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: How to read an integer from the minibuffer Date: Tue, 16 Nov 2021 07:24:54 +0100 Message-ID: <87pmr039e1.fsf@zoho.eu> References: <87y25u9pzj.fsf@zoho.eu> <993162c2a13d5ea3b0aa@heytings.org> <87lf1u9pdj.fsf@zoho.eu> <993162c2a1f85349fcfa@heytings.org> <87fss29on7.fsf@zoho.eu> <87v90x5g7p.fsf@zoho.eu> <20211112202423.GA25370@tuxteam.de> <87ilwx5b4f.fsf@zoho.eu> 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="9140"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:bMwMgauNf1fjJrEXEHhOCV0vtg4= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Tue Nov 16 07:31:05 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 1mmrzl-0002Ae-72 for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 16 Nov 2021 07:31:05 +0100 Original-Received: from localhost ([::1]:50522 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mmrzj-0004XF-8F for geh-help-gnu-emacs@m.gmane-mx.org; Tue, 16 Nov 2021 01:31:03 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:44088) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mmrys-0004VP-Sk for help-gnu-emacs@gnu.org; Tue, 16 Nov 2021 01:30:10 -0500 Original-Received: from ciao.gmane.io ([116.202.254.214]:49896) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mmryo-0007sW-Nn for help-gnu-emacs@gnu.org; Tue, 16 Nov 2021 01:30:10 -0500 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1mmryj-0000p3-Lc for help-gnu-emacs@gnu.org; Tue, 16 Nov 2021 07:30:01 +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-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:134622 Archived-At: Jean Louis wrote: > I do not see how it helps in my use case as I want to ensure > that number in the string is actual number and nothing else. See this function, it is a workaround. But the problem is that `string-to-number' returns 0 on "0" (which is good) but also on "not a number". Don't know what genious came up with that since it is an obvious collision/ambiguity. (defun read-integer () (let ((str) (str-number) (n) ) (cl-loop until (progn (setq str (read-string "integer: ")) (if (string= str "0") (setq n 0) (setq str-number (string-to-number str)) (unless (= str-number 0) (setq n str-number) )) (integerp n)) ) n) ) ;; (read-integer) -- underground experts united https://dataswamp.org/~incal