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: Thu, 17 Jun 2021 01:24:04 +0200 Message-ID: <87sg1hs8a3.fsf@zoho.eu> References: <87zgvs2bup.fsf@zoho.eu> <87y2bby1kr.fsf@zoho.eu> <20210615091834.GB24886@tuxteam.de> <87im2ewr3k.fsf@zoho.eu> <20210616072819.GB17919@tuxteam.de> <87im2eufop.fsf@posteo.net> <20210616185451.GB18839@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="1443"; 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:/Buazf/OLO7Ma4xA2ZjapHecszQ= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Jun 17 01:25:46 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 1lteun-0000EV-HD for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 17 Jun 2021 01:25:45 +0200 Original-Received: from localhost ([::1]:53500 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lteul-0003e6-4p for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 16 Jun 2021 19:25:43 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:48786) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lteu8-0003di-R6 for help-gnu-emacs@gnu.org; Wed, 16 Jun 2021 19:25:04 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:44016) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lteu7-0003te-BZ for help-gnu-emacs@gnu.org; Wed, 16 Jun 2021 19:25:04 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1lteu5-0009zB-LS for help-gnu-emacs@gnu.org; Thu, 17 Jun 2021 01:25:01 +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:130937 Archived-At: tomas wrote: > On the contrary. Mutable objects can change. Cons cells are > mutable objects, and thus lists, which are made of those. Indeed, I just thought of that :) (let ((cell (cons 'head 'tail))) (list (car cell) (cdr cell) )) ; (head tail) That means maybe I have to take what I just said back, it isn't the list that is the universal data structure, well, it is universal as well, but the even more basic and still universal data structure is the PAIR, or cons cell! -- underground experts united https://dataswamp.org/~incal