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: Appending lists Date: Thu, 17 Jun 2021 01:44:39 +0200 Message-ID: <87bl85s7bs.fsf@zoho.eu> References: <87o8c8l32h.fsf@posteo.net> <87zgvs2bup.fsf@zoho.eu> <87y2bby1kr.fsf@zoho.eu> <20210615091834.GB24886@tuxteam.de> <87im2ewr3k.fsf@zoho.eu> <20210616072819.GB17919@tuxteam.de> <87im2dvjgl.fsf@zoho.eu> <20210616184915.GA18839@tuxteam.de> 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="19234"; 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:Ahh7WAl6Z7FpifnfkxVzUKvIL5U= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Jun 17 01:45:44 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 1ltfE7-0004qD-SW for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 17 Jun 2021 01:45:43 +0200 Original-Received: from localhost ([::1]:36110 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ltfE6-0003Kw-Sp for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 16 Jun 2021 19:45:42 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:52260) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ltfDW-0003J3-6e for help-gnu-emacs@gnu.org; Wed, 16 Jun 2021 19:45:06 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:56098) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ltfDT-0007JQ-NM for help-gnu-emacs@gnu.org; Wed, 16 Jun 2021 19:45:05 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1ltfDR-0003vR-Oa for help-gnu-emacs@gnu.org; Thu, 17 Jun 2021 01:45:01 +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:130943 Archived-At: Stefan Monnier via Users list for the GNU Emacs text editor wrote: >> To put a point across it would be better to announce or >> make a title that you don't talk how "variable never >> changes", but you talk about the structures in memory and >> somewhat interesting though practically within the spoken >> context useless information. What matters for programmer is >> that variable A instead of holding value 1 now has value 2, >> that is a change, and how that change was internally >> accomplished does not change the fact that A is now not 1 >> but is 2. > > That's the problem with mutation. In a language like Haskell > where mutation is not allowed, when you have Of course it isn't allowed in Haskell! In Haskell, if your program does anything, that's not encouraged and you should put that in a special part of the code so that everyone can be aware of it and not get to close :) -- underground experts united https://dataswamp.org/~incal