5153 lines
162 KiB
JavaScript
5153 lines
162 KiB
JavaScript
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/**
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* @license
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* Lo-Dash 1.0.2 (Custom Build) <http://lodash.com/>
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* Build: `lodash -o ./dist/lodash.compat.js`
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* Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.4.4 <http://underscorejs.org/>
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* Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud Inc.
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* Available under MIT license <http://lodash.com/license>
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*/
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;(function(window, undefined) {
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/** Detect free variable `exports` */
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var freeExports = typeof exports == 'object' && exports;
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/** Detect free variable `module` */
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var freeModule = typeof module == 'object' && module && module.exports == freeExports && module;
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/** Detect free variable `global` and use it as `window` */
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var freeGlobal = typeof global == 'object' && global;
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if (freeGlobal.global === freeGlobal) {
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window = freeGlobal;
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}
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/** Used for array and object method references */
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var arrayRef = [],
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objectRef = {};
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/** Used to generate unique IDs */
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var idCounter = 0;
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/** Used internally to indicate various things */
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var indicatorObject = objectRef;
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/** Used by `cachedContains` as the default size when optimizations are enabled for large arrays */
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var largeArraySize = 30;
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/** Used to restore the original `_` reference in `noConflict` */
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var oldDash = window._;
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/** Used to match HTML entities */
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var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g;
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/** Used to match empty string literals in compiled template source */
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var reEmptyStringLeading = /\b__p \+= '';/g,
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reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
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reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
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/** Used to match regexp flags from their coerced string values */
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var reFlags = /\w*$/;
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/** Used to detect if a method is native */
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var reNative = RegExp('^' +
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(objectRef.valueOf + '')
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.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
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.replace(/valueOf|for [^\]]+/g, '.+?') + '$'
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);
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/**
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* Used to match ES6 template delimiters
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* http://people.mozilla.org/~jorendorff/es6-draft.html#sec-7.8.6
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*/
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var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
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/** Used to match "interpolate" template delimiters */
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var reInterpolate = /<%=([\s\S]+?)%>/g;
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/** Used to ensure capturing order of template delimiters */
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var reNoMatch = /($^)/;
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/** Used to match HTML characters */
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var reUnescapedHtml = /[&<>"']/g;
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/** Used to match unescaped characters in compiled string literals */
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var reUnescapedString = /['\n\r\t\u2028\u2029\\]/g;
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/** Used to fix the JScript [[DontEnum]] bug */
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var shadowed = [
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'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable',
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'toLocaleString', 'toString', 'valueOf'
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];
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/** Used to make template sourceURLs easier to identify */
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var templateCounter = 0;
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/** Native method shortcuts */
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var ceil = Math.ceil,
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concat = arrayRef.concat,
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floor = Math.floor,
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getPrototypeOf = reNative.test(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf,
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hasOwnProperty = objectRef.hasOwnProperty,
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push = arrayRef.push,
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toString = objectRef.toString;
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/* Native method shortcuts for methods with the same name as other `lodash` methods */
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var nativeBind = reNative.test(nativeBind = slice.bind) && nativeBind,
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nativeIsArray = reNative.test(nativeIsArray = Array.isArray) && nativeIsArray,
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nativeIsFinite = window.isFinite,
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nativeIsNaN = window.isNaN,
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nativeKeys = reNative.test(nativeKeys = Object.keys) && nativeKeys,
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nativeMax = Math.max,
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nativeMin = Math.min,
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nativeRandom = Math.random;
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/** `Object#toString` result shortcuts */
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var argsClass = '[object Arguments]',
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arrayClass = '[object Array]',
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boolClass = '[object Boolean]',
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dateClass = '[object Date]',
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funcClass = '[object Function]',
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numberClass = '[object Number]',
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objectClass = '[object Object]',
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regexpClass = '[object RegExp]',
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stringClass = '[object String]';
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/** Detect various environments */
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var isIeOpera = !!window.attachEvent,
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isV8 = nativeBind && !/\n|true/.test(nativeBind + isIeOpera);
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/* Detect if `Function#bind` exists and is inferred to be fast (all but V8) */
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var isBindFast = nativeBind && !isV8;
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/* Detect if `Object.keys` exists and is inferred to be fast (IE, Opera, V8) */
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var isKeysFast = nativeKeys && (isIeOpera || isV8);
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/**
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* Detect the JScript [[DontEnum]] bug:
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*
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* In IE < 9 an objects own properties, shadowing non-enumerable ones, are
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* made non-enumerable as well.
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*/
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var hasDontEnumBug;
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/**
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* Detect if a `prototype` properties are enumerable by default:
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*
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* Firefox < 3.6, Opera > 9.50 - Opera < 11.60, and Safari < 5.1
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* (if the prototype or a property on the prototype has been set)
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* incorrectly sets a function's `prototype` property [[Enumerable]]
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* value to `true`.
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*/
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var hasEnumPrototype;
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/** Detect if own properties are iterated after inherited properties (IE < 9) */
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var iteratesOwnLast;
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/**
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* Detect if `Array#shift` and `Array#splice` augment array-like objects
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* incorrectly:
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*
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* Firefox < 10, IE compatibility mode, and IE < 9 have buggy Array `shift()`
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* and `splice()` functions that fail to remove the last element, `value[0]`,
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* of array-like objects even though the `length` property is set to `0`.
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* The `shift()` method is buggy in IE 8 compatibility mode, while `splice()`
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* is buggy regardless of mode in IE < 9 and buggy in compatibility mode in IE 9.
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*/
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var hasObjectSpliceBug = (hasObjectSpliceBug = { '0': 1, 'length': 1 },
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arrayRef.splice.call(hasObjectSpliceBug, 0, 1), hasObjectSpliceBug[0]);
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/** Detect if `arguments` object indexes are non-enumerable (Firefox < 4, IE < 9, PhantomJS, Safari < 5.1) */
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var nonEnumArgs = true;
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(function() {
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var props = [];
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function ctor() { this.x = 1; }
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ctor.prototype = { 'valueOf': 1, 'y': 1 };
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for (var prop in new ctor) { props.push(prop); }
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for (prop in arguments) { nonEnumArgs = !prop; }
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hasDontEnumBug = !/valueOf/.test(props);
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hasEnumPrototype = ctor.propertyIsEnumerable('prototype');
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iteratesOwnLast = props[0] != 'x';
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}(1));
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/** Detect if `arguments` objects are `Object` objects (all but Opera < 10.5) */
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var argsAreObjects = arguments.constructor == Object;
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/** Detect if `arguments` objects [[Class]] is unresolvable (Firefox < 4, IE < 9) */
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var noArgsClass = !isArguments(arguments);
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/**
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* Detect lack of support for accessing string characters by index:
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*
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* IE < 8 can't access characters by index and IE 8 can only access
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* characters by index on string literals.
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*/
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var noCharByIndex = ('x'[0] + Object('x')[0]) != 'xx';
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/**
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* Detect if a DOM node's [[Class]] is unresolvable (IE < 9)
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* and that the JS engine won't error when attempting to coerce an object to
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* a string without a `toString` function.
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*/
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try {
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var noNodeClass = toString.call(document) == objectClass && !({ 'toString': 0 } + '');
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} catch(e) { }
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/** Used to identify object classifications that `_.clone` supports */
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var cloneableClasses = {};
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cloneableClasses[funcClass] = false;
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cloneableClasses[argsClass] = cloneableClasses[arrayClass] =
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cloneableClasses[boolClass] = cloneableClasses[dateClass] =
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cloneableClasses[numberClass] = cloneableClasses[objectClass] =
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cloneableClasses[regexpClass] = cloneableClasses[stringClass] = true;
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/** Used to lookup a built-in constructor by [[Class]] */
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var ctorByClass = {};
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ctorByClass[arrayClass] = Array;
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ctorByClass[boolClass] = Boolean;
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ctorByClass[dateClass] = Date;
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ctorByClass[objectClass] = Object;
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ctorByClass[numberClass] = Number;
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ctorByClass[regexpClass] = RegExp;
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ctorByClass[stringClass] = String;
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/** Used to determine if values are of the language type Object */
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var objectTypes = {
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'boolean': false,
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'function': true,
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'object': true,
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'number': false,
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'string': false,
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'undefined': false
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};
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/** Used to escape characters for inclusion in compiled string literals */
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var stringEscapes = {
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'\\': '\\',
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"'": "'",
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'\n': 'n',
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'\r': 'r',
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'\t': 't',
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'\u2028': 'u2028',
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'\u2029': 'u2029'
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};
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/*--------------------------------------------------------------------------*/
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/**
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* Creates a `lodash` object, that wraps the given `value`, to enable method
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* chaining.
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*
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* In addition to Lo-Dash methods, wrappers also have the following `Array` methods:
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* `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`,
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* and `unshift`
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*
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* The chainable wrapper functions are:
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* `after`, `assign`, `bind`, `bindAll`, `bindKey`, `chain`, `compact`, `compose`,
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* `concat`, `countBy`, `debounce`, `defaults`, `defer`, `delay`, `difference`,
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* `filter`, `flatten`, `forEach`, `forIn`, `forOwn`, `functions`, `groupBy`,
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* `initial`, `intersection`, `invert`, `invoke`, `keys`, `map`, `max`, `memoize`,
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* `merge`, `min`, `object`, `omit`, `once`, `pairs`, `partial`, `partialRight`,
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* `pick`, `pluck`, `push`, `range`, `reject`, `rest`, `reverse`, `shuffle`,
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* `slice`, `sort`, `sortBy`, `splice`, `tap`, `throttle`, `times`, `toArray`,
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* `union`, `uniq`, `unshift`, `values`, `where`, `without`, `wrap`, and `zip`
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*
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* The non-chainable wrapper functions are:
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* `clone`, `cloneDeep`, `contains`, `escape`, `every`, `find`, `has`, `identity`,
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* `indexOf`, `isArguments`, `isArray`, `isBoolean`, `isDate`, `isElement`, `isEmpty`,
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* `isEqual`, `isFinite`, `isFunction`, `isNaN`, `isNull`, `isNumber`, `isObject`,
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* `isPlainObject`, `isRegExp`, `isString`, `isUndefined`, `join`, `lastIndexOf`,
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* `mixin`, `noConflict`, `pop`, `random`, `reduce`, `reduceRight`, `result`,
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* `shift`, `size`, `some`, `sortedIndex`, `template`, `unescape`, and `uniqueId`
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*
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* The wrapper functions `first` and `last` return wrapped values when `n` is
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* passed, otherwise they return unwrapped values.
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*
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* @name _
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* @constructor
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* @category Chaining
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* @param {Mixed} value The value to wrap in a `lodash` instance.
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* @returns {Object} Returns a `lodash` instance.
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*/
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function lodash(value) {
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// exit early if already wrapped, even if wrapped by a different `lodash` constructor
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if (value && typeof value == 'object' && value.__wrapped__) {
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return value;
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}
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// allow invoking `lodash` without the `new` operator
|
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if (!(this instanceof lodash)) {
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return new lodash(value);
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}
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this.__wrapped__ = value;
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}
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/**
|
||
|
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* By default, the template delimiters used by Lo-Dash are similar to those in
|
||
|
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* embedded Ruby (ERB). Change the following template settings to use alternative
|
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* delimiters.
|
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*
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* @static
|
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* @memberOf _
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* @type Object
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*/
|
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lodash.templateSettings = {
|
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|
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|
||
|
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/**
|
||
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* Used to detect `data` property values to be HTML-escaped.
|
||
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*
|
||
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* @memberOf _.templateSettings
|
||
|
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* @type RegExp
|
||
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*/
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||
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'escape': /<%-([\s\S]+?)%>/g,
|
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|
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|
||
|
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/**
|
||
|
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* Used to detect code to be evaluated.
|
||
|
|
*
|
||
|
|
* @memberOf _.templateSettings
|
||
|
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* @type RegExp
|
||
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*/
|
||
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'evaluate': /<%([\s\S]+?)%>/g,
|
||
|
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||
|
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/**
|
||
|
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* Used to detect `data` property values to inject.
|
||
|
|
*
|
||
|
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* @memberOf _.templateSettings
|
||
|
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* @type RegExp
|
||
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*/
|
||
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'interpolate': reInterpolate,
|
||
|
|
|
||
|
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/**
|
||
|
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* Used to reference the data object in the template text.
|
||
|
|
*
|
||
|
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* @memberOf _.templateSettings
|
||
|
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* @type String
|
||
|
|
*/
|
||
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'variable': '',
|
||
|
|
|
||
|
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/**
|
||
|
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* Used to import variables into the compiled template.
|
||
|
|
*
|
||
|
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* @memberOf _.templateSettings
|
||
|
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* @type Object
|
||
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*/
|
||
|
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'imports': {
|
||
|
|
|
||
|
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/**
|
||
|
|
* A reference to the `lodash` function.
|
||
|
|
*
|
||
|
|
* @memberOf _.templateSettings.imports
|
||
|
|
* @type Function
|
||
|
|
*/
|
||
|
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'_': lodash
|
||
|
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}
|
||
|
|
};
|
||
|
|
|
||
|
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/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The template used to create iterator functions.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Obect} data The data object used to populate the text.
|
||
|
|
* @returns {String} Returns the interpolated text.
|
||
|
|
*/
|
||
|
|
var iteratorTemplate = function(obj) {
|
||
|
|
|
||
|
|
var __p = 'var index, iterable = ' +
|
||
|
|
(obj.firstArg ) +
|
||
|
|
', result = iterable;\nif (!iterable) return result;\n' +
|
||
|
|
(obj.top ) +
|
||
|
|
';\n';
|
||
|
|
if (obj.arrays) {
|
||
|
|
__p += 'var length = iterable.length; index = -1;\nif (' +
|
||
|
|
(obj.arrays ) +
|
||
|
|
') { ';
|
||
|
|
if (obj.noCharByIndex) {
|
||
|
|
__p += '\n if (isString(iterable)) {\n iterable = iterable.split(\'\')\n } ';
|
||
|
|
} ;
|
||
|
|
__p += '\n while (++index < length) {\n ' +
|
||
|
|
(obj.loop ) +
|
||
|
|
'\n }\n}\nelse { ';
|
||
|
|
} else if (obj.nonEnumArgs) {
|
||
|
|
__p += '\n var length = iterable.length; index = -1;\n if (length && isArguments(iterable)) {\n while (++index < length) {\n index += \'\';\n ' +
|
||
|
|
(obj.loop ) +
|
||
|
|
'\n }\n } else { ';
|
||
|
|
} ;
|
||
|
|
|
||
|
|
if (obj.hasEnumPrototype) {
|
||
|
|
__p += '\n var skipProto = typeof iterable == \'function\';\n ';
|
||
|
|
} ;
|
||
|
|
|
||
|
|
if (obj.isKeysFast && obj.useHas) {
|
||
|
|
__p += '\n var ownIndex = -1,\n ownProps = objectTypes[typeof iterable] ? nativeKeys(iterable) : [],\n length = ownProps.length;\n\n while (++ownIndex < length) {\n index = ownProps[ownIndex];\n ';
|
||
|
|
if (obj.hasEnumPrototype) {
|
||
|
|
__p += 'if (!(skipProto && index == \'prototype\')) {\n ';
|
||
|
|
} ;
|
||
|
|
__p +=
|
||
|
|
(obj.loop ) +
|
||
|
|
'';
|
||
|
|
if (obj.hasEnumPrototype) {
|
||
|
|
__p += '}\n';
|
||
|
|
} ;
|
||
|
|
__p += ' } ';
|
||
|
|
} else {
|
||
|
|
__p += '\n for (index in iterable) {';
|
||
|
|
if (obj.hasEnumPrototype || obj.useHas) {
|
||
|
|
__p += '\n if (';
|
||
|
|
if (obj.hasEnumPrototype) {
|
||
|
|
__p += '!(skipProto && index == \'prototype\')';
|
||
|
|
} if (obj.hasEnumPrototype && obj.useHas) {
|
||
|
|
__p += ' && ';
|
||
|
|
} if (obj.useHas) {
|
||
|
|
__p += 'hasOwnProperty.call(iterable, index)';
|
||
|
|
} ;
|
||
|
|
__p += ') { ';
|
||
|
|
} ;
|
||
|
|
__p +=
|
||
|
|
(obj.loop ) +
|
||
|
|
'; ';
|
||
|
|
if (obj.hasEnumPrototype || obj.useHas) {
|
||
|
|
__p += '\n }';
|
||
|
|
} ;
|
||
|
|
__p += '\n } ';
|
||
|
|
} ;
|
||
|
|
|
||
|
|
if (obj.hasDontEnumBug) {
|
||
|
|
__p += '\n\n var ctor = iterable.constructor;\n ';
|
||
|
|
for (var k = 0; k < 7; k++) {
|
||
|
|
__p += '\n index = \'' +
|
||
|
|
(obj.shadowed[k] ) +
|
||
|
|
'\';\n if (';
|
||
|
|
if (obj.shadowed[k] == 'constructor') {
|
||
|
|
__p += '!(ctor && ctor.prototype === iterable) && ';
|
||
|
|
} ;
|
||
|
|
__p += 'hasOwnProperty.call(iterable, index)) {\n ' +
|
||
|
|
(obj.loop ) +
|
||
|
|
'\n } ';
|
||
|
|
} ;
|
||
|
|
|
||
|
|
} ;
|
||
|
|
|
||
|
|
if (obj.arrays || obj.nonEnumArgs) {
|
||
|
|
__p += '\n}';
|
||
|
|
} ;
|
||
|
|
__p +=
|
||
|
|
(obj.bottom ) +
|
||
|
|
';\nreturn result';
|
||
|
|
|
||
|
|
|
||
|
|
return __p
|
||
|
|
};
|
||
|
|
|
||
|
|
/** 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]) {',
|
||
|
|
'loop': "if (typeof result[index] == 'undefined') result[index] = iterable[index]",
|
||
|
|
'bottom': ' }\n}'
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Reusable iterator options shared by `each`, `forIn`, and `forOwn` */
|
||
|
|
var eachIteratorOptions = {
|
||
|
|
'args': 'collection, callback, thisArg',
|
||
|
|
'top': "callback = callback && typeof thisArg == 'undefined' ? callback : createCallback(callback, thisArg)",
|
||
|
|
'arrays': "typeof length == 'number'",
|
||
|
|
'loop': 'if (callback(iterable[index], index, collection) === false) return result'
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Reusable iterator options for `forIn` and `forOwn` */
|
||
|
|
var forOwnIteratorOptions = {
|
||
|
|
'top': 'if (!objectTypes[typeof iterable]) return result;\n' + eachIteratorOptions.top,
|
||
|
|
'arrays': false
|
||
|
|
};
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function optimized to search large arrays for a given `value`,
|
||
|
|
* starting at `fromIndex`, using strict equality for comparisons, i.e. `===`.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Array} array The array to search.
|
||
|
|
* @param {Mixed} value The value to search for.
|
||
|
|
* @param {Number} [fromIndex=0] The index to search from.
|
||
|
|
* @param {Number} [largeSize=30] The length at which an array is considered large.
|
||
|
|
* @returns {Boolean} Returns `true`, if `value` is found, else `false`.
|
||
|
|
*/
|
||
|
|
function cachedContains(array, fromIndex, largeSize) {
|
||
|
|
fromIndex || (fromIndex = 0);
|
||
|
|
|
||
|
|
var length = array.length,
|
||
|
|
isLarge = (length - fromIndex) >= (largeSize || largeArraySize);
|
||
|
|
|
||
|
|
if (isLarge) {
|
||
|
|
var cache = {},
|
||
|
|
index = fromIndex - 1;
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
// manually coerce `value` to a string because `hasOwnProperty`, in some
|
||
|
|
// older versions of Firefox, coerces objects incorrectly
|
||
|
|
var key = array[index] + '';
|
||
|
|
(hasOwnProperty.call(cache, key) ? cache[key] : (cache[key] = [])).push(array[index]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return function(value) {
|
||
|
|
if (isLarge) {
|
||
|
|
var key = value + '';
|
||
|
|
return hasOwnProperty.call(cache, key) && indexOf(cache[key], value) > -1;
|
||
|
|
}
|
||
|
|
return indexOf(array, value, fromIndex) > -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Used by `_.max` and `_.min` as the default `callback` when a given
|
||
|
|
* `collection` is a string value.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {String} value The character to inspect.
|
||
|
|
* @returns {Number} Returns the code unit of given character.
|
||
|
|
*/
|
||
|
|
function charAtCallback(value) {
|
||
|
|
return value.charCodeAt(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Used by `sortBy` to compare transformed `collection` values, stable sorting
|
||
|
|
* them in ascending order.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @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 compareAscending(a, b) {
|
||
|
|
var ai = a.index,
|
||
|
|
bi = b.index;
|
||
|
|
|
||
|
|
a = a.criteria;
|
||
|
|
b = b.criteria;
|
||
|
|
|
||
|
|
// ensure a stable sort in V8 and other engines
|
||
|
|
// http://code.google.com/p/v8/issues/detail?id=90
|
||
|
|
if (a !== b) {
|
||
|
|
if (a > b || typeof a == 'undefined') {
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
if (a < b || typeof b == 'undefined') {
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return ai < bi ? -1 : 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that, when called, invokes `func` with the `this` binding
|
||
|
|
* of `thisArg` and prepends any `partialArgs` to the arguments passed to the
|
||
|
|
* bound function.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Function|String} func The function to bind or the method name.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `func`.
|
||
|
|
* @param {Array} partialArgs An array of arguments to be partially applied.
|
||
|
|
* @param {Object} [rightIndicator] Used to indicate partially applying arguments from the right.
|
||
|
|
* @returns {Function} Returns the new bound function.
|
||
|
|
*/
|
||
|
|
function createBound(func, thisArg, partialArgs, rightIndicator) {
|
||
|
|
var isFunc = isFunction(func),
|
||
|
|
isPartial = !partialArgs,
|
||
|
|
key = thisArg;
|
||
|
|
|
||
|
|
// juggle arguments
|
||
|
|
if (isPartial) {
|
||
|
|
partialArgs = thisArg;
|
||
|
|
}
|
||
|
|
if (!isFunc) {
|
||
|
|
thisArg = func;
|
||
|
|
}
|
||
|
|
|
||
|
|
function bound() {
|
||
|
|
// `Function#bind` spec
|
||
|
|
// http://es5.github.com/#x15.3.4.5
|
||
|
|
var args = arguments,
|
||
|
|
thisBinding = isPartial ? this : thisArg;
|
||
|
|
|
||
|
|
if (!isFunc) {
|
||
|
|
func = thisArg[key];
|
||
|
|
}
|
||
|
|
if (partialArgs.length) {
|
||
|
|
args = args.length
|
||
|
|
? (args = slice(args), rightIndicator ? args.concat(partialArgs) : partialArgs.concat(args))
|
||
|
|
: partialArgs;
|
||
|
|
}
|
||
|
|
if (this instanceof bound) {
|
||
|
|
// ensure `new bound` is an instance of `bound` and `func`
|
||
|
|
noop.prototype = func.prototype;
|
||
|
|
thisBinding = new noop;
|
||
|
|
noop.prototype = null;
|
||
|
|
|
||
|
|
// mimic the constructor's `return` behavior
|
||
|
|
// http://es5.github.com/#x13.2.2
|
||
|
|
var result = func.apply(thisBinding, args);
|
||
|
|
return isObject(result) ? result : thisBinding;
|
||
|
|
}
|
||
|
|
return func.apply(thisBinding, args);
|
||
|
|
}
|
||
|
|
return bound;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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`.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Mixed} [func=identity] The value to convert to a callback.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of the created callback.
|
||
|
|
* @param {Number} [argCount=3] The number of arguments the callback accepts.
|
||
|
|
* @returns {Function} Returns a callback function.
|
||
|
|
*/
|
||
|
|
function createCallback(func, thisArg, argCount) {
|
||
|
|
if (func == null) {
|
||
|
|
return identity;
|
||
|
|
}
|
||
|
|
var type = typeof func;
|
||
|
|
if (type != 'function') {
|
||
|
|
if (type != 'object') {
|
||
|
|
return function(object) {
|
||
|
|
return object[func];
|
||
|
|
};
|
||
|
|
}
|
||
|
|
var props = keys(func);
|
||
|
|
return function(object) {
|
||
|
|
var length = props.length,
|
||
|
|
result = false;
|
||
|
|
while (length--) {
|
||
|
|
if (!(result = isEqual(object[props[length]], func[props[length]], indicatorObject))) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
if (typeof thisArg != 'undefined') {
|
||
|
|
if (argCount === 1) {
|
||
|
|
return function(value) {
|
||
|
|
return func.call(thisArg, value);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
if (argCount === 2) {
|
||
|
|
return function(a, b) {
|
||
|
|
return func.call(thisArg, a, b);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
if (argCount === 4) {
|
||
|
|
return function(accumulator, value, index, object) {
|
||
|
|
return func.call(thisArg, accumulator, value, index, object);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
return function(value, index, object) {
|
||
|
|
return func.call(thisArg, value, index, object);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
return func;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates compiled iteration functions.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Object} [options1, options2, ...] The compile options object(s).
|
||
|
|
* arrays - A string of code to determine if the iterable is an array or array-like.
|
||
|
|
* useHas - A boolean to specify using `hasOwnProperty` checks in the object loop.
|
||
|
|
* args - A string of comma separated arguments the iteration function will accept.
|
||
|
|
* top - A string of code to execute before the iteration branches.
|
||
|
|
* loop - A string of code to execute in the object loop.
|
||
|
|
* bottom - A string of code to execute after the iteration branches.
|
||
|
|
*
|
||
|
|
* @returns {Function} Returns the compiled function.
|
||
|
|
*/
|
||
|
|
function createIterator() {
|
||
|
|
var data = {
|
||
|
|
// support properties
|
||
|
|
'hasDontEnumBug': hasDontEnumBug,
|
||
|
|
'hasEnumPrototype': hasEnumPrototype,
|
||
|
|
'isKeysFast': isKeysFast,
|
||
|
|
'nonEnumArgs': nonEnumArgs,
|
||
|
|
'noCharByIndex': noCharByIndex,
|
||
|
|
'shadowed': shadowed,
|
||
|
|
|
||
|
|
// iterator options
|
||
|
|
'arrays': 'isArray(iterable)',
|
||
|
|
'bottom': '',
|
||
|
|
'loop': '',
|
||
|
|
'top': '',
|
||
|
|
'useHas': true
|
||
|
|
};
|
||
|
|
|
||
|
|
// merge options into a template data object
|
||
|
|
for (var object, index = 0; object = arguments[index]; index++) {
|
||
|
|
for (var key in object) {
|
||
|
|
data[key] = object[key];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
var args = data.args;
|
||
|
|
data.firstArg = /^[^,]+/.exec(args)[0];
|
||
|
|
|
||
|
|
// create the function factory
|
||
|
|
var factory = Function(
|
||
|
|
'createCallback, hasOwnProperty, isArguments, isArray, isString, ' +
|
||
|
|
'objectTypes, nativeKeys',
|
||
|
|
'return function(' + args + ') {\n' + iteratorTemplate(data) + '\n}'
|
||
|
|
);
|
||
|
|
// return the compiled function
|
||
|
|
return factory(
|
||
|
|
createCallback, hasOwnProperty, isArguments, isArray, isString,
|
||
|
|
objectTypes, nativeKeys
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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`.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @type Function
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function} [callback=identity] The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array|Object|String} Returns `collection`.
|
||
|
|
*/
|
||
|
|
var each = createIterator(eachIteratorOptions);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Used by `template` to escape characters for inclusion in compiled
|
||
|
|
* string literals.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {String} match The matched character to escape.
|
||
|
|
* @returns {String} Returns the escaped character.
|
||
|
|
*/
|
||
|
|
function escapeStringChar(match) {
|
||
|
|
return '\\' + stringEscapes[match];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Used by `escape` to convert characters to HTML entities.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {String} match The matched character to escape.
|
||
|
|
* @returns {String} Returns the escaped character.
|
||
|
|
*/
|
||
|
|
function escapeHtmlChar(match) {
|
||
|
|
return htmlEscapes[match];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a DOM node in IE < 9.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true` if the `value` is a DOM node, else `false`.
|
||
|
|
*/
|
||
|
|
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 no-operation function.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function noop() {
|
||
|
|
// no operation performed
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Slices the `collection` from the `start` index up to, but not including,
|
||
|
|
* the `end` index.
|
||
|
|
*
|
||
|
|
* 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|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 slice(array, start, end) {
|
||
|
|
start || (start = 0);
|
||
|
|
if (typeof end == 'undefined') {
|
||
|
|
end = array ? array.length : 0;
|
||
|
|
}
|
||
|
|
var index = -1,
|
||
|
|
length = end - start || 0,
|
||
|
|
result = Array(length < 0 ? 0 : length);
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
result[index] = array[start + index];
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Used by `unescape` to convert HTML entities to characters.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {String} match The matched character to unescape.
|
||
|
|
* @returns {String} Returns the unescaped character.
|
||
|
|
*/
|
||
|
|
function unescapeHtmlChar(match) {
|
||
|
|
return htmlUnescapes[match];
|
||
|
|
}
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is an `arguments` object.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is an `arguments` object, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* (function() { return _.isArguments(arguments); })(1, 2, 3);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isArguments([1, 2, 3]);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function isArguments(value) {
|
||
|
|
return toString.call(value) == argsClass;
|
||
|
|
}
|
||
|
|
// fallback for browsers that can't detect `arguments` objects by [[Class]]
|
||
|
|
if (noArgsClass) {
|
||
|
|
isArguments = function(value) {
|
||
|
|
return value ? hasOwnProperty.call(value, 'callee') : false;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Iterates over `object`'s own and inherited enumerable properties, 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 _
|
||
|
|
* @type Function
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to iterate over.
|
||
|
|
* @param {Function} [callback=identity] The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns `object`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* function Dog(name) {
|
||
|
|
* this.name = name;
|
||
|
|
* }
|
||
|
|
*
|
||
|
|
* Dog.prototype.bark = function() {
|
||
|
|
* alert('Woof, woof!');
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* _.forIn(new Dog('Dagny'), function(value, key) {
|
||
|
|
* alert(key);
|
||
|
|
* });
|
||
|
|
* // => alerts 'name' and 'bark' (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
var forIn = createIterator(eachIteratorOptions, forOwnIteratorOptions, {
|
||
|
|
'useHas': false
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Iterates over an object's own enumerable properties, 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 _
|
||
|
|
* @type Function
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to iterate over.
|
||
|
|
* @param {Function} [callback=identity] The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns `object`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.forOwn({ '0': 'zero', '1': 'one', 'length': 2 }, function(num, key) {
|
||
|
|
* alert(key);
|
||
|
|
* });
|
||
|
|
* // => alerts '0', '1', and 'length' (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
var forOwn = createIterator(eachIteratorOptions, forOwnIteratorOptions);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is an array.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is an array, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* (function() { return _.isArray(arguments); })();
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isArray([1, 2, 3]);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
var isArray = nativeIsArray || function(value) {
|
||
|
|
// `instanceof` may cause a memory leak in IE 7 if `value` is a host object
|
||
|
|
// http://ajaxian.com/archives/working-aroung-the-instanceof-memory-leak
|
||
|
|
return (argsAreObjects && value instanceof Array) || toString.call(value) == arrayClass;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array composed of the own enumerable property names of `object`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to inspect.
|
||
|
|
* @returns {Array} Returns a new array of property names.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.keys({ 'one': 1, 'two': 2, 'three': 3 });
|
||
|
|
* // => ['one', 'two', 'three'] (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
var keys = !nativeKeys ? shimKeys : function(object) {
|
||
|
|
if (!isObject(object)) {
|
||
|
|
return [];
|
||
|
|
}
|
||
|
|
if ((hasEnumPrototype && typeof object == 'function') ||
|
||
|
|
(nonEnumArgs && object.length && isArguments(object))) {
|
||
|
|
return shimKeys(object);
|
||
|
|
}
|
||
|
|
return nativeKeys(object);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A fallback implementation of `isPlainObject` that 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.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if `value` is a plain object, else `false`.
|
||
|
|
*/
|
||
|
|
function shimIsPlainObject(value) {
|
||
|
|
// avoid non-objects and false positives for `arguments` objects
|
||
|
|
var result = false;
|
||
|
|
if (!(value && typeof value == 'object') || isArguments(value)) {
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
// check that the constructor is `Object` (i.e. `Object instanceof Object`)
|
||
|
|
var ctor = value.constructor;
|
||
|
|
if ((!isFunction(ctor) && (!noNodeClass || !isNode(value))) || ctor instanceof ctor) {
|
||
|
|
// 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 (iteratesOwnLast) {
|
||
|
|
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 result === false || hasOwnProperty.call(value, result);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A fallback implementation of `Object.keys` that produces an array of the
|
||
|
|
* given object's own enumerable property names.
|
||
|
|
*
|
||
|
|
* @private
|
||
|
|
* @param {Object} object The object to inspect.
|
||
|
|
* @returns {Array} Returns a new array of property names.
|
||
|
|
*/
|
||
|
|
function shimKeys(object) {
|
||
|
|
var result = [];
|
||
|
|
forOwn(object, function(value, key) {
|
||
|
|
result.push(key);
|
||
|
|
});
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Used to convert characters to HTML entities:
|
||
|
|
*
|
||
|
|
* 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")
|
||
|
|
*/
|
||
|
|
var htmlEscapes = {
|
||
|
|
'&': '&',
|
||
|
|
'<': '<',
|
||
|
|
'>': '>',
|
||
|
|
'"': '"',
|
||
|
|
"'": '''
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Used to convert HTML entities to characters */
|
||
|
|
var htmlUnescapes = invert(htmlEscapes);
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Assigns own enumerable properties of source object(s) to the destination
|
||
|
|
* object. Subsequent sources will overwrite propery assignments of previous
|
||
|
|
* sources. If a `callback` function is passed, it will be executed to produce
|
||
|
|
* the assigned values. The `callback` is bound to `thisArg` and invoked with
|
||
|
|
* two arguments; (objectValue, sourceValue).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @type Function
|
||
|
|
* @alias extend
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The destination object.
|
||
|
|
* @param {Object} [source1, source2, ...] The source objects.
|
||
|
|
* @param {Function} [callback] The function to customize assigning values.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns the destination object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.assign({ 'name': 'moe' }, { 'age': 40 });
|
||
|
|
* // => { 'name': 'moe', 'age': 40 }
|
||
|
|
*
|
||
|
|
* var defaults = _.partialRight(_.assign, function(a, b) {
|
||
|
|
* return typeof a == 'undefined' ? b : a;
|
||
|
|
* });
|
||
|
|
*
|
||
|
|
* var food = { 'name': 'apple' };
|
||
|
|
* defaults(food, { 'name': 'banana', 'type': 'fruit' });
|
||
|
|
* // => { 'name': 'apple', 'type': 'fruit' }
|
||
|
|
*/
|
||
|
|
var assign = createIterator(defaultsIteratorOptions, {
|
||
|
|
'top':
|
||
|
|
defaultsIteratorOptions.top.replace(';',
|
||
|
|
';\n' +
|
||
|
|
"if (argsLength > 3 && typeof args[argsLength - 2] == 'function') {\n" +
|
||
|
|
' var callback = createCallback(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]'
|
||
|
|
});
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a clone of `value`. If `deep` is `true`, nested objects will also
|
||
|
|
* be cloned, otherwise they will be assigned by reference. If a `callback`
|
||
|
|
* function is passed, it will be executed to produce the cloned values. If
|
||
|
|
* `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 Objects
|
||
|
|
* @param {Mixed} value The value to clone.
|
||
|
|
* @param {Boolean} [deep=false] A flag to indicate a deep clone.
|
||
|
|
* @param {Function} [callback] The function to customize cloning values.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @param- {Array} [stackA=[]] Internally used to track traversed source objects.
|
||
|
|
* @param- {Array} [stackB=[]] Internally used to associate clones with source counterparts.
|
||
|
|
* @returns {Mixed} Returns the cloned `value`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* var shallow = _.clone(stooges);
|
||
|
|
* shallow[0] === stooges[0];
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* var deep = _.clone(stooges, true);
|
||
|
|
* deep[0] === stooges[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 clone(value, deep, callback, thisArg, stackA, stackB) {
|
||
|
|
var result = value;
|
||
|
|
|
||
|
|
// allows working with "Collections" methods without using their `callback`
|
||
|
|
// argument, `index|key`, for this method's `callback`
|
||
|
|
if (typeof deep == 'function') {
|
||
|
|
thisArg = callback;
|
||
|
|
callback = deep;
|
||
|
|
deep = false;
|
||
|
|
}
|
||
|
|
if (typeof callback == 'function') {
|
||
|
|
callback = typeof thisArg == 'undefined' ? callback : createCallback(callback, thisArg, 1);
|
||
|
|
result = callback(result);
|
||
|
|
|
||
|
|
var done = typeof result != 'undefined';
|
||
|
|
if (!done) {
|
||
|
|
result = value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// inspect [[Class]]
|
||
|
|
var isObj = isObject(result);
|
||
|
|
if (isObj) {
|
||
|
|
var className = toString.call(result);
|
||
|
|
if (!cloneableClasses[className] || (noNodeClass && isNode(result))) {
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
var isArr = isArray(result);
|
||
|
|
}
|
||
|
|
// shallow clone
|
||
|
|
if (!isObj || !deep) {
|
||
|
|
return isObj && !done
|
||
|
|
? (isArr ? slice(result) : assign({}, result))
|
||
|
|
: result;
|
||
|
|
}
|
||
|
|
var ctor = ctorByClass[className];
|
||
|
|
switch (className) {
|
||
|
|
case boolClass:
|
||
|
|
case dateClass:
|
||
|
|
return done ? result : new ctor(+result);
|
||
|
|
|
||
|
|
case numberClass:
|
||
|
|
case stringClass:
|
||
|
|
return done ? result : new ctor(result);
|
||
|
|
|
||
|
|
case regexpClass:
|
||
|
|
return done ? result : ctor(result.source, reFlags.exec(result));
|
||
|
|
}
|
||
|
|
// check for circular references and return corresponding clone
|
||
|
|
stackA || (stackA = []);
|
||
|
|
stackB || (stackB = []);
|
||
|
|
|
||
|
|
var length = stackA.length;
|
||
|
|
while (length--) {
|
||
|
|
if (stackA[length] == value) {
|
||
|
|
return stackB[length];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// init cloned object
|
||
|
|
if (!done) {
|
||
|
|
result = isArr ? ctor(result.length) : {};
|
||
|
|
|
||
|
|
// 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;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// 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 ? forEach : forOwn)(done ? result : value, function(objValue, key) {
|
||
|
|
result[key] = clone(objValue, deep, callback, undefined, stackA, stackB);
|
||
|
|
});
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a deep clone of `value`. If a `callback` function is passed, it will
|
||
|
|
* be executed to produce the cloned values. If `callback` returns the value it
|
||
|
|
* was passed, cloning will be handled by the method instead. The `callback` is
|
||
|
|
* bound to `thisArg` and invoked with one argument; (value).
|
||
|
|
*
|
||
|
|
* Note: This function 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 Objects
|
||
|
|
* @param {Mixed} value The value to deep clone.
|
||
|
|
* @param {Function} [callback] The function to customize cloning values.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the deep cloned `value`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* var deep = _.cloneDeep(stooges);
|
||
|
|
* deep[0] === stooges[0];
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* var view = {
|
||
|
|
* 'label': 'docs',
|
||
|
|
* 'node': element
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* var clone = _.cloneDeep(view, function(value) {
|
||
|
|
* return _.isElement(value) ? value.cloneNode(true) : value;
|
||
|
|
* });
|
||
|
|
*
|
||
|
|
* clone.node == view.node;
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function cloneDeep(value, callback, thisArg) {
|
||
|
|
return clone(value, true, callback, thisArg);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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 _
|
||
|
|
* @type Function
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The destination object.
|
||
|
|
* @param {Object} [source1, source2, ...] The source objects.
|
||
|
|
* @param- {Object} [guard] Internally used to allow working with `_.reduce`
|
||
|
|
* without using its callback's `key` and `object` arguments as sources.
|
||
|
|
* @returns {Object} Returns the destination object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var food = { 'name': 'apple' };
|
||
|
|
* _.defaults(food, { 'name': 'banana', 'type': 'fruit' });
|
||
|
|
* // => { 'name': 'apple', 'type': 'fruit' }
|
||
|
|
*/
|
||
|
|
var defaults = createIterator(defaultsIteratorOptions);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a sorted array of all enumerable properties, own and inherited,
|
||
|
|
* of `object` that have function values.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias methods
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to inspect.
|
||
|
|
* @returns {Array} Returns a new array of property names that have function values.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.functions(_);
|
||
|
|
* // => ['all', 'any', 'bind', 'bindAll', 'clone', 'compact', 'compose', ...]
|
||
|
|
*/
|
||
|
|
function functions(object) {
|
||
|
|
var result = [];
|
||
|
|
forIn(object, function(value, key) {
|
||
|
|
if (isFunction(value)) {
|
||
|
|
result.push(key);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
return result.sort();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if the specified object `property` exists and is a direct property,
|
||
|
|
* instead of an inherited property.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to check.
|
||
|
|
* @param {String} property The property to check for.
|
||
|
|
* @returns {Boolean} Returns `true` if key is a direct property, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b');
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function has(object, property) {
|
||
|
|
return object ? hasOwnProperty.call(object, property) : false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an object composed of the inverted keys and values of the given `object`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to invert.
|
||
|
|
* @returns {Object} Returns the created inverted object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.invert({ 'first': 'moe', 'second': 'larry' });
|
||
|
|
* // => { 'moe': 'first', 'larry': 'second' } (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
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 a boolean value.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is a boolean value, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isBoolean(null);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function isBoolean(value) {
|
||
|
|
return value === true || value === false || toString.call(value) == boolClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a date.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is a date, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isDate(new Date);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isDate(value) {
|
||
|
|
return value instanceof Date || toString.call(value) == dateClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a DOM element.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is a DOM element, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isElement(document.body);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isElement(value) {
|
||
|
|
return value ? value.nodeType === 1 : false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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 Objects
|
||
|
|
* @param {Array|Object|String} value The value to inspect.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is empty, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isEmpty([1, 2, 3]);
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isEmpty({});
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isEmpty('');
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isEmpty(value) {
|
||
|
|
var result = true;
|
||
|
|
if (!value) {
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
var className = toString.call(value),
|
||
|
|
length = value.length;
|
||
|
|
|
||
|
|
if ((className == arrayClass || className == stringClass ||
|
||
|
|
className == argsClass || (noArgsClass && isArguments(value))) ||
|
||
|
|
(className == objectClass && typeof length == 'number' && isFunction(value.splice))) {
|
||
|
|
return !length;
|
||
|
|
}
|
||
|
|
forOwn(value, function() {
|
||
|
|
return (result = false);
|
||
|
|
});
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Performs a deep comparison between two values to determine if they are
|
||
|
|
* equivalent to each other. If `callback` is passed, it will be executed to
|
||
|
|
* compare values. If `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 Objects
|
||
|
|
* @param {Mixed} a The value to compare.
|
||
|
|
* @param {Mixed} b The other value to compare.
|
||
|
|
* @param {Function} [callback] The function to customize comparing values.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @param- {Object} [stackA=[]] Internally used track traversed `a` objects.
|
||
|
|
* @param- {Object} [stackB=[]] Internally used track traversed `b` objects.
|
||
|
|
* @returns {Boolean} Returns `true`, if the values are equvalent, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var moe = { 'name': 'moe', 'age': 40 };
|
||
|
|
* var copy = { 'name': 'moe', 'age': 40 };
|
||
|
|
*
|
||
|
|
* moe == copy;
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isEqual(moe, copy);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* var words = ['hello', 'goodbye'];
|
||
|
|
* var otherWords = ['hi', 'goodbye'];
|
||
|
|
*
|
||
|
|
* _.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 isEqual(a, b, callback, thisArg, stackA, stackB) {
|
||
|
|
// used to indicate that when comparing objects, `a` has at least the properties of `b`
|
||
|
|
var whereIndicator = callback === indicatorObject;
|
||
|
|
if (callback && !whereIndicator) {
|
||
|
|
callback = typeof thisArg == 'undefined' ? callback : createCallback(callback, thisArg, 2);
|
||
|
|
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 || (type != 'function' && type != 'object')) &&
|
||
|
|
(!b || (otherType != 'function' && otherType != 'object'))) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
// exit early for `null` and `undefined`, avoiding ES3's Function#call behavior
|
||
|
|
// http://es5.github.com/#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.com/#x15.10.6.4)
|
||
|
|
// treat string primitives and their corresponding object instances as equal
|
||
|
|
return a == b + '';
|
||
|
|
}
|
||
|
|
var isArr = className == arrayClass;
|
||
|
|
if (!isArr) {
|
||
|
|
// unwrap any `lodash` wrapped values
|
||
|
|
if (a.__wrapped__ || b.__wrapped__) {
|
||
|
|
return isEqual(a.__wrapped__ || a, b.__wrapped__ || b, callback, thisArg, stackA, stackB);
|
||
|
|
}
|
||
|
|
// exit for functions and DOM nodes
|
||
|
|
if (className != objectClass || (noNodeClass && (isNode(a) || isNode(b)))) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
// in older versions of Opera, `arguments` objects have `Array` constructors
|
||
|
|
var ctorA = !argsAreObjects && isArguments(a) ? Object : a.constructor,
|
||
|
|
ctorB = !argsAreObjects && 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
|
||
|
|
)) {
|
||
|
|
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.com/#x15.12.3)
|
||
|
|
stackA || (stackA = []);
|
||
|
|
stackB || (stackB = []);
|
||
|
|
|
||
|
|
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) {
|
||
|
|
length = a.length;
|
||
|
|
size = b.length;
|
||
|
|
|
||
|
|
// compare lengths to determine if a deep comparison is necessary
|
||
|
|
result = size == a.length;
|
||
|
|
if (!result && !whereIndicator) {
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
// deep compare the contents, ignoring non-numeric properties
|
||
|
|
while (size--) {
|
||
|
|
var index = length,
|
||
|
|
value = b[size];
|
||
|
|
|
||
|
|
if (whereIndicator) {
|
||
|
|
while (index--) {
|
||
|
|
if ((result = isEqual(a[index], value, callback, thisArg, stackA, stackB))) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else if (!(result = isEqual(a[size], value, callback, thisArg, stackA, stackB))) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
// 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) && isEqual(a[key], value, callback, thisArg, stackA, stackB));
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
if (result && !whereIndicator) {
|
||
|
|
// 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);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is, or can be coerced to, a finite number.
|
||
|
|
*
|
||
|
|
* Note: This is not the same as native `isFinite`, which will return true for
|
||
|
|
* booleans and empty strings. See http://es5.github.com/#x15.1.2.5.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is finite, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isFinite(-101);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isFinite('10');
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isFinite(true);
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isFinite('');
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isFinite(Infinity);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function isFinite(value) {
|
||
|
|
return nativeIsFinite(value) && !nativeIsNaN(parseFloat(value));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a function.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is a function, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isFunction(_);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isFunction(value) {
|
||
|
|
return typeof value == 'function';
|
||
|
|
}
|
||
|
|
// fallback for older versions of Chrome and Safari
|
||
|
|
if (isFunction(/x/)) {
|
||
|
|
isFunction = function(value) {
|
||
|
|
return value instanceof Function || toString.call(value) == funcClass;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is the language type of Object.
|
||
|
|
* (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is an object, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isObject({});
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isObject([1, 2, 3]);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isObject(1);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function isObject(value) {
|
||
|
|
// check if the value is the ECMAScript language type of Object
|
||
|
|
// http://es5.github.com/#x8
|
||
|
|
// and avoid a V8 bug
|
||
|
|
// http://code.google.com/p/v8/issues/detail?id=2291
|
||
|
|
return value ? objectTypes[typeof value] : false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is `NaN`.
|
||
|
|
*
|
||
|
|
* Note: This is not the same as native `isNaN`, which will return `true` for
|
||
|
|
* `undefined` and other values. See http://es5.github.com/#x15.1.2.4.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is `NaN`, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isNaN(NaN);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isNaN(new Number(NaN));
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* isNaN(undefined);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isNaN(undefined);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
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
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is `null`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is `null`, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isNull(null);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.isNull(undefined);
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function isNull(value) {
|
||
|
|
return value === null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a number.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is a number, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isNumber(8.4 * 5);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isNumber(value) {
|
||
|
|
return typeof value == 'number' || toString.call(value) == numberClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if a given `value` is an object created by the `Object` constructor.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if `value` is a plain object, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* function Stooge(name, age) {
|
||
|
|
* this.name = name;
|
||
|
|
* this.age = age;
|
||
|
|
* }
|
||
|
|
*
|
||
|
|
* _.isPlainObject(new Stooge('moe', 40));
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isPlainObject([1, 2, 3]);
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.isPlainObject({ 'name': 'moe', 'age': 40 });
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
var isPlainObject = !getPrototypeOf ? shimIsPlainObject : function(value) {
|
||
|
|
if (!(value && typeof value == 'object')) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
var valueOf = value.valueOf,
|
||
|
|
objProto = typeof valueOf == 'function' && (objProto = getPrototypeOf(valueOf)) && getPrototypeOf(objProto);
|
||
|
|
|
||
|
|
return objProto
|
||
|
|
? value == objProto || (getPrototypeOf(value) == objProto && !isArguments(value))
|
||
|
|
: shimIsPlainObject(value);
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a regular expression.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is a regular expression, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isRegExp(/moe/);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isRegExp(value) {
|
||
|
|
return value instanceof RegExp || toString.call(value) == regexpClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is a string.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is a string, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isString('moe');
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isString(value) {
|
||
|
|
return typeof value == 'string' || toString.call(value) == stringClass;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if `value` is `undefined`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Mixed} value The value to check.
|
||
|
|
* @returns {Boolean} Returns `true`, if the `value` is `undefined`, else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.isUndefined(void 0);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function isUndefined(value) {
|
||
|
|
return typeof value == 'undefined';
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Recursively merges own enumerable properties of the source object(s), that
|
||
|
|
* don't resolve to `undefined`, into the destination object. Subsequent sources
|
||
|
|
* will overwrite propery assignments of previous sources. If a `callback` function
|
||
|
|
* is passed, it will be executed to produce the merged values of the destination
|
||
|
|
* and source properties. If `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 Objects
|
||
|
|
* @param {Object} object The destination object.
|
||
|
|
* @param {Object} [source1, source2, ...] The source objects.
|
||
|
|
* @param {Function} [callback] The function to customize merging properties.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @param- {Object} [deepIndicator] Internally used to indicate that `stackA`
|
||
|
|
* and `stackB` are arrays of traversed objects instead of source objects.
|
||
|
|
* @param- {Array} [stackA=[]] Internally used to track traversed source objects.
|
||
|
|
* @param- {Array} [stackB=[]] Internally used to associate values with their
|
||
|
|
* source counterparts.
|
||
|
|
* @returns {Object} Returns the destination object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var names = {
|
||
|
|
* 'stooges': [
|
||
|
|
* { 'name': 'moe' },
|
||
|
|
* { 'name': 'larry' }
|
||
|
|
* ]
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* var ages = {
|
||
|
|
* 'stooges': [
|
||
|
|
* { 'age': 40 },
|
||
|
|
* { 'age': 50 }
|
||
|
|
* ]
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* _.merge(names, ages);
|
||
|
|
* // => { 'stooges': [{ 'name': 'moe', 'age': 40 }, { 'name': 'larry', 'age': 50 }] }
|
||
|
|
*
|
||
|
|
* var food = {
|
||
|
|
* 'fruits': ['apple'],
|
||
|
|
* 'vegetables': ['beet']
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* 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 merge(object, source, deepIndicator) {
|
||
|
|
var args = arguments,
|
||
|
|
index = 0,
|
||
|
|
length = 2;
|
||
|
|
|
||
|
|
if (!isObject(object)) {
|
||
|
|
return object;
|
||
|
|
}
|
||
|
|
if (deepIndicator === indicatorObject) {
|
||
|
|
var callback = args[3],
|
||
|
|
stackA = args[4],
|
||
|
|
stackB = args[5];
|
||
|
|
} else {
|
||
|
|
stackA = [];
|
||
|
|
stackB = [];
|
||
|
|
|
||
|
|
// allows working with `_.reduce` and `_.reduceRight` without
|
||
|
|
// using their `callback` arguments, `index|key` and `collection`
|
||
|
|
if (typeof deepIndicator != 'number') {
|
||
|
|
length = args.length;
|
||
|
|
}
|
||
|
|
if (length > 3 && typeof args[length - 2] == 'function') {
|
||
|
|
callback = createCallback(args[--length - 1], args[length--], 2);
|
||
|
|
} else if (length > 2 && typeof args[length - 1] == 'function') {
|
||
|
|
callback = args[--length];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
while (++index < length) {
|
||
|
|
(isArray(args[index]) ? forEach : forOwn)(args[index], 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) {
|
||
|
|
value = isArr
|
||
|
|
? (isArray(value) ? value : [])
|
||
|
|
: (isPlainObject(value) ? value : {});
|
||
|
|
|
||
|
|
if (callback) {
|
||
|
|
result = callback(value, source);
|
||
|
|
if (typeof result != 'undefined') {
|
||
|
|
value = result;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// add `source` and associated `value` to the stack of traversed objects
|
||
|
|
stackA.push(source);
|
||
|
|
stackB.push(value);
|
||
|
|
|
||
|
|
// recursively merge objects and arrays (susceptible to call stack limits)
|
||
|
|
if (!callback) {
|
||
|
|
value = merge(value, source, indicatorObject, 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;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return 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` function is passed, it will be executed
|
||
|
|
* for each property in the `object`, omitting the properties `callback`
|
||
|
|
* returns truthy for. The `callback` is bound to `thisArg` and invoked
|
||
|
|
* with three arguments; (value, key, object).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The source object.
|
||
|
|
* @param {Function|String} callback|[prop1, prop2, ...] The properties to omit
|
||
|
|
* or the function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns an object without the omitted properties.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.omit({ 'name': 'moe', 'age': 40 }, 'age');
|
||
|
|
* // => { 'name': 'moe' }
|
||
|
|
*
|
||
|
|
* _.omit({ 'name': 'moe', 'age': 40 }, function(value) {
|
||
|
|
* return typeof value == 'number';
|
||
|
|
* });
|
||
|
|
* // => { 'name': 'moe' }
|
||
|
|
*/
|
||
|
|
function omit(object, callback, thisArg) {
|
||
|
|
var isFunc = typeof callback == 'function',
|
||
|
|
result = {};
|
||
|
|
|
||
|
|
if (isFunc) {
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
} else {
|
||
|
|
var props = concat.apply(arrayRef, arguments);
|
||
|
|
}
|
||
|
|
forIn(object, function(value, key, object) {
|
||
|
|
if (isFunc
|
||
|
|
? !callback(value, key, object)
|
||
|
|
: indexOf(props, key, 1) < 0
|
||
|
|
) {
|
||
|
|
result[key] = value;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a two dimensional array of the given object's key-value pairs,
|
||
|
|
* i.e. `[[key1, value1], [key2, value2]]`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to inspect.
|
||
|
|
* @returns {Array} Returns new array of key-value pairs.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.pairs({ 'moe': 30, 'larry': 40 });
|
||
|
|
* // => [['moe', 30], ['larry', 40]] (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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 `callback` is passed, it will be executed for each property in the
|
||
|
|
* `object`, picking the properties `callback` returns truthy for. The `callback`
|
||
|
|
* is bound to `thisArg` and invoked with three arguments; (value, key, object).
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The source object.
|
||
|
|
* @param {Array|Function|String} callback|[prop1, prop2, ...] The function called
|
||
|
|
* per iteration or properties to pick, either as individual arguments or arrays.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns an object composed of the picked properties.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.pick({ 'name': 'moe', '_userid': 'moe1' }, 'name');
|
||
|
|
* // => { 'name': 'moe' }
|
||
|
|
*
|
||
|
|
* _.pick({ 'name': 'moe', '_userid': 'moe1' }, function(value, key) {
|
||
|
|
* return key.charAt(0) != '_';
|
||
|
|
* });
|
||
|
|
* // => { 'name': 'moe' }
|
||
|
|
*/
|
||
|
|
function pick(object, callback, thisArg) {
|
||
|
|
var result = {};
|
||
|
|
if (typeof callback != 'function') {
|
||
|
|
var index = 0,
|
||
|
|
props = concat.apply(arrayRef, arguments),
|
||
|
|
length = isObject(object) ? props.length : 0;
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var key = props[index];
|
||
|
|
if (key in object) {
|
||
|
|
result[key] = object[key];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
forIn(object, function(value, key, object) {
|
||
|
|
if (callback(value, key, object)) {
|
||
|
|
result[key] = value;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array composed of the own enumerable property values of `object`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Objects
|
||
|
|
* @param {Object} object The object to inspect.
|
||
|
|
* @returns {Array} Returns a new array of property values.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.values({ 'one': 1, 'two': 2, 'three': 3 });
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*/
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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 Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Array|Number|String} [index1, index2, ...] The indexes of
|
||
|
|
* `collection` to retrieve, either as individual arguments or arrays.
|
||
|
|
* @returns {Array} Returns a new array of elements corresponding to the
|
||
|
|
* provided indexes.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.at(['a', 'b', 'c', 'd', 'e'], [0, 2, 4]);
|
||
|
|
* // => ['a', 'c', 'e']
|
||
|
|
*
|
||
|
|
* _.at(['moe', 'larry', 'curly'], 0, 2);
|
||
|
|
* // => ['moe', 'curly']
|
||
|
|
*/
|
||
|
|
function at(collection) {
|
||
|
|
var index = -1,
|
||
|
|
props = concat.apply(arrayRef, slice(arguments, 1)),
|
||
|
|
length = props.length,
|
||
|
|
result = Array(length);
|
||
|
|
|
||
|
|
if (noCharByIndex && isString(collection)) {
|
||
|
|
collection = collection.split('');
|
||
|
|
}
|
||
|
|
while(++index < length) {
|
||
|
|
result[index] = collection[props[index]];
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if a given `target` element 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 _
|
||
|
|
* @alias include
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Mixed} 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
|
||
|
|
*
|
||
|
|
* _.contains([1, 2, 3], 1);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.contains([1, 2, 3], 1, 2);
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* _.contains({ 'name': 'moe', 'age': 40 }, 'moe');
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* _.contains('curly', 'ur');
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function contains(collection, target, fromIndex) {
|
||
|
|
var index = -1,
|
||
|
|
length = collection ? collection.length : 0,
|
||
|
|
result = false;
|
||
|
|
|
||
|
|
fromIndex = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex) || 0;
|
||
|
|
if (typeof length == 'number') {
|
||
|
|
result = (isString(collection)
|
||
|
|
? collection.indexOf(target, fromIndex)
|
||
|
|
: indexOf(collection, target, fromIndex)
|
||
|
|
) > -1;
|
||
|
|
} else {
|
||
|
|
each(collection, function(value) {
|
||
|
|
if (++index >= fromIndex) {
|
||
|
|
return !(result = value === target);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an object composed of keys returned from running each element of the
|
||
|
|
* `collection` through the given `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 passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @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 passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns the composed aggregate object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.countBy([4.3, 6.1, 6.4], function(num) { return Math.floor(num); });
|
||
|
|
* // => { '4': 1, '6': 2 }
|
||
|
|
*
|
||
|
|
* _.countBy([4.3, 6.1, 6.4], function(num) { return this.floor(num); }, Math);
|
||
|
|
* // => { '4': 1, '6': 2 }
|
||
|
|
*
|
||
|
|
* _.countBy(['one', 'two', 'three'], 'length');
|
||
|
|
* // => { '3': 2, '5': 1 }
|
||
|
|
*/
|
||
|
|
function countBy(collection, callback, thisArg) {
|
||
|
|
var result = {};
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
|
||
|
|
forEach(collection, function(value, key, collection) {
|
||
|
|
key = callback(value, key, collection) + '';
|
||
|
|
(hasOwnProperty.call(result, key) ? result[key]++ : result[key] = 1);
|
||
|
|
});
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if the `callback` returns a truthy 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 passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @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 passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Boolean} Returns `true` if all elements pass the callback check,
|
||
|
|
* else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.every([true, 1, null, 'yes'], Boolean);
|
||
|
|
* // => false
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.every(stooges, 'age');
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* // using "_.where" callback shorthand
|
||
|
|
* _.every(stooges, { 'age': 50 });
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function every(collection, callback, thisArg) {
|
||
|
|
var result = true;
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
|
||
|
|
if (isArray(collection)) {
|
||
|
|
var index = -1,
|
||
|
|
length = collection.length;
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
if (!(result = !!callback(collection[index], index, collection))) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
each(collection, function(value, index, collection) {
|
||
|
|
return (result = !!callback(value, index, collection));
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Examines each element in a `collection`, returning an array of all elements
|
||
|
|
* the `callback` returns truthy for. The `callback` is bound to `thisArg` and
|
||
|
|
* invoked with three arguments; (value, index|key, collection).
|
||
|
|
*
|
||
|
|
* If a property name is passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @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 passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a new array of elements that passed the callback check.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var evens = _.filter([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
|
||
|
|
* // => [2, 4, 6]
|
||
|
|
*
|
||
|
|
* var food = [
|
||
|
|
* { 'name': 'apple', 'organic': false, 'type': 'fruit' },
|
||
|
|
* { 'name': 'carrot', 'organic': true, 'type': 'vegetable' }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.filter(food, 'organic');
|
||
|
|
* // => [{ 'name': 'carrot', 'organic': true, 'type': 'vegetable' }]
|
||
|
|
*
|
||
|
|
* // using "_.where" callback shorthand
|
||
|
|
* _.filter(food, { 'type': 'fruit' });
|
||
|
|
* // => [{ 'name': 'apple', 'organic': false, 'type': 'fruit' }]
|
||
|
|
*/
|
||
|
|
function filter(collection, callback, thisArg) {
|
||
|
|
var result = [];
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
|
||
|
|
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 {
|
||
|
|
each(collection, function(value, index, collection) {
|
||
|
|
if (callback(value, index, collection)) {
|
||
|
|
result.push(value);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Examines each element in a `collection`, returning the first that the `callback`
|
||
|
|
* returns truthy for. The `callback` is bound to `thisArg` and invoked with three
|
||
|
|
* arguments; (value, index|key, collection).
|
||
|
|
*
|
||
|
|
* If a property name is passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias detect
|
||
|
|
* @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 passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the element that passed the callback check,
|
||
|
|
* else `undefined`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var even = _.find([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
|
||
|
|
* // => 2
|
||
|
|
*
|
||
|
|
* var food = [
|
||
|
|
* { 'name': 'apple', 'organic': false, 'type': 'fruit' },
|
||
|
|
* { 'name': 'banana', 'organic': true, 'type': 'fruit' },
|
||
|
|
* { 'name': 'beet', 'organic': false, 'type': 'vegetable' },
|
||
|
|
* { 'name': 'carrot', 'organic': true, 'type': 'vegetable' }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.where" callback shorthand
|
||
|
|
* var veggie = _.find(food, { 'type': 'vegetable' });
|
||
|
|
* // => { 'name': 'beet', 'organic': false, 'type': 'vegetable' }
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* var healthy = _.find(food, 'organic');
|
||
|
|
* // => { 'name': 'banana', 'organic': true, 'type': 'fruit' }
|
||
|
|
*/
|
||
|
|
function find(collection, callback, thisArg) {
|
||
|
|
var result;
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
|
||
|
|
forEach(collection, function(value, index, collection) {
|
||
|
|
if (callback(value, index, collection)) {
|
||
|
|
result = value;
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Iterates over a `collection`, 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`.
|
||
|
|
*
|
||
|
|
* @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 {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array|Object|String} Returns `collection`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _([1, 2, 3]).forEach(alert).join(',');
|
||
|
|
* // => alerts each number and returns '1,2,3'
|
||
|
|
*
|
||
|
|
* _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, alert);
|
||
|
|
* // => alerts each number value (order is not guaranteed)
|
||
|
|
*/
|
||
|
|
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 {
|
||
|
|
each(collection, callback, thisArg);
|
||
|
|
}
|
||
|
|
return collection;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an object composed of keys returned from running each element of the
|
||
|
|
* `collection` through the `callback`. The corresponding value of each key is
|
||
|
|
* an array of elements passed to `callback` that returned the key. The `callback`
|
||
|
|
* is bound to `thisArg` and invoked with three arguments; (value, index|key, collection).
|
||
|
|
*
|
||
|
|
* If a property name is passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @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 passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Object} Returns the composed aggregate object.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.groupBy([4.2, 6.1, 6.4], function(num) { return Math.floor(num); });
|
||
|
|
* // => { '4': [4.2], '6': [6.1, 6.4] }
|
||
|
|
*
|
||
|
|
* _.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'] }
|
||
|
|
*/
|
||
|
|
function groupBy(collection, callback, thisArg) {
|
||
|
|
var result = {};
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
|
||
|
|
forEach(collection, function(value, key, collection) {
|
||
|
|
key = callback(value, key, collection) + '';
|
||
|
|
(hasOwnProperty.call(result, key) ? result[key] : result[key] = []).push(value);
|
||
|
|
});
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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 passed 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 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 {Mixed} [arg1, arg2, ...] Arguments to invoke the method with.
|
||
|
|
* @returns {Array} Returns a new array of the results of each invoked method.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.invoke([[5, 1, 7], [3, 2, 1]], 'sort');
|
||
|
|
* // => [[1, 5, 7], [1, 2, 3]]
|
||
|
|
*
|
||
|
|
* _.invoke([123, 456], String.prototype.split, '');
|
||
|
|
* // => [['1', '2', '3'], ['4', '5', '6']]
|
||
|
|
*/
|
||
|
|
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 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).
|
||
|
|
*
|
||
|
|
* If a property name is passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @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 passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a new array of the results of each `callback` execution.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.map([1, 2, 3], function(num) { return num * 3; });
|
||
|
|
* // => [3, 6, 9]
|
||
|
|
*
|
||
|
|
* _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(num) { return num * 3; });
|
||
|
|
* // => [3, 6, 9] (order is not guaranteed)
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.map(stooges, 'name');
|
||
|
|
* // => ['moe', 'larry']
|
||
|
|
*/
|
||
|
|
function map(collection, callback, thisArg) {
|
||
|
|
var index = -1,
|
||
|
|
length = collection ? collection.length : 0,
|
||
|
|
result = Array(typeof length == 'number' ? length : 0);
|
||
|
|
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
if (isArray(collection)) {
|
||
|
|
while (++index < length) {
|
||
|
|
result[index] = callback(collection[index], index, collection);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
each(collection, function(value, key, collection) {
|
||
|
|
result[++index] = callback(value, key, collection);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves the maximum value of an `array`. If `callback` is passed,
|
||
|
|
* it will be executed for each value in the `array` 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 passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @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 passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the maximum value.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.max([4, 2, 8, 6]);
|
||
|
|
* // => 8
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* _.max(stooges, function(stooge) { return stooge.age; });
|
||
|
|
* // => { 'name': 'larry', 'age': 50 };
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.max(stooges, 'age');
|
||
|
|
* // => { 'name': 'larry', 'age': 50 };
|
||
|
|
*/
|
||
|
|
function max(collection, callback, thisArg) {
|
||
|
|
var computed = -Infinity,
|
||
|
|
result = computed;
|
||
|
|
|
||
|
|
if (!callback && isArray(collection)) {
|
||
|
|
var index = -1,
|
||
|
|
length = collection.length;
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var value = collection[index];
|
||
|
|
if (value > result) {
|
||
|
|
result = value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
callback = !callback && isString(collection)
|
||
|
|
? charAtCallback
|
||
|
|
: createCallback(callback, thisArg);
|
||
|
|
|
||
|
|
each(collection, function(value, index, collection) {
|
||
|
|
var current = callback(value, index, collection);
|
||
|
|
if (current > computed) {
|
||
|
|
computed = current;
|
||
|
|
result = value;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves the minimum value of an `array`. If `callback` is passed,
|
||
|
|
* it will be executed for each value in the `array` 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 passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @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 passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the minimum value.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.min([4, 2, 8, 6]);
|
||
|
|
* // => 2
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* _.min(stooges, function(stooge) { return stooge.age; });
|
||
|
|
* // => { 'name': 'moe', 'age': 40 };
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.min(stooges, 'age');
|
||
|
|
* // => { 'name': 'moe', 'age': 40 };
|
||
|
|
*/
|
||
|
|
function min(collection, callback, thisArg) {
|
||
|
|
var computed = Infinity,
|
||
|
|
result = computed;
|
||
|
|
|
||
|
|
if (!callback && isArray(collection)) {
|
||
|
|
var index = -1,
|
||
|
|
length = collection.length;
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var value = collection[index];
|
||
|
|
if (value < result) {
|
||
|
|
result = value;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
callback = !callback && isString(collection)
|
||
|
|
? charAtCallback
|
||
|
|
: createCallback(callback, thisArg);
|
||
|
|
|
||
|
|
each(collection, function(value, index, collection) {
|
||
|
|
var current = callback(value, index, collection);
|
||
|
|
if (current < computed) {
|
||
|
|
computed = current;
|
||
|
|
result = value;
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Retrieves the value of a specified property from all elements in the `collection`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @type Function
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {String} property The property to pluck.
|
||
|
|
* @returns {Array} Returns a new array of property values.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* _.pluck(stooges, 'name');
|
||
|
|
* // => ['moe', 'larry']
|
||
|
|
*/
|
||
|
|
var pluck = map;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reduces a `collection` to a value that 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 passed, 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 _
|
||
|
|
* @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 {Mixed} [accumulator] Initial value of the accumulator.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the accumulated value.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var sum = _.reduce([1, 2, 3], function(sum, num) {
|
||
|
|
* return sum + num;
|
||
|
|
* });
|
||
|
|
* // => 6
|
||
|
|
*
|
||
|
|
* 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 }
|
||
|
|
*/
|
||
|
|
function reduce(collection, callback, accumulator, thisArg) {
|
||
|
|
var noaccum = arguments.length < 3;
|
||
|
|
callback = createCallback(callback, thisArg, 4);
|
||
|
|
|
||
|
|
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 {
|
||
|
|
each(collection, function(value, index, collection) {
|
||
|
|
accumulator = noaccum
|
||
|
|
? (noaccum = false, value)
|
||
|
|
: callback(accumulator, value, index, collection)
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return accumulator;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This method is similar to `_.reduce`, except that it iterates over a
|
||
|
|
* `collection` from right to left.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias foldr
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Function} [callback=identity] The function called per iteration.
|
||
|
|
* @param {Mixed} [accumulator] Initial value of the accumulator.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the accumulated value.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* 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 reduceRight(collection, callback, accumulator, thisArg) {
|
||
|
|
var iterable = collection,
|
||
|
|
length = collection ? collection.length : 0,
|
||
|
|
noaccum = arguments.length < 3;
|
||
|
|
|
||
|
|
if (typeof length != 'number') {
|
||
|
|
var props = keys(collection);
|
||
|
|
length = props.length;
|
||
|
|
} else if (noCharByIndex && isString(collection)) {
|
||
|
|
iterable = collection.split('');
|
||
|
|
}
|
||
|
|
callback = createCallback(callback, thisArg, 4);
|
||
|
|
forEach(collection, function(value, index, collection) {
|
||
|
|
index = props ? props[--length] : --length;
|
||
|
|
accumulator = noaccum
|
||
|
|
? (noaccum = false, iterable[index])
|
||
|
|
: callback(accumulator, iterable[index], index, collection);
|
||
|
|
});
|
||
|
|
return accumulator;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The opposite of `_.filter`, this method returns the elements of a
|
||
|
|
* `collection` that `callback` does **not** return truthy for.
|
||
|
|
*
|
||
|
|
* If a property name is passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @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 passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a new array of elements that did **not** pass the
|
||
|
|
* callback check.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var odds = _.reject([1, 2, 3, 4, 5, 6], function(num) { return num % 2 == 0; });
|
||
|
|
* // => [1, 3, 5]
|
||
|
|
*
|
||
|
|
* var food = [
|
||
|
|
* { 'name': 'apple', 'organic': false, 'type': 'fruit' },
|
||
|
|
* { 'name': 'carrot', 'organic': true, 'type': 'vegetable' }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.reject(food, 'organic');
|
||
|
|
* // => [{ 'name': 'apple', 'organic': false, 'type': 'fruit' }]
|
||
|
|
*
|
||
|
|
* // using "_.where" callback shorthand
|
||
|
|
* _.reject(food, { 'type': 'fruit' });
|
||
|
|
* // => [{ 'name': 'carrot', 'organic': true, 'type': 'vegetable' }]
|
||
|
|
*/
|
||
|
|
function reject(collection, callback, thisArg) {
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
return filter(collection, function(value, index, collection) {
|
||
|
|
return !callback(value, index, collection);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array of shuffled `array` values, using a version of the
|
||
|
|
* Fisher-Yates shuffle. See http://en.wikipedia.org/wiki/Fisher-Yates_shuffle.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to shuffle.
|
||
|
|
* @returns {Array} Returns a new shuffled collection.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.shuffle([1, 2, 3, 4, 5, 6]);
|
||
|
|
* // => [4, 1, 6, 3, 5, 2]
|
||
|
|
*/
|
||
|
|
function shuffle(collection) {
|
||
|
|
var index = -1,
|
||
|
|
length = collection ? collection.length : 0,
|
||
|
|
result = Array(typeof length == 'number' ? length : 0);
|
||
|
|
|
||
|
|
forEach(collection, function(value) {
|
||
|
|
var rand = floor(nativeRandom() * (++index + 1));
|
||
|
|
result[index] = result[rand];
|
||
|
|
result[rand] = value;
|
||
|
|
});
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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 Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to inspect.
|
||
|
|
* @returns {Number} Returns `collection.length` or number of own enumerable properties.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.size([1, 2]);
|
||
|
|
* // => 2
|
||
|
|
*
|
||
|
|
* _.size({ 'one': 1, 'two': 2, 'three': 3 });
|
||
|
|
* // => 3
|
||
|
|
*
|
||
|
|
* _.size('curly');
|
||
|
|
* // => 5
|
||
|
|
*/
|
||
|
|
function size(collection) {
|
||
|
|
var length = collection ? collection.length : 0;
|
||
|
|
return typeof length == 'number' ? length : keys(collection).length;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks if the `callback` returns a truthy value for **any** element of a
|
||
|
|
* `collection`. The function returns as soon as it finds 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 passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @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 passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Boolean} Returns `true` if any element passes the callback check,
|
||
|
|
* else `false`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.some([null, 0, 'yes', false], Boolean);
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* var food = [
|
||
|
|
* { 'name': 'apple', 'organic': false, 'type': 'fruit' },
|
||
|
|
* { 'name': 'carrot', 'organic': true, 'type': 'vegetable' }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.some(food, 'organic');
|
||
|
|
* // => true
|
||
|
|
*
|
||
|
|
* // using "_.where" callback shorthand
|
||
|
|
* _.some(food, { 'type': 'meat' });
|
||
|
|
* // => false
|
||
|
|
*/
|
||
|
|
function some(collection, callback, thisArg) {
|
||
|
|
var result;
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
|
||
|
|
if (isArray(collection)) {
|
||
|
|
var index = -1,
|
||
|
|
length = collection.length;
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
if ((result = callback(collection[index], index, collection))) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
each(collection, function(value, index, collection) {
|
||
|
|
return !(result = callback(value, index, collection));
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return !!result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array of elements, sorted in ascending order by the results of
|
||
|
|
* running each element in the `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).
|
||
|
|
*
|
||
|
|
* If a property name is passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @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 passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a new array of sorted elements.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.sortBy([1, 2, 3], function(num) { return Math.sin(num); });
|
||
|
|
* // => [3, 1, 2]
|
||
|
|
*
|
||
|
|
* _.sortBy([1, 2, 3], function(num) { return this.sin(num); }, Math);
|
||
|
|
* // => [3, 1, 2]
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.sortBy(['banana', 'strawberry', 'apple'], 'length');
|
||
|
|
* // => ['apple', 'banana', 'strawberry']
|
||
|
|
*/
|
||
|
|
function sortBy(collection, callback, thisArg) {
|
||
|
|
var index = -1,
|
||
|
|
length = collection ? collection.length : 0,
|
||
|
|
result = Array(typeof length == 'number' ? length : 0);
|
||
|
|
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
forEach(collection, function(value, key, collection) {
|
||
|
|
result[++index] = {
|
||
|
|
'criteria': callback(value, key, collection),
|
||
|
|
'index': index,
|
||
|
|
'value': value
|
||
|
|
};
|
||
|
|
});
|
||
|
|
|
||
|
|
length = result.length;
|
||
|
|
result.sort(compareAscending);
|
||
|
|
while (length--) {
|
||
|
|
result[length] = result[length].value;
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Converts the `collection` to an array.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to convert.
|
||
|
|
* @returns {Array} Returns the new converted array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* (function() { return _.toArray(arguments).slice(1); })(1, 2, 3, 4);
|
||
|
|
* // => [2, 3, 4]
|
||
|
|
*/
|
||
|
|
function toArray(collection) {
|
||
|
|
if (collection && typeof collection.length == 'number') {
|
||
|
|
return noCharByIndex && isString(collection)
|
||
|
|
? collection.split('')
|
||
|
|
: slice(collection);
|
||
|
|
}
|
||
|
|
return values(collection);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Examines each element in a `collection`, returning an array of all elements
|
||
|
|
* that have the given `properties`. When checking `properties`, this method
|
||
|
|
* performs a deep comparison between values to determine if they are equivalent
|
||
|
|
* to each other.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @type Function
|
||
|
|
* @category Collections
|
||
|
|
* @param {Array|Object|String} collection The collection to iterate over.
|
||
|
|
* @param {Object} properties The object of property values to filter by.
|
||
|
|
* @returns {Array} Returns a new array of elements that have the given `properties`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var stooges = [
|
||
|
|
* { 'name': 'moe', 'age': 40 },
|
||
|
|
* { 'name': 'larry', 'age': 50 }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* _.where(stooges, { 'age': 40 });
|
||
|
|
* // => [{ 'name': 'moe', 'age': 40 }]
|
||
|
|
*/
|
||
|
|
var where = filter;
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array with all falsey values of `array` removed. The values
|
||
|
|
* `false`, `null`, `0`, `""`, `undefined` and `NaN` are all falsey.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to compact.
|
||
|
|
* @returns {Array} Returns a new filtered array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.compact([0, 1, false, 2, '', 3]);
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*/
|
||
|
|
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 `array` elements not present in the other arrays
|
||
|
|
* using strict equality for comparisons, i.e. `===`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to process.
|
||
|
|
* @param {Array} [array1, array2, ...] Arrays to check.
|
||
|
|
* @returns {Array} Returns a new array of `array` elements not present in the
|
||
|
|
* other arrays.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.difference([1, 2, 3, 4, 5], [5, 2, 10]);
|
||
|
|
* // => [1, 3, 4]
|
||
|
|
*/
|
||
|
|
function difference(array) {
|
||
|
|
var index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
flattened = concat.apply(arrayRef, arguments),
|
||
|
|
contains = cachedContains(flattened, length),
|
||
|
|
result = [];
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var value = array[index];
|
||
|
|
if (!contains(value)) {
|
||
|
|
result.push(value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the first element of the `array`. If a number `n` is passed, the first
|
||
|
|
* `n` elements of the `array` are returned. If a `callback` function is passed,
|
||
|
|
* the first elements the `callback` returns truthy for are returned. The `callback`
|
||
|
|
* is bound to `thisArg` and invoked with three arguments; (value, index, array).
|
||
|
|
*
|
||
|
|
* If a property name is passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias head, take
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to query.
|
||
|
|
* @param {Function|Object|Number|String} [callback|n] The function called
|
||
|
|
* per element or the number of elements to return. If a property name or
|
||
|
|
* object is passed, it will be used to create a "_.pluck" or "_.where"
|
||
|
|
* style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the first element(s) of `array`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.first([1, 2, 3]);
|
||
|
|
* // => 1
|
||
|
|
*
|
||
|
|
* _.first([1, 2, 3], 2);
|
||
|
|
* // => [1, 2]
|
||
|
|
*
|
||
|
|
* _.first([1, 2, 3], function(num) {
|
||
|
|
* return num < 3;
|
||
|
|
* });
|
||
|
|
* // => [1, 2]
|
||
|
|
*
|
||
|
|
* var food = [
|
||
|
|
* { 'name': 'banana', 'organic': true },
|
||
|
|
* { 'name': 'beet', 'organic': false },
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.first(food, 'organic');
|
||
|
|
* // => [{ 'name': 'banana', 'organic': true }]
|
||
|
|
*
|
||
|
|
* var food = [
|
||
|
|
* { 'name': 'apple', 'type': 'fruit' },
|
||
|
|
* { 'name': 'banana', 'type': 'fruit' },
|
||
|
|
* { 'name': 'beet', 'type': 'vegetable' }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.where" callback shorthand
|
||
|
|
* _.first(food, { 'type': 'fruit' });
|
||
|
|
* // => [{ 'name': 'apple', 'type': 'fruit' }, { 'name': 'banana', 'type': 'fruit' }]
|
||
|
|
*/
|
||
|
|
function first(array, callback, thisArg) {
|
||
|
|
if (array) {
|
||
|
|
var n = 0,
|
||
|
|
length = array.length;
|
||
|
|
|
||
|
|
if (typeof callback != 'number' && callback != null) {
|
||
|
|
var index = -1;
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
while (++index < length && callback(array[index], index, array)) {
|
||
|
|
n++;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
n = callback;
|
||
|
|
if (n == null || thisArg) {
|
||
|
|
return array[0];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return slice(array, 0, nativeMin(nativeMax(0, n), length));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Flattens a nested array (the nesting can be to any depth). If `shallow` is
|
||
|
|
* truthy, `array` will only be flattened a single level.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to compact.
|
||
|
|
* @param {Boolean} shallow A flag to indicate only flattening a single level.
|
||
|
|
* @returns {Array} Returns a new flattened array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.flatten([1, [2], [3, [[4]]]]);
|
||
|
|
* // => [1, 2, 3, 4];
|
||
|
|
*
|
||
|
|
* _.flatten([1, [2], [3, [[4]]]], true);
|
||
|
|
* // => [1, 2, 3, [[4]]];
|
||
|
|
*/
|
||
|
|
function flatten(array, shallow) {
|
||
|
|
var index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
result = [];
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var value = array[index];
|
||
|
|
|
||
|
|
// recursively flatten arrays (susceptible to call stack limits)
|
||
|
|
if (isArray(value)) {
|
||
|
|
push.apply(result, shallow ? value : flatten(value));
|
||
|
|
} else {
|
||
|
|
result.push(value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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, passing `true` for `fromIndex` will run a faster binary search.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to search.
|
||
|
|
* @param {Mixed} 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
|
||
|
|
*
|
||
|
|
* _.indexOf([1, 2, 3, 1, 2, 3], 2);
|
||
|
|
* // => 1
|
||
|
|
*
|
||
|
|
* _.indexOf([1, 2, 3, 1, 2, 3], 2, 3);
|
||
|
|
* // => 4
|
||
|
|
*
|
||
|
|
* _.indexOf([1, 1, 2, 2, 3, 3], 2, true);
|
||
|
|
* // => 2
|
||
|
|
*/
|
||
|
|
function indexOf(array, value, fromIndex) {
|
||
|
|
var index = -1,
|
||
|
|
length = array ? array.length : 0;
|
||
|
|
|
||
|
|
if (typeof fromIndex == 'number') {
|
||
|
|
index = (fromIndex < 0 ? nativeMax(0, length + fromIndex) : fromIndex || 0) - 1;
|
||
|
|
} else if (fromIndex) {
|
||
|
|
index = sortedIndex(array, value);
|
||
|
|
return array[index] === value ? index : -1;
|
||
|
|
}
|
||
|
|
while (++index < length) {
|
||
|
|
if (array[index] === value) {
|
||
|
|
return index;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets all but the last element of `array`. If a number `n` is passed, the
|
||
|
|
* last `n` elements are excluded from the result. If a `callback` function
|
||
|
|
* is passed, the last elements the `callback` returns truthy for are excluded
|
||
|
|
* from the result. The `callback` is bound to `thisArg` and invoked with three
|
||
|
|
* arguments; (value, index, array).
|
||
|
|
*
|
||
|
|
* If a property name is passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to query.
|
||
|
|
* @param {Function|Object|Number|String} [callback|n=1] The function called
|
||
|
|
* per element or the number of elements to exclude. If a property name or
|
||
|
|
* object is passed, it will be used to create a "_.pluck" or "_.where"
|
||
|
|
* style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a slice of `array`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.initial([1, 2, 3]);
|
||
|
|
* // => [1, 2]
|
||
|
|
*
|
||
|
|
* _.initial([1, 2, 3], 2);
|
||
|
|
* // => [1]
|
||
|
|
*
|
||
|
|
* _.initial([1, 2, 3], function(num) {
|
||
|
|
* return num > 1;
|
||
|
|
* });
|
||
|
|
* // => [1]
|
||
|
|
*
|
||
|
|
* var food = [
|
||
|
|
* { 'name': 'beet', 'organic': false },
|
||
|
|
* { 'name': 'carrot', 'organic': true }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.initial(food, 'organic');
|
||
|
|
* // => [{ 'name': 'beet', 'organic': false }]
|
||
|
|
*
|
||
|
|
* var food = [
|
||
|
|
* { 'name': 'banana', 'type': 'fruit' },
|
||
|
|
* { 'name': 'beet', 'type': 'vegetable' },
|
||
|
|
* { 'name': 'carrot', 'type': 'vegetable' }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.where" callback shorthand
|
||
|
|
* _.initial(food, { 'type': 'vegetable' });
|
||
|
|
* // => [{ 'name': 'banana', 'type': 'fruit' }]
|
||
|
|
*/
|
||
|
|
function initial(array, callback, thisArg) {
|
||
|
|
if (!array) {
|
||
|
|
return [];
|
||
|
|
}
|
||
|
|
var n = 0,
|
||
|
|
length = array.length;
|
||
|
|
|
||
|
|
if (typeof callback != 'number' && callback != null) {
|
||
|
|
var index = length;
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
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));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Computes the intersection of all the passed-in arrays using strict equality
|
||
|
|
* for comparisons, i.e. `===`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} [array1, array2, ...] Arrays to process.
|
||
|
|
* @returns {Array} Returns a new array of unique elements that are present
|
||
|
|
* in **all** of the arrays.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.intersection([1, 2, 3], [101, 2, 1, 10], [2, 1]);
|
||
|
|
* // => [1, 2]
|
||
|
|
*/
|
||
|
|
function intersection(array) {
|
||
|
|
var args = arguments,
|
||
|
|
argsLength = args.length,
|
||
|
|
cache = { '0': {} },
|
||
|
|
index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
isLarge = length >= 100,
|
||
|
|
result = [],
|
||
|
|
seen = result;
|
||
|
|
|
||
|
|
outer:
|
||
|
|
while (++index < length) {
|
||
|
|
var value = array[index];
|
||
|
|
if (isLarge) {
|
||
|
|
var key = value + '';
|
||
|
|
var inited = hasOwnProperty.call(cache[0], key)
|
||
|
|
? !(seen = cache[0][key])
|
||
|
|
: (seen = cache[0][key] = []);
|
||
|
|
}
|
||
|
|
if (inited || indexOf(seen, value) < 0) {
|
||
|
|
if (isLarge) {
|
||
|
|
seen.push(value);
|
||
|
|
}
|
||
|
|
var argsIndex = argsLength;
|
||
|
|
while (--argsIndex) {
|
||
|
|
if (!(cache[argsIndex] || (cache[argsIndex] = cachedContains(args[argsIndex], 0, 100)))(value)) {
|
||
|
|
continue outer;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
result.push(value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Gets the last element of the `array`. If a number `n` is passed, the last
|
||
|
|
* `n` elements of the `array` are returned. If a `callback` function is passed,
|
||
|
|
* the last elements the `callback` returns truthy for are returned. The `callback`
|
||
|
|
* is bound to `thisArg` and invoked with three arguments; (value, index, array).
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* If a property name is passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to query.
|
||
|
|
* @param {Function|Object|Number|String} [callback|n] The function called
|
||
|
|
* per element or the number of elements to return. If a property name or
|
||
|
|
* object is passed, it will be used to create a "_.pluck" or "_.where"
|
||
|
|
* style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Mixed} Returns the last element(s) of `array`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.last([1, 2, 3]);
|
||
|
|
* // => 3
|
||
|
|
*
|
||
|
|
* _.last([1, 2, 3], 2);
|
||
|
|
* // => [2, 3]
|
||
|
|
*
|
||
|
|
* _.last([1, 2, 3], function(num) {
|
||
|
|
* return num > 1;
|
||
|
|
* });
|
||
|
|
* // => [2, 3]
|
||
|
|
*
|
||
|
|
* var food = [
|
||
|
|
* { 'name': 'beet', 'organic': false },
|
||
|
|
* { 'name': 'carrot', 'organic': true }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.last(food, 'organic');
|
||
|
|
* // => [{ 'name': 'carrot', 'organic': true }]
|
||
|
|
*
|
||
|
|
* var food = [
|
||
|
|
* { 'name': 'banana', 'type': 'fruit' },
|
||
|
|
* { 'name': 'beet', 'type': 'vegetable' },
|
||
|
|
* { 'name': 'carrot', 'type': 'vegetable' }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.where" callback shorthand
|
||
|
|
* _.last(food, { 'type': 'vegetable' });
|
||
|
|
* // => [{ 'name': 'beet', 'type': 'vegetable' }, { 'name': 'carrot', 'type': 'vegetable' }]
|
||
|
|
*/
|
||
|
|
function last(array, callback, thisArg) {
|
||
|
|
if (array) {
|
||
|
|
var n = 0,
|
||
|
|
length = array.length;
|
||
|
|
|
||
|
|
if (typeof callback != 'number' && callback != null) {
|
||
|
|
var index = length;
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
while (index-- && callback(array[index], index, array)) {
|
||
|
|
n++;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
n = callback;
|
||
|
|
if (n == null || thisArg) {
|
||
|
|
return array[length - 1];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return slice(array, nativeMax(0, length - n));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to search.
|
||
|
|
* @param {Mixed} 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
|
||
|
|
*
|
||
|
|
* _.lastIndexOf([1, 2, 3, 1, 2, 3], 2);
|
||
|
|
* // => 4
|
||
|
|
*
|
||
|
|
* _.lastIndexOf([1, 2, 3, 1, 2, 3], 2, 3);
|
||
|
|
* // => 1
|
||
|
|
*/
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an object composed from arrays of `keys` and `values`. Pass 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 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
|
||
|
|
*
|
||
|
|
* _.object(['moe', 'larry'], [30, 40]);
|
||
|
|
* // => { 'moe': 30, 'larry': 40 }
|
||
|
|
*/
|
||
|
|
function object(keys, values) {
|
||
|
|
var index = -1,
|
||
|
|
length = keys ? keys.length : 0,
|
||
|
|
result = {};
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var key = keys[index];
|
||
|
|
if (values) {
|
||
|
|
result[key] = values[index];
|
||
|
|
} else {
|
||
|
|
result[key[0]] = key[1];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array of numbers (positive and/or negative) progressing from
|
||
|
|
* `start` up to but not including `end`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @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 descrement by.
|
||
|
|
* @returns {Array} Returns a new range array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.range(10);
|
||
|
|
* // => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
|
||
|
|
*
|
||
|
|
* _.range(1, 11);
|
||
|
|
* // => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
|
||
|
|
*
|
||
|
|
* _.range(0, 30, 5);
|
||
|
|
* // => [0, 5, 10, 15, 20, 25]
|
||
|
|
*
|
||
|
|
* _.range(0, -10, -1);
|
||
|
|
* // => [0, -1, -2, -3, -4, -5, -6, -7, -8, -9]
|
||
|
|
*
|
||
|
|
* _.range(0);
|
||
|
|
* // => []
|
||
|
|
*/
|
||
|
|
function range(start, end, step) {
|
||
|
|
start = +start || 0;
|
||
|
|
step = +step || 1;
|
||
|
|
|
||
|
|
if (end == null) {
|
||
|
|
end = start;
|
||
|
|
start = 0;
|
||
|
|
}
|
||
|
|
// use `Array(length)` so V8 will avoid the slower "dictionary" mode
|
||
|
|
// http://youtu.be/XAqIpGU8ZZk#t=17m25s
|
||
|
|
var index = -1,
|
||
|
|
length = nativeMax(0, ceil((end - start) / step)),
|
||
|
|
result = Array(length);
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
result[index] = start;
|
||
|
|
start += step;
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The opposite of `_.initial`, this method gets all but the first value of `array`.
|
||
|
|
* If a number `n` is passed, the first `n` values are excluded from the result.
|
||
|
|
* If a `callback` function is passed, the first elements the `callback` returns
|
||
|
|
* truthy for are excluded from the result. The `callback` is bound to `thisArg`
|
||
|
|
* and invoked with three arguments; (value, index, array).
|
||
|
|
*
|
||
|
|
* If a property name is passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias drop, tail
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to query.
|
||
|
|
* @param {Function|Object|Number|String} [callback|n=1] The function called
|
||
|
|
* per element or the number of elements to exclude. If a property name or
|
||
|
|
* object is passed, it will be used to create a "_.pluck" or "_.where"
|
||
|
|
* style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a slice of `array`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.rest([1, 2, 3]);
|
||
|
|
* // => [2, 3]
|
||
|
|
*
|
||
|
|
* _.rest([1, 2, 3], 2);
|
||
|
|
* // => [3]
|
||
|
|
*
|
||
|
|
* _.rest([1, 2, 3], function(num) {
|
||
|
|
* return num < 3;
|
||
|
|
* });
|
||
|
|
* // => [3]
|
||
|
|
*
|
||
|
|
* var food = [
|
||
|
|
* { 'name': 'banana', 'organic': true },
|
||
|
|
* { 'name': 'beet', 'organic': false },
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.rest(food, 'organic');
|
||
|
|
* // => [{ 'name': 'beet', 'organic': false }]
|
||
|
|
*
|
||
|
|
* var food = [
|
||
|
|
* { 'name': 'apple', 'type': 'fruit' },
|
||
|
|
* { 'name': 'banana', 'type': 'fruit' },
|
||
|
|
* { 'name': 'beet', 'type': 'vegetable' }
|
||
|
|
* ];
|
||
|
|
*
|
||
|
|
* // using "_.where" callback shorthand
|
||
|
|
* _.rest(food, { 'type': 'fruit' });
|
||
|
|
* // => [{ 'name': 'beet', 'type': 'vegetable' }]
|
||
|
|
*/
|
||
|
|
function rest(array, callback, thisArg) {
|
||
|
|
if (typeof callback != 'number' && callback != null) {
|
||
|
|
var n = 0,
|
||
|
|
index = -1,
|
||
|
|
length = array ? array.length : 0;
|
||
|
|
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
while (++index < length && callback(array[index], index, array)) {
|
||
|
|
n++;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
n = (callback == null || thisArg) ? 1 : nativeMax(0, callback);
|
||
|
|
}
|
||
|
|
return slice(array, n);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Uses a binary search to determine the smallest index at which the `value`
|
||
|
|
* should be inserted into `array` in order to maintain the sort order of the
|
||
|
|
* sorted `array`. If `callback` is passed, it will be executed for `value` and
|
||
|
|
* each element in `array` to compute their sort ranking. The `callback` is
|
||
|
|
* bound to `thisArg` and invoked with one argument; (value).
|
||
|
|
*
|
||
|
|
* If a property name is passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to iterate over.
|
||
|
|
* @param {Mixed} value The value to evaluate.
|
||
|
|
* @param {Function|Object|String} [callback=identity] The function called per
|
||
|
|
* iteration. If a property name or object is passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Number} Returns the index at which the value should be inserted
|
||
|
|
* into `array`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.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 }
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
|
||
|
|
* return dict.wordToNumber[word];
|
||
|
|
* });
|
||
|
|
* // => 2
|
||
|
|
*
|
||
|
|
* _.sortedIndex(['twenty', 'thirty', 'fifty'], 'fourty', function(word) {
|
||
|
|
* return this.wordToNumber[word];
|
||
|
|
* }, dict);
|
||
|
|
* // => 2
|
||
|
|
*/
|
||
|
|
function sortedIndex(array, value, callback, thisArg) {
|
||
|
|
var low = 0,
|
||
|
|
high = array ? array.length : low;
|
||
|
|
|
||
|
|
// explicitly reference `identity` for better inlining in Firefox
|
||
|
|
callback = callback ? createCallback(callback, thisArg, 1) : identity;
|
||
|
|
value = callback(value);
|
||
|
|
|
||
|
|
while (low < high) {
|
||
|
|
var mid = (low + high) >>> 1;
|
||
|
|
callback(array[mid]) < value
|
||
|
|
? low = mid + 1
|
||
|
|
: high = mid;
|
||
|
|
}
|
||
|
|
return low;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Computes the union of the passed-in arrays using strict equality for
|
||
|
|
* comparisons, i.e. `===`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} [array1, array2, ...] Arrays to process.
|
||
|
|
* @returns {Array} Returns a new array of unique values, in order, that are
|
||
|
|
* present in one or more of the arrays.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.union([1, 2, 3], [101, 2, 1, 10], [2, 1]);
|
||
|
|
* // => [1, 2, 3, 101, 10]
|
||
|
|
*/
|
||
|
|
function union() {
|
||
|
|
return uniq(concat.apply(arrayRef, arguments));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a duplicate-value-free version of the `array` using strict equality
|
||
|
|
* for comparisons, i.e. `===`. If the `array` is already sorted, passing `true`
|
||
|
|
* for `isSorted` will run a faster algorithm. If `callback` is passed, each
|
||
|
|
* element of `array` is passed through a callback` before uniqueness is computed.
|
||
|
|
* The `callback` is bound to `thisArg` and invoked with three arguments; (value, index, array).
|
||
|
|
*
|
||
|
|
* If a property name is passed for `callback`, the created "_.pluck" style
|
||
|
|
* callback will return the property value of the given element.
|
||
|
|
*
|
||
|
|
* If an object is passed for `callback`, the created "_.where" style callback
|
||
|
|
* will return `true` for elements that have the propeties of the given object,
|
||
|
|
* else `false`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @alias unique
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to process.
|
||
|
|
* @param {Boolean} [isSorted=false] A flag to indicate that the `array` is already sorted.
|
||
|
|
* @param {Function|Object|String} [callback=identity] The function called per
|
||
|
|
* iteration. If a property name or object is passed, it will be used to create
|
||
|
|
* a "_.pluck" or "_.where" style callback, respectively.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a duplicate-value-free array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.uniq([1, 2, 1, 3, 1]);
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*
|
||
|
|
* _.uniq([1, 1, 2, 2, 3], true);
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*
|
||
|
|
* _.uniq([1, 2, 1.5, 3, 2.5], function(num) { return Math.floor(num); });
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*
|
||
|
|
* _.uniq([1, 2, 1.5, 3, 2.5], function(num) { return this.floor(num); }, Math);
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*
|
||
|
|
* // using "_.pluck" callback shorthand
|
||
|
|
* _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
|
||
|
|
* // => [{ 'x': 1 }, { 'x': 2 }]
|
||
|
|
*/
|
||
|
|
function uniq(array, isSorted, callback, thisArg) {
|
||
|
|
var index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
result = [],
|
||
|
|
seen = result;
|
||
|
|
|
||
|
|
// juggle arguments
|
||
|
|
if (typeof isSorted == 'function') {
|
||
|
|
thisArg = callback;
|
||
|
|
callback = isSorted;
|
||
|
|
isSorted = false;
|
||
|
|
}
|
||
|
|
// init value cache for large arrays
|
||
|
|
var isLarge = !isSorted && length >= 75;
|
||
|
|
if (isLarge) {
|
||
|
|
var cache = {};
|
||
|
|
}
|
||
|
|
if (callback) {
|
||
|
|
seen = [];
|
||
|
|
callback = createCallback(callback, thisArg);
|
||
|
|
}
|
||
|
|
while (++index < length) {
|
||
|
|
var value = array[index],
|
||
|
|
computed = callback ? callback(value, index, array) : value;
|
||
|
|
|
||
|
|
if (isLarge) {
|
||
|
|
var key = computed + '';
|
||
|
|
var inited = hasOwnProperty.call(cache, key)
|
||
|
|
? !(seen = cache[key])
|
||
|
|
: (seen = cache[key] = []);
|
||
|
|
}
|
||
|
|
if (isSorted
|
||
|
|
? !index || seen[seen.length - 1] !== computed
|
||
|
|
: inited || indexOf(seen, computed) < 0
|
||
|
|
) {
|
||
|
|
if (callback || isLarge) {
|
||
|
|
seen.push(computed);
|
||
|
|
}
|
||
|
|
result.push(value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates an array with all occurrences of the passed values removed using
|
||
|
|
* strict equality for comparisons, i.e. `===`.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} array The array to filter.
|
||
|
|
* @param {Mixed} [value1, value2, ...] Values to remove.
|
||
|
|
* @returns {Array} Returns a new filtered array.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.without([1, 2, 1, 0, 3, 1, 4], 0, 1);
|
||
|
|
* // => [2, 3, 4]
|
||
|
|
*/
|
||
|
|
function without(array) {
|
||
|
|
var index = -1,
|
||
|
|
length = array ? array.length : 0,
|
||
|
|
contains = cachedContains(arguments, 1),
|
||
|
|
result = [];
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var value = array[index];
|
||
|
|
if (!contains(value)) {
|
||
|
|
result.push(value);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Groups the elements of each array at their corresponding indexes. Useful for
|
||
|
|
* separate data sources that are coordinated through matching array indexes.
|
||
|
|
* For a matrix of nested arrays, `_.zip.apply(...)` can transpose the matrix
|
||
|
|
* in a similar fashion.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Arrays
|
||
|
|
* @param {Array} [array1, array2, ...] Arrays to process.
|
||
|
|
* @returns {Array} Returns a new array of grouped elements.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.zip(['moe', 'larry'], [30, 40], [true, false]);
|
||
|
|
* // => [['moe', 30, true], ['larry', 40, false]]
|
||
|
|
*/
|
||
|
|
function zip(array) {
|
||
|
|
var index = -1,
|
||
|
|
length = array ? max(pluck(arguments, 'length')) : 0,
|
||
|
|
result = Array(length);
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
result[index] = pluck(arguments, index);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that is restricted to executing `func` only after it is
|
||
|
|
* called `n` times. The `func` is executed with the `this` binding of the
|
||
|
|
* created function.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Number} n The number of times the function must be called before
|
||
|
|
* it is executed.
|
||
|
|
* @param {Function} func The function to restrict.
|
||
|
|
* @returns {Function} Returns the new restricted function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var renderNotes = _.after(notes.length, render);
|
||
|
|
* _.forEach(notes, function(note) {
|
||
|
|
* note.asyncSave({ 'success': renderNotes });
|
||
|
|
* });
|
||
|
|
* // `renderNotes` is run once, after all notes have saved
|
||
|
|
*/
|
||
|
|
function after(n, func) {
|
||
|
|
if (n < 1) {
|
||
|
|
return func();
|
||
|
|
}
|
||
|
|
return function() {
|
||
|
|
if (--n < 1) {
|
||
|
|
return func.apply(this, arguments);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that, when called, invokes `func` with the `this`
|
||
|
|
* binding of `thisArg` and prepends any additional `bind` arguments to those
|
||
|
|
* passed to the bound function.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to bind.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `func`.
|
||
|
|
* @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied.
|
||
|
|
* @returns {Function} Returns the new bound function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var func = function(greeting) {
|
||
|
|
* return greeting + ' ' + this.name;
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* func = _.bind(func, { 'name': 'moe' }, 'hi');
|
||
|
|
* func();
|
||
|
|
* // => 'hi moe'
|
||
|
|
*/
|
||
|
|
function bind(func, thisArg) {
|
||
|
|
// use `Function#bind` if it exists and is fast
|
||
|
|
// (in V8 `Function#bind` is slower except when partially applied)
|
||
|
|
return isBindFast || (nativeBind && arguments.length > 2)
|
||
|
|
? nativeBind.call.apply(nativeBind, arguments)
|
||
|
|
: createBound(func, thisArg, slice(arguments, 2));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Binds methods on `object` to `object`, 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 Functions
|
||
|
|
* @param {Object} object The object to bind and assign the bound methods to.
|
||
|
|
* @param {String} [methodName1, methodName2, ...] Method names on the object to bind.
|
||
|
|
* @returns {Object} Returns `object`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var view = {
|
||
|
|
* 'label': 'docs',
|
||
|
|
* 'onClick': function() { alert('clicked ' + this.label); }
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* _.bindAll(view);
|
||
|
|
* jQuery('#docs').on('click', view.onClick);
|
||
|
|
* // => alerts 'clicked docs', when the button is clicked
|
||
|
|
*/
|
||
|
|
function bindAll(object) {
|
||
|
|
var funcs = concat.apply(arrayRef, arguments),
|
||
|
|
index = funcs.length > 1 ? 0 : (funcs = functions(object), -1),
|
||
|
|
length = funcs.length;
|
||
|
|
|
||
|
|
while (++index < length) {
|
||
|
|
var key = funcs[index];
|
||
|
|
object[key] = bind(object[key], object);
|
||
|
|
}
|
||
|
|
return object;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that, when called, invokes the method at `object[key]`
|
||
|
|
* and prepends any additional `bindKey` arguments to those passed 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 Functions
|
||
|
|
* @param {Object} object The object the method belongs to.
|
||
|
|
* @param {String} key The key of the method.
|
||
|
|
* @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied.
|
||
|
|
* @returns {Function} Returns the new bound function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var object = {
|
||
|
|
* 'name': 'moe',
|
||
|
|
* 'greet': function(greeting) {
|
||
|
|
* return greeting + ' ' + this.name;
|
||
|
|
* }
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* var func = _.bindKey(object, 'greet', 'hi');
|
||
|
|
* func();
|
||
|
|
* // => 'hi moe'
|
||
|
|
*
|
||
|
|
* object.greet = function(greeting) {
|
||
|
|
* return greeting + ', ' + this.name + '!';
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* func();
|
||
|
|
* // => 'hi, moe!'
|
||
|
|
*/
|
||
|
|
function bindKey(object, key) {
|
||
|
|
return createBound(object, key, slice(arguments, 2));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that is the composition of the passed 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 Functions
|
||
|
|
* @param {Function} [func1, func2, ...] Functions to compose.
|
||
|
|
* @returns {Function} Returns the new composed function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var greet = function(name) { return 'hi ' + name; };
|
||
|
|
* var exclaim = function(statement) { return statement + '!'; };
|
||
|
|
* var welcome = _.compose(exclaim, greet);
|
||
|
|
* welcome('moe');
|
||
|
|
* // => 'hi moe!'
|
||
|
|
*/
|
||
|
|
function compose() {
|
||
|
|
var funcs = arguments;
|
||
|
|
return function() {
|
||
|
|
var args = arguments,
|
||
|
|
length = funcs.length;
|
||
|
|
|
||
|
|
while (length--) {
|
||
|
|
args = [funcs[length].apply(this, args)];
|
||
|
|
}
|
||
|
|
return args[0];
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that will delay the execution of `func` until after
|
||
|
|
* `wait` milliseconds have elapsed since the last time it was invoked. Pass
|
||
|
|
* `true` for `immediate` to cause debounce to invoke `func` on the leading,
|
||
|
|
* instead of the trailing, edge of the `wait` timeout. Subsequent calls to
|
||
|
|
* the debounced function will return the result of the last `func` call.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to debounce.
|
||
|
|
* @param {Number} wait The number of milliseconds to delay.
|
||
|
|
* @param {Boolean} immediate A flag to indicate execution is on the leading
|
||
|
|
* edge of the timeout.
|
||
|
|
* @returns {Function} Returns the new debounced function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var lazyLayout = _.debounce(calculateLayout, 300);
|
||
|
|
* jQuery(window).on('resize', lazyLayout);
|
||
|
|
*/
|
||
|
|
function debounce(func, wait, immediate) {
|
||
|
|
var args,
|
||
|
|
result,
|
||
|
|
thisArg,
|
||
|
|
timeoutId;
|
||
|
|
|
||
|
|
function delayed() {
|
||
|
|
timeoutId = null;
|
||
|
|
if (!immediate) {
|
||
|
|
result = func.apply(thisArg, args);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return function() {
|
||
|
|
var isImmediate = immediate && !timeoutId;
|
||
|
|
args = arguments;
|
||
|
|
thisArg = this;
|
||
|
|
|
||
|
|
clearTimeout(timeoutId);
|
||
|
|
timeoutId = setTimeout(delayed, wait);
|
||
|
|
|
||
|
|
if (isImmediate) {
|
||
|
|
result = func.apply(thisArg, args);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Executes the `func` function after `wait` milliseconds. Additional arguments
|
||
|
|
* will be passed to `func` when it is invoked.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to delay.
|
||
|
|
* @param {Number} wait The number of milliseconds to delay execution.
|
||
|
|
* @param {Mixed} [arg1, arg2, ...] Arguments to invoke the function with.
|
||
|
|
* @returns {Number} Returns the `setTimeout` timeout id.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var log = _.bind(console.log, console);
|
||
|
|
* _.delay(log, 1000, 'logged later');
|
||
|
|
* // => 'logged later' (Appears after one second.)
|
||
|
|
*/
|
||
|
|
function delay(func, wait) {
|
||
|
|
var args = slice(arguments, 2);
|
||
|
|
return setTimeout(function() { func.apply(undefined, args); }, wait);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Defers executing the `func` function until the current call stack has cleared.
|
||
|
|
* Additional arguments will be passed to `func` when it is invoked.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to defer.
|
||
|
|
* @param {Mixed} [arg1, arg2, ...] Arguments to invoke the function with.
|
||
|
|
* @returns {Number} Returns the `setTimeout` timeout id.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.defer(function() { alert('deferred'); });
|
||
|
|
* // returns from the function before `alert` is called
|
||
|
|
*/
|
||
|
|
function defer(func) {
|
||
|
|
var args = slice(arguments, 1);
|
||
|
|
return setTimeout(function() { func.apply(undefined, args); }, 1);
|
||
|
|
}
|
||
|
|
// use `setImmediate` if it's available in Node.js
|
||
|
|
if (isV8 && freeModule && typeof setImmediate == 'function') {
|
||
|
|
defer = bind(setImmediate, window);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that memoizes the result of `func`. If `resolver` is
|
||
|
|
* passed, it will be used to determine the cache key for storing the result
|
||
|
|
* based on the arguments passed to the memoized function. By default, the first
|
||
|
|
* argument passed to the memoized function is used as the cache key. The `func`
|
||
|
|
* is executed with the `this` binding of the memoized function.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @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 fibonacci = _.memoize(function(n) {
|
||
|
|
* return n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2);
|
||
|
|
* });
|
||
|
|
*/
|
||
|
|
function memoize(func, resolver) {
|
||
|
|
var cache = {};
|
||
|
|
return function() {
|
||
|
|
var key = (resolver ? resolver.apply(this, arguments) : arguments[0]) + '';
|
||
|
|
return hasOwnProperty.call(cache, key)
|
||
|
|
? cache[key]
|
||
|
|
: (cache[key] = func.apply(this, arguments));
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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 Functions
|
||
|
|
* @param {Function} func The function to restrict.
|
||
|
|
* @returns {Function} Returns the new restricted function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var initialize = _.once(createApplication);
|
||
|
|
* initialize();
|
||
|
|
* initialize();
|
||
|
|
* // `initialize` executes `createApplication` once
|
||
|
|
*/
|
||
|
|
function once(func) {
|
||
|
|
var ran,
|
||
|
|
result;
|
||
|
|
|
||
|
|
return function() {
|
||
|
|
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, when called, invokes `func` with any additional
|
||
|
|
* `partial` arguments prepended to those passed to the new function. This
|
||
|
|
* method is similar to `_.bind`, except it does **not** alter the `this` binding.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to partially apply arguments to.
|
||
|
|
* @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied.
|
||
|
|
* @returns {Function} Returns the new partially applied function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var greet = function(greeting, name) { return greeting + ' ' + name; };
|
||
|
|
* var hi = _.partial(greet, 'hi');
|
||
|
|
* hi('moe');
|
||
|
|
* // => 'hi moe'
|
||
|
|
*/
|
||
|
|
function partial(func) {
|
||
|
|
return createBound(func, slice(arguments, 1));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This method is similar to `_.partial`, except that `partial` arguments are
|
||
|
|
* appended to those passed to the new function.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to partially apply arguments to.
|
||
|
|
* @param {Mixed} [arg1, arg2, ...] Arguments to be partially applied.
|
||
|
|
* @returns {Function} Returns the new partially applied function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var defaultsDeep = _.partialRight(_.merge, _.defaults);
|
||
|
|
*
|
||
|
|
* var options = {
|
||
|
|
* 'variable': 'data',
|
||
|
|
* 'imports': { 'jq': $ }
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* defaultsDeep(options, _.templateSettings);
|
||
|
|
*
|
||
|
|
* options.variable
|
||
|
|
* // => 'data'
|
||
|
|
*
|
||
|
|
* options.imports
|
||
|
|
* // => { '_': _, 'jq': $ }
|
||
|
|
*/
|
||
|
|
function partialRight(func) {
|
||
|
|
return createBound(func, slice(arguments, 1), null, indicatorObject);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that, when executed, will only call the `func`
|
||
|
|
* function at most once per every `wait` milliseconds. If the throttled
|
||
|
|
* function is invoked more than once during the `wait` timeout, `func` will
|
||
|
|
* also be called on the trailing edge of the timeout. Subsequent calls to the
|
||
|
|
* throttled function will return the result of the last `func` call.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Function} func The function to throttle.
|
||
|
|
* @param {Number} wait The number of milliseconds to throttle executions to.
|
||
|
|
* @returns {Function} Returns the new throttled function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var throttled = _.throttle(updatePosition, 100);
|
||
|
|
* jQuery(window).on('scroll', throttled);
|
||
|
|
*/
|
||
|
|
function throttle(func, wait) {
|
||
|
|
var args,
|
||
|
|
result,
|
||
|
|
thisArg,
|
||
|
|
timeoutId,
|
||
|
|
lastCalled = 0;
|
||
|
|
|
||
|
|
function trailingCall() {
|
||
|
|
lastCalled = new Date;
|
||
|
|
timeoutId = null;
|
||
|
|
result = func.apply(thisArg, args);
|
||
|
|
}
|
||
|
|
return function() {
|
||
|
|
var now = new Date,
|
||
|
|
remaining = wait - (now - lastCalled);
|
||
|
|
|
||
|
|
args = arguments;
|
||
|
|
thisArg = this;
|
||
|
|
|
||
|
|
if (remaining <= 0) {
|
||
|
|
clearTimeout(timeoutId);
|
||
|
|
timeoutId = null;
|
||
|
|
lastCalled = now;
|
||
|
|
result = func.apply(thisArg, args);
|
||
|
|
}
|
||
|
|
else if (!timeoutId) {
|
||
|
|
timeoutId = setTimeout(trailingCall, remaining);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a function that passes `value` to the `wrapper` function as its
|
||
|
|
* first argument. Additional arguments passed to the function are appended
|
||
|
|
* to those passed to the `wrapper` function. The `wrapper` is executed with
|
||
|
|
* the `this` binding of the created function.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Functions
|
||
|
|
* @param {Mixed} value The value to wrap.
|
||
|
|
* @param {Function} wrapper The wrapper function.
|
||
|
|
* @returns {Function} Returns the new function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var hello = function(name) { return 'hello ' + name; };
|
||
|
|
* hello = _.wrap(hello, function(func) {
|
||
|
|
* return 'before, ' + func('moe') + ', after';
|
||
|
|
* });
|
||
|
|
* hello();
|
||
|
|
* // => 'before, hello moe, after'
|
||
|
|
*/
|
||
|
|
function wrap(value, wrapper) {
|
||
|
|
return function() {
|
||
|
|
var args = [value];
|
||
|
|
push.apply(args, arguments);
|
||
|
|
return wrapper.apply(this, args);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Converts the characters `&`, `<`, `>`, `"`, and `'` in `string` to their
|
||
|
|
* corresponding HTML entities.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {String} string The string to escape.
|
||
|
|
* @returns {String} Returns the escaped string.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.escape('Moe, Larry & Curly');
|
||
|
|
* // => 'Moe, Larry & Curly'
|
||
|
|
*/
|
||
|
|
function escape(string) {
|
||
|
|
return string == null ? '' : (string + '').replace(reUnescapedHtml, escapeHtmlChar);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* This function returns the first argument passed to it.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {Mixed} value Any value.
|
||
|
|
* @returns {Mixed} Returns `value`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var moe = { 'name': 'moe' };
|
||
|
|
* moe === _.identity(moe);
|
||
|
|
* // => true
|
||
|
|
*/
|
||
|
|
function identity(value) {
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds functions properties of `object` to the `lodash` function and chainable
|
||
|
|
* wrapper.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {Object} object The object of function properties to add to `lodash`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.mixin({
|
||
|
|
* 'capitalize': function(string) {
|
||
|
|
* return string.charAt(0).toUpperCase() + string.slice(1).toLowerCase();
|
||
|
|
* }
|
||
|
|
* });
|
||
|
|
*
|
||
|
|
* _.capitalize('moe');
|
||
|
|
* // => 'Moe'
|
||
|
|
*
|
||
|
|
* _('moe').capitalize();
|
||
|
|
* // => 'Moe'
|
||
|
|
*/
|
||
|
|
function mixin(object) {
|
||
|
|
forEach(functions(object), function(methodName) {
|
||
|
|
var func = lodash[methodName] = object[methodName];
|
||
|
|
|
||
|
|
lodash.prototype[methodName] = function() {
|
||
|
|
var args = [this.__wrapped__];
|
||
|
|
push.apply(args, arguments);
|
||
|
|
return new lodash(func.apply(lodash, args));
|
||
|
|
};
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reverts the '_' variable to its previous value and returns a reference to
|
||
|
|
* the `lodash` function.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @returns {Function} Returns the `lodash` function.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var lodash = _.noConflict();
|
||
|
|
*/
|
||
|
|
function noConflict() {
|
||
|
|
window._ = oldDash;
|
||
|
|
return this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Produces a random number between `min` and `max` (inclusive). If only one
|
||
|
|
* argument is passed, a number between `0` and the given number will be returned.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {Number} [min=0] The minimum possible value.
|
||
|
|
* @param {Number} [max=1] The maximum possible value.
|
||
|
|
* @returns {Number} Returns a random number.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.random(0, 5);
|
||
|
|
* // => a number between 0 and 5
|
||
|
|
*
|
||
|
|
* _.random(5);
|
||
|
|
* // => also a number between 0 and 5
|
||
|
|
*/
|
||
|
|
function random(min, max) {
|
||
|
|
if (min == null && max == null) {
|
||
|
|
max = 1;
|
||
|
|
}
|
||
|
|
min = +min || 0;
|
||
|
|
if (max == null) {
|
||
|
|
max = min;
|
||
|
|
min = 0;
|
||
|
|
}
|
||
|
|
return min + floor(nativeRandom() * ((+max || 0) - min + 1));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Resolves the value of `property` on `object`. If `property` is a function,
|
||
|
|
* it will be invoked and its result returned, else the property value is
|
||
|
|
* returned. If `object` is falsey, then `null` is returned.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {Object} object The object to inspect.
|
||
|
|
* @param {String} property The property to get the value of.
|
||
|
|
* @returns {Mixed} Returns the resolved value.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* var object = {
|
||
|
|
* 'cheese': 'crumpets',
|
||
|
|
* 'stuff': function() {
|
||
|
|
* return 'nonsense';
|
||
|
|
* }
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* _.result(object, 'cheese');
|
||
|
|
* // => 'crumpets'
|
||
|
|
*
|
||
|
|
* _.result(object, 'stuff');
|
||
|
|
* // => 'nonsense'
|
||
|
|
*/
|
||
|
|
function result(object, property) {
|
||
|
|
var value = object ? object[property] : undefined;
|
||
|
|
return isFunction(value) ? object[property]() : value;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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
|
||
|
|
*
|
||
|
|
* Note: Lo-Dash may be used in Chrome extensions by either creating a `lodash csp`
|
||
|
|
* build and using precompiled templates, or loading Lo-Dash in a sandbox.
|
||
|
|
*
|
||
|
|
* For more information on precompiling templates see:
|
||
|
|
* http://lodash.com/#custom-builds
|
||
|
|
*
|
||
|
|
* For more information on Chrome extension sandboxes see:
|
||
|
|
* http://developer.chrome.com/stable/extensions/sandboxingEval.html
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {String} text The template text.
|
||
|
|
* @param {Obect} data The data object used to populate the text.
|
||
|
|
* @param {Object} options The options object.
|
||
|
|
* escape - The "escape" delimiter regexp.
|
||
|
|
* evaluate - The "evaluate" delimiter regexp.
|
||
|
|
* interpolate - The "interpolate" delimiter regexp.
|
||
|
|
* sourceURL - The sourceURL of the template's compiled source.
|
||
|
|
* 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
|
||
|
|
*
|
||
|
|
* // using a compiled template
|
||
|
|
* var compiled = _.template('hello <%= name %>');
|
||
|
|
* compiled({ 'name': 'moe' });
|
||
|
|
* // => 'hello moe'
|
||
|
|
*
|
||
|
|
* var list = '<% _.forEach(people, function(name) { %><li><%= name %></li><% }); %>';
|
||
|
|
* _.template(list, { 'people': ['moe', 'larry'] });
|
||
|
|
* // => '<li>moe</li><li>larry</li>'
|
||
|
|
*
|
||
|
|
* // using the "escape" delimiter to escape HTML in data property values
|
||
|
|
* _.template('<b><%- value %></b>', { 'value': '<script>' });
|
||
|
|
* // => '<b><script></b>'
|
||
|
|
*
|
||
|
|
* // using the ES6 delimiter as an alternative to the default "interpolate" delimiter
|
||
|
|
* _.template('hello ${ name }', { 'name': 'curly' });
|
||
|
|
* // => 'hello curly'
|
||
|
|
*
|
||
|
|
* // using the internal `print` function in "evaluate" delimiters
|
||
|
|
* _.template('<% print("hello " + epithet); %>!', { 'epithet': 'stooge' });
|
||
|
|
* // => 'hello stooge!'
|
||
|
|
*
|
||
|
|
* // using custom template delimiters
|
||
|
|
* _.templateSettings = {
|
||
|
|
* 'interpolate': /{{([\s\S]+?)}}/g
|
||
|
|
* };
|
||
|
|
*
|
||
|
|
* _.template('hello {{ name }}!', { 'name': 'mustache' });
|
||
|
|
* // => 'hello mustache!'
|
||
|
|
*
|
||
|
|
* // 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
|
||
|
|
*
|
||
|
|
* // 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;
|
||
|
|
* }
|
||
|
|
*
|
||
|
|
* // 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 + '\
|
||
|
|
* };\
|
||
|
|
* ');
|
||
|
|
*/
|
||
|
|
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 || (text = '');
|
||
|
|
|
||
|
|
// avoid missing dependencies when `iteratorTemplate` is not defined
|
||
|
|
options = defaults({}, options, settings);
|
||
|
|
|
||
|
|
var imports = defaults({}, options.imports, settings.imports),
|
||
|
|
importsKeys = keys(imports),
|
||
|
|
importsValues = values(imports);
|
||
|
|
|
||
|
|
var isEvaluating,
|
||
|
|
index = 0,
|
||
|
|
interpolate = options.interpolate || reNoMatch,
|
||
|
|
source = "__p += '";
|
||
|
|
|
||
|
|
// compile 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 and the template contains "evaluate"
|
||
|
|
// delimiters, 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 and wrap in a multi-line comment to
|
||
|
|
// avoid issues with Narwhal, IE conditional compilation, and the JS engine
|
||
|
|
// embedded in Adobe products.
|
||
|
|
// 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 via 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;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Executes the `callback` function `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 Utilities
|
||
|
|
* @param {Number} n The number of times to execute the callback.
|
||
|
|
* @param {Function} callback The function called per iteration.
|
||
|
|
* @param {Mixed} [thisArg] The `this` binding of `callback`.
|
||
|
|
* @returns {Array} Returns a new array of the results of each `callback` execution.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* 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(3, function(n) { this.cast(n); }, mage);
|
||
|
|
* // => also calls `mage.castSpell(n)` three times
|
||
|
|
*/
|
||
|
|
function times(n, callback, thisArg) {
|
||
|
|
n = +n || 0;
|
||
|
|
var index = -1,
|
||
|
|
result = Array(n);
|
||
|
|
|
||
|
|
while (++index < n) {
|
||
|
|
result[index] = callback.call(thisArg, index);
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The opposite of `_.escape`, this method converts the HTML entities
|
||
|
|
* `&`, `<`, `>`, `"`, and `'` in `string` to their
|
||
|
|
* corresponding characters.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {String} string The string to unescape.
|
||
|
|
* @returns {String} Returns the unescaped string.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.unescape('Moe, Larry & Curly');
|
||
|
|
* // => 'Moe, Larry & Curly'
|
||
|
|
*/
|
||
|
|
function unescape(string) {
|
||
|
|
return string == null ? '' : (string + '').replace(reEscapedHtml, unescapeHtmlChar);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Generates a unique ID. If `prefix` is passed, the ID will be appended to it.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @category Utilities
|
||
|
|
* @param {String} [prefix] The value to prefix the ID with.
|
||
|
|
* @returns {String} Returns the unique ID.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _.uniqueId('contact_');
|
||
|
|
* // => 'contact_104'
|
||
|
|
*
|
||
|
|
* _.uniqueId();
|
||
|
|
* // => '105'
|
||
|
|
*/
|
||
|
|
function uniqueId(prefix) {
|
||
|
|
var id = ++idCounter;
|
||
|
|
return (prefix == null ? '' : prefix + '') + id;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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 Chaining
|
||
|
|
* @param {Mixed} value The value to pass to `interceptor`.
|
||
|
|
* @param {Function} interceptor The function to invoke.
|
||
|
|
* @returns {Mixed} Returns `value`.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _([1, 2, 3, 4])
|
||
|
|
* .filter(function(num) { return num % 2 == 0; })
|
||
|
|
* .tap(alert)
|
||
|
|
* .map(function(num) { return num * num; })
|
||
|
|
* .value();
|
||
|
|
* // => // [2, 4] (alerted)
|
||
|
|
* // => [4, 16]
|
||
|
|
*/
|
||
|
|
function tap(value, interceptor) {
|
||
|
|
interceptor(value);
|
||
|
|
return value;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Produces the `toString` result of the wrapped value.
|
||
|
|
*
|
||
|
|
* @name toString
|
||
|
|
* @memberOf _
|
||
|
|
* @category Chaining
|
||
|
|
* @returns {String} Returns the string result.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _([1, 2, 3]).toString();
|
||
|
|
* // => '1,2,3'
|
||
|
|
*/
|
||
|
|
function wrapperToString() {
|
||
|
|
return this.__wrapped__ + '';
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Extracts the wrapped value.
|
||
|
|
*
|
||
|
|
* @name valueOf
|
||
|
|
* @memberOf _
|
||
|
|
* @alias value
|
||
|
|
* @category Chaining
|
||
|
|
* @returns {Mixed} Returns the wrapped value.
|
||
|
|
* @example
|
||
|
|
*
|
||
|
|
* _([1, 2, 3]).valueOf();
|
||
|
|
* // => [1, 2, 3]
|
||
|
|
*/
|
||
|
|
function wrapperValueOf() {
|
||
|
|
return this.__wrapped__;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
// add functions that return wrapped values when chaining
|
||
|
|
lodash.after = after;
|
||
|
|
lodash.assign = assign;
|
||
|
|
lodash.at = at;
|
||
|
|
lodash.bind = bind;
|
||
|
|
lodash.bindAll = bindAll;
|
||
|
|
lodash.bindKey = bindKey;
|
||
|
|
lodash.compact = compact;
|
||
|
|
lodash.compose = compose;
|
||
|
|
lodash.countBy = countBy;
|
||
|
|
lodash.debounce = debounce;
|
||
|
|
lodash.defaults = defaults;
|
||
|
|
lodash.defer = defer;
|
||
|
|
lodash.delay = delay;
|
||
|
|
lodash.difference = difference;
|
||
|
|
lodash.filter = filter;
|
||
|
|
lodash.flatten = flatten;
|
||
|
|
lodash.forEach = forEach;
|
||
|
|
lodash.forIn = forIn;
|
||
|
|
lodash.forOwn = forOwn;
|
||
|
|
lodash.functions = functions;
|
||
|
|
lodash.groupBy = groupBy;
|
||
|
|
lodash.initial = initial;
|
||
|
|
lodash.intersection = intersection;
|
||
|
|
lodash.invert = invert;
|
||
|
|
lodash.invoke = invoke;
|
||
|
|
lodash.keys = keys;
|
||
|
|
lodash.map = map;
|
||
|
|
lodash.max = max;
|
||
|
|
lodash.memoize = memoize;
|
||
|
|
lodash.merge = merge;
|
||
|
|
lodash.min = min;
|
||
|
|
lodash.object = object;
|
||
|
|
lodash.omit = omit;
|
||
|
|
lodash.once = once;
|
||
|
|
lodash.pairs = pairs;
|
||
|
|
lodash.partial = partial;
|
||
|
|
lodash.partialRight = partialRight;
|
||
|
|
lodash.pick = pick;
|
||
|
|
lodash.pluck = pluck;
|
||
|
|
lodash.range = range;
|
||
|
|
lodash.reject = reject;
|
||
|
|
lodash.rest = rest;
|
||
|
|
lodash.shuffle = shuffle;
|
||
|
|
lodash.sortBy = sortBy;
|
||
|
|
lodash.tap = tap;
|
||
|
|
lodash.throttle = throttle;
|
||
|
|
lodash.times = times;
|
||
|
|
lodash.toArray = toArray;
|
||
|
|
lodash.union = union;
|
||
|
|
lodash.uniq = uniq;
|
||
|
|
lodash.values = values;
|
||
|
|
lodash.where = where;
|
||
|
|
lodash.without = without;
|
||
|
|
lodash.wrap = wrap;
|
||
|
|
lodash.zip = zip;
|
||
|
|
|
||
|
|
// add aliases
|
||
|
|
lodash.collect = map;
|
||
|
|
lodash.drop = rest;
|
||
|
|
lodash.each = forEach;
|
||
|
|
lodash.extend = assign;
|
||
|
|
lodash.methods = functions;
|
||
|
|
lodash.select = filter;
|
||
|
|
lodash.tail = rest;
|
||
|
|
lodash.unique = uniq;
|
||
|
|
|
||
|
|
// add functions to `lodash.prototype`
|
||
|
|
mixin(lodash);
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
// add functions that return unwrapped values when chaining
|
||
|
|
lodash.clone = clone;
|
||
|
|
lodash.cloneDeep = cloneDeep;
|
||
|
|
lodash.contains = contains;
|
||
|
|
lodash.escape = escape;
|
||
|
|
lodash.every = every;
|
||
|
|
lodash.find = find;
|
||
|
|
lodash.has = has;
|
||
|
|
lodash.identity = identity;
|
||
|
|
lodash.indexOf = indexOf;
|
||
|
|
lodash.isArguments = isArguments;
|
||
|
|
lodash.isArray = isArray;
|
||
|
|
lodash.isBoolean = isBoolean;
|
||
|
|
lodash.isDate = isDate;
|
||
|
|
lodash.isElement = isElement;
|
||
|
|
lodash.isEmpty = isEmpty;
|
||
|
|
lodash.isEqual = isEqual;
|
||
|
|
lodash.isFinite = isFinite;
|
||
|
|
lodash.isFunction = isFunction;
|
||
|
|
lodash.isNaN = isNaN;
|
||
|
|
lodash.isNull = isNull;
|
||
|
|
lodash.isNumber = isNumber;
|
||
|
|
lodash.isObject = isObject;
|
||
|
|
lodash.isPlainObject = isPlainObject;
|
||
|
|
lodash.isRegExp = isRegExp;
|
||
|
|
lodash.isString = isString;
|
||
|
|
lodash.isUndefined = isUndefined;
|
||
|
|
lodash.lastIndexOf = lastIndexOf;
|
||
|
|
lodash.mixin = mixin;
|
||
|
|
lodash.noConflict = noConflict;
|
||
|
|
lodash.random = random;
|
||
|
|
lodash.reduce = reduce;
|
||
|
|
lodash.reduceRight = reduceRight;
|
||
|
|
lodash.result = result;
|
||
|
|
lodash.size = size;
|
||
|
|
lodash.some = some;
|
||
|
|
lodash.sortedIndex = sortedIndex;
|
||
|
|
lodash.template = template;
|
||
|
|
lodash.unescape = unescape;
|
||
|
|
lodash.uniqueId = uniqueId;
|
||
|
|
|
||
|
|
// add aliases
|
||
|
|
lodash.all = every;
|
||
|
|
lodash.any = some;
|
||
|
|
lodash.detect = find;
|
||
|
|
lodash.foldl = reduce;
|
||
|
|
lodash.foldr = reduceRight;
|
||
|
|
lodash.include = contains;
|
||
|
|
lodash.inject = reduce;
|
||
|
|
|
||
|
|
forOwn(lodash, function(func, methodName) {
|
||
|
|
if (!lodash.prototype[methodName]) {
|
||
|
|
lodash.prototype[methodName] = function() {
|
||
|
|
var args = [this.__wrapped__];
|
||
|
|
push.apply(args, arguments);
|
||
|
|
return func.apply(lodash, args);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
// add functions capable of returning wrapped and unwrapped values when chaining
|
||
|
|
lodash.first = first;
|
||
|
|
lodash.last = last;
|
||
|
|
|
||
|
|
// add aliases
|
||
|
|
lodash.take = first;
|
||
|
|
lodash.head = first;
|
||
|
|
|
||
|
|
forOwn(lodash, function(func, methodName) {
|
||
|
|
if (!lodash.prototype[methodName]) {
|
||
|
|
lodash.prototype[methodName]= function(callback, thisArg) {
|
||
|
|
var result = func(this.__wrapped__, callback, thisArg);
|
||
|
|
return callback == null || (thisArg && typeof callback != 'function')
|
||
|
|
? result
|
||
|
|
: new lodash(result);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The semantic version number.
|
||
|
|
*
|
||
|
|
* @static
|
||
|
|
* @memberOf _
|
||
|
|
* @type String
|
||
|
|
*/
|
||
|
|
lodash.VERSION = '1.0.2';
|
||
|
|
|
||
|
|
// add "Chaining" functions to the wrapper
|
||
|
|
lodash.prototype.toString = wrapperToString;
|
||
|
|
lodash.prototype.value = wrapperValueOf;
|
||
|
|
lodash.prototype.valueOf = wrapperValueOf;
|
||
|
|
|
||
|
|
// add `Array` functions that return unwrapped values
|
||
|
|
each(['join', 'pop', 'shift'], function(methodName) {
|
||
|
|
var func = arrayRef[methodName];
|
||
|
|
lodash.prototype[methodName] = function() {
|
||
|
|
return func.apply(this.__wrapped__, arguments);
|
||
|
|
};
|
||
|
|
});
|
||
|
|
|
||
|
|
// add `Array` functions that return the wrapped value
|
||
|
|
each(['push', 'reverse', 'sort', 'unshift'], function(methodName) {
|
||
|
|
var func = arrayRef[methodName];
|
||
|
|
lodash.prototype[methodName] = function() {
|
||
|
|
func.apply(this.__wrapped__, arguments);
|
||
|
|
return this;
|
||
|
|
};
|
||
|
|
});
|
||
|
|
|
||
|
|
// add `Array` functions that return new wrapped values
|
||
|
|
each(['concat', 'slice', 'splice'], function(methodName) {
|
||
|
|
var func = arrayRef[methodName];
|
||
|
|
lodash.prototype[methodName] = function() {
|
||
|
|
return new lodash(func.apply(this.__wrapped__, arguments));
|
||
|
|
};
|
||
|
|
});
|
||
|
|
|
||
|
|
// avoid array-like object bugs with `Array#shift` and `Array#splice`
|
||
|
|
// in Firefox < 10 and IE < 9
|
||
|
|
if (hasObjectSpliceBug) {
|
||
|
|
each(['pop', 'shift', 'splice'], function(methodName) {
|
||
|
|
var func = arrayRef[methodName],
|
||
|
|
isSplice = methodName == 'splice';
|
||
|
|
|
||
|
|
lodash.prototype[methodName] = function() {
|
||
|
|
var value = this.__wrapped__,
|
||
|
|
result = func.apply(value, arguments);
|
||
|
|
|
||
|
|
if (value.length === 0) {
|
||
|
|
delete value[0];
|
||
|
|
}
|
||
|
|
return isSplice ? new lodash(result) : result;
|
||
|
|
};
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
/*--------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
// expose Lo-Dash
|
||
|
|
// some AMD build optimizers, like r.js, check for specific condition patterns like the following:
|
||
|
|
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
|
||
|
|
// Expose Lo-Dash to the global object even when an AMD loader is present in
|
||
|
|
// case Lo-Dash was injected by a third-party script and not intended to be
|
||
|
|
// loaded as a module. The global assignment can be reverted in the Lo-Dash
|
||
|
|
// module via its `noConflict()` method.
|
||
|
|
window._ = lodash;
|
||
|
|
|
||
|
|
// define as an anonymous module so, through path mapping, it can be
|
||
|
|
// referenced as the "underscore" module
|
||
|
|
define(function() {
|
||
|
|
return lodash;
|
||
|
|
});
|
||
|
|
}
|
||
|
|
// check for `exports` after `define` in case a build optimizer adds an `exports` object
|
||
|
|
else if (freeExports) {
|
||
|
|
// in Node.js or RingoJS v0.8.0+
|
||
|
|
if (freeModule) {
|
||
|
|
(freeModule.exports = lodash)._ = lodash;
|
||
|
|
}
|
||
|
|
// in Narwhal or RingoJS v0.7.0-
|
||
|
|
else {
|
||
|
|
freeExports._ = lodash;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
// in a browser or Rhino
|
||
|
|
window._ = lodash;
|
||
|
|
}
|
||
|
|
}(this));
|