From: Stephen Waits <steve@...>
Date: 2005-12-08T01:28:53+09:00
Subject: Re: Shuffling an array, sort_by{rand}'s bias (was Re: need some Ruby magic)


On Dec 7, 2005, at 6:57 AM, hmassa@gmail.com wrote:

> Why not
>  a.dup.sort { 2*rand(12345) <=> 12345 }

Because it's the slowest version I've tested.  See the rest of the  
thread for my benchmarks.  In order of speed, we have 'shuffle3',  
'sort_by {rand}', and 'shuffle4'.

--Steve