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Viewing file:     isWeakMap.js (631 B)      -rw-r--r--

var getTag = require('./_getTag'),
    isObjectLike = require('./isObjectLike');

/** `Object#toString` result references. */
var weakMapTag = '[object WeakMap]';

/**
 * Checks if `value` is classified as a `WeakMap` object.
 *
 * @static
 * @memberOf _
 * @since 4.3.0
 * @category Lang
 * @param {*} value The value to check.
 * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
 * @example
 *
 * _.isWeakMap(new WeakMap);
 * // => true
 *
 * _.isWeakMap(new Map);
 * // => false
 */
function isWeakMap(value) {
  return isObjectLike(value) && getTag(value) == weakMapTag;
}

module.exports = isWeakMap;