1  var baseFor = require('./_baseFor'),
 2      castFunction = require('./_castFunction'),
 3      keysIn = require('./keysIn');
 4  
 5  /**
 6   * Iterates over own and inherited enumerable string keyed properties of an
 7   * object and invokes `iteratee` for each property. The iteratee is invoked
 8   * with three arguments: (value, key, object). Iteratee functions may exit
 9   * iteration early by explicitly returning `false`.
10   *
11   * @static
12   * @memberOf _
13   * @since 0.3.0
14   * @category Object
15   * @param {Object} object The object to iterate over.
16   * @param {Function} [iteratee=_.identity] The function invoked per iteration.
17   * @returns {Object} Returns `object`.
18   * @see _.forInRight
19   * @example
20   *
21   * function Foo() {
22   *   this.a = 1;
23   *   this.b = 2;
24   * }
25   *
26   * Foo.prototype.c = 3;
27   *
28   * _.forIn(new Foo, function(value, key) {
29   *   console.log(key);
30   * });
31   * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
32   */
33  function forIn(object, iteratee) {
34    return object == null
35      ? object
36      : baseFor(object, castFunction(iteratee), keysIn);
37  }
38  
39  module.exports = forIn;