From mboxrd@z Thu Jan 1 00:00:00 1970 Path: main.gmane.org!not-for-mail From: Kevin Ryde Newsgroups: gmane.lisp.guile.devel Subject: Re: srfi-1 take and drop Date: Tue, 06 May 2003 11:58:54 +1000 Sender: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Message-ID: <873cjsltsx.fsf@zip.com.au> References: <87y91lt29u.fsf@zip.com.au> <8765oozwta.fsf@raven.i.defaultvalue.org> NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: main.gmane.org 1052187465 5837 80.91.224.249 (6 May 2003 02:17:45 GMT) X-Complaints-To: usenet@main.gmane.org NNTP-Posting-Date: Tue, 6 May 2003 02:17:45 +0000 (UTC) Original-X-From: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Tue May 06 04:17:43 2003 Return-path: Original-Received: from monty-python.gnu.org ([199.232.76.173]) by main.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 19Cs1X-0001W0-00 for ; Tue, 06 May 2003 04:17:43 +0200 Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.10.13) id 19Cs2P-0003Py-03 for guile-devel@m.gmane.org; Mon, 05 May 2003 22:18:37 -0400 Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.10.13) id 19Cs24-0003IZ-00 for guile-devel@gnu.org; Mon, 05 May 2003 22:18:16 -0400 Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.10.13) id 19Cs22-0003HA-00 for guile-devel@gnu.org; Mon, 05 May 2003 22:18:15 -0400 Original-Received: from snoopy.pacific.net.au ([61.8.0.36]) by monty-python.gnu.org with esmtp (Exim 4.10.13) id 19Cs1N-0002Xn-00 for guile-devel@gnu.org; Mon, 05 May 2003 22:17:33 -0400 Original-Received: from sunny.pacific.net.au (sunny.pacific.net.au [203.2.228.40]) h462HBLo007123 for ; Tue, 6 May 2003 12:17:31 +1000 Original-Received: from wisma.pacific.net.au (wisma.pacific.net.au [210.23.129.72]) by sunny.pacific.net.au with ESMTP id h461x6Qg022477 for ; Tue, 6 May 2003 11:59:06 +1000 (EST) Original-Received: from localhost (ppp20.dyn228.pacific.net.au [203.143.228.20]) by wisma.pacific.net.au (8.12.9/8.12.9) with ESMTP id h461x2YZ003519 for ; Tue, 6 May 2003 11:59:03 +1000 (EST) Original-Received: from gg by localhost with local (Exim 3.35 #1 (Debian)) id 19CrjM-0000Qs-00; Tue, 06 May 2003 11:58:56 +1000 Original-To: guile-devel@gnu.org In-Reply-To: <8765oozwta.fsf@raven.i.defaultvalue.org> (Rob Browning's message of "Mon, 05 May 2003 20:30:09 -0500") User-Agent: Gnus/5.090019 (Oort Gnus v0.19) Emacs/21.2 (gnu/linux) X-BeenThere: guile-devel@gnu.org X-Mailman-Version: 2.1b5 Precedence: list List-Id: Developers list for Guile, the GNU extensibility library List-Help: List-Post: List-Subscribe: , List-Archive: List-Unsubscribe: , Errors-To: guile-devel-bounces+guile-devel=m.gmane.org@gnu.org Xref: main.gmane.org gmane.lisp.guile.devel:2278 X-Report-Spam: http://spam.gmane.org/gmane.lisp.guile.devel:2278 Rob Browning writes: > > I was planning on doing a little hacking on srfi-1.scm too, I arrived in srfi-1 because I managed to hit a stack overflow in delete-duplicates on just a few hundred elements, then got to looking around at what was there. I've written some non-tail-recursive C versions of delete and delete!, and I've got a bit towards delete-duplicates, delete-duplicates! and alist-copy. I guess a lot of stuff could be coded in C, but start at least with things that will show a definite benefit. > One thing I was planning to do was alter null-list? to be less > careful. The spec doesn't require it, and what we do now is more > expensive. Does the spec say it has to chase down to check it's not an improper list? I guess at least that can be done in one loop and not separate proper-list? and circular-list? calls. _______________________________________________ Guile-devel mailing list Guile-devel@gnu.org http://mail.gnu.org/mailman/listinfo/guile-devel