# Page Not Found

The URL `dev_note/funtional-programming/undefined-2` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [타입 코드 처리하기](https://taewoongs-organization.gitbook.io/jtwjs-dev-wiki/dev_note/refactoring/undefined-2.md)
- [단위 테스트 스타일](https://taewoongs-organization.gitbook.io/jtwjs-dev-wiki/dev_note/testing/undefined-2.md)
- [중복 문제 해결하기](https://taewoongs-organization.gitbook.io/jtwjs-dev-wiki/dev_note/system-design/undefined-2.md)
- [커뮤니케이션](https://taewoongs-organization.gitbook.io/jtwjs-dev-wiki/dev_note/fe-develop/undefined-2.md)
- [부수효과](https://taewoongs-organization.gitbook.io/jtwjs-dev-wiki/dev_note/fp/undefined-2.md)

## How to find the correct page

If the exact page cannot be found, you can still retrieve the information using the documentation query interface.

### Option 1 — Ask a question (recommended)

Perform an HTTP GET request on the documentation index with the `ask` parameter:

```
GET https://taewoongs-organization.gitbook.io/jtwjs-dev-wiki/dev_note/refactoring/undefined-2.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

### Option 2 — Browse the documentation index

Full index: https://taewoongs-organization.gitbook.io/jtwjs-dev-wiki/sitemap.md

Use this to discover valid page paths or navigate the documentation structure.

### Option 3 — Retrieve the full documentation corpus

Full export: https://taewoongs-organization.gitbook.io/jtwjs-dev-wiki/llms-full.txt

Use this to access all content at once and perform your own parsing or retrieval. It will be more expensive.

## Tips for requesting documentation

Prefer `.md` URLs for structured content, append `.md` to URLs (e.g., `/jtwjs-dev-wiki/dev_note/refactoring/undefined-2.md`).

You may also use `Accept: text/markdown` header for content negotiation.