From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Tyler Smith Newsgroups: gmane.emacs.help Subject: Re: random predicate function Date: Mon, 13 Dec 2010 11:08:29 -0500 Message-ID: <87ei9lveo2.fsf@guruji.demimonde> References: <87ipyxvils.fsf@guruji.demimonde> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: dough.gmane.org 1292256575 8990 80.91.229.12 (13 Dec 2010 16:09:35 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Mon, 13 Dec 2010 16:09:35 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Dec 13 17:09:29 2010 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 4.69) (envelope-from ) id 1PSAxs-000765-OK for geh-help-gnu-emacs@m.gmane.org; Mon, 13 Dec 2010 17:09:28 +0100 Original-Received: from localhost ([127.0.0.1]:40012 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PSAxs-0000SQ-6w for geh-help-gnu-emacs@m.gmane.org; Mon, 13 Dec 2010 11:09:28 -0500 Original-Received: from [140.186.70.92] (port=55673 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PSAxI-0000Rd-SO for help-gnu-emacs@gnu.org; Mon, 13 Dec 2010 11:08:53 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PSAxH-0006o0-Lt for help-gnu-emacs@gnu.org; Mon, 13 Dec 2010 11:08:52 -0500 Original-Received: from lo.gmane.org ([80.91.229.12]:48444) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PSAxH-0006na-Dz for help-gnu-emacs@gnu.org; Mon, 13 Dec 2010 11:08:51 -0500 Original-Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1PSAxE-0006ls-M0 for help-gnu-emacs@gnu.org; Mon, 13 Dec 2010 17:08:48 +0100 Original-Received: from 157.89.133.51 ([157.89.133.51]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 13 Dec 2010 17:08:48 +0100 Original-Received: from tyler.smith by 157.89.133.51 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 13 Dec 2010 17:08:48 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 21 Original-X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: 157.89.133.51 User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux) Cancel-Lock: sha1:52iQS9qy59sR91nlE8g6BJ5yjF8= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) 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:77446 Archived-At: Gary writes: > Tyler Smith wrote: > >> (lambda (tmp1 tmp2) (if (eq (mod (random) 2) 0) >> t >> nil)))))) > > I'm by no means an expert, but you should perhaps first once call > (random t) > Have a look at > http://www.gnu.org/software/emacs/elisp/html_node/Random-Numbers.html Thanks, Gary. I found that after I sent the first message. I've added in a call to (random t). I still get some 'non-random' looking sorts. It's hard to be sure, I'll have to run some sort of systematic check to see if the results are consistent over large numbers of calls. Cheers, Tyler