| 'use strict'; | |
| module.exports = function () { | |
| var arr = [1, 'foo'], iterator, result; | |
| if (typeof arr.keys !== 'function') return false; | |
| iterator = arr.keys(); | |
| if (!iterator) return false; | |
| if (typeof iterator.next !== 'function') return false; | |
| result = iterator.next(); | |
| if (!result) return false; | |
| if (result.value !== 0) return false; | |
| if (result.done !== false) return false; | |
| return true; | |
| }; |