From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: `append' vs. `nconc' Date: Fri, 01 Jan 2016 14:23:26 +0100 Message-ID: <87lh89tovl.fsf@debian.uxu> References: <568164D8.6050700@ojkastl.de> <87io3iyr7t.fsf@debian.uxu> <87si2kezg1.fsf@mithlond.arda> <87a8osrlj4.fsf_-_@debian.uxu> <87lh8bgafa.fsf@mithlond.arda> <87io3fdqfm.fsf@mithlond.arda> <87mvsqv52v.fsf@debian.uxu> <87wprucrlz.fsf@mithlond.arda> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1451654732 4731 80.91.229.3 (1 Jan 2016 13:25:32 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 1 Jan 2016 13:25:32 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Jan 01 14:25:20 2016 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 1aEzhn-0001Xc-7V for geh-help-gnu-emacs@m.gmane.org; Fri, 01 Jan 2016 14:25:19 +0100 Original-Received: from localhost ([::1]:35925 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aEzhm-000162-Gh for geh-help-gnu-emacs@m.gmane.org; Fri, 01 Jan 2016 08:25:18 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:42810) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aEzhc-00015q-BJ for help-gnu-emacs@gnu.org; Fri, 01 Jan 2016 08:25:09 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aEzhY-0006QK-Bn for help-gnu-emacs@gnu.org; Fri, 01 Jan 2016 08:25:08 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:51122) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aEzhY-0006QE-5J for help-gnu-emacs@gnu.org; Fri, 01 Jan 2016 08:25:04 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1aEzhX-0001HJ-6R for help-gnu-emacs@gnu.org; Fri, 01 Jan 2016 14:25:03 +0100 Original-Received: from nl106-137-56.student.uu.se ([130.243.137.56]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 01 Jan 2016 14:25:03 +0100 Original-Received: from embe8573 by nl106-137-56.student.uu.se with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Fri, 01 Jan 2016 14:25:03 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Original-Lines: 24 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: nl106-137-56.student.uu.se Mail-Copies-To: never User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) Cancel-Lock: sha1:7MMx2Ww9/xx1ZyRprZrlXiR/o5s= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 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:108564 Archived-At: Teemu Likonen writes: > LIST function creates a fresh list when it is > evaluated, usually at runtime. The following applies > to the Common Lisp language: Literal objects created > with ' ` (QUOTE ...) "string" etc. might be created > at compile time. Such objects might even be shared > by all instances of such literal object. Common Lisp > compilers are allowed to do that. So, the literal > list '(a b c) in one place might actually become the > very same (as in EQ) object as literal '(a b c) in > somewhere else. If you mutate one object the results > may show everywhere, which is not usually wanted. > > Even though it may not apply to Emacs Lisp or all > Common Lisp compilers it's good habit to not mutate > literally created objects. Be functional with them! OK, then what functions, other than `nconc', are mutators (or, how do you now)? -- underground experts united http://user.it.uu.se/~embe8573