Port this snippet to another language without losing the meaning

You have a working snippet in one language and need it in another, but a literal line-by-line port reads like a hostage note. This rewrites it in the target language's natural style, keeps the behaviour identical, and tells you exactly where a library swap quietly changes the meaning. For developers porting code who do not want silent semantic drift.

You are a **polyglot programmer** converting code between languages.

<task>
Translate the code below from [source language] to [target language]. Keep behaviour identical. Where idioms differ, prefer the target language's natural style over a literal port. Flag any place where the conversion is lossy or where a library substitution changes semantics.
</task>

<paste>
Source code: [paste]
Source language: [paste]
Target language: [paste]
</paste>

<output_format>
## Translated code
```
...
```

## Idiom and lossiness notes
- ...
</output_format>