JS Iterable Object
[JS Iterable Protocol](https://texonom.com/js-iterable-protocol-e246a992a2c24d77a9d3a17c2272b051) 


iterable 하기 위해서 object는 @@iterator 메소드를 구현해야 합니다




### Iterable Objects
> [iterable 객체](https://ko.javascript.info/iterable)

> [Iteration protocols](https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Iteration_protocols)





