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: Is there a way of setting a variable only when it exists? Date: Tue, 15 Mar 2022 09:14:10 +0100 Message-ID: <87k0cv3a5p.fsf@zoho.eu> References: <87lexdul8e.fsf@mbork.pl> <878rtcir1h.fsf@zoho.eu> <87a6drviwp.fsf@mbork.pl> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="12725"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:lJ/ZQQlL/npBcp1gWwLTITc+UlE= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Mar 15 16:42:52 2022 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 1nU9Jz-00038e-GL for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 15 Mar 2022 16:42:51 +0100 Original-Received: from localhost ([::1]:51082 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nU9Jy-0002Zc-93 for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 15 Mar 2022 11:42:50 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:45610) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nU2Jz-0008HF-FJ for help-gnu-emacs@gnu.org; Tue, 15 Mar 2022 04:14:23 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:45104) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nU2Jx-00081o-S5 for help-gnu-emacs@gnu.org; Tue, 15 Mar 2022 04:14:23 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1nU2Jv-0006j5-06 for help-gnu-emacs@gnu.org; Tue, 15 Mar 2022 09:14:19 +0100 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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Tue, 15 Mar 2022 11:35:43 -0400 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 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:136585 Archived-At: tomas wrote: > "Customizable variables", also called "user options", are > global Lisp variables whose values can be set through the > Customize interface. Unlike other global variables, which > are defined with `defvar' [...] customizable variables are > defined using the `defcustom' macro. In addition to calling > `defvar' as a subroutine, `defcustom' states how the > variable should be displayed in the Customize interface, the > values it is allowed to take, etc. So an interface is used so that an interface can be displayed ... and those interfaces are ... the same? You hear how it sounds. Hands of data! There can be many ways to set data. But after the data is set nothing should be left _how_ and no special treatment should later be allowed based on what interface was used ... interface |~| data |#| programming logic (code) ↑ ↑ ↑ ↑ ↑ reinforced ↑ concrete ↑ wall brick wall -- underground experts united https://dataswamp.org/~incal