From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Barry Margolin Newsgroups: gmane.emacs.help Subject: Re: How to test if the current line contains only white-spache? Date: Sat, 14 Nov 2015 13:42:46 -0500 Organization: A noiseless patient Spider Message-ID: References: <87r3js7e8l.fsf@linux-qg7d.fritz.box> NNTP-Posting-Host: plane.gmane.org X-Trace: ger.gmane.org 1447587117 4517 80.91.229.3 (15 Nov 2015 11:31:57 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sun, 15 Nov 2015 11:31:57 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sun Nov 15 12:31:46 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 1ZxvX1-0005Uo-ND for geh-help-gnu-emacs@m.gmane.org; Sun, 15 Nov 2015 12:31:40 +0100 Original-Received: from localhost ([::1]:42047 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZxvX0-0002nf-Rj for geh-help-gnu-emacs@m.gmane.org; Sun, 15 Nov 2015 06:31:38 -0500 Original-Path: usenet.stanford.edu!news.kjsl.com!us.feeder.erje.net!feeder.erje.net!1.eu.feeder.erje.net!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!barmar.motzarella.org!.POSTED!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 29 Injection-Info: barmar.motzarella.org; posting-host="2be9e9f5dd9af768b8861af71b85fc28"; logging-data="18616"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+w9DJ3n/QHUNMnAAwZv+bv" User-Agent: MT-NewsWatcher/3.5.3b3 (Intel Mac OS X) Cancel-Lock: sha1:AIi9VyivmgoTfjR+8Nb2WRkwUJg= Original-Xref: usenet.stanford.edu gnu.emacs.help:215783 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:108076 Archived-At: In article <87r3js7e8l.fsf@linux-qg7d.fritz.box>, Rolf Ade wrote: > For some random minor elisp code I need to know, if the current line > contains only white-space characters[1]. > > I came up with this somewhat convoluted code: > > (beginning-of-line) > (skip-chars-forward " \t") > (let ((text-start (current-column))) > (end-of-line) > (if (= text-start (current-column)) > t > nil) > > (and that is, obviously, without saving point position and wrapping > into and a defun and maybe other bells and whistles). > > I wonder, what much simpler and more elegant solution I'm missing. (save-excursion (beginning-of-line) (looking-at "[ \t]*$")) -- Barry Margolin, barmar@alum.mit.edu Arlington, MA *** PLEASE post questions in newsgroups, not directly to me ***