From: Thorsten Jolitz <tjolitz@gmail.com>
To: help-gnu-emacs@gnu.org
Subject: Re: Why doesn't nconc change my variable?
Date: Sun, 05 Oct 2014 12:52:03 +0200 [thread overview]
Message-ID: <87zjda23ho.fsf@gmail.com> (raw)
In-Reply-To: 87vbnylu3z.fsf@wmi.amu.edu.pl
Marcin Borkowski <mbork@wmi.amu.edu.pl> writes:
>>> (setq my-list (nconc my-list '("wtf")))
> That I didn't read earlier; I've read it now, and still don't get it.
even w/o understanding the details, one can simply try to internalize
the rule that after destructive list operations a setq is necessary to
make changes take effect, i.e. always use this (pseudo-code) pattern:
,----
| (setq X (destuctively-modify X))
`----
--
cheers,
Thorsten
next prev parent reply other threads:[~2014-10-05 10:52 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-05 1:36 Why doesn't nconc change my variable? Marcin Borkowski
2014-10-05 1:58 ` Drew Adams
2014-10-05 9:54 ` Marcin Borkowski
2014-10-05 10:52 ` Thorsten Jolitz [this message]
2014-10-05 16:29 ` Drew Adams
2014-10-05 16:38 ` Drew Adams
[not found] ` <mailman.10475.1412502895.1147.help-gnu-emacs@gnu.org>
2014-10-05 18:12 ` Pascal J. Bourguignon
2014-10-05 18:14 ` Pascal J. Bourguignon
2014-10-05 18:31 ` Pascal J. Bourguignon
[not found] <mailman.10460.1412473030.1147.help-gnu-emacs@gnu.org>
2014-10-05 1:59 ` Pascal J. Bourguignon
2014-10-05 9:35 ` Marcin Borkowski
[not found] ` <mailman.10474.1412501757.1147.help-gnu-emacs@gnu.org>
2014-10-05 17:50 ` Pascal J. Bourguignon
2014-10-05 18:04 ` Pascal J. Bourguignon
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