Re: Negative nth index

[Teemu Likonen]

* 2024-12-24 00:11:26-0500, Stefan Monnier wrote:

> I don't see a strong argument in favor of making it index from the end
> rather than signal an error.  What would the implementation look like?
> Would it be significantly more efficient than doing it "by hand" e.g.:
>
>     (let ((l (length X)))
>       (nth (if (< i 0) (- l i) i) X))

First test if index (i) is negative and only then run the needed
"length" etc.

-- 
/// Teemu Likonen - .-.. https://www.iki.fi/tlikonen/
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