# Page Not Found

The URL `programming-tasks/f/file_modification_time` does not exist. This page may have been moved, renamed, or deleted.

## Suggested Pages

You may be looking for one of the following:
- [File modification time](https://trizen.gitbook.io/perl6-rosettacode/programming_tasks/f/file_modification_time.md)
- [Find duplicate files](https://trizen.gitbook.io/perl6-rosettacode/programming_tasks/f/find_duplicate_files.md)
- [File size distribution](https://trizen.gitbook.io/perl6-rosettacode/programming_tasks/f/file_size_distribution.md)
- [File size](https://trizen.gitbook.io/perl6-rosettacode/programming_tasks/f/file_size.md)
- [Find URI in text](https://trizen.gitbook.io/perl6-rosettacode/programming_tasks/f/find_uri_in_text.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://trizen.gitbook.io/perl6-rosettacode/programming_tasks/f/file_modification_time.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://trizen.gitbook.io/perl6-rosettacode/sitemap.md

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

### Option 3 — Retrieve the full documentation corpus

Full export: https://trizen.gitbook.io/perl6-rosettacode/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., `/perl6-rosettacode/programming_tasks/f/file_modification_time.md`).

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