From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: Re: Appending lists Date: Wed, 16 Jun 2021 18:42:13 +0200 Message-ID: <87r1h1vk0q.fsf@zoho.eu> References: <4tl1yvylvg1fxx5eefjs9mnk.1623688568572@email.android.com> <87o8c8l32h.fsf@posteo.net> <87zgvs2bup.fsf@zoho.eu> <87y2bby1kr.fsf@zoho.eu> <20210615091834.GB24886@tuxteam.de> <87im2ewr3k.fsf@zoho.eu> <20210616072819.GB17919@tuxteam.de> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="27105"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:WX92aro+YozJbpxC55G2ymUL9G8= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Wed Jun 16 18:42:50 2021 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1ltYcs-0006nA-2I for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 16 Jun 2021 18:42:50 +0200 Original-Received: from localhost ([::1]:41992 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ltYcr-0003jv-36 for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 16 Jun 2021 12:42:49 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:42362) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ltYcU-0003hT-J0 for help-gnu-emacs@gnu.org; Wed, 16 Jun 2021 12:42:26 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:43036) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ltYcS-0006XR-VY for help-gnu-emacs@gnu.org; Wed, 16 Jun 2021 12:42:26 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1ltYcR-0006D6-6K for help-gnu-emacs@gnu.org; Wed, 16 Jun 2021 18:42:23 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 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-mx.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.io gmane.emacs.help:130909 Archived-At: tomas wrote: >> Well, let's see, `nreverse' has updated the data without >> setting the variables to whatever desired values they >> should take > > It can't. It's a function. > > Doing (foo x y) will *never* change "the variable x" -- > unless foo is a macro/special form. Well, OK, I didn't mean that `nreverse' should do it, rather the programmer didn't use `nreverse' in a setting, perhaps combined with `setq' as you yourself mention would be the easiest way... Maybe that still isn't a guarantee nreverse can't screw up something else just the same, unsure how to "partition" or isolate it if you will? >> so what is left is the variables reference to the first >> data item (the car), after that tho 1 doesn't have a cdr >> anymore and 3 has '(2 1), not '(4 5 6). > > You can put it this way... if you want to prevent yourself > from wrapping your head around it. > > You should draw your box-and-pointer diagrams [1]. Then, > you'd get that talking about "the 3" is dangerous talk :) OK, get back to you if/when I do it. -- underground experts united https://dataswamp.org/~incal