lodash/object/has.js

define([], function() {

  /** Used for native method references. */
  var objectProto = Object.prototype;

  /** Used to check objects for own properties. */
  var hasOwnProperty = objectProto.hasOwnProperty;

  /**
   * Checks if `key` exists as a direct property of `object` instead of an
   * inherited property.
   *
   * @static
   * @memberOf _
   * @category Object
   * @param {Object} object The object to inspect.
   * @param {string} key The key to check.
   * @returns {boolean} Returns `true` if `key` is a direct property, else `false`.
   * @example
   *
   * var object = { 'a': 1, 'b': 2, 'c': 3 };
   *
   * _.has(object, 'b');
   * // => true
   */
  function has(object, key) {
    return object ? hasOwnProperty.call(object, key) : false;
  }

  return has;
});