From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 12314@debbugs.gnu.org, cyd@gnu.org
Subject: bug#12314: 24.2.50; `add-to-history': use `setq' with `delete'
Date: Sat, 08 Sep 2012 19:11:50 -0400 [thread overview]
Message-ID: <jwv627okt5l.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <837gs4mcqy.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 09 Sep 2012 00:21:57 +0300")
>> > Why is it even necessary to talk about destructive modifications, if
>> > we are to advise to assign the result anyway?
>> Not sure I understand the question. It is because these operations can be
>> destructive of list structure that we advise that.
> If you need to forget about the old value and assign the new one
> returned by 'delete', why does it matter that the modification was
> destructive?
Because it avoids memory allocation. I.e. 99% of the uses of
delete/delq/nconc are simple optimizations.
Stefan
next prev parent reply other threads:[~2012-09-08 23:11 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-30 23:08 bug#12314: 24.2.50; `add-to-history': use `setq' with `delete' Drew Adams
2012-09-08 14:32 ` Chong Yidong
2012-09-08 14:43 ` Eli Zaretskii
2012-09-08 14:57 ` Drew Adams
2012-09-08 15:20 ` Eli Zaretskii
2012-09-08 15:48 ` Drew Adams
2012-09-08 16:05 ` Eli Zaretskii
2012-09-08 16:19 ` Andreas Schwab
2012-09-08 16:33 ` Eli Zaretskii
2012-09-08 16:50 ` Lars Ingebrigtsen
2012-09-08 16:54 ` Drew Adams
2012-09-08 17:06 ` Andreas Schwab
2012-09-08 16:35 ` Drew Adams
2012-09-08 16:25 ` Drew Adams
2012-09-08 16:32 ` Eli Zaretskii
2012-09-08 16:42 ` Drew Adams
2012-09-08 21:21 ` Eli Zaretskii
2012-09-08 22:26 ` Drew Adams
2012-09-09 3:00 ` Eli Zaretskii
2012-09-09 6:29 ` Drew Adams
2012-09-09 7:53 ` Chong Yidong
2012-09-09 17:25 ` Eli Zaretskii
2012-09-10 11:54 ` Wolfgang Jenkner
2012-09-08 23:11 ` Stefan Monnier [this message]
2012-09-09 2:51 ` Eli Zaretskii
2012-09-09 14:44 ` Stefan Monnier
2012-09-09 17:14 ` Eli Zaretskii
2012-09-09 17:35 ` Drew Adams
2012-09-09 18:20 ` Eli Zaretskii
2012-09-09 19:46 ` Drew Adams
2012-09-09 21:37 ` Stefan Monnier
2012-09-10 4:37 ` Eli Zaretskii
2012-09-10 12:59 ` Stefan Monnier
2012-09-10 15:01 ` Stefan Monnier
2012-09-10 15:21 ` Drew Adams
2012-09-10 16:24 ` Eli Zaretskii
2012-09-09 8:25 ` Dmitry Gutov
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