create_2D_array.rb

def create2DArray(lengths)
    array = Array.new(lengths.length) {Array.new}
    x = 0

    while (x < lengths.length)
          y = 0
          z = 0

          while (y < lengths[x])
                array[x][z] = y
                y = y + 1
                z = z + 1
          end

          x = x + 1
    end

    return array
end