From: Lionel Bouton <lionel-subscription@...>
Date: 2007-08-27T06:58:41+09:00
Subject: Re: sort_by { rand } not working

Dan Zwell wrote:
>
>     for i in 0...@all.length
>         j = i+rand(@all.length-i)
>         @all[i], @all[j] = @all[j], @all[i]
>     end
>
> The second one will be faster, but you probably shouldn't care on
> small arrays.
>

You could even optimize this further with 0...@all.length-1 instead of
0...@all.length (the last loop is a noop), but I agree, this is too much
pain for the eyes to bother unless it becomes a real performance problem.

Sorry if this has already been said, in fact I didn't even remember this
code on the mailing-list at all (too much traffic for me maybe).

Lionel