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: Tools for those working heavily with strings Date: Sun, 24 Jul 2022 23:04:04 +0300 Message-ID: References: <3BF84EBF-B87A-49B2-9B0A-AE196B42F2DC@gnu.support> 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="31425"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/+ () (2022-06-11) Cc: tomas@tuxteam.de, help-gnu-emacs@gnu.org To: carlmarcos@tutanota.com Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Sun Jul 24 22:06:48 2022 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 1oFhsF-0007yB-Dd for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 24 Jul 2022 22:06:47 +0200 Original-Received: from localhost ([::1]:35522 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oFhsD-0005Bc-Up for geh-help-gnu-emacs@m.gmane-mx.org; Sun, 24 Jul 2022 16:06:45 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:50994) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oFhqy-0005Ag-UD for help-gnu-emacs@gnu.org; Sun, 24 Jul 2022 16:05:29 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:33649) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oFhqx-0003be-Ct for help-gnu-emacs@gnu.org; Sun, 24 Jul 2022 16:05:28 -0400 Original-Received: from localhost ([::ffff:154.224.9.22]) (AUTH: PLAIN admin, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 00000000000A5C1D.0000000062DDA603.000003B9; Sun, 24 Jul 2022 13:05:23 -0700 Mail-Followup-To: carlmarcos@tutanota.com, tomas@tuxteam.de, 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, T_SCC_BODY_TEXT_LINE=-0.01 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:138600 Archived-At: * carlmarcos--- via Users list for the GNU Emacs text editor [2022-07-24 14:43]: > What can I use to test whether a string in composed of whitespace or is empty? string-empty-p is a byte-compiled Lisp function in ‘simple.el’. (string-empty-p STRING) (string-empty-p "") ⇒ t But for my understanding string may be considered empty if it has white space only, thus: (string-blank-p " ") ⇒ 0 string-blank-p is a byte-compiled Lisp function in ‘subr-x.el’. (string-blank-p STRING) Check whether STRING is either empty or only whitespace. The following characters count as whitespace here: space, tab, newline and carriage return. -- Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns In support of Richard M. Stallman https://stallmansupport.org/