diff --git a/clientapp/app.js b/clientapp/app.js
index d1226d5..f654a76 100644
--- a/clientapp/app.js
+++ b/clientapp/app.js
@@ -31,24 +31,16 @@ module.exports = {
new Router();
app.history = Backbone.history;
- if (!localStorage.config) {
- return app.navigate('signin');
- }
-
app.view = new MainView({
model: me,
el: document.body
});
app.view.render();
- var rosterVer = localStorage.rosterVersion;
- var config = JSON.parse(localStorage.config);
-
- config.rosterVer = rosterVer;
-
- var client = window.client = app.client = XMPP.createClient(config);
+ var client = window.client = app.client = XMPP.createClient({
+ rosterVer: localStorage.rosterVersion || undefined
+ });
xmppEventHandlers(client, app);
- client.connect();
// we have what we need, we can now start our router and show the appropriate page
app.history.start({pushState: true, root: '/'});
diff --git a/clientapp/helpers/xmppEventHandlers.js b/clientapp/helpers/xmppEventHandlers.js
index 4ca2171..b06a042 100644
--- a/clientapp/helpers/xmppEventHandlers.js
+++ b/clientapp/helpers/xmppEventHandlers.js
@@ -4,50 +4,16 @@
var crypto = XMPP.crypto;
var _ = require('underscore');
+var log = require('andlog');
var Contact = require('../models/contact');
var Resource = require('../models/resource');
var Message = require('../models/message');
-function logScroll() {
- window.scrollTo(0, document.body.scrollHeight);
-}
-
-function log(name, data) {
- var container = document.getElementById('log');
- var logEntry = document.createElement('div'),
- header = document.createElement('h2'),
- entry = document.createElement('p'),
- altEntry = document.createElement('p');
-
- header.textContent = name;
- logEntry.appendChild(header);
-
- if (data && data.toJSON) {
- var codeJSON = document.createElement('code');
- codeJSON.textContent = JSON.stringify(data.toJSON());
-
- altEntry.appendChild(codeJSON);
- logEntry.appendChild(altEntry);
- logEntry.appendChild(document.createElement('hr'));
- }
-
- var codeData = document.createElement('code');
- codeData.textContent = data;
- entry.appendChild(codeData);
- logEntry.appendChild(entry);
-
- if (container) {
- container.appendChild(logEntry);
- _.throttle(logScroll, 300);
- }
-}
-
-
module.exports = function (client, app) {
client.on('*', function (name, data) {
- log(name, data);
+ log.debug(name, data);
});
client.on('session:started', function (jid) {
@@ -157,13 +123,14 @@ module.exports = function (client, app) {
message.cid = msg.id;
message.set(msg);
- if (msg.archived) {
- msg.archived.forEach(function (archived) {
- if (me.isMe(archived.by)) {
- message.id = archived.id;
- }
- });
- }
+ //if (msg.archived) {
+ // msg.archived.forEach(function (archived) {
+ // if (me.isMe(archived.by)) {
+ // message.id = archived.id;
+ // message.cid = msg.id;
+ // }
+ // });
+ //}
contact.messages.add(message);
if (!contact.lockedResource) {
diff --git a/clientapp/libraries/stanza.io.js b/clientapp/libraries/stanza.io.js
index a911814..8657e05 100644
--- a/clientapp/libraries/stanza.io.js
+++ b/clientapp/libraries/stanza.io.js
@@ -2878,20 +2878,8 @@ Prefs.prototype = {
};
-
-
-stanza.extend(Iq, MAMQuery);
-stanza.extend(Iq, Prefs);
-stanza.extend(Message, Result);
-stanza.extend(Result, Forwarded);
-stanza.extend(MAMQuery, RSM);
-
-
Message.prototype.__defineGetter__('archived', function () {
- var self = this;
-
- var archives = stanza.find(this.xml, 'urn:xmpp:mam:tmp', 'archived');
-
+ var archives = stanza.find(this.xml, this.NS, 'archived');
var results = [];
archives.forEach(function (archive) {
results.push({
@@ -2899,20 +2887,15 @@ Message.prototype.__defineGetter__('archived', function () {
id: stanza.getAttribute(archive, 'id')
});
});
-
return results;
});
-Message.prototype.__defineSetter__('archived', function (value) {
- var self = this;
- value.forEach(function (val) {
- var archive = document.createElementNS('urn:xmpp:mam:tmp', 'archived');
- stanza.setAttribute(archive, 'by', val.by);
- stanza.setAttribute(archive, 'id', val.id);
- self.xml.appendChild(archive);
- });
-});
+stanza.extend(Iq, MAMQuery);
+stanza.extend(Iq, Prefs);
+stanza.extend(Message, Result);
+stanza.extend(Result, Forwarded);
+stanza.extend(MAMQuery, RSM);
exports.MAMQuery = MAMQuery;
exports.Result = Result;
@@ -4497,6 +4480,8 @@ EntityTime.prototype = {
toString: stanza.toString,
toJSON: stanza.toJSON,
get tzo() {
+ console.log(this.toString());
+ console.log(this.parent.toString());
var split, hrs, min;
var sign = -1;
var formatted = stanza.getSubText(this.xml, this.NS, 'tzo');
@@ -4506,11 +4491,14 @@ EntityTime.prototype = {
}
if (formatted.charAt(0) === '-') {
sign = 1;
- formatted.slice(1);
+ formatted = formatted.slice(1);
}
split = formatted.split(':');
+ console.log(split);
hrs = parseInt(split[0], 10);
min = parseInt(split[1], 10);
+ console.log('hrs', hrs);
+ console.log('min', min);
return (hrs * 60 + min) * sign;
},
set tzo(value) {
@@ -13273,7 +13261,7 @@ try{V.nodeClass=!($.call(document)==x&&!({toString:0}+""))}catch(n){V.nodeClass=
var n=typeof t;if("function"!=n){if("object"!=n)return function(r){return r[t]};var o=W(t);return function(r){for(var e=o.length,n=!1;e--&&(n=c(r[o[e]],t[o[e]],h)););return n}}return typeof r=="undefined"||b&&!b.test(N.call(t))?t:1===e?function(e){return t.call(r,e)}:2===e?function(e,n){return t.call(r,e,n)}:4===e?function(e,n,o,u){return t.call(r,e,n,o,u)}:function(e,n,o){return t.call(r,e,n,o)}},o.forEach=s,o.forIn=Y,o.keys=W,o.each=s,o.extend=G,o.identity=p,o.isArguments=a,o.isArray=Q,o.isEqual=c,o.isFunction=f,o.isObject=i,o.isString=l,o.VERSION="1.3.1",typeof define=="function"&&typeof define.amd=="object"&&define.amd?(t._=o, define(function(){return o
})):P&&!P.nodeType?I?(I.exports=o)._=o:P._=o:t._=o}(this);
},{}],74:[function(require,module,exports){
-var _ = require('lodash');
+var _ = require('./vendor/lodash');
var serializer = new XMLSerializer();
var XML_NS = 'http://www.w3.org/XML/1998/namespace';
var TOP_LEVEL_LOOKUP = {};
@@ -13299,9 +13287,9 @@ exports.findOrCreate = function (xml, NS, selector) {
}
};
-exports.init = function (self, xml, data, parentNS) {
+exports.init = function (self, xml, data) {
self.xml = xml || document.createElementNS(self.NS, self.EL);
- if (parentNS && parentNS !== self.NS || !self.xml.parentNode || self.xml.parentNode.namespaceURI !== self.NS) {
+ if (!self.xml.parentNode || self.xml.parentNode.namespaceURI !== self.NS) {
self.xml.setAttribute('xmlns', self.NS);
}
@@ -13607,4991 +13595,26 @@ exports.TOP_LEVEL_LOOKUP = TOP_LEVEL_LOOKUP;
exports.LOOKUP_EXT = LOOKUP_EXT;
exports.LOOKUP = LOOKUP;
-},{"lodash":75}],75:[function(require,module,exports){
+},{"./vendor/lodash":75}],75:[function(require,module,exports){
var global=self;/**
* @license
- * Lo-Dash 1.0.1 (Custom Build)
- * Build: `lodash modern -o ./dist/lodash.js`
- * Copyright 2012-2013 The Dojo Foundation
- * Based on Underscore.js 1.4.4
- * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud Inc.
- * Available under MIT license
+ * Lo-Dash 1.3.1 (Custom Build) lodash.com/license
+ * Build: `lodash include="each,extend,filter"`
+ * Underscore.js 1.4.4 underscorejs.org/LICENSE
*/
-;(function(window, undefined) {
-
- /** Detect free variable `exports` */
- var freeExports = typeof exports == 'object' && exports;
-
- /** Detect free variable `module` */
- var freeModule = typeof module == 'object' && module && module.exports == freeExports && module;
-
- /** Detect free variable `global` and use it as `window` */
- var freeGlobal = typeof global == 'object' && global;
- if (freeGlobal.global === freeGlobal) {
- window = freeGlobal;
- }
-
- /** Used for array and object method references */
- var arrayRef = [],
- objectRef = {};
-
- /** Used to generate unique IDs */
- var idCounter = 0;
-
- /** Used internally to indicate various things */
- var indicatorObject = objectRef;
-
- /** Used by `cachedContains` as the default size when optimizations are enabled for large arrays */
- var largeArraySize = 30;
-
- /** Used to restore the original `_` reference in `noConflict` */
- var oldDash = window._;
-
- /** Used to match HTML entities */
- var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g;
-
- /** Used to match empty string literals in compiled template source */
- var reEmptyStringLeading = /\b__p \+= '';/g,
- reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
- reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
-
- /** Used to match regexp flags from their coerced string values */
- var reFlags = /\w*$/;
-
- /** Used to detect if a method is native */
- var reNative = RegExp('^' +
- (objectRef.valueOf + '')
- .replace(/[.*+?^${}()|[\]\\]/g, '\\$&')
- .replace(/valueOf|for [^\]]+/g, '.+?') + '$'
- );
-
- /**
- * Used to match ES6 template delimiters
- * http://people.mozilla.org/~jorendorff/es6-draft.html#sec-7.8.6
- */
- var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
-
- /** Used to match "interpolate" template delimiters */
- var reInterpolate = /<%=([\s\S]+?)%>/g;
-
- /** Used to ensure capturing order of template delimiters */
- var reNoMatch = /($^)/;
-
- /** Used to match HTML characters */
- var reUnescapedHtml = /[&<>"']/g;
-
- /** Used to match unescaped characters in compiled string literals */
- var reUnescapedString = /['\n\r\t\u2028\u2029\\]/g;
-
- /** Used to make template sourceURLs easier to identify */
- var templateCounter = 0;
-
- /** Native method shortcuts */
- var ceil = Math.ceil,
- concat = arrayRef.concat,
- floor = Math.floor,
- getPrototypeOf = reNative.test(getPrototypeOf = Object.getPrototypeOf) && getPrototypeOf,
- hasOwnProperty = objectRef.hasOwnProperty,
- push = arrayRef.push,
- toString = objectRef.toString;
-
- /* Native method shortcuts for methods with the same name as other `lodash` methods */
- var nativeBind = reNative.test(nativeBind = slice.bind) && nativeBind,
- nativeIsArray = reNative.test(nativeIsArray = Array.isArray) && nativeIsArray,
- nativeIsFinite = window.isFinite,
- nativeIsNaN = window.isNaN,
- nativeKeys = reNative.test(nativeKeys = Object.keys) && nativeKeys,
- nativeMax = Math.max,
- nativeMin = Math.min,
- nativeRandom = Math.random;
-
- /** `Object#toString` result shortcuts */
- var argsClass = '[object Arguments]',
- arrayClass = '[object Array]',
- boolClass = '[object Boolean]',
- dateClass = '[object Date]',
- funcClass = '[object Function]',
- numberClass = '[object Number]',
- objectClass = '[object Object]',
- regexpClass = '[object RegExp]',
- stringClass = '[object String]';
-
- /** Detect various environments */
- var isIeOpera = !!window.attachEvent,
- isV8 = nativeBind && !/\n|true/.test(nativeBind + isIeOpera);
-
- /* Detect if `Function#bind` exists and is inferred to be fast (all but V8) */
- var isBindFast = nativeBind && !isV8;
-
- /* Detect if `Object.keys` exists and is inferred to be fast (IE, Opera, V8) */
- var isKeysFast = nativeKeys && (isIeOpera || isV8);
-
- /** Used to identify object classifications that `_.clone` supports */
- var cloneableClasses = {};
- cloneableClasses[funcClass] = false;
- cloneableClasses[argsClass] = cloneableClasses[arrayClass] =
- cloneableClasses[boolClass] = cloneableClasses[dateClass] =
- cloneableClasses[numberClass] = cloneableClasses[objectClass] =
- cloneableClasses[regexpClass] = cloneableClasses[stringClass] = true;
-
- /** Used to lookup a built-in constructor by [[Class]] */
- var ctorByClass = {};
- ctorByClass[arrayClass] = Array;
- ctorByClass[boolClass] = Boolean;
- ctorByClass[dateClass] = Date;
- ctorByClass[objectClass] = Object;
- ctorByClass[numberClass] = Number;
- ctorByClass[regexpClass] = RegExp;
- ctorByClass[stringClass] = String;
-
- /** Used to determine if values are of the language type Object */
- var objectTypes = {
- 'boolean': false,
- 'function': true,
- 'object': true,
- 'number': false,
- 'string': false,
- 'undefined': false
- };
-
- /** Used to escape characters for inclusion in compiled string literals */
- var stringEscapes = {
- '\\': '\\',
- "'": "'",
- '\n': 'n',
- '\r': 'r',
- '\t': 't',
- '\u2028': 'u2028',
- '\u2029': 'u2029'
- };
-
- /*--------------------------------------------------------------------------*/
-
- /**
- * Creates a `lodash` object, that wraps the given `value`, to enable method
- * chaining.
- *
- * In addition to Lo-Dash methods, wrappers also have the following `Array` methods:
- * `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`,
- * and `unshift`
- *
- * The chainable wrapper functions are:
- * `after`, `assign`, `bind`, `bindAll`, `bindKey`, `chain`, `compact`, `compose`,
- * `concat`, `countBy`, `debounce`, `defaults`, `defer`, `delay`, `difference`,
- * `filter`, `flatten`, `forEach`, `forIn`, `forOwn`, `functions`, `groupBy`,
- * `initial`, `intersection`, `invert`, `invoke`, `keys`, `map`, `max`, `memoize`,
- * `merge`, `min`, `object`, `omit`, `once`, `pairs`, `partial`, `partialRight`,
- * `pick`, `pluck`, `push`, `range`, `reject`, `rest`, `reverse`, `shuffle`,
- * `slice`, `sort`, `sortBy`, `splice`, `tap`, `throttle`, `times`, `toArray`,
- * `union`, `uniq`, `unshift`, `values`, `where`, `without`, `wrap`, and `zip`
- *
- * The non-chainable wrapper functions are:
- * `clone`, `cloneDeep`, `contains`, `escape`, `every`, `find`, `has`, `identity`,
- * `indexOf`, `isArguments`, `isArray`, `isBoolean`, `isDate`, `isElement`, `isEmpty`,
- * `isEqual`, `isFinite`, `isFunction`, `isNaN`, `isNull`, `isNumber`, `isObject`,
- * `isPlainObject`, `isRegExp`, `isString`, `isUndefined`, `join`, `lastIndexOf`,
- * `mixin`, `noConflict`, `pop`, `random`, `reduce`, `reduceRight`, `result`,
- * `shift`, `size`, `some`, `sortedIndex`, `template`, `unescape`, and `uniqueId`
- *
- * The wrapper functions `first` and `last` return wrapped values when `n` is
- * passed, otherwise they return unwrapped values.
- *
- * @name _
- * @constructor
- * @category Chaining
- * @param {Mixed} value The value to wrap in a `lodash` instance.
- * @returns {Object} Returns a `lodash` instance.
- */
- function lodash(value) {
- // exit early if already wrapped, even if wrapped by a different `lodash` constructor
- if (value && typeof value == 'object' && value.__wrapped__) {
- return value;
- }
- // allow invoking `lodash` without the `new` operator
- if (!(this instanceof lodash)) {
- return new lodash(value);
- }
- this.__wrapped__ = value;
- }
-
- /**
- * By default, the template delimiters used by Lo-Dash are similar to those in
- * embedded Ruby (ERB). Change the following template settings to use alternative
- * delimiters.
- *
- * @static
- * @memberOf _
- * @type Object
- */
- lodash.templateSettings = {
-
- /**
- * Used to detect `data` property values to be HTML-escaped.
- *
- * @memberOf _.templateSettings
- * @type RegExp
- */
- 'escape': /<%-([\s\S]+?)%>/g,
-
- /**
- * Used to detect code to be evaluated.
- *
- * @memberOf _.templateSettings
- * @type RegExp
- */
- 'evaluate': /<%([\s\S]+?)%>/g,
-
- /**
- * Used to detect `data` property values to inject.
- *
- * @memberOf _.templateSettings
- * @type RegExp
- */
- 'interpolate': reInterpolate,
-
- /**
- * Used to reference the data object in the template text.
- *
- * @memberOf _.templateSettings
- * @type String
- */
- 'variable': '',
-
- /**
- * Used to import variables into the compiled template.
- *
- * @memberOf _.templateSettings
- * @type Object
- */
- 'imports': {
-
- /**
- * A reference to the `lodash` function.
- *
- * @memberOf _.templateSettings.imports
- * @type Function
- */
- '_': lodash
- }
- };
-
- /*--------------------------------------------------------------------------*/
-
- /**
- * The template used to create iterator functions.
- *
- * @private
- * @param {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 ) +
- ') {\n while (++index < length) {\n ' +
- (obj.loop ) +
- '\n }\n}\nelse { ';
- } ;
-
- 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 ' +
- (obj.loop ) +
- '\n } ';
- } else {
- __p += '\n for (index in iterable) {';
- if (obj.useHas) {
- __p += '\n if (';
- if (obj.useHas) {
- __p += 'hasOwnProperty.call(iterable, index)';
- } ;
- __p += ') { ';
- } ;
- __p +=
- (obj.loop ) +
- '; ';
- if (obj.useHas) {
- __p += '\n }';
- } ;
- __p += '\n } ';
- } ;
-
- if (obj.arrays) {
- __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
- 'isKeysFast': isKeysFast,
-
- // 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;
- }
-
- /**
- * 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 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 [];
- }
- 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)) || ctor instanceof ctor) {
- // 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]) {
- 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) ||
- (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) {
- return false;
- }
- // in older versions of Opera, `arguments` objects have `Array` constructors
- var ctorA = a.constructor,
- ctorB = 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 = 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);
-
- 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;
- }
- 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 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) { %><%= name %><% }); %>';
- * _.template(list, { 'people': ['moe', 'larry'] });
- * // => 'moelarry'
- *
- * // using the "escape" delimiter to escape HTML in data property values
- * _.template('<%- value %>', { 'value': '