-- <snip> --

> I look into this. And also in updating its comment and usage hint.

Attached is what i could come up with. It does not use zsh magic.
Could be zsh'ified though. ;) Personally i happy with the result.
Also attached is a shell script that creates a test env for sll().

I testet it as good as i could think of. Tell me what you think.

> 
> Thanks!
> 
> kind regards,
> 
>      Thilo
>