From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Teemu Likonen Newsgroups: gmane.emacs.devel Subject: Re: CL package serious deficiencies Date: Sun, 12 Feb 2012 17:53:15 +0200 Message-ID: <87bop4ujys.fsf@mithlond.arda> References: <33271707.post@talk.nabble.com> <87fwemcwlx.fsf@spindle.srvr.nix> <87d39pgdu4.fsf@gnus.org> <87mx8qy09w.fsf@mithlond.arda> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1329063659 5107 80.91.229.3 (12 Feb 2012 16:20:59 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Sun, 12 Feb 2012 16:20:59 +0000 (UTC) Cc: Helmut Eller , emacs-devel@gnu.org To: Stefan Monnier Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sun Feb 12 17:20:59 2012 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1RwcAc-0000qW-Bz for ged-emacs-devel@m.gmane.org; Sun, 12 Feb 2012 17:20:58 +0100 Original-Received: from localhost ([::1]:47169 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RwcAb-0007i1-PO for ged-emacs-devel@m.gmane.org; Sun, 12 Feb 2012 11:20:57 -0500 Original-Received: from eggs.gnu.org ([140.186.70.92]:53409) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Rwbjz-00023D-K3 for emacs-devel@gnu.org; Sun, 12 Feb 2012 10:53:28 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Rwbjy-00073n-GX for emacs-devel@gnu.org; Sun, 12 Feb 2012 10:53:27 -0500 Original-Received: from mta-out.inet.fi ([195.156.147.13]:36387 helo=jenni2.inet.fi) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Rwbjy-00073P-4t for emacs-devel@gnu.org; Sun, 12 Feb 2012 10:53:26 -0500 Original-Received: from mithlond.arda (84.251.132.215) by jenni2.inet.fi (8.5.140.02) id 4EB3AFE104F6BBAC; Sun, 12 Feb 2012 17:53:16 +0200 Original-Received: from dtw by mithlond.arda with local (Exim 4.72) (envelope-from ) id 1Rwbjn-000433-Hr; Sun, 12 Feb 2012 17:53:15 +0200 In-Reply-To: (Stefan Monnier's message of "Sat, 11 Feb 2012 23:41:07 -0500") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.93 (gnu/linux) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 195.156.147.13 X-Mailman-Approved-At: Sun, 12 Feb 2012 11:20:55 -0500 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:148503 Archived-At: * Stefan Monnier [2012-02-11 23:41:07 -0500] wrote: >>> As for :start :end :from-end and :count, I've never even seen them >>> used with delete-if. >> Here's one example: >> (defun delete-nth (n sequence) >> (delete-if (constantly t) sequence :start n :count 1)) > > Two problems: > 1- that can be implemented just as well with pop+nthcdr. NTHCDR is not an accessor so (pop (nthcdr n list)) doesn't work. Both POP and NTHCDR are for lists. DELETE-IF is for all sequences. Those keyword arguments are not useless. Some of them are rarely needed and that's why it's good that they are &key and not &optional. I think (replace-match "foo" :subexp 2) is much more readable than (replace-match "foo" nil nil nil 2)