From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Marcin Borkowski Newsgroups: gmane.emacs.help Subject: Re: [External] : How to create a higher order function? Date: Mon, 27 Sep 2021 12:10:11 +0200 Message-ID: <87h7e69vng.fsf@mbork.pl> References: <87k0jawotx.fsf@mbork.pl> <87czoyfipj.fsf@mbork.pl> <87k0j6gvpd.fsf@zoho.eu> <871r5dhp9q.fsf@zoho.eu> <87tui99n63.fsf@mbork.pl> <87mto0usgs.fsf@zoho.eu> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="30690"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: mu4e 1.1.0; emacs 28.0.50 Cc: help-gnu-emacs@gnu.org To: Emanuel Berg Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon Sep 27 12:11:58 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 1mUnc6-0007nH-1j for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 27 Sep 2021 12:11:58 +0200 Original-Received: from localhost ([::1]:56670 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mUnc2-0001lP-Lc for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 27 Sep 2021 06:11:56 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:60422) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mUnai-0001fc-AF for help-gnu-emacs@gnu.org; Mon, 27 Sep 2021 06:10:32 -0400 Original-Received: from mail.mojserwer.eu ([195.110.48.8]:37898) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mUnaZ-0001Iz-4x for help-gnu-emacs@gnu.org; Mon, 27 Sep 2021 06:10:32 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by mail.mojserwer.eu (Postfix) with ESMTP id EB65DE669E; Mon, 27 Sep 2021 12:10:17 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at mail.mojserwer.eu Original-Received: from mail.mojserwer.eu ([127.0.0.1]) by localhost (mail.mojserwer.eu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XAplE4zAp5DG; Mon, 27 Sep 2021 12:10:15 +0200 (CEST) Original-Received: from localhost (83.8.136.117.ipv4.supernova.orange.pl [83.8.136.117]) by mail.mojserwer.eu (Postfix) with ESMTPSA id F2C77E644B; Mon, 27 Sep 2021 12:10:14 +0200 (CEST) In-reply-to: <87mto0usgs.fsf@zoho.eu> Received-SPF: pass client-ip=195.110.48.8; envelope-from=mbork@mbork.pl; helo=mail.mojserwer.eu X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_PASS=-0.001, T_SPF_HELO_TEMPERROR=0.01 autolearn=ham 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:133289 Archived-At: On 2021-09-26, at 01:48, Emanuel Berg via Users list for the GNU Emacs text editor wrote: > Marcin Borkowski wrote: > >>>> RMS's arguments are specifically for users of an editing >>>> environment such as Emacs. They go beyond the general >>>> arguments for providing dynamic binding (in addition to >>>> lexical) in Lisp. >>> >>> Again, if it is the options argument I agree that's a good >>> method to do it however I would formulate that as "we >>> implement options by way of global variables", I don't see >>> how dynamic/special vs static/lexical really applies? >> >> IIUC, if these (global) variables were lexically bound, the >> whole idea wouldn't work. > > Global variables are present in many languages that do not > mention dynamic/special vs static/lexical. > >> Global/local has nothing to do with it. > > If they were local, how would people set them? Also if they > were local, how would developers add e.g. another function > that used them? Again: of course they couldn't be local. But if they were global static, the whole "option setting" wouldn't work. Simple as that. If you want to see for yourself, create a lexically bound global "option" and try to make it work. Best, -- Marcin Borkowski http://mbork.pl