def calc_holes_array(self, board, heights):
    holes_list = []
    for col_num in range(self.width):
        col_value = 0
        for row_num in range(self.height - 1, self.height - 1 - heights[col_num], -1):
            col_value += 0 if board[row_num][col_num] == 1 else 1
        holes_list.append(col_value)
    return holes_list