From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: compute ISBN-10, char-to-int? Date: Sat, 07 Sep 2019 15:01:40 -0400 Message-ID: References: <868sr3le7s.fsf@zoho.eu> <20190905064437.GA18252@tuxteam.de> <83a7bi7gzs.fsf@gnu.org> <20190905190336.GB9015@tuxteam.de> <83woek3twa.fsf@gnu.org> <83v9u43qo7.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="218845"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Sep 07 21:02:05 2019 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1i6fyG-000uk1-Kd for geh-help-gnu-emacs@m.gmane.org; Sat, 07 Sep 2019 21:02:04 +0200 Original-Received: from localhost ([::1]:36752 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i6fyF-0007Lr-Ib for geh-help-gnu-emacs@m.gmane.org; Sat, 07 Sep 2019 15:02:03 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:50156) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i6fy5-0007LZ-Sx for help-gnu-emacs@gnu.org; Sat, 07 Sep 2019 15:01:54 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i6fy4-0004e2-9J for help-gnu-emacs@gnu.org; Sat, 07 Sep 2019 15:01:53 -0400 Original-Received: from 195-159-176-226.customer.powertech.no ([195.159.176.226]:40674 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i6fy2-0004ZP-AC for help-gnu-emacs@gnu.org; Sat, 07 Sep 2019 15:01:52 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.89) (envelope-from ) id 1i6fxx-000uOO-JD for help-gnu-emacs@gnu.org; Sat, 07 Sep 2019 21:01:45 +0200 X-Injected-Via-Gmane: http://gmane.org/ Cancel-Lock: sha1:C7bcf6HKCVQpOoBfndhJ7lS5CvY= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 195.159.176.226 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.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:121473 Archived-At: >> I must admit that it seems highly unlikely it will change in the >> foreseeable future, but it's always a possibility > More than highly unlikely, I'd say. Agreed. But even for those paranoid enough to worry about that, (+ n ?0) and (- c ?0) should be safe ways to convert between a digit character and its numerical value. Stefan