gistfile1.builder

Array.send :define_method, :swap do |a,b|
  temp = deck[a]
  self[a] = self[b]
  self[b] = temp
end

Array.send :define_method, :shuffle do |i|
    length = self.length
    0.upto(length-1) do 
      swapKeys = [i,rand(length)]
      self.swap(swapKeys[0],swapKeys[1])
    end
 end

made it a Knuth Shuffle.