From: Dave Bass <davebass@...>
Date: 2008-07-04T01:32:19+09:00
Subject: Re: pseudo-randomize an array in a consistent order

Max Williams wrote:
> Does anyone know how to pseudo-randomize an array (eg with a seed) so
> that you get the same order every time you do it?

If I've understood the problem correctly, can't you set up a lookup 
table for the array indices? You don't have to change the array itself.

The lookup table can be an array, e.g.

  t[0] = 1
  t[1] = 4
  t[2] = 2
  t[3] = 3
  t[4] = 0

Then if the original array is arr, instead of accessing arr[i] you'd 
access arr[t[i]].
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