Split into random slices from an array in Ruby

split_random.rb

class Array
  def split_random(n)
    def td(n)
      [take(n),drop(n)]
    end
    
    def split_random_acc(n,l, acc)
      head,tail = l.td(rand(n)+1)
      return (acc + [head]) if tail==[]
      split_random_acc(n, tail, acc + [head])
    end

    split_random_acc(n,self,[]) 
  end
end