From: Barry Margolin <barmar@alum.mit.edu>
To: help-gnu-emacs@gnu.org
Subject: Re: Wanted: Adding list-elements into an existing list
Date: Thu, 16 Oct 2008 20:28:18 -0400 [thread overview]
Message-ID: <barmar-B318CF.20281816102008@mara100-84.onlink.net> (raw)
In-Reply-To: f3c2bc36-6120-4567-9297-3e91bf32e350@u46g2000hsc.googlegroups.com
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In article
<f3c2bc36-6120-4567-9297-3e91bf32e350@u46g2000hsc.googlegroups.com>,
Nordlöw <per.nordlow@gmail.com> wrote:
> (append) does not modify its first argument which is what I want.
>
> I can solve it through
> (setq x (append x y))
>
> but before I create this new function for this I just wanted to make
> sure that no such function already exists....
nconc is like append, but modifies the first argument.
But you still have to use (setq x (nconc x y)), in case x is initially
the empty list, because you can't modify the empty list in place.
--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
*** PLEASE don't copy me on replies, I'll read them in the group ***
next prev parent reply other threads:[~2008-10-17 0:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-16 13:13 Wanted: Adding list-elements into an existing list Nordlöw
2008-10-16 13:16 ` Joost Diepenmaat
2008-10-16 13:36 ` Nordlöw
2008-10-16 15:43 ` Drew Adams
2008-10-16 16:02 ` Allan Gottlieb
2008-10-16 16:12 ` Drew Adams
2008-10-17 0:28 ` Barry Margolin [this message]
2008-10-16 22:32 ` Pascal J. Bourguignon
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