From: Florian Frank <flori@...>
Date: 2007-01-03T06:02:55+09:00
Subject: Re: Randomizing an Array?

Ilan Berci wrote:
> jwcooper wrote:
>   
>> I'm trying to randomize an array, and this is what I have:
>>     
[...]
> ilans-Mac:~ ilan$ irb
> irb(main):001:0> (1..10).to_a.sort {rand}
> => [10, 6, 1, 7, 3, 8, 5, 9, 4, 2]
> irb(main):002:0>
>   
Don't do this, better use (1..10).sort_by { rand }. Your version is 
equivalent to (1..10).sort { 1 } and *always* creates the same 
permutation for this array.

-- 
Florian Frank