From: "Brian Schröder" <ruby.brian@...>
Date: 2005-12-08T00:12:30+09:00
Subject: Re: Shuffling an array, sort_by{rand}'s bias (was Re: need some Ruby magic)

On 07/12/05, hmassa@gmail.com <hmassa@gmail.com> wrote:
> Why not
>  a.dup.sort { 2*rand(12345) <=> 12345 }
>
> ? that way, we'd have NO colisions ever.
>
>
>

What are you all trying to achieve by variations of
   rand <=> rand,

 why not simply use
  rand(3) - 1
?

which is not in danger of decreasing randomness by combining random numbers.

cheers,

Brian

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