1  var nativeCreate = require('./_nativeCreate');
 2  
 3  /** Used for built-in method references. */
 4  var objectProto = Object.prototype;
 5  
 6  /** Used to check objects for own properties. */
 7  var hasOwnProperty = objectProto.hasOwnProperty;
 8  
 9  /**
10   * Checks if a hash value for `key` exists.
11   *
12   * @private
13   * @name has
14   * @memberOf Hash
15   * @param {string} key The key of the entry to check.
16   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
17   */
18  function hashHas(key) {
19    var data = this.__data__;
20    return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
21  }
22  
23  module.exports = hashHas;