From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Joost Kremers Newsgroups: gmane.emacs.help Subject: Re: Basic questions about elisp Date: 10 Nov 2009 12:11:40 GMT Message-ID: References: <1e9f8449-09ec-4a84-a332-9f05fadb8aa3@z41g2000yqz.googlegroups.com> <87iqdpdog1.fsf@galatea.local> <871vkdm2p1.fsf@lola.goethe.zz> <4d5245de-4a71-4be7-a445-6d033be48490@g23g2000yqh.googlegroups.com> <87zl6ziooo.fsf@lola.goethe.zz> <878wejcpys.fsf@galatea.local> <871vk99c08.fsf@galatea.local> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1257856893 8262 80.91.229.12 (10 Nov 2009 12:41:33 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 10 Nov 2009 12:41:33 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Tue Nov 10 13:41:26 2009 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1N7q27-0001jQ-8E for geh-help-gnu-emacs@m.gmane.org; Tue, 10 Nov 2009 13:41:15 +0100 Original-Received: from localhost ([127.0.0.1]:38954 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1N7q26-0006xb-PY for geh-help-gnu-emacs@m.gmane.org; Tue, 10 Nov 2009 07:41:14 -0500 Original-Path: news.stanford.edu!usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 20 Original-X-Trace: individual.net ZipVLqkgQgyCu/58PGMCjAl+5hkirdK2aS1pu9q2J3lE/Wk/iS Cancel-Lock: sha1:vUasZwFDpIT2ZoiekGjPnOwzuAs= Mail-Copies-To: nobody X-Editor: Emacs of course! User-Agent: slrn/0.9.9p1 (Linux) Original-Xref: news.stanford.edu gnu.emacs.help:174568 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:69642 Archived-At: Francis Moreau wrote: > pjb@informatimago.com (Pascal J. Bourguignon) writes: >> Well, there are several places where it's covered, but here is one >> where it's explicitely explained: >> >> (info "(elisp)Rearrangement") [...] > > ok that tells: "don't do that !" but it doesn't tell why not... just imagine a list as an object living somewhere in the memory of your computer. then try to figure out which list gets *modified* by the call to nconc, keeping in mind that nconc does *not* copy its arguments before doing its job. -- Joost Kremers joostkremers@yahoo.com Selbst in die Unterwelt dringt durch Spalten Licht EN:SiS(9)