> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/sidef-lang/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/sidef-lang/programming_tasks/n/narcissist.md).

# Narcissist

```ruby
say (File(__FILE__).open_r.slurp == ARGF.slurp)
```