c# - 如何在 C# 中打乱二维数组的行

Question

例如，我有二维数组:

int[,] array = new int[3,3] {{1,2,3}, {4,5,6} {7,8,9}}

1 2 3
4 5 6
7 8 9

我想像这样打乱行的顺序

4 5 6
7 8 9
1 2 3

Answer 1

您可以使用 Fisher-Yates shuffle 来交换数组的“行”。我用过this answer对于一维数组并将其转换为与二维数组一起使用:

public static void Shuffle(Random random, int[,] arr)
{
    int height = arr.GetUpperBound(0) + 1;
    int width = arr.GetUpperBound(1) + 1;

    for (int i = 0; i < height; ++i)
    {
        int randomRow = random.Next(i, height);
        for (int j = 0; j < width; ++j)
        {
            int tmp = arr[i, j];
            arr[i, j] = arr[randomRow, j];
            arr[randomRow, j] = tmp;
        }

    }
}

Try it online