From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Marcin Borkowski Newsgroups: gmane.emacs.help Subject: Why doesn't nconc change my variable? Date: Sun, 05 Oct 2014 03:36:49 +0200 Message-ID: <87y4svl2ku.fsf@wmi.amu.edu.pl> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1412473045 21790 80.91.229.3 (5 Oct 2014 01:37:25 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 5 Oct 2014 01:37:25 +0000 (UTC) To: "help-gnu-emacs\@gnu.org" Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sun Oct 05 03:37:20 2014 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XaalD-0000gH-Jt for geh-help-gnu-emacs@m.gmane.org; Sun, 05 Oct 2014 03:37:19 +0200 Original-Received: from localhost ([::1]:45821 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XaalD-0003a9-99 for geh-help-gnu-emacs@m.gmane.org; Sat, 04 Oct 2014 21:37:19 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:57862) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xaakx-0003Z0-V8 for help-gnu-emacs@gnu.org; Sat, 04 Oct 2014 21:37:09 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Xaaks-0006bD-9A for help-gnu-emacs@gnu.org; Sat, 04 Oct 2014 21:37:03 -0400 Original-Received: from msg.wmi.amu.edu.pl ([2001:808:114:2::50]:59742) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xaaks-0006Y7-2H for help-gnu-emacs@gnu.org; Sat, 04 Oct 2014 21:36:58 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by msg.wmi.amu.edu.pl (Postfix) with ESMTP id C83C550777 for ; Sun, 5 Oct 2014 03:36:55 +0200 (CEST) Original-Received: from msg.wmi.amu.edu.pl ([127.0.0.1]) by localhost (msg.wmi.amu.edu.pl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7atOGl6V53TP for ; Sun, 5 Oct 2014 03:36:55 +0200 (CEST) Original-Received: from localhost (111-128.echostar.pl [213.156.111.128]) by msg.wmi.amu.edu.pl (Postfix) with ESMTPSA id 9E67550742 for ; Sun, 5 Oct 2014 03:36:55 +0200 (CEST) X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2001:808:114:2::50 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 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-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:100276 Archived-At: Hi list, I don't get it. (setq my-list ()) (nconc my-list '("wtf")) and my-list is still nil. If, OTOH, I do (setq my-list ()) (setq my-list (nconc my-list '("wtf"))) my-list is ("wtf"). Why is that so? I though nconc is supposed to change all its arguments but the last one. Is the latter construct a correct way of adding an element at the end of the list? Best, -- Marcin Borkowski http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski Adam Mickiewicz University