '10'], _.parseInt);
- * // => [6, 8, 10]
+ * // using "_.where" callback shorthand
+ * _.rest(characters, { 'employer': 'slate' });
+ * // => [{ 'name': 'pebbles', 'blocked': true, 'employer': 'na' }]
*/
- function parseInt(string, radix, guard) {
- // Chrome fails to trim leading <BOM> whitespace characters.
- // See https://code.google.com/p/v8/issues/detail?id=3109 for more details.
- if (guard || radix == null) {
- radix = 0;
- } else if (radix) {
- radix = +radix;
+ function rest(array, callback, thisArg) {
+ if (typeof callback != 'number' && callback != null) {
+ var n = 0,
+ index = -1,
+ length = array ? array.length : 0;
+
+ callback = lodash.createCallback(callback, thisArg, 3);
+ while (++index < length && callback(array[index], index, array)) {
+ n++;
+ }
+ } else {
+ n = (callback == null || thisArg) ? 1 : nativeMax(0, callback);
}
- string = toString(string).replace(reTrim, '');
- return nativeParseInt(string, radix || (reHasHexPrefix.test(string) ? 16 : 10));
+ return slice(array, n);
}
/**
- * Repeats the given string `n` times.
+ * Uses a binary search to determine the smallest index at which a value
+ * should be inserted into a given sorted array in order to maintain the sort
+ * order of the array. If a callback is provided it will be executed for
+ * `value` and each element of `array` to compute their sort ranking. The
+ * callback is bound to `thisArg` and invoked with one argument; (value).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to repeat.
- * @param {number} [n=0] The number of times to repeat the string.
- * @returns {string} Returns the repeated string.
+ * @category Arrays
+ * @param {Array} array The array to inspect.
+ * @param {*} value The value to evaluate.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {number} Returns the index at which `value` should be inserted
+ * into `array`.
* @example
*
- * _.repeat('*', 3);
- * // => '***'
+ * _.sortedIndex([20, 30, 50], 40);
+ * // => 2
+ *
+ * // using "_.pluck" callback shorthand
+ * _.sortedIndex([{ 'x': 20 }, { 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x');
+ * // => 2
+ *
+ * var dict = {
+ * 'wordToNumber': { 'twenty': 20, 'thirty': 30, 'fourty': 40, 'fifty': 50 }
+ * };
*
- * _.repeat('abc', 2);
- * // => 'abcabc'
+ * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
+ * return dict.wordToNumber[word];
+ * });
+ * // => 2
*
- * _.repeat('abc', 0);
- * // => ''
+ * _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
+ * return this.wordToNumber[word];
+ * }, dict);
+ * // => 2
*/
- function repeat(string, n) {
- string = toString(string);
- n = toInteger(n);
+ function sortedIndex(array, value, callback, thisArg) {
+ var low = 0,
+ high = array ? array.length : low;
- var result = '';
- if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
- return result;
- }
- // Leverage the exponentiation by squaring algorithm for a faster repeat.
- // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
- do {
- if (n % 2) {
- result += string;
- }
- n = nativeFloor(n / 2);
- string += string;
- } while (n);
+ // explicitly reference `identity` for better inlining in Firefox
+ callback = callback ? lodash.createCallback(callback, thisArg, 1) : identity;
+ value = callback(value);
- return result;
+ while (low < high) {
+ var mid = (low + high) >>> 1;
+ (callback(array[mid]) < value)
+ ? low = mid + 1
+ : high = mid;
+ }
+ return low;
}
/**
- * Replaces matches for `pattern` in `string` with `replacement`.
- *
- * **Note:** This method is based on [`String#replace`](https://mdn.io/String/replace).
+ * Creates an array of unique values, in order, of the provided arrays using
+ * strict equality for comparisons, i.e. `===`.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to modify.
- * @param {RegExp|string} pattern The pattern to replace.
- * @param {Function|string} replacement The match replacement.
- * @returns {string} Returns the modified string.
+ * @category Arrays
+ * @param {...Array} [array] The arrays to inspect.
+ * @returns {Array} Returns an array of combined values.
* @example
*
- * _.replace('Hi Fred', 'Fred', 'Barney');
- * // => 'Hi Barney'
+ * _.union([1, 2, 3], [5, 2, 1, 4], [2, 1]);
+ * // => [1, 2, 3, 5, 4]
*/
- function replace() {
- var args = arguments,
- string = toString(args[0]);
-
- return args.length < 3 ? string : string.replace(args[1], args[2]);
+ function union() {
+ return baseUniq(baseFlatten(arguments, true, true));
}
/**
- * Converts `string` to [snake case](https://en.wikipedia.org/wiki/Snake_case).
+ * Creates a duplicate-value-free version of an array using strict equality
+ * for comparisons, i.e. `===`. If the array is sorted, providing
+ * `true` for `isSorted` will use a faster algorithm. If a callback is provided
+ * each element of `array` is passed through the callback before uniqueness
+ * is computed. The callback is bound to `thisArg` and invoked with three
+ * arguments; (value, index, array).
+ *
+ * If a property name is provided for `callback` the created "_.pluck" style
+ * callback will return the property value of the given element.
+ *
+ * If an object is provided for `callback` the created "_.where" style callback
+ * will return `true` for elements that have the properties of the given object,
+ * else `false`.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the snake cased string.
+ * @alias unique
+ * @category Arrays
+ * @param {Array} array The array to process.
+ * @param {boolean} [isSorted=false] A flag to indicate that `array` is sorted.
+ * @param {Function|Object|string} [callback=identity] The function called
+ * per iteration. If a property name or object is provided it will be used
+ * to create a "_.pluck" or "_.where" style callback, respectively.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array} Returns a duplicate-value-free array.
* @example
*
- * _.snakeCase('Foo Bar');
- * // => 'foo_bar'
- *
- * _.snakeCase('fooBar');
- * // => 'foo_bar'
+ * _.uniq([1, 2, 1, 3, 1]);
+ * // => [1, 2, 3]
*
- * _.snakeCase('--foo-bar');
- * // => 'foo_bar'
- */
- var snakeCase = createCompounder(function(result, word, index) {
- return result + (index ? '_' : '') + word.toLowerCase();
- });
-
- /**
- * Splits `string` by `separator`.
+ * _.uniq([1, 1, 2, 2, 3], true);
+ * // => [1, 2, 3]
*
- * **Note:** This method is based on [`String#split`](https://mdn.io/String/split).
+ * _.uniq(['A', 'b', 'C', 'a', 'B', 'c'], function(letter) { return letter.toLowerCase(); });
+ * // => ['A', 'b', 'C']
*
- * @static
- * @memberOf _
- * @category String
- * @param {string} [string=''] The string to split.
- * @param {RegExp|string} separator The separator pattern to split by.
- * @param {number} [limit] The length to truncate results to.
- * @returns {Array} Returns the new array of string segments.
- * @example
+ * _.uniq([1, 2.5, 3, 1.5, 2, 3.5], function(num) { return this.floor(num); }, Math);
+ * // => [1, 2.5, 3]
*
- * _.split('a-b-c', '-', 2);
- * // => ['a', 'b']
+ * // using "_.pluck" callback shorthand
+ * _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
+ * // => [{ 'x': 1 }, { 'x': 2 }]
*/
- function split(string, separator, limit) {
- return toString(string).split(separator, limit);
+ function uniq(array, isSorted, callback, thisArg) {
+ // juggle arguments
+ if (typeof isSorted != 'boolean' && isSorted != null) {
+ thisArg = callback;
+ callback = (typeof isSorted != 'function' && thisArg && thisArg[isSorted] === array) ? null : isSorted;
+ isSorted = false;
+ }
+ if (callback != null) {
+ callback = lodash.createCallback(callback, thisArg, 3);
+ }
+ return baseUniq(array, isSorted, callback);
}
/**
- * Converts `string` to [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
+ * Creates an array excluding all provided values using strict equality for
+ * comparisons, i.e. `===`.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the start cased string.
+ * @category Arrays
+ * @param {Array} array The array to filter.
+ * @param {...*} [value] The values to exclude.
+ * @returns {Array} Returns a new array of filtered values.
* @example
*
- * _.startCase('--foo-bar');
- * // => 'Foo Bar'
- *
- * _.startCase('fooBar');
- * // => 'Foo Bar'
- *
- * _.startCase('__foo_bar__');
- * // => 'Foo Bar'
+ * _.without([1, 2, 1, 0, 3, 1, 4], 0, 1);
+ * // => [2, 3, 4]
*/
- var startCase = createCompounder(function(result, word, index) {
- return result + (index ? ' ' : '') + capitalize(word);
- });
+ function without(array) {
+ return baseDifference(array, slice(arguments, 1));
+ }
/**
- * Checks if `string` starts with the given target string.
+ * Creates an array that is the symmetric difference of the provided arrays.
+ * See http://en.wikipedia.org/wiki/Symmetric_difference.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to search.
- * @param {string} [target] The string to search for.
- * @param {number} [position=0] The position to search from.
- * @returns {boolean} Returns `true` if `string` starts with `target`, else `false`.
+ * @category Arrays
+ * @param {...Array} [array] The arrays to inspect.
+ * @returns {Array} Returns an array of values.
* @example
*
- * _.startsWith('abc', 'a');
- * // => true
- *
- * _.startsWith('abc', 'b');
- * // => false
+ * _.xor([1, 2, 3], [5, 2, 1, 4]);
+ * // => [3, 5, 4]
*
- * _.startsWith('abc', 'b', 1);
- * // => true
+ * _.xor([1, 2, 5], [2, 3, 5], [3, 4, 5]);
+ * // => [1, 4, 5]
*/
- function startsWith(string, target, position) {
- string = toString(string);
- position = baseClamp(toInteger(position), 0, string.length);
- return string.lastIndexOf(target, position) == position;
+ function xor() {
+ var index = -1,
+ length = arguments.length;
+
+ while (++index < length) {
+ var array = arguments[index];
+ if (isArray(array) || isArguments(array)) {
+ var result = result
+ ? baseUniq(baseDifference(result, array).concat(baseDifference(array, result)))
+ : array;
+ }
+ }
+ return result || [];
}
/**
- * Creates a compiled template function that can interpolate data properties
- * in "interpolate" delimiters, HTML-escape interpolated data properties in
- * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
- * properties may be accessed as free variables in the template. If a setting
- * object is given it takes precedence over `_.templateSettings` values.
- *
- * **Note:** In the development build `_.template` utilizes
- * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
- * for easier debugging.
- *
- * For more information on precompiling templates see
- * [lodash's custom builds documentation](https://lodash.com/custom-builds).
- *
- * For more information on Chrome extension sandboxes see
- * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
+ * Creates an array of grouped elements, the first of which contains the first
+ * elements of the given arrays, the second of which contains the second
+ * elements of the given arrays, and so on.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The template string.
- * @param {Object} [options] The options object.
- * @param {RegExp} [options.escape] The HTML "escape" delimiter.
- * @param {RegExp} [options.evaluate] The "evaluate" delimiter.
- * @param {Object} [options.imports] An object to import into the template as free variables.
- * @param {RegExp} [options.interpolate] The "interpolate" delimiter.
- * @param {string} [options.sourceURL] The sourceURL of the template's compiled source.
- * @param {string} [options.variable] The data object variable name.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {Function} Returns the compiled template function.
+ * @alias unzip
+ * @category Arrays
+ * @param {...Array} [array] Arrays to process.
+ * @returns {Array} Returns a new array of grouped elements.
* @example
*
- * // Use the "interpolate" delimiter to create a compiled template.
- * var compiled = _.template('hello <%= user %>!');
- * compiled({ 'user': 'fred' });
- * // => 'hello fred!'
- *
- * // Use the HTML "escape" delimiter to escape data property values.
- * var compiled = _.template('<b><%- value %></b>');
- * compiled({ 'value': '<script>' });
- * // => '<b><script></b>'
- *
- * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
- * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
- * compiled({ 'users': ['fred', 'barney'] });
- * // => '<li>fred</li><li>barney</li>'
- *
- * // Use the internal `print` function in "evaluate" delimiters.
- * var compiled = _.template('<% print("hello " + user); %>!');
- * compiled({ 'user': 'barney' });
- * // => 'hello barney!'
- *
- * // Use the ES delimiter as an alternative to the default "interpolate" delimiter.
- * var compiled = _.template('hello ${ user }!');
- * compiled({ 'user': 'pebbles' });
- * // => 'hello pebbles!'
- *
- * // Use custom template delimiters.
- * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
- * var compiled = _.template('hello {{ user }}!');
- * compiled({ 'user': 'mustache' });
- * // => 'hello mustache!'
- *
- * // Use backslashes to treat delimiters as plain text.
- * var compiled = _.template('<%= "\\<%- value %\\>" %>');
- * compiled({ 'value': 'ignored' });
- * // => '<%- value %>'
- *
- * // Use the `imports` option to import `jQuery` as `jq`.
- * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
- * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
- * compiled({ 'users': ['fred', 'barney'] });
- * // => '<li>fred</li><li>barney</li>'
- *
- * // Use the `sourceURL` option to specify a custom sourceURL for the template.
- * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
- * compiled(data);
- * // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector
- *
- * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
- * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
- * compiled.source;
- * // => function(data) {
- * // var __t, __p = '';
- * // __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
- * // return __p;
- * // }
- *
- * // Use the `source` property to inline compiled templates for meaningful
- * // line numbers in error messages and stack traces.
- * fs.writeFileSync(path.join(cwd, 'jst.js'), '\
- * var JST = {\
- * "main": ' + _.template(mainText).source + '\
- * };\
- * ');
+ * _.zip(['fred', 'barney'], [30, 40], [true, false]);
+ * // => [['fred', 30, true], ['barney', 40, false]]
*/
- function template(string, options, guard) {
- // Based on John Resig's `tmpl` implementation (http://ejohn.org/blog/javascript-micro-templating/)
- // and Laura Doktorova's doT.js (https://github.com/olado/doT).
- var settings = lodash.templateSettings;
-
- if (guard && isIterateeCall(string, options, guard)) {
- options = undefined;
- }
- string = toString(string);
- options = assignInWith({}, options, settings, assignInDefaults);
-
- var imports = assignInWith({}, options.imports, settings.imports, assignInDefaults),
- importsKeys = keys(imports),
- importsValues = baseValues(imports, importsKeys);
-
- var isEscaping,
- isEvaluating,
- index = 0,
- interpolate = options.interpolate || reNoMatch,
- source = "__p += '";
-
- // Compile the regexp to match each delimiter.
- var reDelimiters = RegExp(
- (options.escape || reNoMatch).source + '|' +
- interpolate.source + '|' +
- (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
- (options.evaluate || reNoMatch).source + '|$'
- , 'g');
-
- // Use a sourceURL for easier debugging.
- var sourceURL = '//# sourceURL=' +
- ('sourceURL' in options
- ? options.sourceURL
- : ('lodash.templateSources[' + (++templateCounter) + ']')
- ) + '\n';
-
- string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
- interpolateValue || (interpolateValue = esTemplateValue);
-
- // Escape characters that can't be included in string literals.
- source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);
-
- // Replace delimiters with snippets.
- if (escapeValue) {
- isEscaping = true;
- source += "' +\n__e(" + escapeValue + ") +\n'";
- }
- if (evaluateValue) {
- isEvaluating = true;
- source += "';\n" + evaluateValue + ";\n__p += '";
- }
- if (interpolateValue) {
- source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
- }
- index = offset + match.length;
-
- // The JS engine embedded in Adobe products needs `match` returned in
- // order to produce the correct `offset` value.
- return match;
- });
-
- source += "';\n";
-
- // If `variable` is not specified wrap a with-statement around the generated
- // code to add the data object to the top of the scope chain.
- var variable = options.variable;
- if (!variable) {
- source = 'with (obj) {\n' + source + '\n}\n';
- }
- // Cleanup code by stripping empty strings.
- source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
- .replace(reEmptyStringMiddle, '$1')
- .replace(reEmptyStringTrailing, '$1;');
-
- // Frame code as the function body.
- source = 'function(' + (variable || 'obj') + ') {\n' +
- (variable
- ? ''
- : 'obj || (obj = {});\n'
- ) +
- "var __t, __p = ''" +
- (isEscaping
- ? ', __e = _.escape'
- : ''
- ) +
- (isEvaluating
- ? ', __j = Array.prototype.join;\n' +
- "function print() { __p += __j.call(arguments, '') }\n"
- : ';\n'
- ) +
- source +
- 'return __p\n}';
-
- var result = attempt(function() {
- return Function(importsKeys, sourceURL + 'return ' + source)
- .apply(undefined, importsValues);
- });
+ function zip() {
+ var array = arguments.length > 1 ? arguments : arguments[0],
+ index = -1,
+ length = array ? max(pluck(array, 'length')) : 0,
+ result = Array(length < 0 ? 0 : length);
- // Provide the compiled function's source by its `toString` method or
- // the `source` property as a convenience for inlining compiled templates.
- result.source = source;
- if (isError(result)) {
- throw result;
+ while (++index < length) {
+ result[index] = pluck(array, index);
}
return result;
}
/**
- * Converts `string`, as a whole, to lower case just like
- * [String#toLowerCase](https://mdn.io/toLowerCase).
+ * Creates an object composed from arrays of `keys` and `values`. Provide
+ * either a single two dimensional array, i.e. `[[key1, value1], [key2, value2]]`
+ * or two arrays, one of `keys` and one of corresponding `values`.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the lower cased string.
+ * @alias object
+ * @category Arrays
+ * @param {Array} keys The array of keys.
+ * @param {Array} [values=[]] The array of values.
+ * @returns {Object} Returns an object composed of the given keys and
+ * corresponding values.
* @example
*
- * _.toLower('--Foo-Bar');
- * // => '--foo-bar'
- *
- * _.toLower('fooBar');
- * // => 'foobar'
- *
- * _.toLower('__FOO_BAR__');
- * // => '__foo_bar__'
+ * _.zipObject(['fred', 'barney'], [30, 40]);
+ * // => { 'fred': 30, 'barney': 40 }
*/
- function toLower(value) {
- return toString(value).toLowerCase();
+ function zipObject(keys, values) {
+ var index = -1,
+ length = keys ? keys.length : 0,
+ result = {};
+
+ if (!values && length && !isArray(keys[0])) {
+ values = [];
+ }
+ while (++index < length) {
+ var key = keys[index];
+ if (values) {
+ result[key] = values[index];
+ } else if (key) {
+ result[key[0]] = key[1];
+ }
+ }
+ return result;
}
+ /*--------------------------------------------------------------------------*/
+
/**
- * Converts `string`, as a whole, to upper case just like
- * [String#toUpperCase](https://mdn.io/toUpperCase).
+ * Creates a function that executes `func`, with the `this` binding and
+ * arguments of the created function, only after being called `n` times.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the upper cased string.
+ * @category Functions
+ * @param {number} n The number of times the function must be called before
+ * `func` is executed.
+ * @param {Function} func The function to restrict.
+ * @returns {Function} Returns the new restricted function.
* @example
*
- * _.toUpper('--foo-bar');
- * // => '--FOO-BAR'
+ * var saves = ['profile', 'settings'];
*
- * _.toUpper('fooBar');
- * // => 'FOOBAR'
+ * var done = _.after(saves.length, function() {
+ * console.log('Done saving!');
+ * });
*
- * _.toUpper('__foo_bar__');
- * // => '__FOO_BAR__'
+ * _.forEach(saves, function(type) {
+ * asyncSave({ 'type': type, 'complete': done });
+ * });
+ * // => logs 'Done saving!', after all saves have completed
*/
- function toUpper(value) {
- return toString(value).toUpperCase();
+ function after(n, func) {
+ if (!isFunction(func)) {
+ throw new TypeError;
+ }
+ return function() {
+ if (--n < 1) {
+ return func.apply(this, arguments);
+ }
+ };
}
/**
- * Removes leading and trailing whitespace or specified characters from `string`.
+ * Creates a function that, when called, invokes `func` with the `this`
+ * binding of `thisArg` and prepends any additional `bind` arguments to those
+ * provided to the bound function.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to trim.
- * @param {string} [chars=whitespace] The characters to trim.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {string} Returns the trimmed string.
+ * @category Functions
+ * @param {Function} func The function to bind.
+ * @param {*} [thisArg] The `this` binding of `func`.
+ * @param {...*} [arg] Arguments to be partially applied.
+ * @returns {Function} Returns the new bound function.
* @example
*
- * _.trim(' abc ');
- * // => 'abc'
- *
- * _.trim('-_-abc-_-', '_-');
- * // => 'abc'
+ * var func = function(greeting) {
+ * return greeting + ' ' + this.name;
+ * };
*
- * _.map([' foo ', ' bar '], _.trim);
- * // => ['foo', 'bar']
+ * func = _.bind(func, { 'name': 'fred' }, 'hi');
+ * func();
+ * // => 'hi fred'
*/
- function trim(string, chars, guard) {
- string = toString(string);
- if (!string) {
- return string;
- }
- if (guard || chars === undefined) {
- return string.replace(reTrim, '');
- }
- chars = (chars + '');
- if (!chars) {
- return string;
- }
- var strSymbols = stringToArray(string),
- chrSymbols = stringToArray(chars);
-
- return strSymbols
- .slice(charsStartIndex(strSymbols, chrSymbols), charsEndIndex(strSymbols, chrSymbols) + 1)
- .join('');
+ function bind(func, thisArg) {
+ return arguments.length > 2
+ ? createWrapper(func, 17, slice(arguments, 2), null, thisArg)
+ : createWrapper(func, 1, null, null, thisArg);
}
/**
- * Removes trailing whitespace or specified characters from `string`.
+ * Binds methods of an object to the object itself, overwriting the existing
+ * method. Method names may be specified as individual arguments or as arrays
+ * of method names. If no method names are provided all the function properties
+ * of `object` will be bound.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to trim.
- * @param {string} [chars=whitespace] The characters to trim.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {string} Returns the trimmed string.
+ * @category Functions
+ * @param {Object} object The object to bind and assign the bound methods to.
+ * @param {...string} [methodName] The object method names to
+ * bind, specified as individual method names or arrays of method names.
+ * @returns {Object} Returns `object`.
* @example
*
- * _.trimEnd(' abc ');
- * // => ' abc'
+ * var view = {
+ * 'label': 'docs',
+ * 'onClick': function() { console.log('clicked ' + this.label); }
+ * };
*
- * _.trimEnd('-_-abc-_-', '_-');
- * // => '-_-abc'
+ * _.bindAll(view);
+ * jQuery('#docs').on('click', view.onClick);
+ * // => logs 'clicked docs', when the button is clicked
*/
- function trimEnd(string, chars, guard) {
- string = toString(string);
- if (!string) {
- return string;
- }
- if (guard || chars === undefined) {
- return string.replace(reTrimEnd, '');
- }
- chars = (chars + '');
- if (!chars) {
- return string;
+ function bindAll(object) {
+ var funcs = arguments.length > 1 ? baseFlatten(arguments, true, false, 1) : functions(object),
+ index = -1,
+ length = funcs.length;
+
+ while (++index < length) {
+ var key = funcs[index];
+ object[key] = createWrapper(object[key], 1, null, null, object);
}
- var strSymbols = stringToArray(string);
- return strSymbols
- .slice(0, charsEndIndex(strSymbols, stringToArray(chars)) + 1)
- .join('');
+ return object;
}
/**
- * Removes leading whitespace or specified characters from `string`.
+ * Creates a function that, when called, invokes the method at `object[key]`
+ * and prepends any additional `bindKey` arguments to those provided to the bound
+ * function. This method differs from `_.bind` by allowing bound functions to
+ * reference methods that will be redefined or don't yet exist.
+ * See http://michaux.ca/articles/lazy-function-definition-pattern.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to trim.
- * @param {string} [chars=whitespace] The characters to trim.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {string} Returns the trimmed string.
+ * @category Functions
+ * @param {Object} object The object the method belongs to.
+ * @param {string} key The key of the method.
+ * @param {...*} [arg] Arguments to be partially applied.
+ * @returns {Function} Returns the new bound function.
* @example
*
- * _.trimStart(' abc ');
- * // => 'abc '
+ * var object = {
+ * 'name': 'fred',
+ * 'greet': function(greeting) {
+ * return greeting + ' ' + this.name;
+ * }
+ * };
+ *
+ * var func = _.bindKey(object, 'greet', 'hi');
+ * func();
+ * // => 'hi fred'
+ *
+ * object.greet = function(greeting) {
+ * return greeting + 'ya ' + this.name + '!';
+ * };
*
- * _.trimStart('-_-abc-_-', '_-');
- * // => 'abc-_-'
+ * func();
+ * // => 'hiya fred!'
*/
- function trimStart(string, chars, guard) {
- string = toString(string);
- if (!string) {
- return string;
- }
- if (guard || chars === undefined) {
- return string.replace(reTrimStart, '');
- }
- chars = (chars + '');
- if (!chars) {
- return string;
- }
- var strSymbols = stringToArray(string);
- return strSymbols
- .slice(charsStartIndex(strSymbols, stringToArray(chars)))
- .join('');
+ function bindKey(object, key) {
+ return arguments.length > 2
+ ? createWrapper(key, 19, slice(arguments, 2), null, object)
+ : createWrapper(key, 3, null, null, object);
}
/**
- * Truncates `string` if it's longer than the given maximum string length.
- * The last characters of the truncated string are replaced with the omission
- * string which defaults to "...".
+ * Creates a function that is the composition of the provided functions,
+ * where each function consumes the return value of the function that follows.
+ * For example, composing the functions `f()`, `g()`, and `h()` produces `f(g(h()))`.
+ * Each function is executed with the `this` binding of the composed function.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to truncate.
- * @param {Object} [options=({})] The options object.
- * @param {number} [options.length=30] The maximum string length.
- * @param {string} [options.omission='...'] The string to indicate text is omitted.
- * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
- * @returns {string} Returns the truncated string.
+ * @category Functions
+ * @param {...Function} [func] Functions to compose.
+ * @returns {Function} Returns the new composed function.
* @example
*
- * _.truncate('hi-diddly-ho there, neighborino');
- * // => 'hi-diddly-ho there, neighbo...'
+ * var realNameMap = {
+ * 'pebbles': 'penelope'
+ * };
*
- * _.truncate('hi-diddly-ho there, neighborino', {
- * 'length': 24,
- * 'separator': ' '
- * });
- * // => 'hi-diddly-ho there,...'
+ * var format = function(name) {
+ * name = realNameMap[name.toLowerCase()] || name;
+ * return name.charAt(0).toUpperCase() + name.slice(1).toLowerCase();
+ * };
*
- * _.truncate('hi-diddly-ho there, neighborino', {
- * 'length': 24,
- * 'separator': /,? +/
- * });
- * // => 'hi-diddly-ho there...'
+ * var greet = function(formatted) {
+ * return 'Hiya ' + formatted + '!';
+ * };
*
- * _.truncate('hi-diddly-ho there, neighborino', {
- * 'omission': ' [...]'
- * });
- * // => 'hi-diddly-ho there, neig [...]'
+ * var welcome = _.compose(greet, format);
+ * welcome('pebbles');
+ * // => 'Hiya Penelope!'
*/
- function truncate(string, options) {
- var length = DEFAULT_TRUNC_LENGTH,
- omission = DEFAULT_TRUNC_OMISSION;
-
- if (isObject(options)) {
- var separator = 'separator' in options ? options.separator : separator;
- length = 'length' in options ? toInteger(options.length) : length;
- omission = 'omission' in options ? toString(options.omission) : omission;
- }
- string = toString(string);
-
- var strLength = string.length;
- if (reHasComplexSymbol.test(string)) {
- var strSymbols = stringToArray(string);
- strLength = strSymbols.length;
- }
- if (length >= strLength) {
- return string;
- }
- var end = length - stringSize(omission);
- if (end < 1) {
- return omission;
- }
- var result = strSymbols
- ? strSymbols.slice(0, end).join('')
- : string.slice(0, end);
+ function compose() {
+ var funcs = arguments,
+ length = funcs.length;
- if (separator === undefined) {
- return result + omission;
- }
- if (strSymbols) {
- end += (result.length - end);
+ while (length--) {
+ if (!isFunction(funcs[length])) {
+ throw new TypeError;
+ }
}
- if (isRegExp(separator)) {
- if (string.slice(end).search(separator)) {
- var match,
- substring = result;
+ return function() {
+ var args = arguments,
+ length = funcs.length;
- if (!separator.global) {
- separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
- }
- separator.lastIndex = 0;
- while ((match = separator.exec(substring))) {
- var newEnd = match.index;
- }
- result = result.slice(0, newEnd === undefined ? end : newEnd);
- }
- } else if (string.indexOf(separator, end) != end) {
- var index = result.lastIndexOf(separator);
- if (index > -1) {
- result = result.slice(0, index);
+ while (length--) {
+ args = [funcs[length].apply(this, args)];
}
- }
- return result + omission;
+ return args[0];
+ };
}
/**
- * The inverse of `_.escape`; this method converts the HTML entities
- * `&`, `<`, `>`, `"`, `'`, and ``` in `string` to their
- * corresponding characters.
- *
- * **Note:** No other HTML entities are unescaped. To unescape additional HTML
- * entities use a third-party library like [_he_](https://mths.be/he).
+ * Creates a function which accepts one or more arguments of `func` that when
+ * invoked either executes `func` returning its result, if all `func` arguments
+ * have been provided, or returns a function that accepts one or more of the
+ * remaining `func` arguments, and so on. The arity of `func` can be specified
+ * if `func.length` is not sufficient.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to unescape.
- * @returns {string} Returns the unescaped string.
+ * @category Functions
+ * @param {Function} func The function to curry.
+ * @param {number} [arity=func.length] The arity of `func`.
+ * @returns {Function} Returns the new curried function.
* @example
*
- * _.unescape('fred, barney, & pebbles');
- * // => 'fred, barney, & pebbles'
- */
- function unescape(string) {
- string = toString(string);
- return (string && reHasEscapedHtml.test(string))
- ? string.replace(reEscapedHtml, unescapeHtmlChar)
- : string;
- }
-
- /**
- * Converts `string`, as space separated words, to upper case.
- *
- * @static
- * @memberOf _
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the upper cased string.
- * @example
+ * var curried = _.curry(function(a, b, c) {
+ * console.log(a + b + c);
+ * });
*
- * _.upperCase('--foo-bar');
- * // => 'FOO BAR'
+ * curried(1)(2)(3);
+ * // => 6
*
- * _.upperCase('fooBar');
- * // => 'FOO BAR'
+ * curried(1, 2)(3);
+ * // => 6
*
- * _.upperCase('__foo_bar__');
- * // => 'FOO BAR'
+ * curried(1, 2, 3);
+ * // => 6
*/
- var upperCase = createCompounder(function(result, word, index) {
- return result + (index ? ' ' : '') + word.toUpperCase();
- });
+ function curry(func, arity) {
+ arity = typeof arity == 'number' ? arity : (+arity || func.length);
+ return createWrapper(func, 4, null, null, null, arity);
+ }
/**
- * Splits `string` into an array of its words.
+ * Creates a function that will delay the execution of `func` until after
+ * `wait` milliseconds have elapsed since the last time it was invoked.
+ * Provide an options object to indicate that `func` should be invoked on
+ * the leading and/or trailing edge of the `wait` timeout. Subsequent calls
+ * to the debounced function will return the result of the last `func` call.
+ *
+ * Note: If `leading` and `trailing` options are `true` `func` will be called
+ * on the trailing edge of the timeout only if the the debounced function is
+ * invoked more than once during the `wait` timeout.
*
* @static
* @memberOf _
- * @category String
- * @param {string} [string=''] The string to inspect.
- * @param {RegExp|string} [pattern] The pattern to match words.
- * @param- {Object} [guard] Enables use as an iteratee for functions like `_.map`.
- * @returns {Array} Returns the words of `string`.
+ * @category Functions
+ * @param {Function} func The function to debounce.
+ * @param {number} wait The number of milliseconds to delay.
+ * @param {Object} [options] The options object.
+ * @param {boolean} [options.leading=false] Specify execution on the leading edge of the timeout.
+ * @param {number} [options.maxWait] The maximum time `func` is allowed to be delayed before it's called.
+ * @param {boolean} [options.trailing=true] Specify execution on the trailing edge of the timeout.
+ * @returns {Function} Returns the new debounced function.
* @example
*
- * _.words('fred, barney, & pebbles');
- * // => ['fred', 'barney', 'pebbles']
+ * // avoid costly calculations while the window size is in flux
+ * var lazyLayout = _.debounce(calculateLayout, 150);
+ * jQuery(window).on('resize', lazyLayout);
+ *
+ * // execute `sendMail` when the click event is fired, debouncing subsequent calls
+ * jQuery('#postbox').on('click', _.debounce(sendMail, 300, {
+ * 'leading': true,
+ * 'trailing': false
+ * });
*
- * _.words('fred, barney, & pebbles', /[^, ]+/g);
- * // => ['fred', 'barney', '&', 'pebbles']
+ * // ensure `batchLog` is executed once after 1 second of debounced calls
+ * var source = new EventSource('/stream');
+ * source.addEventListener('message', _.debounce(batchLog, 250, {
+ * 'maxWait': 1000
+ * }, false);
*/
- function words(string, pattern, guard) {
- string = toString(string);
- pattern = guard ? undefined : pattern;
+ function debounce(func, wait, options) {
+ var args,
+ maxTimeoutId,
+ result,
+ stamp,
+ thisArg,
+ timeoutId,
+ trailingCall,
+ lastCalled = 0,
+ maxWait = false,
+ trailing = true;
- if (pattern === undefined) {
- pattern = reHasComplexWord.test(string) ? reComplexWord : reBasicWord;
+ if (!isFunction(func)) {
+ throw new TypeError;
}
- return string.match(pattern) || [];
- }
+ wait = nativeMax(0, wait) || 0;
+ if (options === true) {
+ var leading = true;
+ trailing = false;
+ } else if (isObject(options)) {
+ leading = options.leading;
+ maxWait = 'maxWait' in options && (nativeMax(wait, options.maxWait) || 0);
+ trailing = 'trailing' in options ? options.trailing : trailing;
+ }
+ var delayed = function() {
+ var remaining = wait - (now() - stamp);
+ if (remaining <= 0) {
+ if (maxTimeoutId) {
+ clearTimeout(maxTimeoutId);
+ }
+ var isCalled = trailingCall;
+ maxTimeoutId = timeoutId = trailingCall = undefined;
+ if (isCalled) {
+ lastCalled = now();
+ result = func.apply(thisArg, args);
+ if (!timeoutId && !maxTimeoutId) {
+ args = thisArg = null;
+ }
+ }
+ } else {
+ timeoutId = setTimeout(delayed, remaining);
+ }
+ };
+
+ var maxDelayed = function() {
+ if (timeoutId) {
+ clearTimeout(timeoutId);
+ }
+ maxTimeoutId = timeoutId = trailingCall = undefined;
+ if (trailing || (maxWait !== wait)) {
+ lastCalled = now();
+ result = func.apply(thisArg, args);
+ if (!timeoutId && !maxTimeoutId) {
+ args = thisArg = null;
+ }
+ }
+ };
+
+ return function() {
+ args = arguments;
+ stamp = now();
+ thisArg = this;
+ trailingCall = trailing && (timeoutId || !leading);
+
+ if (maxWait === false) {
+ var leadingCall = leading && !timeoutId;
+ } else {
+ if (!maxTimeoutId && !leading) {
+ lastCalled = stamp;
+ }
+ var remaining = maxWait - (stamp - lastCalled),
+ isCalled = remaining <= 0;
- /*------------------------------------------------------------------------*/
+ if (isCalled) {
+ if (maxTimeoutId) {
+ maxTimeoutId = clearTimeout(maxTimeoutId);
+ }
+ lastCalled = stamp;
+ result = func.apply(thisArg, args);
+ }
+ else if (!maxTimeoutId) {
+ maxTimeoutId = setTimeout(maxDelayed, remaining);
+ }
+ }
+ if (isCalled && timeoutId) {
+ timeoutId = clearTimeout(timeoutId);
+ }
+ else if (!timeoutId && wait !== maxWait) {
+ timeoutId = setTimeout(delayed, wait);
+ }
+ if (leadingCall) {
+ isCalled = true;
+ result = func.apply(thisArg, args);
+ }
+ if (isCalled && !timeoutId && !maxTimeoutId) {
+ args = thisArg = null;
+ }
+ return result;
+ };
+ }
/**
- * Attempts to invoke `func`, returning either the result or the caught error
- * object. Any additional arguments are provided to `func` when it's invoked.
+ * Defers executing the `func` function until the current call stack has cleared.
+ * Additional arguments will be provided to `func` when it is invoked.
*
* @static
* @memberOf _
- * @category Util
- * @param {Function} func The function to attempt.
- * @returns {*} Returns the `func` result or error object.
+ * @category Functions
+ * @param {Function} func The function to defer.
+ * @param {...*} [arg] Arguments to invoke the function with.
+ * @returns {number} Returns the timer id.
* @example
*
- * // Avoid throwing errors for invalid selectors.
- * var elements = _.attempt(function(selector) {
- * return document.querySelectorAll(selector);
- * }, '>_>');
- *
- * if (_.isError(elements)) {
- * elements = [];
- * }
+ * _.defer(function(text) { console.log(text); }, 'deferred');
+ * // logs 'deferred' after one or more milliseconds
*/
- var attempt = rest(function(func, args) {
- try {
- return apply(func, undefined, args);
- } catch (e) {
- return isError(e) ? e : new Error(e);
+ function defer(func) {
+ if (!isFunction(func)) {
+ throw new TypeError;
}
- });
+ var args = slice(arguments, 1);
+ return setTimeout(function() { func.apply(undefined, args); }, 1);
+ }
/**
- * Binds methods of an object to the object itself, overwriting the existing
- * method.
- *
- * **Note:** This method doesn't set the "length" property of bound functions.
+ * Executes the `func` function after `wait` milliseconds. Additional arguments
+ * will be provided to `func` when it is invoked.
*
* @static
* @memberOf _
- * @category Util
- * @param {Object} object The object to bind and assign the bound methods to.
- * @param {...(string|string[])} methodNames The object method names to bind,
- * specified individually or in arrays.
- * @returns {Object} Returns `object`.
+ * @category Functions
+ * @param {Function} func The function to delay.
+ * @param {number} wait The number of milliseconds to delay execution.
+ * @param {...*} [arg] Arguments to invoke the function with.
+ * @returns {number} Returns the timer id.
* @example
*
- * var view = {
- * 'label': 'docs',
- * 'onClick': function() {
- * console.log('clicked ' + this.label);
- * }
- * };
- *
- * _.bindAll(view, 'onClick');
- * jQuery(element).on('click', view.onClick);
- * // => logs 'clicked docs' when clicked
+ * _.delay(function(text) { console.log(text); }, 1000, 'later');
+ * // => logs 'later' after one second
*/
- var bindAll = rest(function(object, methodNames) {
- arrayEach(baseFlatten(methodNames, 1), function(key) {
- object[key] = bind(object[key], object);
- });
- return object;
- });
+ function delay(func, wait) {
+ if (!isFunction(func)) {
+ throw new TypeError;
+ }
+ var args = slice(arguments, 2);
+ return setTimeout(function() { func.apply(undefined, args); }, wait);
+ }
/**
- * Creates a function that iterates over `pairs` invoking the corresponding
- * function of the first predicate to return truthy. The predicate-function
- * pairs are invoked with the `this` binding and arguments of the created
- * function.
+ * Creates a function that memoizes the result of `func`. If `resolver` is
+ * provided it will be used to determine the cache key for storing the result
+ * based on the arguments provided to the memoized function. By default, the
+ * first argument provided to the memoized function is used as the cache key.
+ * The `func` is executed with the `this` binding of the memoized function.
+ * The result cache is exposed as the `cache` property on the memoized function.
*
* @static
* @memberOf _
- * @category Util
- * @param {Array} pairs The predicate-function pairs.
- * @returns {Function} Returns the new function.
+ * @category Functions
+ * @param {Function} func The function to have its output memoized.
+ * @param {Function} [resolver] A function used to resolve the cache key.
+ * @returns {Function} Returns the new memoizing function.
* @example
*
- * var func = _.cond([
- * [_.matches({ 'a': 1 }), _.constant('matches A')],
- * [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
- * [_.constant(true), _.constant('no match')]
- * ]);
+ * var fibonacci = _.memoize(function(n) {
+ * return n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2);
+ * });
+ *
+ * fibonacci(9)
+ * // => 34
*
- * func({ 'a': 1, 'b': 2 });
- * // => 'matches A'
+ * var data = {
+ * 'fred': { 'name': 'fred', 'age': 40 },
+ * 'pebbles': { 'name': 'pebbles', 'age': 1 }
+ * };
*
- * func({ 'a': 0, 'b': 1 });
- * // => 'matches B'
+ * // modifying the result cache
+ * var get = _.memoize(function(name) { return data[name]; }, _.identity);
+ * get('pebbles');
+ * // => { 'name': 'pebbles', 'age': 1 }
*
- * func({ 'a': '1', 'b': '2' });
- * // => 'no match'
+ * get.cache.pebbles.name = 'penelope';
+ * get('pebbles');
+ * // => { 'name': 'penelope', 'age': 1 }
*/
- function cond(pairs) {
- var length = pairs ? pairs.length : 0,
- toIteratee = getIteratee();
-
- pairs = !length ? [] : arrayMap(pairs, function(pair) {
- if (typeof pair[1] != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- return [toIteratee(pair[0]), pair[1]];
- });
+ function memoize(func, resolver) {
+ if (!isFunction(func)) {
+ throw new TypeError;
+ }
+ var memoized = function() {
+ var cache = memoized.cache,
+ key = resolver ? resolver.apply(this, arguments) : keyPrefix + arguments[0];
- return rest(function(args) {
- var index = -1;
- while (++index < length) {
- var pair = pairs[index];
- if (apply(pair[0], this, args)) {
- return apply(pair[1], this, args);
- }
- }
- });
+ return hasOwnProperty.call(cache, key)
+ ? cache[key]
+ : (cache[key] = func.apply(this, arguments));
+ }
+ memoized.cache = {};
+ return memoized;
}
/**
- * Creates a function that invokes the predicate properties of `source` with
- * the corresponding property values of a given object, returning `true` if
- * all predicates return truthy, else `false`.
+ * Creates a function that is restricted to execute `func` once. Repeat calls to
+ * the function will return the value of the first call. The `func` is executed
+ * with the `this` binding of the created function.
*
* @static
* @memberOf _
- * @category Util
- * @param {Object} source The object of property predicates to conform to.
- * @returns {Function} Returns the new function.
+ * @category Functions
+ * @param {Function} func The function to restrict.
+ * @returns {Function} Returns the new restricted function.
* @example
*
- * var users = [
- * { 'user': 'barney', 'age': 36 },
- * { 'user': 'fred', 'age': 40 }
- * ];
- *
- * _.filter(users, _.conforms({ 'age': _.partial(_.gt, _, 38) }));
- * // => [{ 'user': 'fred', 'age': 40 }]
+ * var initialize = _.once(createApplication);
+ * initialize();
+ * initialize();
+ * // `initialize` executes `createApplication` once
*/
- function conforms(source) {
- return baseConforms(baseClone(source, true));
- }
+ function once(func) {
+ var ran,
+ result;
- /**
- * Creates a function that returns `value`.
- *
- * @static
- * @memberOf _
- * @category Util
- * @param {*} value The value to return from the new function.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var object = { 'user': 'fred' };
- * var getter = _.constant(object);
- *
- * getter() === object;
- * // => true
- */
- function constant(value) {
+ if (!isFunction(func)) {
+ throw new TypeError;
+ }
return function() {
- return value;
+ if (ran) {
+ return result;
+ }
+ ran = true;
+ result = func.apply(this, arguments);
+
+ // clear the `func` variable so the function may be garbage collected
+ func = null;
+ return result;
};
}
/**
- * Creates a function that returns the result of invoking the given functions
- * with the `this` binding of the created function, where each successive
- * invocation is supplied the return value of the previous.
+ * Creates a function that, when called, invokes `func` with any additional
+ * `partial` arguments prepended to those provided to the new function. This
+ * method is similar to `_.bind` except it does **not** alter the `this` binding.
*
* @static
* @memberOf _
- * @category Util
- * @param {...(Function|Function[])} [funcs] Functions to invoke.
- * @returns {Function} Returns the new function.
+ * @category Functions
+ * @param {Function} func The function to partially apply arguments to.
+ * @param {...*} [arg] Arguments to be partially applied.
+ * @returns {Function} Returns the new partially applied function.
* @example
*
- * function square(n) {
- * return n * n;
- * }
- *
- * var addSquare = _.flow(_.add, square);
- * addSquare(1, 2);
- * // => 9
+ * var greet = function(greeting, name) { return greeting + ' ' + name; };
+ * var hi = _.partial(greet, 'hi');
+ * hi('fred');
+ * // => 'hi fred'
*/
- var flow = createFlow();
+ function partial(func) {
+ return createWrapper(func, 16, slice(arguments, 1));
+ }
/**
- * This method is like `_.flow` except that it creates a function that
- * invokes the given functions from right to left.
+ * This method is like `_.partial` except that `partial` arguments are
+ * appended to those provided to the new function.
*
* @static
* @memberOf _
- * @category Util
- * @param {...(Function|Function[])} [funcs] Functions to invoke.
- * @returns {Function} Returns the new function.
+ * @category Functions
+ * @param {Function} func The function to partially apply arguments to.
+ * @param {...*} [arg] Arguments to be partially applied.
+ * @returns {Function} Returns the new partially applied function.
* @example
*
- * function square(n) {
- * return n * n;
- * }
+ * var defaultsDeep = _.partialRight(_.merge, _.defaults);
*
- * var addSquare = _.flowRight(square, _.add);
- * addSquare(1, 2);
- * // => 9
- */
- var flowRight = createFlow(true);
-
- /**
- * This method returns the first argument given to it.
+ * var options = {
+ * 'variable': 'data',
+ * 'imports': { 'jq': $ }
+ * };
*
- * @static
- * @memberOf _
- * @category Util
- * @param {*} value Any value.
- * @returns {*} Returns `value`.
- * @example
+ * defaultsDeep(options, _.templateSettings);
*
- * var object = { 'user': 'fred' };
+ * options.variable
+ * // => 'data'
*
- * _.identity(object) === object;
- * // => true
+ * options.imports
+ * // => { '_': _, 'jq': $ }
*/
- function identity(value) {
- return value;
+ function partialRight(func) {
+ return createWrapper(func, 32, null, slice(arguments, 1));
}
/**
- * Creates a function that invokes `func` with the arguments of the created
- * function. If `func` is a property name the created callback returns the
- * property value for a given element. If `func` is an object the created
- * callback returns `true` for elements that contain the equivalent object
- * properties, otherwise it returns `false`.
+ * Creates a function that, when executed, will only call the `func` function
+ * at most once per every `wait` milliseconds. Provide an options object to
+ * indicate that `func` should be invoked on the leading and/or trailing edge
+ * of the `wait` timeout. Subsequent calls to the throttled function will
+ * return the result of the last `func` call.
+ *
+ * Note: If `leading` and `trailing` options are `true` `func` will be called
+ * on the trailing edge of the timeout only if the the throttled function is
+ * invoked more than once during the `wait` timeout.
*
* @static
* @memberOf _
- * @category Util
- * @param {*} [func=_.identity] The value to convert to a callback.
- * @returns {Function} Returns the callback.
+ * @category Functions
+ * @param {Function} func The function to throttle.
+ * @param {number} wait The number of milliseconds to throttle executions to.
+ * @param {Object} [options] The options object.
+ * @param {boolean} [options.leading=true] Specify execution on the leading edge of the timeout.
+ * @param {boolean} [options.trailing=true] Specify execution on the trailing edge of the timeout.
+ * @returns {Function} Returns the new throttled function.
* @example
*
- * var users = [
- * { 'user': 'barney', 'age': 36 },
- * { 'user': 'fred', 'age': 40 }
- * ];
- *
- * // Create custom iteratee shorthands.
- * _.iteratee = _.wrap(_.iteratee, function(callback, func) {
- * var p = /^(\S+)\s*([<>])\s*(\S+)$/.exec(func);
- * return !p ? callback(func) : function(object) {
- * return (p[2] == '>' ? object[p[1]] > p[3] : object[p[1]] < p[3]);
- * };
- * });
+ * // avoid excessively updating the position while scrolling
+ * var throttled = _.throttle(updatePosition, 100);
+ * jQuery(window).on('scroll', throttled);
*
- * _.filter(users, 'age > 36');
- * // => [{ 'user': 'fred', 'age': 40 }]
+ * // execute `renewToken` when the click event is fired, but not more than once every 5 minutes
+ * jQuery('.interactive').on('click', _.throttle(renewToken, 300000, {
+ * 'trailing': false
+ * }));
*/
- function iteratee(func) {
- return baseIteratee(typeof func == 'function' ? func : baseClone(func, true));
+ function throttle(func, wait, options) {
+ var leading = true,
+ trailing = true;
+
+ if (!isFunction(func)) {
+ throw new TypeError;
+ }
+ if (options === false) {
+ leading = false;
+ } else if (isObject(options)) {
+ leading = 'leading' in options ? options.leading : leading;
+ trailing = 'trailing' in options ? options.trailing : trailing;
+ }
+ debounceOptions.leading = leading;
+ debounceOptions.maxWait = wait;
+ debounceOptions.trailing = trailing;
+
+ return debounce(func, wait, debounceOptions);
}
/**
- * Creates a function that performs a partial deep comparison between a given
- * object and `source`, returning `true` if the given object has equivalent
- * property values, else `false`. The created function is equivalent to
- * `_.isMatch` with a `source` partially applied.
- *
- * **Note:** This method supports comparing the same values as `_.isEqual`.
+ * Creates a function that provides `value` to the wrapper function as its
+ * first argument. Additional arguments provided to the function are appended
+ * to those provided to the wrapper function. The wrapper is executed with
+ * the `this` binding of the created function.
*
* @static
* @memberOf _
- * @category Util
- * @param {Object} source The object of property values to match.
+ * @category Functions
+ * @param {*} value The value to wrap.
+ * @param {Function} wrapper The wrapper function.
* @returns {Function} Returns the new function.
* @example
*
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': true },
- * { 'user': 'fred', 'age': 40, 'active': false }
- * ];
+ * var p = _.wrap(_.escape, function(func, text) {
+ * return '<p>' + func(text) + '</p>';
+ * });
*
- * _.filter(users, _.matches({ 'age': 40, 'active': false }));
- * // => [{ 'user': 'fred', 'age': 40, 'active': false }]
+ * p('Fred, Wilma, & Pebbles');
+ * // => '<p>Fred, Wilma, & Pebbles</p>'
*/
- function matches(source) {
- return baseMatches(baseClone(source, true));
+ function wrap(value, wrapper) {
+ return createWrapper(wrapper, 16, [value]);
}
+ /*--------------------------------------------------------------------------*/
+
/**
- * Creates a function that performs a partial deep comparison between the
- * value at `path` of a given object to `srcValue`, returning `true` if the
- * object value is equivalent, else `false`.
- *
- * **Note:** This method supports comparing the same values as `_.isEqual`.
+ * Creates a function that returns `value`.
*
* @static
* @memberOf _
- * @category Util
- * @param {Array|string} path The path of the property to get.
- * @param {*} srcValue The value to match.
+ * @category Utilities
+ * @param {*} value The value to return from the new function.
* @returns {Function} Returns the new function.
* @example
*
- * var users = [
- * { 'user': 'barney' },
- * { 'user': 'fred' }
- * ];
- *
- * _.find(users, _.matchesProperty('user', 'fred'));
- * // => { 'user': 'fred' }
+ * var object = { 'name': 'fred' };
+ * var getter = _.constant(object);
+ * getter() === object;
+ * // => true
*/
- function matchesProperty(path, srcValue) {
- return baseMatchesProperty(path, baseClone(srcValue, true));
+ function constant(value) {
+ return function() {
+ return value;
+ };
}
/**
- * Creates a function that invokes the method at `path` of a given object.
- * Any additional arguments are provided to the invoked method.
+ * Produces a callback bound to an optional `thisArg`. If `func` is a property
+ * name the created callback will return the property value for a given element.
+ * If `func` is an object the created callback will return `true` for elements
+ * that contain the equivalent object properties, otherwise it will return `false`.
*
* @static
* @memberOf _
- * @category Util
- * @param {Array|string} path The path of the method to invoke.
- * @param {...*} [args] The arguments to invoke the method with.
- * @returns {Function} Returns the new function.
+ * @category Utilities
+ * @param {*} [func=identity] The value to convert to a callback.
+ * @param {*} [thisArg] The `this` binding of the created callback.
+ * @param {number} [argCount] The number of arguments the callback accepts.
+ * @returns {Function} Returns a callback function.
* @example
*
- * var objects = [
- * { 'a': { 'b': { 'c': _.constant(2) } } },
- * { 'a': { 'b': { 'c': _.constant(1) } } }
+ * var characters = [
+ * { 'name': 'barney', 'age': 36 },
+ * { 'name': 'fred', 'age': 40 }
* ];
*
- * _.map(objects, _.method('a.b.c'));
- * // => [2, 1]
+ * // wrap to create custom callback shorthands
+ * _.createCallback = _.wrap(_.createCallback, function(func, callback, thisArg) {
+ * var match = /^(.+?)__([gl]t)(.+)$/.exec(callback);
+ * return !match ? func(callback, thisArg) : function(object) {
+ * return match[2] == 'gt' ? object[match[1]] > match[3] : object[match[1]] < match[3];
+ * };
+ * });
*
- * _.invokeMap(_.sortBy(objects, _.method(['a', 'b', 'c'])), 'a.b.c');
- * // => [1, 2]
+ * _.filter(characters, 'age__gt38');
+ * // => [{ 'name': 'fred', 'age': 40 }]
*/
- var method = rest(function(path, args) {
+ function createCallback(func, thisArg, argCount) {
+ var type = typeof func;
+ if (func == null || type == 'function') {
+ return baseCreateCallback(func, thisArg, argCount);
+ }
+ // handle "_.pluck" style callback shorthands
+ if (type != 'object') {
+ return property(func);
+ }
+ var props = keys(func),
+ key = props[0],
+ a = func[key];
+
+ // handle "_.where" style callback shorthands
+ if (props.length == 1 && a === a && !isObject(a)) {
+ // fast path the common case of providing an object with a single
+ // property containing a primitive value
+ return function(object) {
+ var b = object[key];
+ return a === b && (a !== 0 || (1 / a == 1 / b));
+ };
+ }
return function(object) {
- return baseInvoke(object, path, args);
+ var length = props.length,
+ result = false;
+
+ while (length--) {
+ if (!(result = baseIsEqual(object[props[length]], func[props[length]], null, true))) {
+ break;
+ }
+ }
+ return result;
};
- });
+ }
/**
- * The opposite of `_.method`; this method creates a function that invokes
- * the method at a given path of `object`. Any additional arguments are
- * provided to the invoked method.
+ * Converts the characters `&`, `<`, `>`, `"`, and `'` in `string` to their
+ * corresponding HTML entities.
*
* @static
* @memberOf _
- * @category Util
- * @param {Object} object The object to query.
- * @param {...*} [args] The arguments to invoke the method with.
- * @returns {Function} Returns the new function.
+ * @category Utilities
+ * @param {string} string The string to escape.
+ * @returns {string} Returns the escaped string.
* @example
*
- * var array = _.times(3, _.constant),
- * object = { 'a': array, 'b': array, 'c': array };
+ * _.escape('Fred, Wilma, & Pebbles');
+ * // => 'Fred, Wilma, & Pebbles'
+ */
+ function escape(string) {
+ return string == null ? '' : String(string).replace(reUnescapedHtml, escapeHtmlChar);
+ }
+
+ /**
+ * This method returns the first argument provided to it.
*
- * _.map(['a[2]', 'c[0]'], _.methodOf(object));
- * // => [2, 0]
+ * @static
+ * @memberOf _
+ * @category Utilities
+ * @param {*} value Any value.
+ * @returns {*} Returns `value`.
+ * @example
*
- * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
- * // => [2, 0]
+ * var object = { 'name': 'fred' };
+ * _.identity(object) === object;
+ * // => true
*/
- var methodOf = rest(function(object, args) {
- return function(path) {
- return baseInvoke(object, path, args);
- };
- });
+ function identity(value) {
+ return value;
+ }
/**
- * Adds all own enumerable function properties of a source object to the
- * destination object. If `object` is a function then methods are added to
- * its prototype as well.
- *
- * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
- * avoid conflicts caused by modifying the original.
+ * Adds function properties of a source object to the destination object.
+ * If `object` is a function methods will be added to its prototype as well.
*
* @static
* @memberOf _
- * @category Util
- * @param {Function|Object} [object=lodash] The destination object.
+ * @category Utilities
+ * @param {Function|Object} [object=lodash] object The destination object.
* @param {Object} source The object of functions to add.
* @param {Object} [options] The options object.
- * @param {boolean} [options.chain=true] Specify whether the functions added
- * are chainable.
- * @returns {Function|Object} Returns `object`.
+ * @param {boolean} [options.chain=true] Specify whether the functions added are chainable.
* @example
*
- * function vowels(string) {
- * return _.filter(string, function(v) {
- * return /[aeiou]/i.test(v);
- * });
+ * function capitalize(string) {
+ * return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase();
* }
*
- * _.mixin({ 'vowels': vowels });
- * _.vowels('fred');
- * // => ['e']
+ * _.mixin({ 'capitalize': capitalize });
+ * _.capitalize('fred');
+ * // => 'Fred'
*
- * _('fred').vowels().value();
- * // => ['e']
+ * _('fred').capitalize().value();
+ * // => 'Fred'
*
- * _.mixin({ 'vowels': vowels }, { 'chain': false });
- * _('fred').vowels();
- * // => ['e']
+ * _.mixin({ 'capitalize': capitalize }, { 'chain': false });
+ * _('fred').capitalize();
+ * // => 'Fred'
*/
function mixin(object, source, options) {
- var props = keys(source),
- methodNames = baseFunctions(source, props);
+ var chain = true,
+ methodNames = source && functions(source);
- if (options == null &&
- !(isObject(source) && (methodNames.length || !props.length))) {
- options = source;
+ if (!source || (!options && !methodNames.length)) {
+ if (options == null) {
+ options = source;
+ }
+ ctor = lodashWrapper;
source = object;
- object = this;
- methodNames = baseFunctions(source, keys(source));
+ object = lodash;
+ methodNames = functions(source);
+ }
+ if (options === false) {
+ chain = false;
+ } else if (isObject(options) && 'chain' in options) {
+ chain = options.chain;
}
- var chain = (isObject(options) && 'chain' in options) ? options.chain : true,
- isFunc = isFunction(object);
+ var ctor = object,
+ isFunc = isFunction(ctor);
- arrayEach(methodNames, function(methodName) {
- var func = source[methodName];
- object[methodName] = func;
+ forEach(methodNames, function(methodName) {
+ var func = object[methodName] = source[methodName];
if (isFunc) {
- object.prototype[methodName] = function() {
- var chainAll = this.__chain__;
- if (chain || chainAll) {
- var result = object(this.__wrapped__),
- actions = result.__actions__ = copyArray(this.__actions__);
+ ctor.prototype[methodName] = function() {
+ var chainAll = this.__chain__,
+ value = this.__wrapped__,
+ args = [value];
- actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
+ push.apply(args, arguments);
+ var result = func.apply(object, args);
+ if (chain || chainAll) {
+ if (value === result && isObject(result)) {
+ return this;
+ }
+ result = new ctor(result);
result.__chain__ = chainAll;
- return result;
}
- return func.apply(object, arrayPush([this.value()], arguments));
+ return result;
};
}
});
-
- return object;
}
/**
- * Reverts the `_` variable to its previous value and returns a reference to
+ * Reverts the '_' variable to its previous value and returns a reference to
* the `lodash` function.
*
* @static
* @memberOf _
- * @category Util
+ * @category Utilities
* @returns {Function} Returns the `lodash` function.
* @example
*
* var lodash = _.noConflict();
*/
function noConflict() {
- if (root._ === this) {
- root._ = oldDash;
- }
+ context._ = oldDash;
return this;
}
/**
- * A no-operation function that returns `undefined` regardless of the
- * arguments it receives.
+ * A no-operation function.
*
* @static
* @memberOf _
- * @category Util
+ * @category Utilities
* @example
*
- * var object = { 'user': 'fred' };
- *
+ * var object = { 'name': 'fred' };
* _.noop(object) === undefined;
* // => true
*/
function noop() {
- // No operation performed.
+ // no operation performed
}
/**
- * Creates a function that returns its nth argument.
+ * Gets the number of milliseconds that have elapsed since the Unix epoch
+ * (1 January 1970 00:00:00 UTC).
*
* @static
* @memberOf _
- * @category Util
- * @param {number} [n=0] The index of the argument to return.
- * @returns {Function} Returns the new function.
+ * @category Utilities
* @example
*
- * var func = _.nthArg(1);
- *
- * func('a', 'b', 'c');
- * // => 'b'
+ * var stamp = _.now();
+ * _.defer(function() { console.log(_.now() - stamp); });
+ * // => logs the number of milliseconds it took for the deferred function to be called
*/
- function nthArg(n) {
- n = toInteger(n);
- return function() {
- return arguments[n];
- };
- }
+ var now = isNative(now = Date.now) && now || function() {
+ return new Date().getTime();
+ };
/**
- * Creates a function that invokes `iteratees` with the arguments provided
- * to the created function and returns their results.
+ * Converts the given value into an integer of the specified radix.
+ * If `radix` is `undefined` or `0` a `radix` of `10` is used unless the
+ * `value` is a hexadecimal, in which case a `radix` of `16` is used.
+ *
+ * Note: This method avoids differences in native ES3 and ES5 `parseInt`
+ * implementations. See http://es5.github.io/#E.
*
* @static
* @memberOf _
- * @category Util
- * @param {...(Function|Function[])} iteratees The iteratees to invoke.
- * @returns {Function} Returns the new function.
+ * @category Utilities
+ * @param {string} value The value to parse.
+ * @param {number} [radix] The radix used to interpret the value to parse.
+ * @returns {number} Returns the new integer value.
* @example
*
- * var func = _.over(Math.max, Math.min);
- *
- * func(1, 2, 3, 4);
- * // => [4, 1]
+ * _.parseInt('08');
+ * // => 8
*/
- var over = createOver(arrayMap);
+ var parseInt = nativeParseInt(whitespace + '08') == 8 ? nativeParseInt : function(value, radix) {
+ // Firefox < 21 and Opera < 15 follow the ES3 specified implementation of `parseInt`
+ return nativeParseInt(isString(value) ? value.replace(reLeadingSpacesAndZeros, '') : value, radix || 0);
+ };
/**
- * Creates a function that checks if **all** of the `predicates` return
- * truthy when invoked with the arguments provided to the created function.
+ * Creates a "_.pluck" style function, which returns the `key` value of a
+ * given object.
*
* @static
* @memberOf _
- * @category Util
- * @param {...(Function|Function[])} predicates The predicates to check.
+ * @category Utilities
+ * @param {string} key The name of the property to retrieve.
* @returns {Function} Returns the new function.
* @example
*
- * var func = _.overEvery(Boolean, isFinite);
+ * var characters = [
+ * { 'name': 'fred', 'age': 40 },
+ * { 'name': 'barney', 'age': 36 }
+ * ];
*
- * func('1');
- * // => true
+ * var getName = _.property('name');
*
- * func(null);
- * // => false
+ * _.map(characters, getName);
+ * // => ['barney', 'fred']
*
- * func(NaN);
- * // => false
+ * _.sortBy(characters, getName);
+ * // => [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred', 'age': 40 }]
*/
- var overEvery = createOver(arrayEvery);
+ function property(key) {
+ return function(object) {
+ return object[key];
+ };
+ }
/**
- * Creates a function that checks if **any** of the `predicates` return
- * truthy when invoked with the arguments provided to the created function.
+ * Produces a random number between `min` and `max` (inclusive). If only one
+ * argument is provided a number between `0` and the given number will be
+ * returned. If `floating` is truey or either `min` or `max` are floats a
+ * floating-point number will be returned instead of an integer.
*
* @static
* @memberOf _
- * @category Util
- * @param {...(Function|Function[])} predicates The predicates to check.
- * @returns {Function} Returns the new function.
+ * @category Utilities
+ * @param {number} [min=0] The minimum possible value.
+ * @param {number} [max=1] The maximum possible value.
+ * @param {boolean} [floating=false] Specify returning a floating-point number.
+ * @returns {number} Returns a random number.
* @example
*
- * var func = _.overSome(Boolean, isFinite);
+ * _.random(0, 5);
+ * // => an integer between 0 and 5
*
- * func('1');
- * // => true
+ * _.random(5);
+ * // => also an integer between 0 and 5
*
- * func(null);
- * // => true
+ * _.random(5, true);
+ * // => a floating-point number between 0 and 5
*
- * func(NaN);
- * // => false
+ * _.random(1.2, 5.2);
+ * // => a floating-point number between 1.2 and 5.2
*/
- var overSome = createOver(arraySome);
+ function random(min, max, floating) {
+ var noMin = min == null,
+ noMax = max == null;
- /**
- * Creates a function that returns the value at `path` of a given object.
- *
- * @static
- * @memberOf _
- * @category Util
- * @param {Array|string} path The path of the property to get.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var objects = [
- * { 'a': { 'b': { 'c': 2 } } },
- * { 'a': { 'b': { 'c': 1 } } }
- * ];
- *
- * _.map(objects, _.property('a.b.c'));
- * // => [2, 1]
- *
- * _.map(_.sortBy(objects, _.property(['a', 'b', 'c'])), 'a.b.c');
- * // => [1, 2]
- */
- function property(path) {
- return isKey(path) ? baseProperty(path) : basePropertyDeep(path);
+ if (floating == null) {
+ if (typeof min == 'boolean' && noMax) {
+ floating = min;
+ min = 1;
+ }
+ else if (!noMax && typeof max == 'boolean') {
+ floating = max;
+ noMax = true;
+ }
+ }
+ if (noMin && noMax) {
+ max = 1;
+ }
+ min = +min || 0;
+ if (noMax) {
+ max = min;
+ min = 0;
+ } else {
+ max = +max || 0;
+ }
+ if (floating || min % 1 || max % 1) {
+ var rand = nativeRandom();
+ return nativeMin(min + (rand * (max - min + parseFloat('1e-' + ((rand +'').length - 1)))), max);
+ }
+ return baseRandom(min, max);
}
/**
- * The opposite of `_.property`; this method creates a function that returns
- * the value at a given path of `object`.
+ * Resolves the value of property `key` on `object`. If `key` is a function
+ * it will be invoked with the `this` binding of `object` and its result returned,
+ * else the property value is returned. If `object` is falsey then `undefined`
+ * is returned.
*
* @static
* @memberOf _
- * @category Util
- * @param {Object} object The object to query.
- * @returns {Function} Returns the new function.
+ * @category Utilities
+ * @param {Object} object The object to inspect.
+ * @param {string} key The name of the property to resolve.
+ * @returns {*} Returns the resolved value.
* @example
*
- * var array = [0, 1, 2],
- * object = { 'a': array, 'b': array, 'c': array };
+ * var object = {
+ * 'cheese': 'crumpets',
+ * 'stuff': function() {
+ * return 'nonsense';
+ * }
+ * };
*
- * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
- * // => [2, 0]
+ * _.result(object, 'cheese');
+ * // => 'crumpets'
*
- * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
- * // => [2, 0]
+ * _.result(object, 'stuff');
+ * // => 'nonsense'
*/
- function propertyOf(object) {
- return function(path) {
- return object == null ? undefined : baseGet(object, path);
- };
+ function result(object, key) {
+ if (object) {
+ var value = object[key];
+ return isFunction(value) ? object[key]() : value;
+ }
}
/**
- * Creates an array of numbers (positive and/or negative) progressing from
- * `start` up to, but not including, `end`. A step of `-1` is used if a negative
- * `start` is specified without an `end` or `step`. If `end` is not specified
- * it's set to `start` with `start` then set to `0`.
+ * A micro-templating method that handles arbitrary delimiters, preserves
+ * whitespace, and correctly escapes quotes within interpolated code.
+ *
+ * Note: In the development build, `_.template` utilizes sourceURLs for easier
+ * debugging. See http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
+ *
+ * For more information on precompiling templates see:
+ * http://lodash.com/custom-builds
*
- * **Note:** JavaScript follows the IEEE-754 standard for resolving
- * floating-point values which can produce unexpected results.
+ * For more information on Chrome extension sandboxes see:
+ * http://developer.chrome.com/stable/extensions/sandboxingEval.html
*
* @static
* @memberOf _
- * @category Util
- * @param {number} [start=0] The start of the range.
- * @param {number} end The end of the range.
- * @param {number} [step=1] The value to increment or decrement by.
- * @returns {Array} Returns the new array of numbers.
+ * @category Utilities
+ * @param {string} text The template text.
+ * @param {Object} data The data object used to populate the text.
+ * @param {Object} [options] The options object.
+ * @param {RegExp} [options.escape] The "escape" delimiter.
+ * @param {RegExp} [options.evaluate] The "evaluate" delimiter.
+ * @param {Object} [options.imports] An object to import into the template as local variables.
+ * @param {RegExp} [options.interpolate] The "interpolate" delimiter.
+ * @param {string} [sourceURL] The sourceURL of the template's compiled source.
+ * @param {string} [variable] The data object variable name.
+ * @returns {Function|string} Returns a compiled function when no `data` object
+ * is given, else it returns the interpolated text.
* @example
*
- * _.range(4);
- * // => [0, 1, 2, 3]
- *
- * _.range(-4);
- * // => [0, -1, -2, -3]
- *
- * _.range(1, 5);
- * // => [1, 2, 3, 4]
- *
- * _.range(0, 20, 5);
- * // => [0, 5, 10, 15]
- *
- * _.range(0, -4, -1);
- * // => [0, -1, -2, -3]
+ * // using the "interpolate" delimiter to create a compiled template
+ * var compiled = _.template('hello <%= name %>');
+ * compiled({ 'name': 'fred' });
+ * // => 'hello fred'
*
- * _.range(1, 4, 0);
- * // => [1, 1, 1]
+ * // using the "escape" delimiter to escape HTML in data property values
+ * _.template('<b><%- value %></b>', { 'value': '<script>' });
+ * // => '<b><script></b>'
*
- * _.range(0);
- * // => []
- */
- var range = createRange();
-
- /**
- * This method is like `_.range` except that it populates values in
- * descending order.
+ * // using the "evaluate" delimiter to generate HTML
+ * var list = '<% _.forEach(people, function(name) { %><li><%- name %></li><% }); %>';
+ * _.template(list, { 'people': ['fred', 'barney'] });
+ * // => '<li>fred</li><li>barney</li>'
*
- * @static
- * @memberOf _
- * @category Util
- * @param {number} [start=0] The start of the range.
- * @param {number} end The end of the range.
- * @param {number} [step=1] The value to increment or decrement by.
- * @returns {Array} Returns the new array of numbers.
- * @example
+ * // using the ES6 delimiter as an alternative to the default "interpolate" delimiter
+ * _.template('hello ${ name }', { 'name': 'pebbles' });
+ * // => 'hello pebbles'
*
- * _.rangeRight(4);
- * // => [3, 2, 1, 0]
+ * // using the internal `print` function in "evaluate" delimiters
+ * _.template('<% print("hello " + name); %>!', { 'name': 'barney' });
+ * // => 'hello barney!'
*
- * _.rangeRight(-4);
- * // => [-3, -2, -1, 0]
+ * // using a custom template delimiters
+ * _.templateSettings = {
+ * 'interpolate': /{{([\s\S]+?)}}/g
+ * };
*
- * _.rangeRight(1, 5);
- * // => [4, 3, 2, 1]
+ * _.template('hello {{ name }}!', { 'name': 'mustache' });
+ * // => 'hello mustache!'
*
- * _.rangeRight(0, 20, 5);
- * // => [15, 10, 5, 0]
+ * // using the `imports` option to import jQuery
+ * var list = '<% jq.each(people, function(name) { %><li><%- name %></li><% }); %>';
+ * _.template(list, { 'people': ['fred', 'barney'] }, { 'imports': { 'jq': jQuery } });
+ * // => '<li>fred</li><li>barney</li>'
*
- * _.rangeRight(0, -4, -1);
- * // => [-3, -2, -1, 0]
+ * // using the `sourceURL` option to specify a custom sourceURL for the template
+ * var compiled = _.template('hello <%= name %>', null, { 'sourceURL': '/basic/greeting.jst' });
+ * compiled(data);
+ * // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector
*
- * _.rangeRight(1, 4, 0);
- * // => [1, 1, 1]
+ * // using the `variable` option to ensure a with-statement isn't used in the compiled template
+ * var compiled = _.template('hi <%= data.name %>!', null, { 'variable': 'data' });
+ * compiled.source;
+ * // => function(data) {
+ * var __t, __p = '', __e = _.escape;
+ * __p += 'hi ' + ((__t = ( data.name )) == null ? '' : __t) + '!';
+ * return __p;
+ * }
*
- * _.rangeRight(0);
- * // => []
+ * // using the `source` property to inline compiled templates for meaningful
+ * // line numbers in error messages and a stack trace
+ * fs.writeFileSync(path.join(cwd, 'jst.js'), '\
+ * var JST = {\
+ * "main": ' + _.template(mainText).source + '\
+ * };\
+ * ');
*/
- var rangeRight = createRange(true);
+ function template(text, data, options) {
+ // based on John Resig's `tmpl` implementation
+ // http://ejohn.org/blog/javascript-micro-templating/
+ // and Laura Doktorova's doT.js
+ // https://github.com/olado/doT
+ var settings = lodash.templateSettings;
+ text = String(text || '');
+
+ // avoid missing dependencies when `iteratorTemplate` is not defined
+ options = iteratorTemplate ? defaults({}, options, settings) : settings;
+
+ var imports = iteratorTemplate && defaults({}, options.imports, settings.imports),
+ importsKeys = iteratorTemplate ? keys(imports) : ['_'],
+ importsValues = iteratorTemplate ? values(imports) : [lodash];
+
+ var isEvaluating,
+ index = 0,
+ interpolate = options.interpolate || reNoMatch,
+ source = "__p += '";
+
+ // compile the regexp to match each delimiter
+ var reDelimiters = RegExp(
+ (options.escape || reNoMatch).source + '|' +
+ interpolate.source + '|' +
+ (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
+ (options.evaluate || reNoMatch).source + '|$'
+ , 'g');
+
+ text.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
+ interpolateValue || (interpolateValue = esTemplateValue);
+
+ // escape characters that cannot be included in string literals
+ source += text.slice(index, offset).replace(reUnescapedString, escapeStringChar);
+
+ // replace delimiters with snippets
+ if (escapeValue) {
+ source += "' +\n__e(" + escapeValue + ") +\n'";
+ }
+ if (evaluateValue) {
+ isEvaluating = true;
+ source += "';\n" + evaluateValue + ";\n__p += '";
+ }
+ if (interpolateValue) {
+ source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
+ }
+ index = offset + match.length;
+
+ // the JS engine embedded in Adobe products requires returning the `match`
+ // string in order to produce the correct `offset` value
+ return match;
+ });
+
+ source += "';\n";
+
+ // if `variable` is not specified, wrap a with-statement around the generated
+ // code to add the data object to the top of the scope chain
+ var variable = options.variable,
+ hasVariable = variable;
+
+ if (!hasVariable) {
+ variable = 'obj';
+ source = 'with (' + variable + ') {\n' + source + '\n}\n';
+ }
+ // cleanup code by stripping empty strings
+ source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
+ .replace(reEmptyStringMiddle, '$1')
+ .replace(reEmptyStringTrailing, '$1;');
+
+ // frame code as the function body
+ source = 'function(' + variable + ') {\n' +
+ (hasVariable ? '' : variable + ' || (' + variable + ' = {});\n') +
+ "var __t, __p = '', __e = _.escape" +
+ (isEvaluating
+ ? ', __j = Array.prototype.join;\n' +
+ "function print() { __p += __j.call(arguments, '') }\n"
+ : ';\n'
+ ) +
+ source +
+ 'return __p\n}';
+
+ // Use a sourceURL for easier debugging.
+ // http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl
+ var sourceURL = '\n/*\n//# sourceURL=' + (options.sourceURL || '/lodash/template/source[' + (templateCounter++) + ']') + '\n*/';
+
+ try {
+ var result = Function(importsKeys, 'return ' + source + sourceURL).apply(undefined, importsValues);
+ } catch(e) {
+ e.source = source;
+ throw e;
+ }
+ if (data) {
+ return result(data);
+ }
+ // provide the compiled function's source by its `toString` method, in
+ // supported environments, or the `source` property as a convenience for
+ // inlining compiled templates during the build process
+ result.source = source;
+ return result;
+ }
/**
- * Invokes the iteratee `n` times, returning an array of the results of
- * each invocation. The iteratee is invoked with one argument; (index).
+ * Executes the callback `n` times, returning an array of the results
+ * of each callback execution. The callback is bound to `thisArg` and invoked
+ * with one argument; (index).
*
* @static
* @memberOf _
- * @category Util
- * @param {number} n The number of times to invoke `iteratee`.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the array of results.
+ * @category Utilities
+ * @param {number} n The number of times to execute the callback.
+ * @param {Function} callback The function called per iteration.
+ * @param {*} [thisArg] The `this` binding of `callback`.
+ * @returns {Array} Returns an array of the results of each `callback` execution.
* @example
*
- * _.times(3, String);
- * // => ['0', '1', '2']
+ * var diceRolls = _.times(3, _.partial(_.random, 1, 6));
+ * // => [3, 6, 4]
+ *
+ * _.times(3, function(n) { mage.castSpell(n); });
+ * // => calls `mage.castSpell(n)` three times, passing `n` of `0`, `1`, and `2` respectively
*
- * _.times(4, _.constant(true));
- * // => [true, true, true, true]
+ * _.times(3, function(n) { this.cast(n); }, mage);
+ * // => also calls `mage.castSpell(n)` three times
*/
- function times(n, iteratee) {
- n = toInteger(n);
- if (n < 1 || n > MAX_SAFE_INTEGER) {
- return [];
- }
- var index = MAX_ARRAY_LENGTH,
- length = nativeMin(n, MAX_ARRAY_LENGTH);
-
- iteratee = baseCastFunction(iteratee);
- n -= MAX_ARRAY_LENGTH;
+ function times(n, callback, thisArg) {
+ n = (n = +n) > -1 ? n : 0;
+ var index = -1,
+ result = Array(n);
- var result = baseTimes(length, iteratee);
+ callback = baseCreateCallback(callback, thisArg, 1);
while (++index < n) {
- iteratee(index);
+ result[index] = callback(index);
}
return result;
}
/**
- * Converts `value` to a property path array.
+ * The inverse of `_.escape` this method converts the HTML entities
+ * `&`, `<`, `>`, `"`, and `'` in `string` to their
+ * corresponding characters.
*
* @static
* @memberOf _
- * @category Util
- * @param {*} value The value to convert.
- * @returns {Array} Returns the new property path array.
+ * @category Utilities
+ * @param {string} string The string to unescape.
+ * @returns {string} Returns the unescaped string.
* @example
*
- * _.toPath('a.b.c');
- * // => ['a', 'b', 'c']
- *
- * _.toPath('a[0].b.c');
- * // => ['a', '0', 'b', 'c']
- *
- * var path = ['a', 'b', 'c'],
- * newPath = _.toPath(path);
- *
- * console.log(newPath);
- * // => ['a', 'b', 'c']
- *
- * console.log(path === newPath);
- * // => false
+ * _.unescape('Fred, Barney & Pebbles');
+ * // => 'Fred, Barney & Pebbles'
*/
- function toPath(value) {
- return isArray(value) ? arrayMap(value, String) : stringToPath(value);
+ function unescape(string) {
+ return string == null ? '' : String(string).replace(reEscapedHtml, unescapeHtmlChar);
}
/**
- * Generates a unique ID. If `prefix` is given the ID is appended to it.
+ * Generates a unique ID. If `prefix` is provided the ID will be appended to it.
*
* @static
* @memberOf _
- * @category Util
- * @param {string} [prefix=''] The value to prefix the ID with.
+ * @category Utilities
+ * @param {string} [prefix] The value to prefix the ID with.
* @returns {string} Returns the unique ID.
* @example
*
*/
function uniqueId(prefix) {
var id = ++idCounter;
- return toString(prefix) + id;
- }
-
- /*------------------------------------------------------------------------*/
-
- /**
- * Adds two numbers.
- *
- * @static
- * @memberOf _
- * @category Math
- * @param {number} augend The first number in an addition.
- * @param {number} addend The second number in an addition.
- * @returns {number} Returns the total.
- * @example
- *
- * _.add(6, 4);
- * // => 10
- */
- function add(augend, addend) {
- var result;
- if (augend === undefined && addend === undefined) {
- return 0;
- }
- if (augend !== undefined) {
- result = augend;
- }
- if (addend !== undefined) {
- result = result === undefined ? addend : (result + addend);
- }
- return result;
- }
-
- /**
- * Computes `number` rounded up to `precision`.
- *
- * @static
- * @memberOf _
- * @category Math
- * @param {number} number The number to round up.
- * @param {number} [precision=0] The precision to round up to.
- * @returns {number} Returns the rounded up number.
- * @example
- *
- * _.ceil(4.006);
- * // => 5
- *
- * _.ceil(6.004, 2);
- * // => 6.01
- *
- * _.ceil(6040, -2);
- * // => 6100
- */
- var ceil = createRound('ceil');
-
- /**
- * Computes `number` rounded down to `precision`.
- *
- * @static
- * @memberOf _
- * @category Math
- * @param {number} number The number to round down.
- * @param {number} [precision=0] The precision to round down to.
- * @returns {number} Returns the rounded down number.
- * @example
- *
- * _.floor(4.006);
- * // => 4
- *
- * _.floor(0.046, 2);
- * // => 0.04
- *
- * _.floor(4060, -2);
- * // => 4000
- */
- var floor = createRound('floor');
-
- /**
- * Computes the maximum value of `array`. If `array` is empty or falsey
- * `undefined` is returned.
- *
- * @static
- * @memberOf _
- * @category Math
- * @param {Array} array The array to iterate over.
- * @returns {*} Returns the maximum value.
- * @example
- *
- * _.max([4, 2, 8, 6]);
- * // => 8
- *
- * _.max([]);
- * // => undefined
- */
- function max(array) {
- return (array && array.length)
- ? baseExtremum(array, identity, gt)
- : undefined;
- }
-
- /**
- * This method is like `_.max` except that it accepts `iteratee` which is
- * invoked for each element in `array` to generate the criterion by which
- * the value is ranked. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @category Math
- * @param {Array} array The array to iterate over.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {*} Returns the maximum value.
- * @example
- *
- * var objects = [{ 'n': 1 }, { 'n': 2 }];
- *
- * _.maxBy(objects, function(o) { return o.n; });
- * // => { 'n': 2 }
- *
- * // The `_.property` iteratee shorthand.
- * _.maxBy(objects, 'n');
- * // => { 'n': 2 }
- */
- function maxBy(array, iteratee) {
- return (array && array.length)
- ? baseExtremum(array, getIteratee(iteratee), gt)
- : undefined;
+ return String(prefix == null ? '' : prefix) + id;
}
- /**
- * Computes the mean of the values in `array`.
- *
- * @static
- * @memberOf _
- * @category Math
- * @param {Array} array The array to iterate over.
- * @returns {number} Returns the mean.
- * @example
- *
- * _.mean([4, 2, 8, 6]);
- * // => 5
- */
- function mean(array) {
- return sum(array) / (array ? array.length : 0);
- }
+ /*--------------------------------------------------------------------------*/
/**
- * Computes the minimum value of `array`. If `array` is empty or falsey
- * `undefined` is returned.
+ * Creates a `lodash` object that wraps the given value with explicit
+ * method chaining enabled.
*
* @static
* @memberOf _
- * @category Math
- * @param {Array} array The array to iterate over.
- * @returns {*} Returns the minimum value.
+ * @category Chaining
+ * @param {*} value The value to wrap.
+ * @returns {Object} Returns the wrapper object.
* @example
*
- * _.min([4, 2, 8, 6]);
- * // => 2
+ * var characters = [
+ * { 'name': 'barney', 'age': 36 },
+ * { 'name': 'fred', 'age': 40 },
+ * { 'name': 'pebbles', 'age': 1 }
+ * ];
*
- * _.min([]);
- * // => undefined
+ * var youngest = _.chain(characters)
+ * .sortBy('age')
+ * .map(function(chr) { return chr.name + ' is ' + chr.age; })
+ * .first()
+ * .value();
+ * // => 'pebbles is 1'
*/
- function min(array) {
- return (array && array.length)
- ? baseExtremum(array, identity, lt)
- : undefined;
+ function chain(value) {
+ value = new lodashWrapper(value);
+ value.__chain__ = true;
+ return value;
}
/**
- * This method is like `_.min` except that it accepts `iteratee` which is
- * invoked for each element in `array` to generate the criterion by which
- * the value is ranked. The iteratee is invoked with one argument: (value).
+ * Invokes `interceptor` with the `value` as the first argument and then
+ * returns `value`. The purpose of this method is to "tap into" a method
+ * chain in order to perform operations on intermediate results within
+ * the chain.
*
* @static
* @memberOf _
- * @category Math
- * @param {Array} array The array to iterate over.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {*} Returns the minimum value.
+ * @category Chaining
+ * @param {*} value The value to provide to `interceptor`.
+ * @param {Function} interceptor The function to invoke.
+ * @returns {*} Returns `value`.
* @example
*
- * var objects = [{ 'n': 1 }, { 'n': 2 }];
- *
- * _.minBy(objects, function(o) { return o.n; });
- * // => { 'n': 1 }
- *
- * // The `_.property` iteratee shorthand.
- * _.minBy(objects, 'n');
- * // => { 'n': 1 }
+ * _([1, 2, 3, 4])
+ * .tap(function(array) { array.pop(); })
+ * .reverse()
+ * .value();
+ * // => [3, 2, 1]
*/
- function minBy(array, iteratee) {
- return (array && array.length)
- ? baseExtremum(array, getIteratee(iteratee), lt)
- : undefined;
+ function tap(value, interceptor) {
+ interceptor(value);
+ return value;
}
/**
- * Computes `number` rounded to `precision`.
+ * Enables explicit method chaining on the wrapper object.
*
- * @static
+ * @name chain
* @memberOf _
- * @category Math
- * @param {number} number The number to round.
- * @param {number} [precision=0] The precision to round to.
- * @returns {number} Returns the rounded number.
+ * @category Chaining
+ * @returns {*} Returns the wrapper object.
* @example
*
- * _.round(4.006);
- * // => 4
- *
- * _.round(4.006, 2);
- * // => 4.01
- *
- * _.round(4060, -2);
- * // => 4100
- */
- var round = createRound('round');
-
- /**
- * Subtract two numbers.
+ * var characters = [
+ * { 'name': 'barney', 'age': 36 },
+ * { 'name': 'fred', 'age': 40 }
+ * ];
*
- * @static
- * @memberOf _
- * @category Math
- * @param {number} minuend The first number in a subtraction.
- * @param {number} subtrahend The second number in a subtraction.
- * @returns {number} Returns the difference.
- * @example
+ * // without explicit chaining
+ * _(characters).first();
+ * // => { 'name': 'barney', 'age': 36 }
*
- * _.subtract(6, 4);
- * // => 2
+ * // with explicit chaining
+ * _(characters).chain()
+ * .first()
+ * .pick('age')
+ * .value();
+ * // => { 'age': 36 }
*/
- function subtract(minuend, subtrahend) {
- var result;
- if (minuend === undefined && subtrahend === undefined) {
- return 0;
- }
- if (minuend !== undefined) {
- result = minuend;
- }
- if (subtrahend !== undefined) {
- result = result === undefined ? subtrahend : (result - subtrahend);
- }
- return result;
+ function wrapperChain() {
+ this.__chain__ = true;
+ return this;
}
/**
- * Computes the sum of the values in `array`.
+ * Produces the `toString` result of the wrapped value.
*
- * @static
+ * @name toString
* @memberOf _
- * @category Math
- * @param {Array} array The array to iterate over.
- * @returns {number} Returns the sum.
+ * @category Chaining
+ * @returns {string} Returns the string result.
* @example
*
- * _.sum([4, 2, 8, 6]);
- * // => 20
+ * _([1, 2, 3]).toString();
+ * // => '1,2,3'
*/
- function sum(array) {
- return (array && array.length)
- ? baseSum(array, identity)
- : 0;
+ function wrapperToString() {
+ return String(this.__wrapped__);
}
/**
- * This method is like `_.sum` except that it accepts `iteratee` which is
- * invoked for each element in `array` to generate the value to be summed.
- * The iteratee is invoked with one argument: (value).
+ * Extracts the wrapped value.
*
- * @static
+ * @name valueOf
* @memberOf _
- * @category Math
- * @param {Array} array The array to iterate over.
- * @param {Function|Object|string} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {number} Returns the sum.
+ * @alias value
+ * @category Chaining
+ * @returns {*} Returns the wrapped value.
* @example
*
- * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
- *
- * _.sumBy(objects, function(o) { return o.n; });
- * // => 20
- *
- * // The `_.property` iteratee shorthand.
- * _.sumBy(objects, 'n');
- * // => 20
+ * _([1, 2, 3]).valueOf();
+ * // => [1, 2, 3]
*/
- function sumBy(array, iteratee) {
- return (array && array.length)
- ? baseSum(array, getIteratee(iteratee))
- : 0;
+ function wrapperValueOf() {
+ return this.__wrapped__;
}
- /*------------------------------------------------------------------------*/
-
- // Ensure wrappers are instances of `baseLodash`.
- lodash.prototype = baseLodash.prototype;
- lodash.prototype.constructor = lodash;
-
- LodashWrapper.prototype = baseCreate(baseLodash.prototype);
- LodashWrapper.prototype.constructor = LodashWrapper;
-
- LazyWrapper.prototype = baseCreate(baseLodash.prototype);
- LazyWrapper.prototype.constructor = LazyWrapper;
-
- // Avoid inheriting from `Object.prototype` when possible.
- Hash.prototype = nativeCreate ? nativeCreate(null) : objectProto;
-
- // Add functions to the `MapCache`.
- MapCache.prototype.clear = mapClear;
- MapCache.prototype['delete'] = mapDelete;
- MapCache.prototype.get = mapGet;
- MapCache.prototype.has = mapHas;
- MapCache.prototype.set = mapSet;
-
- // Add functions to the `SetCache`.
- SetCache.prototype.push = cachePush;
-
- // Add functions to the `Stack` cache.
- Stack.prototype.clear = stackClear;
- Stack.prototype['delete'] = stackDelete;
- Stack.prototype.get = stackGet;
- Stack.prototype.has = stackHas;
- Stack.prototype.set = stackSet;
-
- // Assign cache to `_.memoize`.
- memoize.Cache = MapCache;
+ /*--------------------------------------------------------------------------*/
- // Add functions that return wrapped values when chaining.
+ // add functions that return wrapped values when chaining
lodash.after = after;
- lodash.ary = ary;
lodash.assign = assign;
- lodash.assignIn = assignIn;
- lodash.assignInWith = assignInWith;
- lodash.assignWith = assignWith;
lodash.at = at;
- lodash.before = before;
lodash.bind = bind;
lodash.bindAll = bindAll;
lodash.bindKey = bindKey;
- lodash.castArray = castArray;
lodash.chain = chain;
- lodash.chunk = chunk;
lodash.compact = compact;
- lodash.concat = concat;
- lodash.cond = cond;
- lodash.conforms = conforms;
+ lodash.compose = compose;
lodash.constant = constant;
lodash.countBy = countBy;
lodash.create = create;
+ lodash.createCallback = createCallback;
lodash.curry = curry;
- lodash.curryRight = curryRight;
lodash.debounce = debounce;
lodash.defaults = defaults;
- lodash.defaultsDeep = defaultsDeep;
lodash.defer = defer;
lodash.delay = delay;
lodash.difference = difference;
- lodash.differenceBy = differenceBy;
- lodash.differenceWith = differenceWith;
- lodash.drop = drop;
- lodash.dropRight = dropRight;
- lodash.dropRightWhile = dropRightWhile;
- lodash.dropWhile = dropWhile;
- lodash.fill = fill;
lodash.filter = filter;
- lodash.flatMap = flatMap;
lodash.flatten = flatten;
- lodash.flattenDeep = flattenDeep;
- lodash.flattenDepth = flattenDepth;
- lodash.flip = flip;
- lodash.flow = flow;
- lodash.flowRight = flowRight;
- lodash.fromPairs = fromPairs;
+ lodash.forEach = forEach;
+ lodash.forEachRight = forEachRight;
+ lodash.forIn = forIn;
+ lodash.forInRight = forInRight;
+ lodash.forOwn = forOwn;
+ lodash.forOwnRight = forOwnRight;
lodash.functions = functions;
- lodash.functionsIn = functionsIn;
lodash.groupBy = groupBy;
+ lodash.indexBy = indexBy;
lodash.initial = initial;
lodash.intersection = intersection;
- lodash.intersectionBy = intersectionBy;
- lodash.intersectionWith = intersectionWith;
lodash.invert = invert;
- lodash.invertBy = invertBy;
- lodash.invokeMap = invokeMap;
- lodash.iteratee = iteratee;
- lodash.keyBy = keyBy;
+ lodash.invoke = invoke;
lodash.keys = keys;
- lodash.keysIn = keysIn;
lodash.map = map;
- lodash.mapKeys = mapKeys;
lodash.mapValues = mapValues;
- lodash.matches = matches;
- lodash.matchesProperty = matchesProperty;
+ lodash.max = max;
lodash.memoize = memoize;
lodash.merge = merge;
- lodash.mergeWith = mergeWith;
- lodash.method = method;
- lodash.methodOf = methodOf;
- lodash.mixin = mixin;
- lodash.negate = negate;
- lodash.nthArg = nthArg;
+ lodash.min = min;
lodash.omit = omit;
- lodash.omitBy = omitBy;
lodash.once = once;
- lodash.orderBy = orderBy;
- lodash.over = over;
- lodash.overArgs = overArgs;
- lodash.overEvery = overEvery;
- lodash.overSome = overSome;
+ lodash.pairs = pairs;
lodash.partial = partial;
lodash.partialRight = partialRight;
- lodash.partition = partition;
lodash.pick = pick;
- lodash.pickBy = pickBy;
+ lodash.pluck = pluck;
lodash.property = property;
- lodash.propertyOf = propertyOf;
lodash.pull = pull;
- lodash.pullAll = pullAll;
- lodash.pullAllBy = pullAllBy;
- lodash.pullAllWith = pullAllWith;
- lodash.pullAt = pullAt;
lodash.range = range;
- lodash.rangeRight = rangeRight;
- lodash.rearg = rearg;
lodash.reject = reject;
lodash.remove = remove;
lodash.rest = rest;
- lodash.reverse = reverse;
- lodash.sampleSize = sampleSize;
- lodash.set = set;
- lodash.setWith = setWith;
lodash.shuffle = shuffle;
- lodash.slice = slice;
lodash.sortBy = sortBy;
- lodash.sortedUniq = sortedUniq;
- lodash.sortedUniqBy = sortedUniqBy;
- lodash.split = split;
- lodash.spread = spread;
- lodash.tail = tail;
- lodash.take = take;
- lodash.takeRight = takeRight;
- lodash.takeRightWhile = takeRightWhile;
- lodash.takeWhile = takeWhile;
lodash.tap = tap;
lodash.throttle = throttle;
- lodash.thru = thru;
+ lodash.times = times;
lodash.toArray = toArray;
- lodash.toPairs = toPairs;
- lodash.toPairsIn = toPairsIn;
- lodash.toPath = toPath;
- lodash.toPlainObject = toPlainObject;
lodash.transform = transform;
- lodash.unary = unary;
lodash.union = union;
- lodash.unionBy = unionBy;
- lodash.unionWith = unionWith;
lodash.uniq = uniq;
- lodash.uniqBy = uniqBy;
- lodash.uniqWith = uniqWith;
- lodash.unset = unset;
- lodash.unzip = unzip;
- lodash.unzipWith = unzipWith;
- lodash.update = update;
- lodash.updateWith = updateWith;
lodash.values = values;
- lodash.valuesIn = valuesIn;
+ lodash.where = where;
lodash.without = without;
- lodash.words = words;
lodash.wrap = wrap;
lodash.xor = xor;
- lodash.xorBy = xorBy;
- lodash.xorWith = xorWith;
lodash.zip = zip;
lodash.zipObject = zipObject;
- lodash.zipObjectDeep = zipObjectDeep;
- lodash.zipWith = zipWith;
- // Add aliases.
- lodash.extend = assignIn;
- lodash.extendWith = assignInWith;
+ // add aliases
+ lodash.collect = map;
+ lodash.drop = rest;
+ lodash.each = forEach;
+ lodash.eachRight = forEachRight;
+ lodash.extend = assign;
+ lodash.methods = functions;
+ lodash.object = zipObject;
+ lodash.select = filter;
+ lodash.tail = rest;
+ lodash.unique = uniq;
+ lodash.unzip = zip;
- // Add functions to `lodash.prototype`.
- mixin(lodash, lodash);
+ // add functions to `lodash.prototype`
+ mixin(lodash);
- /*------------------------------------------------------------------------*/
+ /*--------------------------------------------------------------------------*/
- // Add functions that return unwrapped values when chaining.
- lodash.add = add;
- lodash.attempt = attempt;
- lodash.camelCase = camelCase;
- lodash.capitalize = capitalize;
- lodash.ceil = ceil;
- lodash.clamp = clamp;
+ // add functions that return unwrapped values when chaining
lodash.clone = clone;
lodash.cloneDeep = cloneDeep;
- lodash.cloneDeepWith = cloneDeepWith;
- lodash.cloneWith = cloneWith;
- lodash.deburr = deburr;
- lodash.endsWith = endsWith;
- lodash.eq = eq;
+ lodash.contains = contains;
lodash.escape = escape;
- lodash.escapeRegExp = escapeRegExp;
lodash.every = every;
lodash.find = find;
lodash.findIndex = findIndex;
lodash.findLast = findLast;
lodash.findLastIndex = findLastIndex;
lodash.findLastKey = findLastKey;
- lodash.floor = floor;
- lodash.forEach = forEach;
- lodash.forEachRight = forEachRight;
- lodash.forIn = forIn;
- lodash.forInRight = forInRight;
- lodash.forOwn = forOwn;
- lodash.forOwnRight = forOwnRight;
- lodash.get = get;
- lodash.gt = gt;
- lodash.gte = gte;
lodash.has = has;
- lodash.hasIn = hasIn;
- lodash.head = head;
lodash.identity = identity;
- lodash.includes = includes;
lodash.indexOf = indexOf;
- lodash.inRange = inRange;
- lodash.invoke = invoke;
lodash.isArguments = isArguments;
lodash.isArray = isArray;
- lodash.isArrayBuffer = isArrayBuffer;
- lodash.isArrayLike = isArrayLike;
- lodash.isArrayLikeObject = isArrayLikeObject;
lodash.isBoolean = isBoolean;
- lodash.isBuffer = isBuffer;
lodash.isDate = isDate;
lodash.isElement = isElement;
lodash.isEmpty = isEmpty;
lodash.isEqual = isEqual;
- lodash.isEqualWith = isEqualWith;
- lodash.isError = isError;
lodash.isFinite = isFinite;
lodash.isFunction = isFunction;
- lodash.isInteger = isInteger;
- lodash.isLength = isLength;
- lodash.isMap = isMap;
- lodash.isMatch = isMatch;
- lodash.isMatchWith = isMatchWith;
lodash.isNaN = isNaN;
- lodash.isNative = isNative;
- lodash.isNil = isNil;
lodash.isNull = isNull;
lodash.isNumber = isNumber;
lodash.isObject = isObject;
- lodash.isObjectLike = isObjectLike;
lodash.isPlainObject = isPlainObject;
lodash.isRegExp = isRegExp;
- lodash.isSafeInteger = isSafeInteger;
- lodash.isSet = isSet;
lodash.isString = isString;
- lodash.isSymbol = isSymbol;
- lodash.isTypedArray = isTypedArray;
lodash.isUndefined = isUndefined;
- lodash.isWeakMap = isWeakMap;
- lodash.isWeakSet = isWeakSet;
- lodash.join = join;
- lodash.kebabCase = kebabCase;
- lodash.last = last;
lodash.lastIndexOf = lastIndexOf;
- lodash.lowerCase = lowerCase;
- lodash.lowerFirst = lowerFirst;
- lodash.lt = lt;
- lodash.lte = lte;
- lodash.max = max;
- lodash.maxBy = maxBy;
- lodash.mean = mean;
- lodash.min = min;
- lodash.minBy = minBy;
+ lodash.mixin = mixin;
lodash.noConflict = noConflict;
lodash.noop = noop;
lodash.now = now;
- lodash.pad = pad;
- lodash.padEnd = padEnd;
- lodash.padStart = padStart;
lodash.parseInt = parseInt;
lodash.random = random;
lodash.reduce = reduce;
lodash.reduceRight = reduceRight;
- lodash.repeat = repeat;
- lodash.replace = replace;
lodash.result = result;
- lodash.round = round;
lodash.runInContext = runInContext;
- lodash.sample = sample;
lodash.size = size;
- lodash.snakeCase = snakeCase;
lodash.some = some;
lodash.sortedIndex = sortedIndex;
- lodash.sortedIndexBy = sortedIndexBy;
- lodash.sortedIndexOf = sortedIndexOf;
- lodash.sortedLastIndex = sortedLastIndex;
- lodash.sortedLastIndexBy = sortedLastIndexBy;
- lodash.sortedLastIndexOf = sortedLastIndexOf;
- lodash.startCase = startCase;
- lodash.startsWith = startsWith;
- lodash.subtract = subtract;
- lodash.sum = sum;
- lodash.sumBy = sumBy;
lodash.template = template;
- lodash.times = times;
- lodash.toInteger = toInteger;
- lodash.toLength = toLength;
- lodash.toLower = toLower;
- lodash.toNumber = toNumber;
- lodash.toSafeInteger = toSafeInteger;
- lodash.toString = toString;
- lodash.toUpper = toUpper;
- lodash.trim = trim;
- lodash.trimEnd = trimEnd;
- lodash.trimStart = trimStart;
- lodash.truncate = truncate;
lodash.unescape = unescape;
lodash.uniqueId = uniqueId;
- lodash.upperCase = upperCase;
- lodash.upperFirst = upperFirst;
-
- // Add aliases.
- lodash.each = forEach;
- lodash.eachRight = forEachRight;
- lodash.first = head;
- mixin(lodash, (function() {
- var source = {};
- baseForOwn(lodash, function(func, methodName) {
- if (!hasOwnProperty.call(lodash.prototype, methodName)) {
+ // add aliases
+ lodash.all = every;
+ lodash.any = some;
+ lodash.detect = find;
+ lodash.findWhere = find;
+ lodash.foldl = reduce;
+ lodash.foldr = reduceRight;
+ lodash.include = contains;
+ lodash.inject = reduce;
+
+ mixin(function() {
+ var source = {}
+ forOwn(lodash, function(func, methodName) {
+ if (!lodash.prototype[methodName]) {
source[methodName] = func;
}
});
return source;
- }()), { 'chain': false });
-
- /*------------------------------------------------------------------------*/
+ }(), false);
- /**
- * The semantic version number.
- *
- * @static
- * @memberOf _
- * @type {string}
- */
- lodash.VERSION = VERSION;
+ /*--------------------------------------------------------------------------*/
- // Assign default placeholders.
- arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
- lodash[methodName].placeholder = lodash;
- });
+ // add functions capable of returning wrapped and unwrapped values when chaining
+ lodash.first = first;
+ lodash.last = last;
+ lodash.sample = sample;
- // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
- arrayEach(['drop', 'take'], function(methodName, index) {
- LazyWrapper.prototype[methodName] = function(n) {
- var filtered = this.__filtered__;
- if (filtered && !index) {
- return new LazyWrapper(this);
- }
- n = n === undefined ? 1 : nativeMax(toInteger(n), 0);
+ // add aliases
+ lodash.take = first;
+ lodash.head = first;
- var result = this.clone();
- if (filtered) {
- result.__takeCount__ = nativeMin(n, result.__takeCount__);
- } else {
- result.__views__.push({
- 'size': nativeMin(n, MAX_ARRAY_LENGTH),
- 'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
- });
- }
- return result;
- };
+ forOwn(lodash, function(func, methodName) {
+ var callbackable = methodName !== 'sample';
+ if (!lodash.prototype[methodName]) {
+ lodash.prototype[methodName]= function(n, guard) {
+ var chainAll = this.__chain__,
+ result = func(this.__wrapped__, n, guard);
- LazyWrapper.prototype[methodName + 'Right'] = function(n) {
- return this.reverse()[methodName](n).reverse();
- };
+ return !chainAll && (n == null || (guard && !(callbackable && typeof n == 'function')))
+ ? result
+ : new lodashWrapper(result, chainAll);
+ };
+ }
});
- // Add `LazyWrapper` methods that accept an `iteratee` value.
- arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
- var type = index + 1,
- isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;
+ /*--------------------------------------------------------------------------*/
- LazyWrapper.prototype[methodName] = function(iteratee) {
- var result = this.clone();
- result.__iteratees__.push({
- 'iteratee': getIteratee(iteratee, 3),
- 'type': type
- });
- result.__filtered__ = result.__filtered__ || isFilter;
- return result;
- };
- });
-
- // Add `LazyWrapper` methods for `_.head` and `_.last`.
- arrayEach(['head', 'last'], function(methodName, index) {
- var takeName = 'take' + (index ? 'Right' : '');
+ /**
+ * The semantic version number.
+ *
+ * @static
+ * @memberOf _
+ * @type string
+ */
+ lodash.VERSION = '2.4.1';
- LazyWrapper.prototype[methodName] = function() {
- return this[takeName](1).value()[0];
- };
- });
+ // add "Chaining" functions to the wrapper
+ lodash.prototype.chain = wrapperChain;
+ lodash.prototype.toString = wrapperToString;
+ lodash.prototype.value = wrapperValueOf;
+ lodash.prototype.valueOf = wrapperValueOf;
- // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
- arrayEach(['initial', 'tail'], function(methodName, index) {
- var dropName = 'drop' + (index ? '' : 'Right');
+ // add `Array` functions that return unwrapped values
+ baseEach(['join', 'pop', 'shift'], function(methodName) {
+ var func = arrayRef[methodName];
+ lodash.prototype[methodName] = function() {
+ var chainAll = this.__chain__,
+ result = func.apply(this.__wrapped__, arguments);
- LazyWrapper.prototype[methodName] = function() {
- return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
+ return chainAll
+ ? new lodashWrapper(result, chainAll)
+ : result;
};
});
- LazyWrapper.prototype.compact = function() {
- return this.filter(identity);
- };
-
- LazyWrapper.prototype.find = function(predicate) {
- return this.filter(predicate).head();
- };
-
- LazyWrapper.prototype.findLast = function(predicate) {
- return this.reverse().find(predicate);
- };
-
- LazyWrapper.prototype.invokeMap = rest(function(path, args) {
- if (typeof path == 'function') {
- return new LazyWrapper(this);
- }
- return this.map(function(value) {
- return baseInvoke(value, path, args);
- });
- });
-
- LazyWrapper.prototype.reject = function(predicate) {
- predicate = getIteratee(predicate, 3);
- return this.filter(function(value) {
- return !predicate(value);
- });
- };
-
- LazyWrapper.prototype.slice = function(start, end) {
- start = toInteger(start);
-
- var result = this;
- if (result.__filtered__ && (start > 0 || end < 0)) {
- return new LazyWrapper(result);
- }
- if (start < 0) {
- result = result.takeRight(-start);
- } else if (start) {
- result = result.drop(start);
- }
- if (end !== undefined) {
- end = toInteger(end);
- result = end < 0 ? result.dropRight(-end) : result.take(end - start);
- }
- return result;
- };
-
- LazyWrapper.prototype.takeRightWhile = function(predicate) {
- return this.reverse().takeWhile(predicate).reverse();
- };
-
- LazyWrapper.prototype.toArray = function() {
- return this.take(MAX_ARRAY_LENGTH);
- };
-
- // Add `LazyWrapper` methods to `lodash.prototype`.
- baseForOwn(LazyWrapper.prototype, function(func, methodName) {
- var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
- isTaker = /^(?:head|last)$/.test(methodName),
- lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],
- retUnwrapped = isTaker || /^find/.test(methodName);
-
- if (!lodashFunc) {
- return;
- }
+ // add `Array` functions that return the existing wrapped value
+ baseEach(['push', 'reverse', 'sort', 'unshift'], function(methodName) {
+ var func = arrayRef[methodName];
lodash.prototype[methodName] = function() {
- var value = this.__wrapped__,
- args = isTaker ? [1] : arguments,
- isLazy = value instanceof LazyWrapper,
- iteratee = args[0],
- useLazy = isLazy || isArray(value);
-
- var interceptor = function(value) {
- var result = lodashFunc.apply(lodash, arrayPush([value], args));
- return (isTaker && chainAll) ? result[0] : result;
- };
-
- if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
- // Avoid lazy use if the iteratee has a "length" value other than `1`.
- isLazy = useLazy = false;
- }
- var chainAll = this.__chain__,
- isHybrid = !!this.__actions__.length,
- isUnwrapped = retUnwrapped && !chainAll,
- onlyLazy = isLazy && !isHybrid;
-
- if (!retUnwrapped && useLazy) {
- value = onlyLazy ? value : new LazyWrapper(this);
- var result = func.apply(value, args);
- result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
- return new LodashWrapper(result, chainAll);
- }
- if (isUnwrapped && onlyLazy) {
- return func.apply(this, args);
- }
- result = this.thru(interceptor);
- return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
+ func.apply(this.__wrapped__, arguments);
+ return this;
};
});
- // Add `Array` and `String` methods to `lodash.prototype`.
- arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
- var func = arrayProto[methodName],
- chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
- retUnwrapped = /^(?:pop|shift)$/.test(methodName);
-
+ // add `Array` functions that return new wrapped values
+ baseEach(['concat', 'slice', 'splice'], function(methodName) {
+ var func = arrayRef[methodName];
lodash.prototype[methodName] = function() {
- var args = arguments;
- if (retUnwrapped && !this.__chain__) {
- return func.apply(this.value(), args);
- }
- return this[chainName](function(value) {
- return func.apply(value, args);
- });
+ return new lodashWrapper(func.apply(this.__wrapped__, arguments), this.__chain__);
};
});
- // Map minified function names to their real names.
- baseForOwn(LazyWrapper.prototype, function(func, methodName) {
- var lodashFunc = lodash[methodName];
- if (lodashFunc) {
- var key = (lodashFunc.name + ''),
- names = realNames[key] || (realNames[key] = []);
-
- names.push({ 'name': methodName, 'func': lodashFunc });
- }
- });
+ // avoid array-like object bugs with `Array#shift` and `Array#splice`
+ // in IE < 9, Firefox < 10, Narwhal, and RingoJS
+ if (!support.spliceObjects) {
+ baseEach(['pop', 'shift', 'splice'], function(methodName) {
+ var func = arrayRef[methodName],
+ isSplice = methodName == 'splice';
- realNames[createHybridWrapper(undefined, BIND_KEY_FLAG).name] = [{
- 'name': 'wrapper',
- 'func': undefined
- }];
+ lodash.prototype[methodName] = function() {
+ var chainAll = this.__chain__,
+ value = this.__wrapped__,
+ result = func.apply(value, arguments);
- // Add functions to the lazy wrapper.
- LazyWrapper.prototype.clone = lazyClone;
- LazyWrapper.prototype.reverse = lazyReverse;
- LazyWrapper.prototype.value = lazyValue;
+ if (value.length === 0) {
+ delete value[0];
+ }
+ return (chainAll || isSplice)
+ ? new lodashWrapper(result, chainAll)
+ : result;
+ };
+ });
+ }
- // Add chaining functions to the `lodash` wrapper.
- lodash.prototype.at = wrapperAt;
- lodash.prototype.chain = wrapperChain;
- lodash.prototype.commit = wrapperCommit;
- lodash.prototype.flatMap = wrapperFlatMap;
- lodash.prototype.next = wrapperNext;
- lodash.prototype.plant = wrapperPlant;
- lodash.prototype.reverse = wrapperReverse;
- lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;
+ // add pseudo private property to be used and removed during the build process
+ lodash._baseEach = baseEach;
+ lodash._iteratorTemplate = iteratorTemplate;
+ lodash._shimKeys = shimKeys;
- if (iteratorSymbol) {
- lodash.prototype[iteratorSymbol] = wrapperToIterator;
- }
return lodash;
}
/*--------------------------------------------------------------------------*/
- // Export lodash.
+ // expose Lo-Dash
var _ = runInContext();
- // Expose lodash on the free variable `window` or `self` when available. This
- // prevents errors in cases where lodash is loaded by a script tag in the presence
- // of an AMD loader. See http://requirejs.org/docs/errors.html#mismatch for more details.
- (freeWindow || freeSelf || {})._ = _;
-
- // Some AMD build optimizers like r.js check for condition patterns like the following:
+ // some AMD build optimizers like r.js check for condition patterns like the following:
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
- // Define as an anonymous module so, through path mapping, it can be
- // referenced as the "underscore" module.
+ // Expose Lo-Dash to the global object even when an AMD loader is present in
+ // case Lo-Dash is loaded with a RequireJS shim config.
+ // See http://requirejs.org/docs/api.html#config-shim
+ root._ = _;
+
+ // define as an anonymous module so, through path mapping, it can be
+ // referenced as the "underscore" module
define(function() {
return _;
});
}
- // Check for `exports` after `define` in case a build optimizer adds an `exports` object.
+ // check for `exports` after `define` in case a build optimizer adds an `exports` object
else if (freeExports && freeModule) {
- // Export for Node.js.
+ // in Node.js or RingoJS
if (moduleExports) {
(freeModule.exports = _)._ = _;
}
- // Export for CommonJS support.
- freeExports._ = _;
+ // in Narwhal or Rhino -require
+ else {
+ freeExports._ = _;
+ }
}
else {
- // Export to the global object.
+ // in a browser or Rhino
root._ = _;
}
}.call(this));
projects / libreplanet-static.git / commitdiff