1  var Hash = require('./_Hash'),
 2      ListCache = require('./_ListCache'),
 3      Map = require('./_Map');
 4  
 5  /**
 6   * Removes all key-value entries from the map.
 7   *
 8   * @private
 9   * @name clear
10   * @memberOf MapCache
11   */
12  function mapCacheClear() {
13    this.size = 0;
14    this.__data__ = {
15      'hash': new Hash,
16      'map': new (Map || ListCache),
17      'string': new Hash
18    };
19  }
20  
21  module.exports = mapCacheClear;