1828 lines
59 KiB
JavaScript
1828 lines
59 KiB
JavaScript
(function (global, factory) {
|
||
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
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typeof define === 'function' && define.amd ? define('underscore', factory) :
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(function() {
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var current = global._;
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var exports = factory();
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global._ = exports;
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exports.noConflict = function() { global._ = current; return exports; };
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||
})();
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}(this, (function () {
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||
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// Underscore.js 1.10.2
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// https://underscorejs.org
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// (c) 2009-2020 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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// Underscore may be freely distributed under the MIT license.
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// Baseline setup
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// --------------
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// Establish the root object, `window` (`self`) in the browser, `global`
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// on the server, or `this` in some virtual machines. We use `self`
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// instead of `window` for `WebWorker` support.
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||
var root = typeof self == 'object' && self.self === self && self ||
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||
typeof global == 'object' && global.global === global && global ||
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Function('return this')() ||
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{};
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// Save bytes in the minified (but not gzipped) version:
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var ArrayProto = Array.prototype, ObjProto = Object.prototype;
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||
var SymbolProto = typeof Symbol !== 'undefined' ? Symbol.prototype : null;
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||
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||
// Create quick reference variables for speed access to core prototypes.
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||
var push = ArrayProto.push,
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slice = ArrayProto.slice,
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||
toString = ObjProto.toString,
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||
hasOwnProperty = ObjProto.hasOwnProperty;
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// All **ECMAScript 5** native function implementations that we hope to use
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// are declared here.
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var nativeIsArray = Array.isArray,
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nativeKeys = Object.keys,
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nativeCreate = Object.create;
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||
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// Create references to these builtin functions because we override them.
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var _isNaN = root.isNaN,
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_isFinite = root.isFinite;
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||
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// Naked function reference for surrogate-prototype-swapping.
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var Ctor = function(){};
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// The Underscore object. All exported functions below are added to it in the
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// modules/index-all.js using the mixin function.
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function _(obj) {
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if (obj instanceof _) return obj;
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if (!(this instanceof _)) return new _(obj);
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this._wrapped = obj;
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}
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// Current version.
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var VERSION = _.VERSION = '1.10.2';
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// Internal function that returns an efficient (for current engines) version
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// of the passed-in callback, to be repeatedly applied in other Underscore
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// functions.
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function optimizeCb(func, context, argCount) {
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if (context === void 0) return func;
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switch (argCount == null ? 3 : argCount) {
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case 1: return function(value) {
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return func.call(context, value);
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};
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// The 2-argument case is omitted because we’re not using it.
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case 3: return function(value, index, collection) {
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return func.call(context, value, index, collection);
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};
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case 4: return function(accumulator, value, index, collection) {
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return func.call(context, accumulator, value, index, collection);
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};
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}
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return function() {
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return func.apply(context, arguments);
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};
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}
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// An internal function to generate callbacks that can be applied to each
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// element in a collection, returning the desired result — either `identity`,
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// an arbitrary callback, a property matcher, or a property accessor.
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function baseIteratee(value, context, argCount) {
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if (value == null) return identity;
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if (isFunction(value)) return optimizeCb(value, context, argCount);
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if (isObject(value) && !isArray(value)) return matcher(value);
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return property(value);
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}
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// External wrapper for our callback generator. Users may customize
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// `_.iteratee` if they want additional predicate/iteratee shorthand styles.
|
||
// This abstraction hides the internal-only argCount argument.
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_.iteratee = iteratee;
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function iteratee(value, context) {
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return baseIteratee(value, context, Infinity);
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||
}
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// The function we actually call internally. It invokes _.iteratee if
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// overridden, otherwise baseIteratee.
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function cb(value, context, argCount) {
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if (_.iteratee !== iteratee) return _.iteratee(value, context);
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return baseIteratee(value, context, argCount);
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||
}
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||
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||
// Some functions take a variable number of arguments, or a few expected
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||
// arguments at the beginning and then a variable number of values to operate
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||
// on. This helper accumulates all remaining arguments past the function’s
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||
// argument length (or an explicit `startIndex`), into an array that becomes
|
||
// the last argument. Similar to ES6’s "rest parameter".
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||
function restArguments(func, startIndex) {
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startIndex = startIndex == null ? func.length - 1 : +startIndex;
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||
return function() {
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||
var length = Math.max(arguments.length - startIndex, 0),
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||
rest = Array(length),
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||
index = 0;
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||
for (; index < length; index++) {
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||
rest[index] = arguments[index + startIndex];
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||
}
|
||
switch (startIndex) {
|
||
case 0: return func.call(this, rest);
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||
case 1: return func.call(this, arguments[0], rest);
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||
case 2: return func.call(this, arguments[0], arguments[1], rest);
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||
}
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var args = Array(startIndex + 1);
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||
for (index = 0; index < startIndex; index++) {
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||
args[index] = arguments[index];
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||
}
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args[startIndex] = rest;
|
||
return func.apply(this, args);
|
||
};
|
||
}
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||
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||
// An internal function for creating a new object that inherits from another.
|
||
function baseCreate(prototype) {
|
||
if (!isObject(prototype)) return {};
|
||
if (nativeCreate) return nativeCreate(prototype);
|
||
Ctor.prototype = prototype;
|
||
var result = new Ctor;
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||
Ctor.prototype = null;
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||
return result;
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||
}
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||
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||
function shallowProperty(key) {
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||
return function(obj) {
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||
return obj == null ? void 0 : obj[key];
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||
};
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||
}
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||
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||
function _has(obj, path) {
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||
return obj != null && hasOwnProperty.call(obj, path);
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||
}
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||
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||
function deepGet(obj, path) {
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||
var length = path.length;
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||
for (var i = 0; i < length; i++) {
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if (obj == null) return void 0;
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obj = obj[path[i]];
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}
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return length ? obj : void 0;
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}
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// Helper for collection methods to determine whether a collection
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// should be iterated as an array or as an object.
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// Related: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength
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// Avoids a very nasty iOS 8 JIT bug on ARM-64. #2094
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||
var MAX_ARRAY_INDEX = Math.pow(2, 53) - 1;
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||
var getLength = shallowProperty('length');
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||
function isArrayLike(collection) {
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||
var length = getLength(collection);
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||
return typeof length == 'number' && length >= 0 && length <= MAX_ARRAY_INDEX;
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}
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// Collection Functions
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// --------------------
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// The cornerstone, an `each` implementation, aka `forEach`.
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// Handles raw objects in addition to array-likes. Treats all
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// sparse array-likes as if they were dense.
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function each(obj, iteratee, context) {
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iteratee = optimizeCb(iteratee, context);
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var i, length;
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if (isArrayLike(obj)) {
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for (i = 0, length = obj.length; i < length; i++) {
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iteratee(obj[i], i, obj);
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}
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} else {
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var _keys = keys(obj);
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for (i = 0, length = _keys.length; i < length; i++) {
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iteratee(obj[_keys[i]], _keys[i], obj);
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}
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}
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return obj;
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}
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// Return the results of applying the iteratee to each element.
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function map(obj, iteratee, context) {
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iteratee = cb(iteratee, context);
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var _keys = !isArrayLike(obj) && keys(obj),
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length = (_keys || obj).length,
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results = Array(length);
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for (var index = 0; index < length; index++) {
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var currentKey = _keys ? _keys[index] : index;
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results[index] = iteratee(obj[currentKey], currentKey, obj);
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}
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return results;
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}
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// Create a reducing function iterating left or right.
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function createReduce(dir) {
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||
// Wrap code that reassigns argument variables in a separate function than
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// the one that accesses `arguments.length` to avoid a perf hit. (#1991)
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||
var reducer = function(obj, iteratee, memo, initial) {
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var _keys = !isArrayLike(obj) && keys(obj),
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length = (_keys || obj).length,
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index = dir > 0 ? 0 : length - 1;
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if (!initial) {
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memo = obj[_keys ? _keys[index] : index];
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index += dir;
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}
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for (; index >= 0 && index < length; index += dir) {
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var currentKey = _keys ? _keys[index] : index;
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memo = iteratee(memo, obj[currentKey], currentKey, obj);
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}
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return memo;
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};
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return function(obj, iteratee, memo, context) {
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var initial = arguments.length >= 3;
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return reducer(obj, optimizeCb(iteratee, context, 4), memo, initial);
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};
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}
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// **Reduce** builds up a single result from a list of values, aka `inject`,
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// or `foldl`.
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var reduce = createReduce(1);
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// The right-associative version of reduce, also known as `foldr`.
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||
var reduceRight = createReduce(-1);
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||
// Return the first value which passes a truth test.
|
||
function find(obj, predicate, context) {
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||
var keyFinder = isArrayLike(obj) ? findIndex : findKey;
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||
var key = keyFinder(obj, predicate, context);
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||
if (key !== void 0 && key !== -1) return obj[key];
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||
}
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// Return all the elements that pass a truth test.
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function filter(obj, predicate, context) {
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var results = [];
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predicate = cb(predicate, context);
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each(obj, function(value, index, list) {
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if (predicate(value, index, list)) results.push(value);
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});
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return results;
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||
}
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// Return all the elements for which a truth test fails.
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||
function reject(obj, predicate, context) {
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return filter(obj, negate(cb(predicate)), context);
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||
}
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||
// Determine whether all of the elements match a truth test.
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||
function every(obj, predicate, context) {
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predicate = cb(predicate, context);
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var _keys = !isArrayLike(obj) && keys(obj),
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||
length = (_keys || obj).length;
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||
for (var index = 0; index < length; index++) {
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var currentKey = _keys ? _keys[index] : index;
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if (!predicate(obj[currentKey], currentKey, obj)) return false;
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}
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return true;
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}
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// Determine if at least one element in the object matches a truth test.
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function some(obj, predicate, context) {
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predicate = cb(predicate, context);
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||
var _keys = !isArrayLike(obj) && keys(obj),
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||
length = (_keys || obj).length;
|
||
for (var index = 0; index < length; index++) {
|
||
var currentKey = _keys ? _keys[index] : index;
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||
if (predicate(obj[currentKey], currentKey, obj)) return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
// Determine if the array or object contains a given item (using `===`).
|
||
function contains(obj, item, fromIndex, guard) {
|
||
if (!isArrayLike(obj)) obj = values(obj);
|
||
if (typeof fromIndex != 'number' || guard) fromIndex = 0;
|
||
return indexOf(obj, item, fromIndex) >= 0;
|
||
}
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||
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||
// Invoke a method (with arguments) on every item in a collection.
|
||
var invoke = restArguments(function(obj, path, args) {
|
||
var contextPath, func;
|
||
if (isFunction(path)) {
|
||
func = path;
|
||
} else if (isArray(path)) {
|
||
contextPath = path.slice(0, -1);
|
||
path = path[path.length - 1];
|
||
}
|
||
return map(obj, function(context) {
|
||
var method = func;
|
||
if (!method) {
|
||
if (contextPath && contextPath.length) {
|
||
context = deepGet(context, contextPath);
|
||
}
|
||
if (context == null) return void 0;
|
||
method = context[path];
|
||
}
|
||
return method == null ? method : method.apply(context, args);
|
||
});
|
||
});
|
||
|
||
// Convenience version of a common use case of `map`: fetching a property.
|
||
function pluck(obj, key) {
|
||
return map(obj, property(key));
|
||
}
|
||
|
||
// Convenience version of a common use case of `filter`: selecting only objects
|
||
// containing specific `key:value` pairs.
|
||
function where(obj, attrs) {
|
||
return filter(obj, matcher(attrs));
|
||
}
|
||
|
||
// Convenience version of a common use case of `find`: getting the first object
|
||
// containing specific `key:value` pairs.
|
||
function findWhere(obj, attrs) {
|
||
return find(obj, matcher(attrs));
|
||
}
|
||
|
||
// Return the maximum element (or element-based computation).
|
||
function max(obj, iteratee, context) {
|
||
var result = -Infinity, lastComputed = -Infinity,
|
||
value, computed;
|
||
if (iteratee == null || typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null) {
|
||
obj = isArrayLike(obj) ? obj : values(obj);
|
||
for (var i = 0, length = obj.length; i < length; i++) {
|
||
value = obj[i];
|
||
if (value != null && value > result) {
|
||
result = value;
|
||
}
|
||
}
|
||
} else {
|
||
iteratee = cb(iteratee, context);
|
||
each(obj, function(v, index, list) {
|
||
computed = iteratee(v, index, list);
|
||
if (computed > lastComputed || computed === -Infinity && result === -Infinity) {
|
||
result = v;
|
||
lastComputed = computed;
|
||
}
|
||
});
|
||
}
|
||
return result;
|
||
}
|
||
|
||
// Return the minimum element (or element-based computation).
|
||
function min(obj, iteratee, context) {
|
||
var result = Infinity, lastComputed = Infinity,
|
||
value, computed;
|
||
if (iteratee == null || typeof iteratee == 'number' && typeof obj[0] != 'object' && obj != null) {
|
||
obj = isArrayLike(obj) ? obj : values(obj);
|
||
for (var i = 0, length = obj.length; i < length; i++) {
|
||
value = obj[i];
|
||
if (value != null && value < result) {
|
||
result = value;
|
||
}
|
||
}
|
||
} else {
|
||
iteratee = cb(iteratee, context);
|
||
each(obj, function(v, index, list) {
|
||
computed = iteratee(v, index, list);
|
||
if (computed < lastComputed || computed === Infinity && result === Infinity) {
|
||
result = v;
|
||
lastComputed = computed;
|
||
}
|
||
});
|
||
}
|
||
return result;
|
||
}
|
||
|
||
// Shuffle a collection.
|
||
function shuffle(obj) {
|
||
return sample(obj, Infinity);
|
||
}
|
||
|
||
// Sample **n** random values from a collection using the modern version of the
|
||
// [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher–Yates_shuffle).
|
||
// If **n** is not specified, returns a single random element.
|
||
// The internal `guard` argument allows it to work with `map`.
|
||
function sample(obj, n, guard) {
|
||
if (n == null || guard) {
|
||
if (!isArrayLike(obj)) obj = values(obj);
|
||
return obj[random(obj.length - 1)];
|
||
}
|
||
var sample = isArrayLike(obj) ? clone(obj) : values(obj);
|
||
var length = getLength(sample);
|
||
n = Math.max(Math.min(n, length), 0);
|
||
var last = length - 1;
|
||
for (var index = 0; index < n; index++) {
|
||
var rand = random(index, last);
|
||
var temp = sample[index];
|
||
sample[index] = sample[rand];
|
||
sample[rand] = temp;
|
||
}
|
||
return sample.slice(0, n);
|
||
}
|
||
|
||
// Sort the object's values by a criterion produced by an iteratee.
|
||
function sortBy(obj, iteratee, context) {
|
||
var index = 0;
|
||
iteratee = cb(iteratee, context);
|
||
return pluck(map(obj, function(value, key, list) {
|
||
return {
|
||
value: value,
|
||
index: index++,
|
||
criteria: iteratee(value, key, list)
|
||
};
|
||
}).sort(function(left, right) {
|
||
var a = left.criteria;
|
||
var b = right.criteria;
|
||
if (a !== b) {
|
||
if (a > b || a === void 0) return 1;
|
||
if (a < b || b === void 0) return -1;
|
||
}
|
||
return left.index - right.index;
|
||
}), 'value');
|
||
}
|
||
|
||
// An internal function used for aggregate "group by" operations.
|
||
function group(behavior, partition) {
|
||
return function(obj, iteratee, context) {
|
||
var result = partition ? [[], []] : {};
|
||
iteratee = cb(iteratee, context);
|
||
each(obj, function(value, index) {
|
||
var key = iteratee(value, index, obj);
|
||
behavior(result, value, key);
|
||
});
|
||
return result;
|
||
};
|
||
}
|
||
|
||
// Groups the object's values by a criterion. Pass either a string attribute
|
||
// to group by, or a function that returns the criterion.
|
||
var groupBy = group(function(result, value, key) {
|
||
if (_has(result, key)) result[key].push(value); else result[key] = [value];
|
||
});
|
||
|
||
// Indexes the object's values by a criterion, similar to `groupBy`, but for
|
||
// when you know that your index values will be unique.
|
||
var indexBy = group(function(result, value, key) {
|
||
result[key] = value;
|
||
});
|
||
|
||
// Counts instances of an object that group by a certain criterion. Pass
|
||
// either a string attribute to count by, or a function that returns the
|
||
// criterion.
|
||
var countBy = group(function(result, value, key) {
|
||
if (_has(result, key)) result[key]++; else result[key] = 1;
|
||
});
|
||
|
||
var reStrSymbol = /[^\ud800-\udfff]|[\ud800-\udbff][\udc00-\udfff]|[\ud800-\udfff]/g;
|
||
// Safely create a real, live array from anything iterable.
|
||
function toArray(obj) {
|
||
if (!obj) return [];
|
||
if (isArray(obj)) return slice.call(obj);
|
||
if (isString(obj)) {
|
||
// Keep surrogate pair characters together
|
||
return obj.match(reStrSymbol);
|
||
}
|
||
if (isArrayLike(obj)) return map(obj, identity);
|
||
return values(obj);
|
||
}
|
||
|
||
// Return the number of elements in an object.
|
||
function size(obj) {
|
||
if (obj == null) return 0;
|
||
return isArrayLike(obj) ? obj.length : keys(obj).length;
|
||
}
|
||
|
||
// Split a collection into two arrays: one whose elements all satisfy the given
|
||
// predicate, and one whose elements all do not satisfy the predicate.
|
||
var partition = group(function(result, value, pass) {
|
||
result[pass ? 0 : 1].push(value);
|
||
}, true);
|
||
|
||
// Array Functions
|
||
// ---------------
|
||
|
||
// Get the first element of an array. Passing **n** will return the first N
|
||
// values in the array. The **guard** check allows it to work with `map`.
|
||
function first(array, n, guard) {
|
||
if (array == null || array.length < 1) return n == null ? void 0 : [];
|
||
if (n == null || guard) return array[0];
|
||
return initial(array, array.length - n);
|
||
}
|
||
|
||
// Returns everything but the last entry of the array. Especially useful on
|
||
// the arguments object. Passing **n** will return all the values in
|
||
// the array, excluding the last N.
|
||
function initial(array, n, guard) {
|
||
return slice.call(array, 0, Math.max(0, array.length - (n == null || guard ? 1 : n)));
|
||
}
|
||
|
||
// Get the last element of an array. Passing **n** will return the last N
|
||
// values in the array.
|
||
function last(array, n, guard) {
|
||
if (array == null || array.length < 1) return n == null ? void 0 : [];
|
||
if (n == null || guard) return array[array.length - 1];
|
||
return rest(array, Math.max(0, array.length - n));
|
||
}
|
||
|
||
// Returns everything but the first entry of the array. Especially useful on
|
||
// the arguments object. Passing an **n** will return the rest N values in the
|
||
// array.
|
||
function rest(array, n, guard) {
|
||
return slice.call(array, n == null || guard ? 1 : n);
|
||
}
|
||
|
||
// Trim out all falsy values from an array.
|
||
function compact(array) {
|
||
return filter(array, Boolean);
|
||
}
|
||
|
||
// Internal implementation of a recursive `flatten` function.
|
||
function _flatten(input, shallow, strict, output) {
|
||
output = output || [];
|
||
var idx = output.length;
|
||
for (var i = 0, length = getLength(input); i < length; i++) {
|
||
var value = input[i];
|
||
if (isArrayLike(value) && (isArray(value) || isArguments(value))) {
|
||
// Flatten current level of array or arguments object.
|
||
if (shallow) {
|
||
var j = 0, len = value.length;
|
||
while (j < len) output[idx++] = value[j++];
|
||
} else {
|
||
_flatten(value, shallow, strict, output);
|
||
idx = output.length;
|
||
}
|
||
} else if (!strict) {
|
||
output[idx++] = value;
|
||
}
|
||
}
|
||
return output;
|
||
}
|
||
|
||
// Flatten out an array, either recursively (by default), or just one level.
|
||
function flatten(array, shallow) {
|
||
return _flatten(array, shallow, false);
|
||
}
|
||
|
||
// Return a version of the array that does not contain the specified value(s).
|
||
var without = restArguments(function(array, otherArrays) {
|
||
return difference(array, otherArrays);
|
||
});
|
||
|
||
// Produce a duplicate-free version of the array. If the array has already
|
||
// been sorted, you have the option of using a faster algorithm.
|
||
// The faster algorithm will not work with an iteratee if the iteratee
|
||
// is not a one-to-one function, so providing an iteratee will disable
|
||
// the faster algorithm.
|
||
function uniq(array, isSorted, iteratee, context) {
|
||
if (!isBoolean(isSorted)) {
|
||
context = iteratee;
|
||
iteratee = isSorted;
|
||
isSorted = false;
|
||
}
|
||
if (iteratee != null) iteratee = cb(iteratee, context);
|
||
var result = [];
|
||
var seen = [];
|
||
for (var i = 0, length = getLength(array); i < length; i++) {
|
||
var value = array[i],
|
||
computed = iteratee ? iteratee(value, i, array) : value;
|
||
if (isSorted && !iteratee) {
|
||
if (!i || seen !== computed) result.push(value);
|
||
seen = computed;
|
||
} else if (iteratee) {
|
||
if (!contains(seen, computed)) {
|
||
seen.push(computed);
|
||
result.push(value);
|
||
}
|
||
} else if (!contains(result, value)) {
|
||
result.push(value);
|
||
}
|
||
}
|
||
return result;
|
||
}
|
||
|
||
// Produce an array that contains the union: each distinct element from all of
|
||
// the passed-in arrays.
|
||
var union = restArguments(function(arrays) {
|
||
return uniq(_flatten(arrays, true, true));
|
||
});
|
||
|
||
// Produce an array that contains every item shared between all the
|
||
// passed-in arrays.
|
||
function intersection(array) {
|
||
var result = [];
|
||
var argsLength = arguments.length;
|
||
for (var i = 0, length = getLength(array); i < length; i++) {
|
||
var item = array[i];
|
||
if (contains(result, item)) continue;
|
||
var j;
|
||
for (j = 1; j < argsLength; j++) {
|
||
if (!contains(arguments[j], item)) break;
|
||
}
|
||
if (j === argsLength) result.push(item);
|
||
}
|
||
return result;
|
||
}
|
||
|
||
// Take the difference between one array and a number of other arrays.
|
||
// Only the elements present in just the first array will remain.
|
||
var difference = restArguments(function(array, rest) {
|
||
rest = _flatten(rest, true, true);
|
||
return filter(array, function(value){
|
||
return !contains(rest, value);
|
||
});
|
||
});
|
||
|
||
// Complement of zip. Unzip accepts an array of arrays and groups
|
||
// each array's elements on shared indices.
|
||
function unzip(array) {
|
||
var length = array && max(array, getLength).length || 0;
|
||
var result = Array(length);
|
||
|
||
for (var index = 0; index < length; index++) {
|
||
result[index] = pluck(array, index);
|
||
}
|
||
return result;
|
||
}
|
||
|
||
// Zip together multiple lists into a single array -- elements that share
|
||
// an index go together.
|
||
var zip = restArguments(unzip);
|
||
|
||
// Converts lists into objects. Pass either a single array of `[key, value]`
|
||
// pairs, or two parallel arrays of the same length -- one of keys, and one of
|
||
// the corresponding values. Passing by pairs is the reverse of pairs.
|
||
function object(list, values) {
|
||
var result = {};
|
||
for (var i = 0, length = getLength(list); i < length; i++) {
|
||
if (values) {
|
||
result[list[i]] = values[i];
|
||
} else {
|
||
result[list[i][0]] = list[i][1];
|
||
}
|
||
}
|
||
return result;
|
||
}
|
||
|
||
// Generator function to create the findIndex and findLastIndex functions.
|
||
function createPredicateIndexFinder(dir) {
|
||
return function(array, predicate, context) {
|
||
predicate = cb(predicate, context);
|
||
var length = getLength(array);
|
||
var index = dir > 0 ? 0 : length - 1;
|
||
for (; index >= 0 && index < length; index += dir) {
|
||
if (predicate(array[index], index, array)) return index;
|
||
}
|
||
return -1;
|
||
};
|
||
}
|
||
|
||
// Returns the first index on an array-like that passes a predicate test.
|
||
var findIndex = createPredicateIndexFinder(1);
|
||
var findLastIndex = createPredicateIndexFinder(-1);
|
||
|
||
// Use a comparator function to figure out the smallest index at which
|
||
// an object should be inserted so as to maintain order. Uses binary search.
|
||
function sortedIndex(array, obj, iteratee, context) {
|
||
iteratee = cb(iteratee, context, 1);
|
||
var value = iteratee(obj);
|
||
var low = 0, high = getLength(array);
|
||
while (low < high) {
|
||
var mid = Math.floor((low + high) / 2);
|
||
if (iteratee(array[mid]) < value) low = mid + 1; else high = mid;
|
||
}
|
||
return low;
|
||
}
|
||
|
||
// Generator function to create the indexOf and lastIndexOf functions.
|
||
function createIndexFinder(dir, predicateFind, sortedIndex) {
|
||
return function(array, item, idx) {
|
||
var i = 0, length = getLength(array);
|
||
if (typeof idx == 'number') {
|
||
if (dir > 0) {
|
||
i = idx >= 0 ? idx : Math.max(idx + length, i);
|
||
} else {
|
||
length = idx >= 0 ? Math.min(idx + 1, length) : idx + length + 1;
|
||
}
|
||
} else if (sortedIndex && idx && length) {
|
||
idx = sortedIndex(array, item);
|
||
return array[idx] === item ? idx : -1;
|
||
}
|
||
if (item !== item) {
|
||
idx = predicateFind(slice.call(array, i, length), isNaN);
|
||
return idx >= 0 ? idx + i : -1;
|
||
}
|
||
for (idx = dir > 0 ? i : length - 1; idx >= 0 && idx < length; idx += dir) {
|
||
if (array[idx] === item) return idx;
|
||
}
|
||
return -1;
|
||
};
|
||
}
|
||
|
||
// Return the position of the first occurrence of an item in an array,
|
||
// or -1 if the item is not included in the array.
|
||
// If the array is large and already in sort order, pass `true`
|
||
// for **isSorted** to use binary search.
|
||
var indexOf = createIndexFinder(1, findIndex, sortedIndex);
|
||
var lastIndexOf = createIndexFinder(-1, findLastIndex);
|
||
|
||
// Generate an integer Array containing an arithmetic progression. A port of
|
||
// the native Python `range()` function. See
|
||
// [the Python documentation](https://docs.python.org/library/functions.html#range).
|
||
function range(start, stop, step) {
|
||
if (stop == null) {
|
||
stop = start || 0;
|
||
start = 0;
|
||
}
|
||
if (!step) {
|
||
step = stop < start ? -1 : 1;
|
||
}
|
||
|
||
var length = Math.max(Math.ceil((stop - start) / step), 0);
|
||
var range = Array(length);
|
||
|
||
for (var idx = 0; idx < length; idx++, start += step) {
|
||
range[idx] = start;
|
||
}
|
||
|
||
return range;
|
||
}
|
||
|
||
// Chunk a single array into multiple arrays, each containing `count` or fewer
|
||
// items.
|
||
function chunk(array, count) {
|
||
if (count == null || count < 1) return [];
|
||
var result = [];
|
||
var i = 0, length = array.length;
|
||
while (i < length) {
|
||
result.push(slice.call(array, i, i += count));
|
||
}
|
||
return result;
|
||
}
|
||
|
||
// Function (ahem) Functions
|
||
// ------------------
|
||
|
||
// Determines whether to execute a function as a constructor
|
||
// or a normal function with the provided arguments.
|
||
function executeBound(sourceFunc, boundFunc, context, callingContext, args) {
|
||
if (!(callingContext instanceof boundFunc)) return sourceFunc.apply(context, args);
|
||
var self = baseCreate(sourceFunc.prototype);
|
||
var result = sourceFunc.apply(self, args);
|
||
if (isObject(result)) return result;
|
||
return self;
|
||
}
|
||
|
||
// Create a function bound to a given object (assigning `this`, and arguments,
|
||
// optionally). Delegates to **ECMAScript 5**'s native `Function.bind` if
|
||
// available.
|
||
var bind = restArguments(function(func, context, args) {
|
||
if (!isFunction(func)) throw new TypeError('Bind must be called on a function');
|
||
var bound = restArguments(function(callArgs) {
|
||
return executeBound(func, bound, context, this, args.concat(callArgs));
|
||
});
|
||
return bound;
|
||
});
|
||
|
||
// Partially apply a function by creating a version that has had some of its
|
||
// arguments pre-filled, without changing its dynamic `this` context. _ acts
|
||
// as a placeholder by default, allowing any combination of arguments to be
|
||
// pre-filled. Set `partial.placeholder` for a custom placeholder argument.
|
||
var partial = restArguments(function(func, boundArgs) {
|
||
var placeholder = partial.placeholder;
|
||
var bound = function() {
|
||
var position = 0, length = boundArgs.length;
|
||
var args = Array(length);
|
||
for (var i = 0; i < length; i++) {
|
||
args[i] = boundArgs[i] === placeholder ? arguments[position++] : boundArgs[i];
|
||
}
|
||
while (position < arguments.length) args.push(arguments[position++]);
|
||
return executeBound(func, bound, this, this, args);
|
||
};
|
||
return bound;
|
||
});
|
||
|
||
partial.placeholder = _;
|
||
|
||
// Bind a number of an object's methods to that object. Remaining arguments
|
||
// are the method names to be bound. Useful for ensuring that all callbacks
|
||
// defined on an object belong to it.
|
||
var bindAll = restArguments(function(obj, _keys) {
|
||
_keys = _flatten(_keys, false, false);
|
||
var index = _keys.length;
|
||
if (index < 1) throw new Error('bindAll must be passed function names');
|
||
while (index--) {
|
||
var key = _keys[index];
|
||
obj[key] = bind(obj[key], obj);
|
||
}
|
||
});
|
||
|
||
// Memoize an expensive function by storing its results.
|
||
function memoize(func, hasher) {
|
||
var memoize = function(key) {
|
||
var cache = memoize.cache;
|
||
var address = '' + (hasher ? hasher.apply(this, arguments) : key);
|
||
if (!_has(cache, address)) cache[address] = func.apply(this, arguments);
|
||
return cache[address];
|
||
};
|
||
memoize.cache = {};
|
||
return memoize;
|
||
}
|
||
|
||
// Delays a function for the given number of milliseconds, and then calls
|
||
// it with the arguments supplied.
|
||
var delay = restArguments(function(func, wait, args) {
|
||
return setTimeout(function() {
|
||
return func.apply(null, args);
|
||
}, wait);
|
||
});
|
||
|
||
// Defers a function, scheduling it to run after the current call stack has
|
||
// cleared.
|
||
var defer = partial(delay, _, 1);
|
||
|
||
// Returns a function, that, when invoked, will only be triggered at most once
|
||
// during a given window of time. Normally, the throttled function will run
|
||
// as much as it can, without ever going more than once per `wait` duration;
|
||
// but if you'd like to disable the execution on the leading edge, pass
|
||
// `{leading: false}`. To disable execution on the trailing edge, ditto.
|
||
function throttle(func, wait, options) {
|
||
var timeout, context, args, result;
|
||
var previous = 0;
|
||
if (!options) options = {};
|
||
|
||
var later = function() {
|
||
previous = options.leading === false ? 0 : now();
|
||
timeout = null;
|
||
result = func.apply(context, args);
|
||
if (!timeout) context = args = null;
|
||
};
|
||
|
||
var throttled = function() {
|
||
var _now = now();
|
||
if (!previous && options.leading === false) previous = _now;
|
||
var remaining = wait - (_now - previous);
|
||
context = this;
|
||
args = arguments;
|
||
if (remaining <= 0 || remaining > wait) {
|
||
if (timeout) {
|
||
clearTimeout(timeout);
|
||
timeout = null;
|
||
}
|
||
previous = _now;
|
||
result = func.apply(context, args);
|
||
if (!timeout) context = args = null;
|
||
} else if (!timeout && options.trailing !== false) {
|
||
timeout = setTimeout(later, remaining);
|
||
}
|
||
return result;
|
||
};
|
||
|
||
throttled.cancel = function() {
|
||
clearTimeout(timeout);
|
||
previous = 0;
|
||
timeout = context = args = null;
|
||
};
|
||
|
||
return throttled;
|
||
}
|
||
|
||
// Returns a function, that, as long as it continues to be invoked, will not
|
||
// be triggered. The function will be called after it stops being called for
|
||
// N milliseconds. If `immediate` is passed, trigger the function on the
|
||
// leading edge, instead of the trailing.
|
||
function debounce(func, wait, immediate) {
|
||
var timeout, result;
|
||
|
||
var later = function(context, args) {
|
||
timeout = null;
|
||
if (args) result = func.apply(context, args);
|
||
};
|
||
|
||
var debounced = restArguments(function(args) {
|
||
if (timeout) clearTimeout(timeout);
|
||
if (immediate) {
|
||
var callNow = !timeout;
|
||
timeout = setTimeout(later, wait);
|
||
if (callNow) result = func.apply(this, args);
|
||
} else {
|
||
timeout = delay(later, wait, this, args);
|
||
}
|
||
|
||
return result;
|
||
});
|
||
|
||
debounced.cancel = function() {
|
||
clearTimeout(timeout);
|
||
timeout = null;
|
||
};
|
||
|
||
return debounced;
|
||
}
|
||
|
||
// Returns the first function passed as an argument to the second,
|
||
// allowing you to adjust arguments, run code before and after, and
|
||
// conditionally execute the original function.
|
||
function wrap(func, wrapper) {
|
||
return partial(wrapper, func);
|
||
}
|
||
|
||
// Returns a negated version of the passed-in predicate.
|
||
function negate(predicate) {
|
||
return function() {
|
||
return !predicate.apply(this, arguments);
|
||
};
|
||
}
|
||
|
||
// Returns a function that is the composition of a list of functions, each
|
||
// consuming the return value of the function that follows.
|
||
function compose() {
|
||
var args = arguments;
|
||
var start = args.length - 1;
|
||
return function() {
|
||
var i = start;
|
||
var result = args[start].apply(this, arguments);
|
||
while (i--) result = args[i].call(this, result);
|
||
return result;
|
||
};
|
||
}
|
||
|
||
// Returns a function that will only be executed on and after the Nth call.
|
||
function after(times, func) {
|
||
return function() {
|
||
if (--times < 1) {
|
||
return func.apply(this, arguments);
|
||
}
|
||
};
|
||
}
|
||
|
||
// Returns a function that will only be executed up to (but not including) the Nth call.
|
||
function before(times, func) {
|
||
var memo;
|
||
return function() {
|
||
if (--times > 0) {
|
||
memo = func.apply(this, arguments);
|
||
}
|
||
if (times <= 1) func = null;
|
||
return memo;
|
||
};
|
||
}
|
||
|
||
// Returns a function that will be executed at most one time, no matter how
|
||
// often you call it. Useful for lazy initialization.
|
||
var once = partial(before, 2);
|
||
|
||
// Object Functions
|
||
// ----------------
|
||
|
||
// Keys in IE < 9 that won't be iterated by `for key in ...` and thus missed.
|
||
var hasEnumBug = !{toString: null}.propertyIsEnumerable('toString');
|
||
var nonEnumerableProps = ['valueOf', 'isPrototypeOf', 'toString',
|
||
'propertyIsEnumerable', 'hasOwnProperty', 'toLocaleString'];
|
||
|
||
function collectNonEnumProps(obj, _keys) {
|
||
var nonEnumIdx = nonEnumerableProps.length;
|
||
var constructor = obj.constructor;
|
||
var proto = isFunction(constructor) && constructor.prototype || ObjProto;
|
||
|
||
// Constructor is a special case.
|
||
var prop = 'constructor';
|
||
if (_has(obj, prop) && !contains(_keys, prop)) _keys.push(prop);
|
||
|
||
while (nonEnumIdx--) {
|
||
prop = nonEnumerableProps[nonEnumIdx];
|
||
if (prop in obj && obj[prop] !== proto[prop] && !contains(_keys, prop)) {
|
||
_keys.push(prop);
|
||
}
|
||
}
|
||
}
|
||
|
||
// Retrieve the names of an object's own properties.
|
||
// Delegates to **ECMAScript 5**'s native `Object.keys`.
|
||
function keys(obj) {
|
||
if (!isObject(obj)) return [];
|
||
if (nativeKeys) return nativeKeys(obj);
|
||
var _keys = [];
|
||
for (var key in obj) if (_has(obj, key)) _keys.push(key);
|
||
// Ahem, IE < 9.
|
||
if (hasEnumBug) collectNonEnumProps(obj, _keys);
|
||
return _keys;
|
||
}
|
||
|
||
// Retrieve all the property names of an object.
|
||
function allKeys(obj) {
|
||
if (!isObject(obj)) return [];
|
||
var _keys = [];
|
||
for (var key in obj) _keys.push(key);
|
||
// Ahem, IE < 9.
|
||
if (hasEnumBug) collectNonEnumProps(obj, _keys);
|
||
return _keys;
|
||
}
|
||
|
||
// Retrieve the values of an object's properties.
|
||
function values(obj) {
|
||
var _keys = keys(obj);
|
||
var length = _keys.length;
|
||
var values = Array(length);
|
||
for (var i = 0; i < length; i++) {
|
||
values[i] = obj[_keys[i]];
|
||
}
|
||
return values;
|
||
}
|
||
|
||
// Returns the results of applying the iteratee to each element of the object.
|
||
// In contrast to map it returns an object.
|
||
function mapObject(obj, iteratee, context) {
|
||
iteratee = cb(iteratee, context);
|
||
var _keys = keys(obj),
|
||
length = _keys.length,
|
||
results = {};
|
||
for (var index = 0; index < length; index++) {
|
||
var currentKey = _keys[index];
|
||
results[currentKey] = iteratee(obj[currentKey], currentKey, obj);
|
||
}
|
||
return results;
|
||
}
|
||
|
||
// Convert an object into a list of `[key, value]` pairs.
|
||
// The opposite of object.
|
||
function pairs(obj) {
|
||
var _keys = keys(obj);
|
||
var length = _keys.length;
|
||
var pairs = Array(length);
|
||
for (var i = 0; i < length; i++) {
|
||
pairs[i] = [_keys[i], obj[_keys[i]]];
|
||
}
|
||
return pairs;
|
||
}
|
||
|
||
// Invert the keys and values of an object. The values must be serializable.
|
||
function invert(obj) {
|
||
var result = {};
|
||
var _keys = keys(obj);
|
||
for (var i = 0, length = _keys.length; i < length; i++) {
|
||
result[obj[_keys[i]]] = _keys[i];
|
||
}
|
||
return result;
|
||
}
|
||
|
||
// Return a sorted list of the function names available on the object.
|
||
function functions(obj) {
|
||
var names = [];
|
||
for (var key in obj) {
|
||
if (isFunction(obj[key])) names.push(key);
|
||
}
|
||
return names.sort();
|
||
}
|
||
|
||
// An internal function for creating assigner functions.
|
||
function createAssigner(keysFunc, defaults) {
|
||
return function(obj) {
|
||
var length = arguments.length;
|
||
if (defaults) obj = Object(obj);
|
||
if (length < 2 || obj == null) return obj;
|
||
for (var index = 1; index < length; index++) {
|
||
var source = arguments[index],
|
||
_keys = keysFunc(source),
|
||
l = _keys.length;
|
||
for (var i = 0; i < l; i++) {
|
||
var key = _keys[i];
|
||
if (!defaults || obj[key] === void 0) obj[key] = source[key];
|
||
}
|
||
}
|
||
return obj;
|
||
};
|
||
}
|
||
|
||
// Extend a given object with all the properties in passed-in object(s).
|
||
var extend = createAssigner(allKeys);
|
||
|
||
// Assigns a given object with all the own properties in the passed-in object(s).
|
||
// (https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Object/assign)
|
||
var extendOwn = createAssigner(keys);
|
||
|
||
// Returns the first key on an object that passes a predicate test.
|
||
function findKey(obj, predicate, context) {
|
||
predicate = cb(predicate, context);
|
||
var _keys = keys(obj), key;
|
||
for (var i = 0, length = _keys.length; i < length; i++) {
|
||
key = _keys[i];
|
||
if (predicate(obj[key], key, obj)) return key;
|
||
}
|
||
}
|
||
|
||
// Internal pick helper function to determine if `obj` has key `key`.
|
||
function keyInObj(value, key, obj) {
|
||
return key in obj;
|
||
}
|
||
|
||
// Return a copy of the object only containing the whitelisted properties.
|
||
var pick = restArguments(function(obj, _keys) {
|
||
var result = {}, iteratee = _keys[0];
|
||
if (obj == null) return result;
|
||
if (isFunction(iteratee)) {
|
||
if (_keys.length > 1) iteratee = optimizeCb(iteratee, _keys[1]);
|
||
_keys = allKeys(obj);
|
||
} else {
|
||
iteratee = keyInObj;
|
||
_keys = _flatten(_keys, false, false);
|
||
obj = Object(obj);
|
||
}
|
||
for (var i = 0, length = _keys.length; i < length; i++) {
|
||
var key = _keys[i];
|
||
var value = obj[key];
|
||
if (iteratee(value, key, obj)) result[key] = value;
|
||
}
|
||
return result;
|
||
});
|
||
|
||
// Return a copy of the object without the blacklisted properties.
|
||
var omit = restArguments(function(obj, _keys) {
|
||
var iteratee = _keys[0], context;
|
||
if (isFunction(iteratee)) {
|
||
iteratee = negate(iteratee);
|
||
if (_keys.length > 1) context = _keys[1];
|
||
} else {
|
||
_keys = map(_flatten(_keys, false, false), String);
|
||
iteratee = function(value, key) {
|
||
return !contains(_keys, key);
|
||
};
|
||
}
|
||
return pick(obj, iteratee, context);
|
||
});
|
||
|
||
// Fill in a given object with default properties.
|
||
var defaults = createAssigner(allKeys, true);
|
||
|
||
// Creates an object that inherits from the given prototype object.
|
||
// If additional properties are provided then they will be added to the
|
||
// created object.
|
||
function create(prototype, props) {
|
||
var result = baseCreate(prototype);
|
||
if (props) extendOwn(result, props);
|
||
return result;
|
||
}
|
||
|
||
// Create a (shallow-cloned) duplicate of an object.
|
||
function clone(obj) {
|
||
if (!isObject(obj)) return obj;
|
||
return isArray(obj) ? obj.slice() : extend({}, obj);
|
||
}
|
||
|
||
// Invokes interceptor with the obj, and then returns obj.
|
||
// The primary purpose of this method is to "tap into" a method chain, in
|
||
// order to perform operations on intermediate results within the chain.
|
||
function tap(obj, interceptor) {
|
||
interceptor(obj);
|
||
return obj;
|
||
}
|
||
|
||
// Returns whether an object has a given set of `key:value` pairs.
|
||
function isMatch(object, attrs) {
|
||
var _keys = keys(attrs), length = _keys.length;
|
||
if (object == null) return !length;
|
||
var obj = Object(object);
|
||
for (var i = 0; i < length; i++) {
|
||
var key = _keys[i];
|
||
if (attrs[key] !== obj[key] || !(key in obj)) return false;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
|
||
// Internal recursive comparison function for `isEqual`.
|
||
function eq(a, b, aStack, bStack) {
|
||
// Identical objects are equal. `0 === -0`, but they aren't identical.
|
||
// See the [Harmony `egal` proposal](https://wiki.ecmascript.org/doku.php?id=harmony:egal).
|
||
if (a === b) return a !== 0 || 1 / a === 1 / b;
|
||
// `null` or `undefined` only equal to itself (strict comparison).
|
||
if (a == null || b == null) return false;
|
||
// `NaN`s are equivalent, but non-reflexive.
|
||
if (a !== a) return b !== b;
|
||
// Exhaust primitive checks
|
||
var type = typeof a;
|
||
if (type !== 'function' && type !== 'object' && typeof b != 'object') return false;
|
||
return deepEq(a, b, aStack, bStack);
|
||
}
|
||
|
||
// Internal recursive comparison function for `isEqual`.
|
||
function deepEq(a, b, aStack, bStack) {
|
||
// Unwrap any wrapped objects.
|
||
if (a instanceof _) a = a._wrapped;
|
||
if (b instanceof _) b = b._wrapped;
|
||
// Compare `[[Class]]` names.
|
||
var className = toString.call(a);
|
||
if (className !== toString.call(b)) return false;
|
||
switch (className) {
|
||
// Strings, numbers, regular expressions, dates, and booleans are compared by value.
|
||
case '[object RegExp]':
|
||
// RegExps are coerced to strings for comparison (Note: '' + /a/i === '/a/i')
|
||
case '[object String]':
|
||
// Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is
|
||
// equivalent to `new String("5")`.
|
||
return '' + a === '' + b;
|
||
case '[object Number]':
|
||
// `NaN`s are equivalent, but non-reflexive.
|
||
// Object(NaN) is equivalent to NaN.
|
||
if (+a !== +a) return +b !== +b;
|
||
// An `egal` comparison is performed for other numeric values.
|
||
return +a === 0 ? 1 / +a === 1 / b : +a === +b;
|
||
case '[object Date]':
|
||
case '[object Boolean]':
|
||
// Coerce dates and booleans to numeric primitive values. Dates are compared by their
|
||
// millisecond representations. Note that invalid dates with millisecond representations
|
||
// of `NaN` are not equivalent.
|
||
return +a === +b;
|
||
case '[object Symbol]':
|
||
return SymbolProto.valueOf.call(a) === SymbolProto.valueOf.call(b);
|
||
}
|
||
|
||
var areArrays = className === '[object Array]';
|
||
if (!areArrays) {
|
||
if (typeof a != 'object' || typeof b != 'object') return false;
|
||
|
||
// Objects with different constructors are not equivalent, but `Object`s or `Array`s
|
||
// from different frames are.
|
||
var aCtor = a.constructor, bCtor = b.constructor;
|
||
if (aCtor !== bCtor && !(isFunction(aCtor) && aCtor instanceof aCtor &&
|
||
isFunction(bCtor) && bCtor instanceof bCtor)
|
||
&& ('constructor' in a && 'constructor' in b)) {
|
||
return false;
|
||
}
|
||
}
|
||
// Assume equality for cyclic structures. The algorithm for detecting cyclic
|
||
// structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`.
|
||
|
||
// Initializing stack of traversed objects.
|
||
// It's done here since we only need them for objects and arrays comparison.
|
||
aStack = aStack || [];
|
||
bStack = bStack || [];
|
||
var length = aStack.length;
|
||
while (length--) {
|
||
// Linear search. Performance is inversely proportional to the number of
|
||
// unique nested structures.
|
||
if (aStack[length] === a) return bStack[length] === b;
|
||
}
|
||
|
||
// Add the first object to the stack of traversed objects.
|
||
aStack.push(a);
|
||
bStack.push(b);
|
||
|
||
// Recursively compare objects and arrays.
|
||
if (areArrays) {
|
||
// Compare array lengths to determine if a deep comparison is necessary.
|
||
length = a.length;
|
||
if (length !== b.length) return false;
|
||
// Deep compare the contents, ignoring non-numeric properties.
|
||
while (length--) {
|
||
if (!eq(a[length], b[length], aStack, bStack)) return false;
|
||
}
|
||
} else {
|
||
// Deep compare objects.
|
||
var _keys = keys(a), key;
|
||
length = _keys.length;
|
||
// Ensure that both objects contain the same number of properties before comparing deep equality.
|
||
if (keys(b).length !== length) return false;
|
||
while (length--) {
|
||
// Deep compare each member
|
||
key = _keys[length];
|
||
if (!(_has(b, key) && eq(a[key], b[key], aStack, bStack))) return false;
|
||
}
|
||
}
|
||
// Remove the first object from the stack of traversed objects.
|
||
aStack.pop();
|
||
bStack.pop();
|
||
return true;
|
||
}
|
||
|
||
// Perform a deep comparison to check if two objects are equal.
|
||
function isEqual(a, b) {
|
||
return eq(a, b);
|
||
}
|
||
|
||
// Is a given array, string, or object empty?
|
||
// An "empty" object has no enumerable own-properties.
|
||
function isEmpty(obj) {
|
||
if (obj == null) return true;
|
||
if (isArrayLike(obj) && (isArray(obj) || isString(obj) || isArguments(obj))) return obj.length === 0;
|
||
return keys(obj).length === 0;
|
||
}
|
||
|
||
// Is a given value a DOM element?
|
||
function isElement(obj) {
|
||
return !!(obj && obj.nodeType === 1);
|
||
}
|
||
|
||
// Internal function for creating a toString-based type tester.
|
||
function tagTester(name) {
|
||
return function(obj) {
|
||
return toString.call(obj) === '[object ' + name + ']';
|
||
};
|
||
}
|
||
|
||
// Is a given value an array?
|
||
// Delegates to ECMA5's native Array.isArray
|
||
var isArray = nativeIsArray || tagTester('Array');
|
||
|
||
// Is a given variable an object?
|
||
function isObject(obj) {
|
||
var type = typeof obj;
|
||
return type === 'function' || type === 'object' && !!obj;
|
||
}
|
||
|
||
// Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp, isError, isMap, isWeakMap, isSet, isWeakSet.
|
||
var isArguments = tagTester('Arguments');
|
||
var isFunction = tagTester('Function');
|
||
var isString = tagTester('String');
|
||
var isNumber = tagTester('Number');
|
||
var isDate = tagTester('Date');
|
||
var isRegExp = tagTester('RegExp');
|
||
var isError = tagTester('Error');
|
||
var isSymbol = tagTester('Symbol');
|
||
var isMap = tagTester('Map');
|
||
var isWeakMap = tagTester('WeakMap');
|
||
var isSet = tagTester('Set');
|
||
var isWeakSet = tagTester('WeakSet');
|
||
|
||
// Define a fallback version of the method in browsers (ahem, IE < 9), where
|
||
// there isn't any inspectable "Arguments" type.
|
||
(function() {
|
||
if (!isArguments(arguments)) {
|
||
isArguments = function(obj) {
|
||
return _has(obj, 'callee');
|
||
};
|
||
}
|
||
}());
|
||
|
||
// Optimize `isFunction` if appropriate. Work around some typeof bugs in old v8,
|
||
// IE 11 (#1621), Safari 8 (#1929), and PhantomJS (#2236).
|
||
var nodelist = root.document && root.document.childNodes;
|
||
if (typeof /./ != 'function' && typeof Int8Array != 'object' && typeof nodelist != 'function') {
|
||
isFunction = function(obj) {
|
||
return typeof obj == 'function' || false;
|
||
};
|
||
}
|
||
|
||
// Is a given object a finite number?
|
||
function isFinite(obj) {
|
||
return !isSymbol(obj) && _isFinite(obj) && !_isNaN(parseFloat(obj));
|
||
}
|
||
|
||
// Is the given value `NaN`?
|
||
function isNaN(obj) {
|
||
return isNumber(obj) && _isNaN(obj);
|
||
}
|
||
|
||
// Is a given value a boolean?
|
||
function isBoolean(obj) {
|
||
return obj === true || obj === false || toString.call(obj) === '[object Boolean]';
|
||
}
|
||
|
||
// Is a given value equal to null?
|
||
function isNull(obj) {
|
||
return obj === null;
|
||
}
|
||
|
||
// Is a given variable undefined?
|
||
function isUndefined(obj) {
|
||
return obj === void 0;
|
||
}
|
||
|
||
// Shortcut function for checking if an object has a given property directly
|
||
// on itself (in other words, not on a prototype).
|
||
function has(obj, path) {
|
||
if (!isArray(path)) {
|
||
return _has(obj, path);
|
||
}
|
||
var length = path.length;
|
||
for (var i = 0; i < length; i++) {
|
||
var key = path[i];
|
||
if (obj == null || !hasOwnProperty.call(obj, key)) {
|
||
return false;
|
||
}
|
||
obj = obj[key];
|
||
}
|
||
return !!length;
|
||
}
|
||
|
||
// Utility Functions
|
||
// -----------------
|
||
|
||
// Keep the identity function around for default iteratees.
|
||
function identity(value) {
|
||
return value;
|
||
}
|
||
|
||
// Predicate-generating functions. Often useful outside of Underscore.
|
||
function constant(value) {
|
||
return function() {
|
||
return value;
|
||
};
|
||
}
|
||
|
||
function noop(){}
|
||
|
||
// Creates a function that, when passed an object, will traverse that object’s
|
||
// properties down the given `path`, specified as an array of keys or indexes.
|
||
function property(path) {
|
||
if (!isArray(path)) {
|
||
return shallowProperty(path);
|
||
}
|
||
return function(obj) {
|
||
return deepGet(obj, path);
|
||
};
|
||
}
|
||
|
||
// Generates a function for a given object that returns a given property.
|
||
function propertyOf(obj) {
|
||
if (obj == null) {
|
||
return function(){};
|
||
}
|
||
return function(path) {
|
||
return !isArray(path) ? obj[path] : deepGet(obj, path);
|
||
};
|
||
}
|
||
|
||
// Returns a predicate for checking whether an object has a given set of
|
||
// `key:value` pairs.
|
||
function matcher(attrs) {
|
||
attrs = extendOwn({}, attrs);
|
||
return function(obj) {
|
||
return isMatch(obj, attrs);
|
||
};
|
||
}
|
||
|
||
// Run a function **n** times.
|
||
function times(n, iteratee, context) {
|
||
var accum = Array(Math.max(0, n));
|
||
iteratee = optimizeCb(iteratee, context, 1);
|
||
for (var i = 0; i < n; i++) accum[i] = iteratee(i);
|
||
return accum;
|
||
}
|
||
|
||
// Return a random integer between min and max (inclusive).
|
||
function random(min, max) {
|
||
if (max == null) {
|
||
max = min;
|
||
min = 0;
|
||
}
|
||
return min + Math.floor(Math.random() * (max - min + 1));
|
||
}
|
||
|
||
// A (possibly faster) way to get the current timestamp as an integer.
|
||
var now = Date.now || function() {
|
||
return new Date().getTime();
|
||
};
|
||
|
||
// List of HTML entities for escaping.
|
||
var escapeMap = {
|
||
'&': '&',
|
||
'<': '<',
|
||
'>': '>',
|
||
'"': '"',
|
||
"'": ''',
|
||
'`': '`'
|
||
};
|
||
var unescapeMap = invert(escapeMap);
|
||
|
||
// Functions for escaping and unescaping strings to/from HTML interpolation.
|
||
function createEscaper(map) {
|
||
var escaper = function(match) {
|
||
return map[match];
|
||
};
|
||
// Regexes for identifying a key that needs to be escaped.
|
||
var source = '(?:' + keys(map).join('|') + ')';
|
||
var testRegexp = RegExp(source);
|
||
var replaceRegexp = RegExp(source, 'g');
|
||
return function(string) {
|
||
string = string == null ? '' : '' + string;
|
||
return testRegexp.test(string) ? string.replace(replaceRegexp, escaper) : string;
|
||
};
|
||
}
|
||
var escape = createEscaper(escapeMap);
|
||
var unescape = createEscaper(unescapeMap);
|
||
|
||
// Traverses the children of `obj` along `path`. If a child is a function, it
|
||
// is invoked with its parent as context. Returns the value of the final
|
||
// child, or `fallback` if any child is undefined.
|
||
function result(obj, path, fallback) {
|
||
if (!isArray(path)) path = [path];
|
||
var length = path.length;
|
||
if (!length) {
|
||
return isFunction(fallback) ? fallback.call(obj) : fallback;
|
||
}
|
||
for (var i = 0; i < length; i++) {
|
||
var prop = obj == null ? void 0 : obj[path[i]];
|
||
if (prop === void 0) {
|
||
prop = fallback;
|
||
i = length; // Ensure we don't continue iterating.
|
||
}
|
||
obj = isFunction(prop) ? prop.call(obj) : prop;
|
||
}
|
||
return obj;
|
||
}
|
||
|
||
// Generate a unique integer id (unique within the entire client session).
|
||
// Useful for temporary DOM ids.
|
||
var idCounter = 0;
|
||
function uniqueId(prefix) {
|
||
var id = ++idCounter + '';
|
||
return prefix ? prefix + id : id;
|
||
}
|
||
|
||
// By default, Underscore uses ERB-style template delimiters, change the
|
||
// following template settings to use alternative delimiters.
|
||
var templateSettings = _.templateSettings = {
|
||
evaluate: /<%([\s\S]+?)%>/g,
|
||
interpolate: /<%=([\s\S]+?)%>/g,
|
||
escape: /<%-([\s\S]+?)%>/g
|
||
};
|
||
|
||
// When customizing `templateSettings`, if you don't want to define an
|
||
// interpolation, evaluation or escaping regex, we need one that is
|
||
// guaranteed not to match.
|
||
var noMatch = /(.)^/;
|
||
|
||
// Certain characters need to be escaped so that they can be put into a
|
||
// string literal.
|
||
var escapes = {
|
||
"'": "'",
|
||
'\\': '\\',
|
||
'\r': 'r',
|
||
'\n': 'n',
|
||
'\u2028': 'u2028',
|
||
'\u2029': 'u2029'
|
||
};
|
||
|
||
var escapeRegExp = /\\|'|\r|\n|\u2028|\u2029/g;
|
||
|
||
var escapeChar = function(match) {
|
||
return '\\' + escapes[match];
|
||
};
|
||
|
||
// JavaScript micro-templating, similar to John Resig's implementation.
|
||
// Underscore templating handles arbitrary delimiters, preserves whitespace,
|
||
// and correctly escapes quotes within interpolated code.
|
||
// NB: `oldSettings` only exists for backwards compatibility.
|
||
function template(text, settings, oldSettings) {
|
||
if (!settings && oldSettings) settings = oldSettings;
|
||
settings = defaults({}, settings, _.templateSettings);
|
||
|
||
// Combine delimiters into one regular expression via alternation.
|
||
var matcher = RegExp([
|
||
(settings.escape || noMatch).source,
|
||
(settings.interpolate || noMatch).source,
|
||
(settings.evaluate || noMatch).source
|
||
].join('|') + '|$', 'g');
|
||
|
||
// Compile the template source, escaping string literals appropriately.
|
||
var index = 0;
|
||
var source = "__p+='";
|
||
text.replace(matcher, function(match, escape, interpolate, evaluate, offset) {
|
||
source += text.slice(index, offset).replace(escapeRegExp, escapeChar);
|
||
index = offset + match.length;
|
||
|
||
if (escape) {
|
||
source += "'+\n((__t=(" + escape + "))==null?'':_.escape(__t))+\n'";
|
||
} else if (interpolate) {
|
||
source += "'+\n((__t=(" + interpolate + "))==null?'':__t)+\n'";
|
||
} else if (evaluate) {
|
||
source += "';\n" + evaluate + "\n__p+='";
|
||
}
|
||
|
||
// Adobe VMs need the match returned to produce the correct offset.
|
||
return match;
|
||
});
|
||
source += "';\n";
|
||
|
||
// If a variable is not specified, place data values in local scope.
|
||
if (!settings.variable) source = 'with(obj||{}){\n' + source + '}\n';
|
||
|
||
source = "var __t,__p='',__j=Array.prototype.join," +
|
||
"print=function(){__p+=__j.call(arguments,'');};\n" +
|
||
source + 'return __p;\n';
|
||
|
||
var render;
|
||
try {
|
||
render = new Function(settings.variable || 'obj', '_', source);
|
||
} catch (e) {
|
||
e.source = source;
|
||
throw e;
|
||
}
|
||
|
||
var template = function(data) {
|
||
return render.call(this, data, _);
|
||
};
|
||
|
||
// Provide the compiled source as a convenience for precompilation.
|
||
var argument = settings.variable || 'obj';
|
||
template.source = 'function(' + argument + '){\n' + source + '}';
|
||
|
||
return template;
|
||
}
|
||
|
||
// Add a "chain" function. Start chaining a wrapped Underscore object.
|
||
function chain(obj) {
|
||
var instance = _(obj);
|
||
instance._chain = true;
|
||
return instance;
|
||
}
|
||
|
||
// OOP
|
||
// ---------------
|
||
// If Underscore is called as a function, it returns a wrapped object that
|
||
// can be used OO-style. This wrapper holds altered versions of all the
|
||
// underscore functions. Wrapped objects may be chained.
|
||
|
||
// Helper function to continue chaining intermediate results.
|
||
function chainResult(instance, obj) {
|
||
return instance._chain ? _(obj).chain() : obj;
|
||
}
|
||
|
||
// Add your own custom functions to the Underscore object.
|
||
function mixin(obj) {
|
||
each(functions(obj), function(name) {
|
||
var func = _[name] = obj[name];
|
||
_.prototype[name] = function() {
|
||
var args = [this._wrapped];
|
||
push.apply(args, arguments);
|
||
return chainResult(this, func.apply(_, args));
|
||
};
|
||
});
|
||
return _;
|
||
}
|
||
|
||
// Add all mutator Array functions to the wrapper.
|
||
each(['pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(name) {
|
||
var method = ArrayProto[name];
|
||
_.prototype[name] = function() {
|
||
var obj = this._wrapped;
|
||
method.apply(obj, arguments);
|
||
if ((name === 'shift' || name === 'splice') && obj.length === 0) delete obj[0];
|
||
return chainResult(this, obj);
|
||
};
|
||
});
|
||
|
||
// Add all accessor Array functions to the wrapper.
|
||
each(['concat', 'join', 'slice'], function(name) {
|
||
var method = ArrayProto[name];
|
||
_.prototype[name] = function() {
|
||
return chainResult(this, method.apply(this._wrapped, arguments));
|
||
};
|
||
});
|
||
|
||
// Extracts the result from a wrapped and chained object.
|
||
_.prototype.value = function() {
|
||
return this._wrapped;
|
||
};
|
||
|
||
// Provide unwrapping proxy for some methods used in engine operations
|
||
// such as arithmetic and JSON stringification.
|
||
_.prototype.valueOf = _.prototype.toJSON = _.prototype.value;
|
||
|
||
_.prototype.toString = function() {
|
||
return String(this._wrapped);
|
||
};
|
||
|
||
var allExports = ({
|
||
'default': _,
|
||
VERSION: VERSION,
|
||
iteratee: iteratee,
|
||
restArguments: restArguments,
|
||
each: each,
|
||
forEach: each,
|
||
map: map,
|
||
collect: map,
|
||
reduce: reduce,
|
||
foldl: reduce,
|
||
inject: reduce,
|
||
reduceRight: reduceRight,
|
||
foldr: reduceRight,
|
||
find: find,
|
||
detect: find,
|
||
filter: filter,
|
||
select: filter,
|
||
reject: reject,
|
||
every: every,
|
||
all: every,
|
||
some: some,
|
||
any: some,
|
||
contains: contains,
|
||
includes: contains,
|
||
include: contains,
|
||
invoke: invoke,
|
||
pluck: pluck,
|
||
where: where,
|
||
findWhere: findWhere,
|
||
max: max,
|
||
min: min,
|
||
shuffle: shuffle,
|
||
sample: sample,
|
||
sortBy: sortBy,
|
||
groupBy: groupBy,
|
||
indexBy: indexBy,
|
||
countBy: countBy,
|
||
toArray: toArray,
|
||
size: size,
|
||
partition: partition,
|
||
first: first,
|
||
head: first,
|
||
take: first,
|
||
initial: initial,
|
||
last: last,
|
||
rest: rest,
|
||
tail: rest,
|
||
drop: rest,
|
||
compact: compact,
|
||
flatten: flatten,
|
||
without: without,
|
||
uniq: uniq,
|
||
unique: uniq,
|
||
union: union,
|
||
intersection: intersection,
|
||
difference: difference,
|
||
unzip: unzip,
|
||
zip: zip,
|
||
object: object,
|
||
findIndex: findIndex,
|
||
findLastIndex: findLastIndex,
|
||
sortedIndex: sortedIndex,
|
||
indexOf: indexOf,
|
||
lastIndexOf: lastIndexOf,
|
||
range: range,
|
||
chunk: chunk,
|
||
bind: bind,
|
||
partial: partial,
|
||
bindAll: bindAll,
|
||
memoize: memoize,
|
||
delay: delay,
|
||
defer: defer,
|
||
throttle: throttle,
|
||
debounce: debounce,
|
||
wrap: wrap,
|
||
negate: negate,
|
||
compose: compose,
|
||
after: after,
|
||
before: before,
|
||
once: once,
|
||
keys: keys,
|
||
allKeys: allKeys,
|
||
values: values,
|
||
mapObject: mapObject,
|
||
pairs: pairs,
|
||
invert: invert,
|
||
functions: functions,
|
||
methods: functions,
|
||
extend: extend,
|
||
extendOwn: extendOwn,
|
||
assign: extendOwn,
|
||
findKey: findKey,
|
||
pick: pick,
|
||
omit: omit,
|
||
defaults: defaults,
|
||
create: create,
|
||
clone: clone,
|
||
tap: tap,
|
||
isMatch: isMatch,
|
||
isEqual: isEqual,
|
||
isEmpty: isEmpty,
|
||
isElement: isElement,
|
||
isArray: isArray,
|
||
isObject: isObject,
|
||
isArguments: isArguments,
|
||
isFunction: isFunction,
|
||
isString: isString,
|
||
isNumber: isNumber,
|
||
isDate: isDate,
|
||
isRegExp: isRegExp,
|
||
isError: isError,
|
||
isSymbol: isSymbol,
|
||
isMap: isMap,
|
||
isWeakMap: isWeakMap,
|
||
isSet: isSet,
|
||
isWeakSet: isWeakSet,
|
||
isFinite: isFinite,
|
||
isNaN: isNaN,
|
||
isBoolean: isBoolean,
|
||
isNull: isNull,
|
||
isUndefined: isUndefined,
|
||
has: has,
|
||
identity: identity,
|
||
constant: constant,
|
||
noop: noop,
|
||
property: property,
|
||
propertyOf: propertyOf,
|
||
matcher: matcher,
|
||
matches: matcher,
|
||
times: times,
|
||
random: random,
|
||
now: now,
|
||
escape: escape,
|
||
unescape: unescape,
|
||
result: result,
|
||
uniqueId: uniqueId,
|
||
templateSettings: templateSettings,
|
||
template: template,
|
||
chain: chain,
|
||
mixin: mixin
|
||
});
|
||
|
||
// Add all of the Underscore functions to the wrapper object.
|
||
var _$1 = mixin(allExports);
|
||
// Legacy Node.js API
|
||
_$1._ = _$1;
|
||
|
||
return _$1;
|
||
|
||
})));
|
||
//# sourceMappingURL=underscore.js.map
|