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: Thu, 20 May 2021 16:03:05 +0300 Message-ID: References: <20210520082613.GC1127@tuxteam.de> <20210520095603.GD1127@tuxteam.de> <20210520102244.GE1127@tuxteam.de> <20210520105035.GG1127@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="4620"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0.6 (2021-03-06) Cc: Christopher Dimech , "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 Thu May 20 15:05:20 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 1ljiMa-00011c-5i for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 20 May 2021 15:05:20 +0200 Original-Received: from localhost ([::1]:55770 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ljiMZ-0002RI-7F for geh-help-gnu-emacs@m.gmane-mx.org; Thu, 20 May 2021 09:05:19 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:40604) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ljiLy-0002P1-2b for help-gnu-emacs@gnu.org; Thu, 20 May 2021 09:04:42 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:43425) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ljiLv-00071z-Ty for help-gnu-emacs@gnu.org; Thu, 20 May 2021 09:04:41 -0400 Original-Received: from localhost ([::ffff:102.81.93.246]) (AUTH: PLAIN admin, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 00000000000ADF16.0000000060A65E65.0000740C; Thu, 20 May 2021 06:04:36 -0700 Mail-Followup-To: steve-humphreys@gmx.com, Christopher Dimech , "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:129970 Archived-At: * steve-humphreys@gmx.com [2021-05-20 14:41]: > > (string-match "[\s]+ " s) > > > > Matches any white-space character. > > That would actually match a sentence, which I don't want. > > What I like to match is a string composed only of whitespace. Did we not discuss it recently? This is how you can make negative match: (not (string-match "[^[:blank:]]" " ")) ⇒ t But if there is anything inside that is not blank character, it will not match: (not (string-match "[^[:blank:]]" " j")) ⇒ nil -- 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/