From: "Aleksi Niemelä" <aleksi.niemela@...>
Date: 2000-07-03T12:13:41+02:00
Subject: [ruby-talk:03758] Array.uniq! returning nil

Why Array.uniq! returns nil if it doesn't do anything (every element 
is unique). Same for Array.compact! Next example requires two times 
the memory what uniq! -version would. Could be a problem with large texts.

  uniqChars = text.split(//).uniq

I know it could be coded better using hashes but this is just an example.

	- Aleksi