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: don't understand setq-default Date: Sun, 18 Apr 2021 13:40:19 +0200 Message-ID: <87mttvx1lo.fsf@zoho.eu> 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="316"; 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:pSSEcO4RVJMn/volb4Rg1d6LUCA= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sun Apr 18 13:42:19 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 1lY5oh-000AXk-Bo for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 18 Apr 2021 13:42:19 +0200 Original-Received: from localhost ([::1]:55470 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lY5og-0000nb-FY for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 18 Apr 2021 07:42:18 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:33910) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lY5mx-0000dC-CS for help-gnu-emacs@gnu.org; Sun, 18 Apr 2021 07:40:31 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:45710) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lY5mv-0000sB-Tw for help-gnu-emacs@gnu.org; Sun, 18 Apr 2021 07:40:31 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1lY5mt-0008Ya-0W for help-gnu-emacs@gnu.org; Sun, 18 Apr 2021 13:40:27 +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:129026 Archived-At: I don't understand `setq-default', maybe I never did, unsure. The docstring isn't good, it only describes how it will happens which is intuitive at that (well, that's good that it) but not how and why it is used. You assign a variable I understand ultra-hd = 2160 ikr? ultra-hd is 2160! but full-hd is assigned the default value 1080 full-hd d= 1080 what does that mean, except for the obvious that d stands for "diversion"? the only thing I can make up, is that if the common-sense variable is unset, it falls back to 1080? but then where is this value stored? ( actual . default ) won't work (or actual default) cool but also won't work property? surely you don't have to look for it explicitly? built-in in some really clever way (really clever = everything you don't understand. stupid = everything you already know. and right in between? number 1) Here is the docstring, it gives the impression everyone already knows about it. And, if so, I have to give it to it, probably it makes a whole lot more sense, reight? (setq-default [VAR VALUE]...) Probably introduced at or before Emacs version 18. Set the default value of variable VAR to VALUE. VAR, the variable name, is literal (not evaluated); VALUE is an expression: it is evaluated and its value returned. The default value of a variable is seen in buffers that do not have their own values for the variable. More generally, you can use multiple variables and values, as in (setq-default VAR VALUE VAR VALUE...) This sets each VAR’s default value to the corresponding VALUE. The VALUE for the Nth VAR can refer to the new default values of previous VARs. -- underground experts united https://dataswamp.org/~incal