> For the complete documentation index, see [llms.txt](https://dev-lambda.gitbook.io/tech-interview-cs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev-lambda.gitbook.io/tech-interview-cs/design-patern/iteratorpattern.md).

# 이터레이터 패턴

## 이터레이터 패턴이란

* 이터레이터를 사용하여 컬랙션의 요소들에 접근하는 디자인 패턴
* 순회할 수 있는 여러가지 자료형의 구조와는 상관없이 이터레이터라는 하나의 인터페이스로 순회 가능

{% embed url="<https://github.com/wnghdcjfe/csnote/blob/main/ch1/11.js>" %}

* 다른 자료 구조인 set과 map에 똑같은 for a of b라는 이터레이터 프로토콜을 통해 순회
  * 이터레이터 프로토콜: 이터러블한 객체들을 순회할 때 쓰이는 규칙
  * 이터러블한 객체: 반복가능한 객체로 배열을 일반화한 객체


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://dev-lambda.gitbook.io/tech-interview-cs/design-patern/iteratorpattern.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.