AlkantarClanX12
Current Path : /usr/lib/node_modules/npm/node_modules/lodash._createcache/ |
Current File : //usr/lib/node_modules/npm/node_modules/lodash._createcache/index.js |
/** * lodash 3.1.2 (Custom Build) <https://lodash.com/> * Build: `lodash modern modularize exports="npm" -o ./` * Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/> * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE> * Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors * Available under MIT license <https://lodash.com/license> */ var getNative = require('lodash._getnative'); /** Native method references. */ var Set = getNative(global, 'Set'); /* Native method references for those with the same name as other `lodash` methods. */ var nativeCreate = getNative(Object, 'create'); /** * * Creates a cache object to store unique values. * * @private * @param {Array} [values] The values to cache. */ function SetCache(values) { var length = values ? values.length : 0; this.data = { 'hash': nativeCreate(null), 'set': new Set }; while (length--) { this.push(values[length]); } } /** * Adds `value` to the cache. * * @private * @name push * @memberOf SetCache * @param {*} value The value to cache. */ function cachePush(value) { var data = this.data; if (typeof value == 'string' || isObject(value)) { data.set.add(value); } else { data.hash[value] = true; } } /** * Creates a `Set` cache object to optimize linear searches of large arrays. * * @private * @param {Array} [values] The values to cache. * @returns {null|Object} Returns the new cache object if `Set` is supported, else `null`. */ function createCache(values) { return (nativeCreate && Set) ? new SetCache(values) : null; } /** * Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`. * (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`) * * @static * @memberOf _ * @category Lang * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is an object, else `false`. * @example * * _.isObject({}); * // => true * * _.isObject([1, 2, 3]); * // => true * * _.isObject(1); * // => false */ function isObject(value) { // Avoid a V8 JIT bug in Chrome 19-20. // See https://code.google.com/p/v8/issues/detail?id=2291 for more details. var type = typeof value; return !!value && (type == 'object' || type == 'function'); } // Add functions to the `Set` cache. SetCache.prototype.push = cachePush; module.exports = createCache;