From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Erik Iverson Newsgroups: gmane.emacs.help Subject: Re: random predicate function Date: Mon, 13 Dec 2010 10:16:31 -0600 Message-ID: <4D0646DF.4060807@ccbr.umn.edu> References: <87ipyxvils.fsf@guruji.demimonde> <87ei9lveo2.fsf@guruji.demimonde> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: dough.gmane.org 1292257154 12155 80.91.229.12 (13 Dec 2010 16:19:14 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Mon, 13 Dec 2010 16:19:14 +0000 (UTC) Cc: help-gnu-emacs@gnu.org To: Tyler Smith Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Dec 13 17:19:09 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 1PSB7E-00042J-RO for geh-help-gnu-emacs@m.gmane.org; Mon, 13 Dec 2010 17:19:09 +0100 Original-Received: from localhost ([127.0.0.1]:56240 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PSB7E-0006Zv-6n for geh-help-gnu-emacs@m.gmane.org; Mon, 13 Dec 2010 11:19:08 -0500 Original-Received: from [140.186.70.92] (port=53340 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PSB4n-0005Hf-Dw for help-gnu-emacs@gnu.org; Mon, 13 Dec 2010 11:16:38 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PSB4m-000132-65 for help-gnu-emacs@gnu.org; Mon, 13 Dec 2010 11:16:37 -0500 Original-Received: from walleye.ccbr.umn.edu ([128.101.116.11]:1418) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PSB4m-00012b-1D for help-gnu-emacs@gnu.org; Mon, 13 Dec 2010 11:16:36 -0500 Original-Received: from tadpole.ccbr.umn.edu (tadpole.ccbr.umn.edu [128.101.116.26]) by walleye.ccbr.umn.edu (8.9.3p2/8.9.3) with ESMTP id KAA20052; Mon, 13 Dec 2010 10:16:34 -0600 (CST) Original-Received: from iron.ccbr.umn.edu (iron.ccbr.umn.edu [128.101.116.194]) by tadpole.ccbr.umn.edu (8.9.3/8.9.3) with ESMTP id KAA07388; Mon, 13 Dec 2010 10:16:32 -0600 (CST) User-Agent: Thunderbird 2.0.0.23 (X11/20090812) In-Reply-To: <87ei9lveo2.fsf@guruji.demimonde> X-detected-operating-system: by eggs.gnu.org: NMAP syn scan (4) 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:77447 Archived-At: Obligatory Dilbert: http://www.random.org/analysis/dilbert.jpg Tyler Smith wrote: > 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 > >