From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Xue Fuqiao Newsgroups: gmane.emacs.help Subject: About `constrain-to-field' Date: Mon, 18 Mar 2013 22:20:37 +0800 Organization: The Church of Emacs Message-ID: <20130318222037.e6e17edb5bc749fd27052199@gmail.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1363616467 7310 80.91.229.3 (18 Mar 2013 14:21:07 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 18 Mar 2013 14:21:07 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Mar 18 15:21:30 2013 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 1UHawL-00047y-Di for geh-help-gnu-emacs@m.gmane.org; Mon, 18 Mar 2013 15:21:29 +0100 Original-Received: from localhost ([::1]:42016 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UHavy-0005Nq-EA for geh-help-gnu-emacs@m.gmane.org; Mon, 18 Mar 2013 10:21:06 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:50616) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UHavh-0005N4-JN for help-gnu-emacs@gnu.org; Mon, 18 Mar 2013 10:20:52 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UHavf-0007CC-Ha for help-gnu-emacs@gnu.org; Mon, 18 Mar 2013 10:20:49 -0400 Original-Received: from mail-pb0-f42.google.com ([209.85.160.42]:38117) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UHavf-0007BW-BE for help-gnu-emacs@gnu.org; Mon, 18 Mar 2013 10:20:47 -0400 Original-Received: by mail-pb0-f42.google.com with SMTP id xb4so6459284pbc.15 for ; Mon, 18 Mar 2013 07:20:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:date:from:to:subject:message-id:organization:x-mailer :mime-version:content-type:content-transfer-encoding; bh=8E0ZnR/p67pU+XigYlgt71AKKnMoXC6EPsX5kBSoQBE=; b=tVSzdMYYl07VoOIUsiRlK8rS/lf2469HSntAa1k1T/75tvGEe4zGQYi8y2/nqcYfuA /PtNJn7GkPmnq2VD36enfH4F1+Qzviih8jpy8LUZkpSxoxIGxe2CMOv09UWEeJ0+Duev vJsmU25dG+7N/KupL2YyjXAwr4VTzdyH/xCEymJChJT9FEZw1EJij7glp+aaBbaPUl7N QW1oE8P7CQmaD2PvPQ9aW7I8YkHOiANUGY3Bnj6et6jimrJsMjKWjPzVnIi3Wh6Yu0ai wEudh8zKftkz86Tg3oTzhQQpf3OetIFFEmx/8u1xBiRuE+b9YZ9G1jx4nV+gU0DFgHPC XCfw== X-Received: by 10.68.201.227 with SMTP id kd3mr32981234pbc.65.1363616446647; Mon, 18 Mar 2013 07:20:46 -0700 (PDT) Original-Received: from Emacs ([192.81.128.82]) by mx.google.com with ESMTPS id ol7sm20355796pbb.14.2013.03.18.07.20.42 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 18 Mar 2013 07:20:45 -0700 (PDT) X-Mailer: Sylpheed 3.2.0 (GTK+ 2.24.13; x86_64-pc-linux-gnu) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 209.85.160.42 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:89580 Archived-At: I have read (info "(elisp) Fields") and doc string of the function `constrain-to-field', but I cannot understand what this function does, especially for its optional arguments. I've searched the archive of this mailing list, but the only two results are about whitespace characters removing. Maybe I need example(s) and some explanation. -- Xue Fuqiao http://www.gnu.org/software/emacs/