From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "weber" Newsgroups: gmane.emacs.help Subject: Re: Keep-only-column Date: 9 Feb 2007 02:47:44 -0800 Organization: http://groups.google.com Message-ID: <1171018064.772195.132380@a34g2000cwb.googlegroups.com> References: <1170962128.311804.182850@v45g2000cwv.googlegroups.com> <1170962615.632938.25870@j27g2000cwj.googlegroups.com> <531k72F1qnjq5U3@mid.individual.net> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" X-Trace: sea.gmane.org 1171021239 4288 80.91.229.12 (9 Feb 2007 11:40:39 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Fri, 9 Feb 2007 11:40:39 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Feb 09 12:40:33 2007 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1HFU7F-000189-Ee for geh-help-gnu-emacs@m.gmane.org; Fri, 09 Feb 2007 12:40:33 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1HFU7E-0008PP-U0 for geh-help-gnu-emacs@m.gmane.org; Fri, 09 Feb 2007 06:40:33 -0500 Original-Path: shelby.stanford.edu!headwall.stanford.edu!newsfeed.news2me.com!nx01.iad01.newshosting.com!newshosting.com!198.186.194.247.MISMATCH!news-out.readnews.com!news-xxxfer.readnews.com!postnews.google.com!a34g2000cwb.googlegroups.com!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 82 Original-NNTP-Posting-Host: 200.213.54.31 Original-X-Trace: posting.google.com 1171018072 11829 127.0.0.1 (9 Feb 2007 10:47:52 GMT) Original-X-Complaints-To: groups-abuse@google.com Original-NNTP-Posting-Date: Fri, 9 Feb 2007 10:47:52 +0000 (UTC) In-Reply-To: <531k72F1qnjq5U3@mid.individual.net> User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; pt-BR; rv:1.8.1.1) Gecko/20061204 Firefox/2.0.0.1,gzip(gfe),gzip(gfe) X-HTTP-Via: 1.1 fw.datacom-telematica.com.br:3128 (squid/2.5.STABLE6) Complaints-To: groups-abuse@google.com Injection-Info: a34g2000cwb.googlegroups.com; posting-host=200.213.54.31; posting-account=pG57fA0AAADtQ-4h1MyvjXjZpSNZC0zj Original-Xref: shelby.stanford.edu gnu.emacs.help:145398 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:41003 Archived-At: On 8 fev, 18:55, Marc Tfardy wrote: > weber wrote: > > > On 8 fev, 16:15, "weber" wrote: > >> hello again! > >> Quite frequently I paste stuff which is space-separated. > >> I would really like a function that would let me select a region and > >> keep only a column, deleting all the rest. > >> Anyone knows how I could implement something like this? > >> I can do it with regexps, but then I have to come up with a new one > >> every time... > >> TIA > >> HS > > > > I think the format of "stuff" can't be understood from above :) Here > > it is: > > > > variable BLABLA = 438438 > > variable LABLAC = 312 > > variable DAUSH = 43538 > > > > Apply to that region: keep-only-column 2 makes it: > > BLABLA > > LABLAC > > DAUSHD > > Here my draft. Probalby inefficient, but it does the job. > > (defun trim-rectangle (start end) > "Trims region to rectangle." > (interactive "r") > (save-excursion > (let ((offset 0) > (width 0) > (lines (count-lines start end)) > (i 0)) > (goto-char start) > (beginning-of-line) > (setq offset (- start (point))) > (goto-char end) > (beginning-of-line) > (forward-char offset) > (setq width (- end (point))) > (goto-char start) > (while (< i lines) > (beginning-of-line) > (delete-region (point) (+ (point) offset)) > (forward-char width) > (delete-region (point) (line-end-position)) > (end-of-line) > (forward-char) > (setq i (+ i 1)))))) > > HTH > > regards > > Marc Here's mine, but I guess we were thinking different things... Now I must apply it to a region (defun keep-column (&optional arg) "Considering space-separated columns, keep only column ARG." (interactive "p") (save-excursion (let ((cnt-col 0)) (while (not (eolp)) (if (looking-at "[ \t\r\n]") (progn (incf cnt-col) (delete-char 1) (while (and (not (eolp)) (looking-at "[ \t\n\r]")) (delete-char 1))) (progn (if (= cnt-col arg) (forward-char) (delete-char 1)))))))) Cheers weber