From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: using setq to create lists based on other lists... Date: Sun, 02 Dec 2018 10:07:29 -0500 Message-ID: References: <5C1642CD-F485-47CF-88B9-41D7960DDE80@gmail.com> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1543763164 22638 195.159.176.226 (2 Dec 2018 15:06:04 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sun, 2 Dec 2018 15:06:04 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sun Dec 02 16:06:00 2018 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1gTTJn-0005l9-Ml for geh-help-gnu-emacs@m.gmane.org; Sun, 02 Dec 2018 16:05:59 +0100 Original-Received: from localhost ([::1]:44857 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gTTLu-0005Dr-Ao for geh-help-gnu-emacs@m.gmane.org; Sun, 02 Dec 2018 10:08:10 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:58885) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gTTLT-0005DZ-Gc for help-gnu-emacs@gnu.org; Sun, 02 Dec 2018 10:07:44 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gTTLP-0000m1-H9 for help-gnu-emacs@gnu.org; Sun, 02 Dec 2018 10:07:43 -0500 Original-Received: from [195.159.176.226] (port=50964 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gTTLP-0000lf-9k for help-gnu-emacs@gnu.org; Sun, 02 Dec 2018 10:07:39 -0500 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1gTTJE-0004rs-Ek for help-gnu-emacs@gnu.org; Sun, 02 Dec 2018 16:05:24 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 15 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:vvTopDz4NKEVW3sQ9XPQHB7uAvA= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 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 Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:118828 Archived-At: Here's another take on it: > If you do > (setcar list0 0) Why? Just don't use setcar/setcdr! > There are probably better ways to create lists based on other lists without > "linking" the two, so I'd like some information about that. The better way is to not modify the lists, so you're not affected by whether they're linked or not. Stefan