From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Robert Thorpe Newsgroups: gmane.emacs.help Subject: Re: Regex replace for numbers Date: Fri, 03 Oct 2014 02:41:32 +0100 Message-ID: <87tx3mx73n.fsf@robertthorpeconsulting.com> References: <87mw9ex8nk.fsf@wmi.amu.edu.pl> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1412300525 9783 80.91.229.3 (3 Oct 2014 01:42:05 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 3 Oct 2014 01:42:05 +0000 (UTC) Cc: help-gnu-emacs@gnu.org To: Marcin Borkowski Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Oct 03 03:41:58 2014 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 1XZrsc-0002Ui-1s for geh-help-gnu-emacs@m.gmane.org; Fri, 03 Oct 2014 03:41:58 +0200 Original-Received: from localhost ([::1]:37441 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XZrsb-0005zi-Ea for geh-help-gnu-emacs@m.gmane.org; Thu, 02 Oct 2014 21:41:57 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:47806) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XZrsL-0005zO-9v for help-gnu-emacs@gnu.org; Thu, 02 Oct 2014 21:41:48 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XZrsE-0002hX-Fj for help-gnu-emacs@gnu.org; Thu, 02 Oct 2014 21:41:41 -0400 Original-Received: from outbound-smtp01.blacknight.com ([81.17.249.7]:35586) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XZrsE-0002hT-9g for help-gnu-emacs@gnu.org; Thu, 02 Oct 2014 21:41:34 -0400 Original-Received: from mail.blacknight.com (pemlinmail05.blacknight.ie [81.17.254.26]) by outbound-smtp01.blacknight.com (Postfix) with ESMTP id 7B96199168 for ; Fri, 3 Oct 2014 01:39:34 +0000 (UTC) Original-Received: (qmail 31490 invoked from network); 3 Oct 2014 01:41:33 -0000 Original-Received: from unknown (HELO RTLaptop) (rt@robertthorpeconsulting.com@[109.76.111.239]) by 81.17.254.9 with ESMTPSA (DHE-RSA-AES128-SHA encrypted, authenticated); 3 Oct 2014 01:41:32 -0000 In-Reply-To: <87mw9ex8nk.fsf@wmi.amu.edu.pl> (message from Marcin Borkowski on Fri, 03 Oct 2014 03:07:59 +0200) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 81.17.249.7 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:100240 Archived-At: Marcin Borkowski writes: > On 2014-10-03, at 02:33, Robert Thorpe wrote: > >> I'm not very good with Emacs regex, I need to search-and-replace on some numbers. >> >> How can I detect unnecessary zeros at the end of a number and chop them >> off? E.g. turn 567.45000 to 567.45 without also turning 6700 to 67. > > What about > > M-% > \([0-9]+\)\.\([0-9]*?\)0+ RET > \1.\2 RET That needs C-M-%, regexp-replace. If I have a number like 456.0040 then it replaces the first two zeros giving 456.40, which is wrong. It seems that shortest-match regexps aren't very useful here. If I remove the ? in the regexp then it works, but it only removes one layer of zeros at a time, so e.g. 567.45000 becomes 567.4500. BR, Robert Thorpe