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: [External] : Re: Lions & tigers & variables - Oh my! [was: Lisp error on function :documentation] Date: Wed, 19 Oct 2022 22:20:22 +0200 Message-ID: <87lepba7ll.fsf@dataswamp.org> References: <87y1tcbtoo.fsf@dataswamp.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="14913"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:OaeNGemD+iSG0HH5NFbPUHyEChQ= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Thu Oct 20 10:38:47 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 1olR4g-0003gr-SO for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 20 Oct 2022 10:38:46 +0200 Original-Received: from localhost ([::1]:35596 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1olR4f-00025E-Q0 for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 20 Oct 2022 04:38:45 -0400 Original-Received: from [::1] (helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1olR4f-0000I0-ML for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 20 Oct 2022 04:38:45 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:39072) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1olFYK-0003yb-L1 for help-gnu-emacs@gnu.org; Wed, 19 Oct 2022 16:20:36 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:56228) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1olFYI-0001kv-2b for help-gnu-emacs@gnu.org; Wed, 19 Oct 2022 16:20:36 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1olFYE-0002Y8-MR for help-gnu-emacs@gnu.org; Wed, 19 Oct 2022 22:20:30 +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: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Thu, 20 Oct 2022 04:37:24 -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:140183 Archived-At: Drew Adams wrote: >>> _*ALL*_ variables can (really, not virtually) be >>> eliminated, with combinatory logic. Magic. >> >> But not in practise writing code ... > > https://en.wikipedia.org/wiki/Function-level_programming Okay, so what's the most impressive and useful program ever written without the use of a single variable? > https://www.cs.ucf.edu/~dcm/Teaching/COT4810-Fall%202012/Literature/Backus.pdf Thanks, we should collect all such links on the wiki if someone cares to mail the material to the maintainer(s) ... -- underground experts united https://dataswamp.org/~incal