From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.help Subject: Re: How to count the number of occurrences of a character in a string? Date: Mon, 12 Oct 2015 21:18:05 -0400 Message-ID: References: <874mhvq3b2.fsf@mbork.pl> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1444699125 9143 80.91.229.3 (13 Oct 2015 01:18:45 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 13 Oct 2015 01:18:45 +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 Oct 13 03:18:36 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 1ZloEe-0000Fd-D1 for geh-help-gnu-emacs@m.gmane.org; Tue, 13 Oct 2015 03:18:36 +0200 Original-Received: from localhost ([::1]:59840 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZloEd-0002Y4-Ly for geh-help-gnu-emacs@m.gmane.org; Mon, 12 Oct 2015 21:18:35 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:53798) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZloES-0002Xz-3m for help-gnu-emacs@gnu.org; Mon, 12 Oct 2015 21:18:24 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZloEO-0003X8-VK for help-gnu-emacs@gnu.org; Mon, 12 Oct 2015 21:18:24 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:39857) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZloEO-0003X3-O2 for help-gnu-emacs@gnu.org; Mon, 12 Oct 2015 21:18:20 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZloEM-0008Qi-Sa for help-gnu-emacs@gnu.org; Tue, 13 Oct 2015 03:18:19 +0200 Original-Received: from 69-196-161-21.dsl.teksavvy.com ([69.196.161.21]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 13 Oct 2015 03:18:18 +0200 Original-Received: from monnier by 69-196-161-21.dsl.teksavvy.com with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Tue, 13 Oct 2015 03:18:18 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 9 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: 69-196-161-21.dsl.teksavvy.com User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) Cancel-Lock: sha1:TrPbFYedYzDMJNxgIHBxdnTtA7M= 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:107600 Archived-At: > (setq str (substring-no-properties str (1+ match-pos))) This will give wrong results for regexp that use things like ^ and \`. Instead, you should keep using the same `str' and instead pass the `start' arg to string-match. Stefan