From: David Kastrup <dak@gnu.org>
To: emacs-devel@gnu.org
Subject: Re: (n)reverse vs. length
Date: Wed, 14 May 2014 22:12:16 +0200 [thread overview]
Message-ID: <87r43wrufz.fsf@fencepost.gnu.org> (raw)
In-Reply-To: jwvha4stc2u.fsf-monnier+emacs@gnu.org
Stefan Monnier <monnier@IRO.UMontreal.CA> writes:
>> Should (n)reverse has the same semantics as length, i.e. accept
>> vectors and strings as well?
>
> Good question.
>
>> IMHO this is the convenient and expected behavior from the point of
>> view of the elisp programmer.
>
> Elisp is pretty lame and messy in this respect.
> E.g. we have elt/aref/nth which operate on various subsets of sequences.
> We have mapc/mapcar which apply to lists and arrays (and strings), but
> mapcar returns a list in any case.
>
> I think it would be OK to make `reverse' work on arrays and strings.
> I definitely don't want `nreverse' working on strings (strings should
> be immutable),
Doesn't aset work on strings?
--
David Kastrup
next prev parent reply other threads:[~2014-05-14 20:12 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-14 14:19 (n)reverse vs. length Dmitry Antipov
2014-05-14 19:10 ` Stefan Monnier
2014-05-14 20:12 ` David Kastrup [this message]
2014-05-15 1:45 ` Stefan Monnier
2014-05-15 4:29 ` Dmitry Antipov
2014-05-15 5:49 ` David Kastrup
2014-05-15 12:38 ` Stefan Monnier
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