_cloneMap.js

define(['./_addMapEntry', './_arrayReduce', './_mapToArray'], function(addMapEntry, arrayReduce, mapToArray) {

  /**
   * Creates a clone of `map`.
   *
   * @private
   * @param {Object} map The map to clone.
   * @param {Function} cloneFunc The function to clone values.
   * @param {boolean} [isDeep] Specify a deep clone.
   * @returns {Object} Returns the cloned map.
   */
  function cloneMap(map, isDeep, cloneFunc) {
    var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
    return arrayReduce(array, addMapEntry, new map.constructor);
  }

  return cloneMap;
});