1  var nativeCreate = require('./_nativeCreate');
 2  
 3  /** Used to stand-in for `undefined` hash values. */
 4  var HASH_UNDEFINED = '__lodash_hash_undefined__';
 5  
 6  /**
 7   * Sets the hash `key` to `value`.
 8   *
 9   * @private
10   * @name set
11   * @memberOf Hash
12   * @param {string} key The key of the value to set.
13   * @param {*} value The value to set.
14   * @returns {Object} Returns the hash instance.
15   */
16  function hashSet(key, value) {
17    var data = this.__data__;
18    this.size += this.has(key) ? 0 : 1;
19    data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
20    return this;
21  }
22  
23  module.exports = hashSet;