From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: Re: How to read an integer from the minibuffer Date: Sat, 13 Nov 2021 11:44:39 +0300 Message-ID: References: <993162c2a13d5ea3b0aa@heytings.org> <87lf1u9pdj.fsf@zoho.eu> <993162c2a1f85349fcfa@heytings.org> <87fss29on7.fsf@zoho.eu> <87v90x5g7p.fsf@zoho.eu> <20211112202423.GA25370@tuxteam.de> <20211113081745.GB15896@tuxteam.de> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="13455"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0.7+183 (3d24855) (2021-05-28) Cc: help-gnu-emacs@gnu.org To: tomas@tuxteam.de Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sat Nov 13 09:49:15 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 1mloip-0003Eu-57 for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 13 Nov 2021 09:49:15 +0100 Original-Received: from localhost ([::1]:34710 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mloin-0005Kv-NQ for geh-help-gnu-emacs@m.gmane-mx.org; Sat, 13 Nov 2021 03:49:13 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:47736) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mloiC-0005Id-RY for help-gnu-emacs@gnu.org; Sat, 13 Nov 2021 03:48:36 -0500 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:34965) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mloiA-0002XB-Jh for help-gnu-emacs@gnu.org; Sat, 13 Nov 2021 03:48:36 -0500 Original-Received: from localhost ([::ffff:41.75.188.219]) (AUTH: PLAIN admin, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 0000000000031EC1.00000000618F7BDA.0000757F; Sat, 13 Nov 2021 01:48:20 -0700 Mail-Followup-To: tomas@tuxteam.de, help-gnu-emacs@gnu.org Content-Disposition: inline In-Reply-To: <20211113081745.GB15896@tuxteam.de> Received-SPF: pass client-ip=217.170.207.13; envelope-from=bugs@gnu.support; helo=stw1.rcdrun.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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:134564 Archived-At: * tomas@tuxteam.de [2021-11-13 11:18]: > On Sat, Nov 13, 2021 at 09:36:39AM +0300, Jean Louis wrote: > > * tomas@tuxteam.de [2021-11-12 23:25]: > > [...] > > > > Why not simply numberp? > > > > > > (and (numberp s) (string-to-number s)) > > > > (numberp "123") ⇒ nil > > > > It checks if object is number. That is why it is not usable to check > > if string is actual number. > > D'oh, you are right. That'd been too easy ;-) > > It seems you'll have to go with a regexp, then do string-to-number. > Then, again, you'll have to decide: what subset of Emacs's number > input syntax do you want to implement? Signed/unsigned? Integers? > Floats? Exponential notation? Bases other than 10? That helped me realize I have to call function different: (defun string-is-positive-integer-p (s) "Return number only if string is positive integer, otherwise NIL." (let* ((s (string-trim s))) (cond ((seq-empty-p s) nil) ((string-match "[^0123456789\\.]" s) nil) ((numberp (string-to-number s)) (string-to-number s))))) -- Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns In support of Richard M. Stallman https://stallmansupport.org/