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: Element-Relative Sequence Insertion Date: Thu, 11 Jun 2009 05:51:46 -0700 (PDT) Organization: http://groups.google.com Message-ID: <5f86d760-77b2-4ac0-897b-4eb8deca43fe@a36g2000yqc.googlegroups.com> References: <7czlcf0wu9.fsf@pbourguignon.anevia.com> 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 1244727894 22097 80.91.229.12 (11 Jun 2009 13:44:54 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 11 Jun 2009 13:44:54 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Thu Jun 11 15:44:51 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 1MEkaE-0007aQ-Te for geh-help-gnu-emacs@m.gmane.org; Thu, 11 Jun 2009 15:44:47 +0200 Original-Received: from localhost ([127.0.0.1]:38185 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MEkaE-0005T3-4Y for geh-help-gnu-emacs@m.gmane.org; Thu, 11 Jun 2009 09:44:46 -0400 Original-Path: news.stanford.edu!newsfeed.stanford.edu!postnews.google.com!a36g2000yqc.googlegroups.com!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 45 Original-NNTP-Posting-Host: 150.227.15.253 Original-X-Trace: posting.google.com 1244724706 12711 127.0.0.1 (11 Jun 2009 12:51:46 GMT) Original-X-Complaints-To: groups-abuse@google.com Original-NNTP-Posting-Date: Thu, 11 Jun 2009 12:51:46 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: a36g2000yqc.googlegroups.com; posting-host=150.227.15.253; posting-account=ytJKAgoAAAA1tg4ScoRszebXiIldA5vg User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (X11; U; Linux i686; sv-SE; rv:1.9.0.10) Gecko/2009042523 Ubuntu/9.04 (jaunty) Firefox/3.0.10, gzip(gfe), gzip(gfe) X-HTTP-Via: 1.1 ip1-w.foi.se:8080 (IronPort-WSA/5.6.4-015) Original-Xref: news.stanford.edu gnu.emacs.help:169938 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:65169 Archived-At: On 11 Juni, 14:38, p...@informatimago.com (Pascal J. Bourguignon) wrote: > Nordl=F6w writes: > > How do I insert an element (object) relative to another in a sequence > > (or list in my case)? Example: > > > (insert-after 'X '(a b c) 'b) =A0=3D> '(a b X c) > > (insert-before 'X '(a b c) b) =A0=3D> '(a X b c) > > This is not what you want. =A0You don't what these function to return a > 2-element lists, the first of which is the symbol quote. =A0Unless > you're doing meta-programming you never want to have such a result. > > You wan this: > > =A0 =A0(insert-after 'X '(a b c) =A0'b) =A0--> =A0(a b X c) > =A0 =A0(insert-before 'X '(a b c) 'b) =A0--> =A0(a X b c) > > Also, you may want to mention whether your insert-after and > insert-before function are destructive or non-destructive. =A0Since you > show as only specification examples using literal data, we will assume > you want them to be non-destructive. > > So you do that, just by doing it. =A0There's nothing simplier. > > (qrsha vafreg-nsgre (arj yvfg byq) > =A0 =A0(pbaq ((ahyy yvfg) '()) > =A0 =A0 =A0 =A0 =A0((rdy byq (pne yvfg)) =A0(pbaf (pne yvfg) (pbaf arj (p= qe yvfg)))) > =A0 =A0 =A0 =A0 =A0(g (pbaf (pne yvfg) (vafreg-nsgre arj (pqe yvfg) byq))= ))) > > (qrsha vafreg-orsber (arj yvfg byq) > =A0 =A0(pbaq ((ahyy yvfg) '()) > =A0 =A0 =A0 =A0 =A0((rdy byq (pne yvfg)) =A0(pbaf arj yvfg)) > =A0 =A0 =A0 =A0 =A0(g (pbaf (pne yvfg) (vafreg-orsber arj (pqe yvfg) byq)= )))) > > -- > __Pascal Bourguignon__ But how do I implement insert-after() and insert-before()? I guess the code in the end doesn't do anything meaningful :) /Nordl=F6w