Split Camel Case in Ruby

WikiWords are really common and sometimes a pain for indexers and other user input devices... here is a little ruby script to split them apart.

def unCamel(str)
  if str.nil?
   return ""
  end
  str.gsub!(/([A-Z]+|[A-Z][a-z])/) {|x| ' ' + x }
  str.gsub!(/[A-Z][a-z]+/) {|x| ' ' + x }
  return str
end

unCamel("SettingUpRSSCrazy")
=> "  Setting Up  RSS Crazy"

unCamel("IReallyHATEWikiWords").split(' ')
=> ["I", "Really", "HATE", "Wiki", "Words"]