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: append, push, and add-to-list. Date: Mon, 05 Jul 2021 08:32:54 +0200 Message-ID: <87zgv1gtih.fsf@zoho.eu> References: <8735suaw71.fsf@zoho.eu> 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="21444"; 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:rOMk4wOsqng2HZqbVWd7k5/6e5g= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Jul 05 08:33:58 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 1m0IB4-0005PL-Q7 for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 05 Jul 2021 08:33:58 +0200 Original-Received: from localhost ([::1]:37080 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1m0IB3-0005DG-ST for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 05 Jul 2021 02:33:57 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:55304) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m0IAJ-0005D4-UX for help-gnu-emacs@gnu.org; Mon, 05 Jul 2021 02:33:11 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:36300) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1m0IAD-00027V-2s for help-gnu-emacs@gnu.org; Mon, 05 Jul 2021 02:33:10 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1m0IAA-0004Fz-65 for help-gnu-emacs@gnu.org; Mon, 05 Jul 2021 08:33:02 +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: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, 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:131475 Archived-At: Hongyi Zhao wrote: > (equal '() nil) > t > > So, I would rather write it like this: > > (defvar lst nil) But with '() you see that it is (an empty) list: (defvar lst) (setq lst '()) -- underground experts united https://dataswamp.org/~incal