From: Pierre Lorenzon <devel@pollock-nageoire.net>
To: aeuster@gmail.com
Cc: Help-gnu-emacs@gnu.org
Subject: Re: setcdr question
Date: Tue, 02 Jul 2013 04:12:14 +0200 (CEST) [thread overview]
Message-ID: <20130702.041214.71107046.devel@pollock-nageoire.net> (raw)
In-Reply-To: <1372718770419-290941.post@n5.nabble.com>
From: drain <aeuster@gmail.com>
Subject: setcdr question
Date: Mon, 1 Jul 2013 15:46:10 -0700 (PDT)
> (setq list '(Trevor Jason John Alex Max))
>
> (setcdr (nthcdr (1- 4) list) 'Christina)
>
> list
>
> "list" is now set to:
>
> (Trevor Jason John Alex . Christina)
>
> Why is the dot there?
Because you should have issued :
(setcdr (nthcdr (1- 4) list) '(Christina))
See how lists are made from cons cell. The cdr should always
be a list itself or nil at the end.
Regards
Pierre
>
>
>
> --
> View this message in context: http://emacs.1067599.n5.nabble.com/setcdr-question-tp290941.html
> Sent from the Emacs - Help mailing list archive at Nabble.com.
>
next prev parent reply other threads:[~2013-07-02 2:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-01 22:46 setcdr question drain
2013-07-02 2:12 ` Pierre Lorenzon [this message]
2013-07-02 9:06 ` Nicolas Richard
2013-07-02 9:17 ` Teemu Likonen
2013-07-02 22:17 ` drain
2013-07-02 22:26 ` drain
2013-07-03 9:13 ` Pierre Lorenzon
[not found] ` <mailman.90.1372804018.12400.help-gnu-emacs@gnu.org>
2013-07-03 13:04 ` Rustom Mody
2013-07-04 19:19 ` drain
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