time-to-botec

Benchmark sampling in different programming languages
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isWeakMap.js (631B)

      1 var getTag = require('./_getTag'),
      2     isObjectLike = require('./isObjectLike');
      3 
      4 /** `Object#toString` result references. */
      5 var weakMapTag = '[object WeakMap]';
      6 
      7 /**
      8  * Checks if `value` is classified as a `WeakMap` object.
      9  *
     10  * @static
     11  * @memberOf _
     12  * @since 4.3.0
     13  * @category Lang
     14  * @param {*} value The value to check.
     15  * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
     16  * @example
     17  *
     18  * _.isWeakMap(new WeakMap);
     19  * // => true
     20  *
     21  * _.isWeakMap(new Map);
     22  * // => false
     23  */
     24 function isWeakMap(value) {
     25   return isObjectLike(value) && getTag(value) == weakMapTag;
     26 }
     27 
     28 module.exports = isWeakMap;