From: Chris Lowis <chris.lowis@...>
Date: 2009-01-22T20:59:11+09:00
Subject: Re: Separate random number generators?

Bart Braem wrote:
> On Jan 22, 12:13�pm, Lars Christensen <lar...@belunktum.dk> wrote:
>>
>> http://www.splatbang.com/rubyquiz/quiz.rhtml?id=173_Not_So_Random
> 
> I indeed mean separate deterministic PRNGs with fixed seeds for
> reproducible sequences. Interesting to see this was a Ruby Quiz! Are
> there solutions without the use of DRb and other libraries?
> 
> Thanks for your fast reply!

I know this doesn't meet your criteria of independence from other 
libraries, but the GSL (GNU Scientific Library) has a number (of 
different algorithms for seeded random number generation. It's fairly 
easy to call these functions from Ruby using the rb-gsl 
(http://rb-gsl.rubyforge.org/) bindings. Here's some examples:
http://rb-gsl.rubyforge.org/rng.html

I've also written a bit about that in the past on my blog 
(http://blog.chrislowis.co.uk).

Hope this helps,

Chris
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