From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: Another question about lambdas Date: Wed, 18 Jan 2023 12:47:00 +0100 Message-ID: <877cxkysi3.fsf@dataswamp.org> References: <87tu23kw9x.fsf@web.de> <861qp67wgm.fsf@gnu.org> <87wn6yyflc.fsf@web.de> <871qp5o05o.fsf@web.de> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="19814"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:1KUM/F1GJbZzb6KRKjj11LoYilI= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Jan 19 12:39:07 2023 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 1pITG7-00052O-3O for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 19 Jan 2023 12:39:07 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pITFt-0002s8-7u; Thu, 19 Jan 2023 06:38:53 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pI6uP-0007Du-UB for help-gnu-emacs@gnu.org; Wed, 18 Jan 2023 06:47:14 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pI6uO-0002Nh-Br for help-gnu-emacs@gnu.org; Wed, 18 Jan 2023 06:47:13 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1pI6uK-0003Ps-NY for help-gnu-emacs@gnu.org; Wed, 18 Jan 2023 12:47:08 +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 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Thu, 19 Jan 2023 06:38:45 -0500 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-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:142404 Archived-At: tomas wrote: > When I try to explain that, one of the devices I use is the > idea of "space" (static) vs. "time" (dynamic). It sticks > with some people. What about just explaining the the dynamic `let' and the lexical (static) let? Theory doesn't help IME. With the lexical `let', those variables stay _here_ ... Unless they are already dynamic/special. Don't see any other use case of dynamic/special variables than options, but then isn't it that they are _global_ and now set temporarily to whatever value for the duration of the scope defined by the opening and closing parenthesis? So one should drop the talk of dynamic/special vs lexical/static and instead have one `locals' (with the same syntax and as let, but always lexical/static, even for dynamic/special ones) and then one `options', also with the same syntax, to set globals for a limited scope. That covers the global variables and the local ones so what's more to cover? -- underground experts united https://dataswamp.org/~incal