From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: How to test if the current line contains only white-spache? Date: Tue, 17 Nov 2015 01:26:42 +0100 Message-ID: <874mglbhdp.fsf@debian.uxu> References: <87r3js7e8l.fsf@linux-qg7d.fritz.box> <874mgnystc.fsf@point.pointsman.de> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1447722655 6117 80.91.229.3 (17 Nov 2015 01:10:55 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 17 Nov 2015 01:10:55 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Tue Nov 17 02:10:40 2015 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZyUnA-0007mn-7J for geh-help-gnu-emacs@m.gmane.org; Tue, 17 Nov 2015 02:10:40 +0100 Original-Received: from localhost ([::1]:54242 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZyUn9-0003SL-Py for geh-help-gnu-emacs@m.gmane.org; Mon, 16 Nov 2015 20:10:39 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:58842) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZyTx1-0007vi-37 for help-gnu-emacs@gnu.org; Mon, 16 Nov 2015 19:16:48 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZyTwx-0002hZ-SB for help-gnu-emacs@gnu.org; Mon, 16 Nov 2015 19:16:46 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:45192) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZyTwx-0002hU-LP for help-gnu-emacs@gnu.org; Mon, 16 Nov 2015 19:16:43 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZyTww-0005jV-Hk for help-gnu-emacs@gnu.org; Tue, 17 Nov 2015 01:16:42 +0100 Original-Received: from nl106-137-244.student.uu.se ([130.243.137.244]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 17 Nov 2015 01:16:42 +0100 Original-Received: from embe8573 by nl106-137-244.student.uu.se with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 17 Nov 2015 01:16:42 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Original-Lines: 34 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: nl106-137-244.student.uu.se Mail-Copies-To: never User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux) Cancel-Lock: sha1:/CXt1XEh3LHlTe10JBi76DIVb0c= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 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.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:108103 Archived-At: Rolf Ade writes: > Works fine and is much simpler. Thanks. Here is another solution that is all C, and doesn't move point. Is that an advantage? ... (Open question.) (defun blank-line () (interactive) (message (if (string-match "^[[:space:]]*$" (buffer-substring-no-properties (line-beginning-position) (line-end-position) )) "blank" "not so") )) Non-interactive use could be: (defun blank-line-p () (string-match "^[[:space:]]*$" (buffer-substring-no-properties (line-beginning-position) (line-end-position) ))) (blank-line-p) ; nil (progn (previous-line 2) (blank-line-p) ) ; 0, i.e. non-nil - (when 0 t) => t ; (when nil t) => nil Keep it up! -- underground experts united http://user.it.uu.se/~embe8573