From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: =?ISO-8859-1?Q?Nordl=F6w?= Newsgroups: gmane.emacs.help Subject: Re: Extract sublists Date: Tue, 17 Nov 2009 05:24:24 -0800 (PST) Organization: http://groups.google.com Message-ID: References: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1258466928 3355 80.91.229.12 (17 Nov 2009 14:08:48 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 17 Nov 2009 14:08:48 +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 Nov 17 15:08:41 2009 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 1NAOga-0008QU-F4 for geh-help-gnu-emacs@m.gmane.org; Tue, 17 Nov 2009 15:05:36 +0100 Original-Received: from localhost ([127.0.0.1]:59059 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NAOgU-0006xi-Se for geh-help-gnu-emacs@m.gmane.org; Tue, 17 Nov 2009 09:05:30 -0500 Original-Path: news.stanford.edu!usenet.stanford.edu!postnews.google.com!j19g2000yqk.googlegroups.com!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 26 Original-NNTP-Posting-Host: 150.227.15.253 Original-X-Trace: posting.google.com 1258464264 25683 127.0.0.1 (17 Nov 2009 13:24:24 GMT) Original-X-Complaints-To: groups-abuse@google.com Original-NNTP-Posting-Date: Tue, 17 Nov 2009 13:24:24 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: j19g2000yqk.googlegroups.com; posting-host=150.227.15.253; posting-account=ytJKAgoAAAA1tg4ScoRszebXiIldA5vg User-Agent: G2/1.0 X-HTTP-Via: 1.1 ip1-w.foi.se:8080 (IronPort-WSA/6.3.0-604) X-HTTP-UserAgent: Mozilla/5.0 (X11; U; Linux i686; en-US) AppleWebKit/532.5 (KHTML, like Gecko) Chrome/4.0.249.0 Safari/532.5,gzip(gfe),gzip(gfe) Original-Xref: news.stanford.edu gnu.emacs.help:174747 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:69820 Archived-At: On Nov 17, 2:22=A0pm, Nordl=F6w wrote: > Is there a function for extracting sublists of lists? > > If not here is my suggestion for inclusion in Emacs. > > (defun sublist (list from to) > =A0 "Return a sublist of LIST, from FROM to TO. > Counting starts at 0. Like `substring' but for lists." > =A0 (let (rtn (c from)) > =A0 =A0 (setq list (nthcdr from list)) > =A0 =A0 (while (and list (< c to)) > =A0 =A0 =A0 (push (pop list) rtn) > =A0 =A0 =A0 (setq c (1+ c))) > =A0 =A0 (nreverse rtn))) > ;; Use: (sublist '(a b) 0 0) > ;; Use: (sublist '(a b) 0 1) > ;; Use: (sublist '(a b) 1 2) > ;; Use: (sublist '(a b) 0 2) > > Thanks, > Nordl=F6w Modified from org-sublist() but with 0-begin-indexing analogously with substring. /Nordl=F6w