From mboxrd@z Thu Jan 1 00:00:00 1970 Path: main.gmane.org!not-for-mail From: Klaus Berndl Newsgroups: gmane.emacs.help Subject: Re: replacing a certain element in a list with another Date: 30 Sep 2003 16:28:16 +0200 Organization: "sd&m AG, Muenchen, Germany" Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Message-ID: References: NNTP-Posting-Host: deer.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: sea.gmane.org 1064932736 24012 80.91.224.253 (30 Sep 2003 14:38:56 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Tue, 30 Sep 2003 14:38:56 +0000 (UTC) Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Tue Sep 30 16:38:53 2003 Return-path: Original-Received: from monty-python.gnu.org ([199.232.76.173]) by deer.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 1A4LeP-0008BV-00 for ; Tue, 30 Sep 2003 16:38:53 +0200 Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.22) id 1A4LYM-0001W3-6z for geh-help-gnu-emacs@m.gmane.org; Tue, 30 Sep 2003 10:32:38 -0400 Original-Path: shelby.stanford.edu!newsfeed.stanford.edu!headwall.stanford.edu!newshub.sdsu.edu!logbridge.uoregon.edu!news2.telebyte.nl!npeer.de.kpn-eurorings.net!newsfeed.kabelfoon.nl!195.129.110.21.MISMATCH!bnewsfeed00.bru.ops.eu.uu.net!bnewsinpeer01.bru.ops.eu.uu.net!lnewsinpeer01.lnd.ops.eu.uu.net!emea.uu.net!news.sdm.de!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 29 Original-NNTP-Posting-Host: sachrang.muc.sdm.de Original-X-Trace: news.sdm.de 1064932091 10059 193.102.181.186 (30 Sep 2003 14:28:11 GMT) Original-X-Complaints-To: usenet@news.sdm.de Original-NNTP-Posting-Date: Tue, 30 Sep 2003 14:28:11 +0000 (UTC) User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 Original-Xref: shelby.stanford.edu gnu.emacs.help:116965 Original-To: help-gnu-emacs@gnu.org X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.2 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: main.gmane.org gmane.emacs.help:12890 X-Report-Spam: http://spam.gmane.org/gmane.emacs.help:12890 On Tue, 30 Sep 2003, Stefan Monnier wrote: > > Suppose i have the following list: '(a b c d) What is a good way to > > replace one of the list-elements with another, so foe example replacing > > the 'c with 'e? > > (mapcar (lambda (x) (if (eq x 'c) 'e x)) ) > > I'd advise against using `setcar/setcdr' unless you have good reasons to > do it. Why? I believe, but just for my interest and to become a better elisp-programmer?! Thanks, Klaus > > > Stefan -- Klaus Berndl mailto: klaus.berndl@sdm.de sd&m AG http://www.sdm.de software design & management Thomas-Dehler-Str. 27, 81737 München, Germany Tel +49 89 63812-392, Fax -220