From: Gary Wright <wright_gary_r@...>
Date: 2007-04-30T11:45:24+09:00
Subject: Re: sorting by rand?


On Apr 29, 2007, at 10:28 PM, Peter Seebach wrote:

> l = a.length
> a.each_index { |x| a[x] = a[rand(l)] }

You are trashing your original array.

irb(main):001:0> a = [1,2,3,4]
=> [1, 2, 3, 4]
irb(main):002:0> l = a.length
=> 4
irb(main):003:0> a.each_index { |x| a[x] = a[rand(l)] }
=> [3, 3, 3, 4]