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: [External] : Use the characters "+" and "-" in regular expressions Date: Fri, 21 May 2021 08:48:37 +0300 Message-ID: References: <20210520082613.GC1127@tuxteam.de> <20210520095603.GD1127@tuxteam.de> <20210520102244.GE1127@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="1718"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0.6 (2021-03-06) Cc: "help-gnu-emacs@gnu.org" To: steve-humphreys@gmx.com Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri May 21 07:50:35 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 1ljy3P-0000Iw-DJ for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 21 May 2021 07:50:35 +0200 Original-Received: from localhost ([::1]:47918 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ljy3O-0001Xs-B2 for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 21 May 2021 01:50:34 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:54982) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ljy2a-0001U3-Uk for help-gnu-emacs@gnu.org; Fri, 21 May 2021 01:49:44 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:58067) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ljy2W-0005YP-Kf for help-gnu-emacs@gnu.org; Fri, 21 May 2021 01:49:44 -0400 Original-Received: from localhost ([::ffff:102.85.29.242]) (AUTH: PLAIN admin, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 00000000000ADF01.0000000060A749F2.00006AFC; Thu, 20 May 2021 22:49:37 -0700 Mail-Followup-To: steve-humphreys@gmx.com, "help-gnu-emacs@gnu.org" Content-Disposition: inline In-Reply-To: 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: 2.1.23 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:129989 Archived-At: * steve-humphreys@gmx.com [2021-05-20 17:28]: > I have settled with > > (string-match "^[:blank:]*$" s) > > This would match only strings with spaces, not sentences with > spaces. What do you think? That one is good to match nothing: (string-match "^[:blank:]*$" "") ⇒ 0 (string-match "^[:blank:]*$" " ") ⇒ nil (string-match "^[:blank:]*$" " ") ⇒ nil You have to read the manual: (info "(elisp) Regular Expressions") -- Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns Sign an open letter in support of Richard M. Stallman https://stallmansupport.org/ https://rms-support-letter.github.io/