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From: Stefan Kangas <stefankangas@gmail.com>
To: Tassilo Horn <tsdh@gnu.org>, Eli Zaretskii <eliz@gnu.org>
Cc: Anand Tamariya <atamariya@gmail.com>,
	emacs-devel@gnu.org,  Stefan Monnier <monnier@iro.umontreal.ca>
Subject: Re: Negative nth index
Date: Mon, 23 Dec 2024 05:40:36 +0000	[thread overview]
Message-ID: <CADwFkmmsW0PXQek1mFERyF923QBLaA8ho1dJDp8_8bmmNYig9A@mail.gmail.com> (raw)
In-Reply-To: <87jzbs9jlk.fsf@gnu.org>

Tassilo Horn <tsdh@gnu.org> writes:

> Eli Zaretskii <eliz@gnu.org> writes:
>
>>> Should negative index for nth be valid? e.g.
>>> (nth -1 '(1 2)) returns 1
>>
>> What does this do in other Lisps?
>
> In CL, it errors (ditto for nthcdr with negative index).  Same for (nth
> '(1 2 3) -1) in Clojure or (list-ref '(1 2 3) -1) in Scheme.

Stefan Monnier, any comments here?



  reply	other threads:[~2024-12-23  5:40 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-12-22  5:43 Negative nth index Anand Tamariya
2024-12-22  7:39 ` Eli Zaretskii
2024-12-22  9:01   ` Tassilo Horn
2024-12-23  5:40     ` Stefan Kangas [this message]
2024-12-24  5:11       ` Stefan Monnier
2024-12-24  6:42         ` Teemu Likonen
2024-12-24  6:48         ` Thierry Volpiatto
2024-12-24 13:09           ` Philip Kaludercic
2024-12-24 15:18         ` Stefan Monnier
2024-12-24 15:24         ` Sebastián Monía
2024-12-24 21:33         ` Pip Cet via Emacs development discussions.
2024-12-25 10:30           ` Mattias Engdegård
2024-12-25 10:56             ` Pip Cet via Emacs development discussions.
2024-12-25 12:14               ` Mattias Engdegård
2024-12-25 13:04                 ` Pip Cet via Emacs development discussions.
2024-12-22 10:16 ` Andreas Schwab

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