shuffle.rb

def shuffle(l)
  return l[0] if l.size == 1
  i = l.index(l.sample)
  h = l[i]
  l.delete_at(i)
  return [h, shuffle(l)].flatten
end

array = [1,2,3,4,5,6]
p shuffle(array)

TODO:

• line5: use l[(0...i)] + l[i...l.size-1]