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Diffstat (limited to 'deps/npm/node_modules/lodash._createcache/index.js')
-rw-r--r-- | deps/npm/node_modules/lodash._createcache/index.js | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/deps/npm/node_modules/lodash._createcache/index.js b/deps/npm/node_modules/lodash._createcache/index.js new file mode 100644 index 0000000000..6cf391c149 --- /dev/null +++ b/deps/npm/node_modules/lodash._createcache/index.js @@ -0,0 +1,91 @@ +/** + * 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; |