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export default function gameOfLife(board: number[][]): void {    const dirs = [        [-1, -1],        [-1, 0],        [-1, 1],        [0, -1],        [0, 1],        [1, -1],        [1, 0],        [1, 1],    ];    const result = board.map((a, i) =>        a.map((v, j) => {            const all = dirs                .map(([r, c]) => board[i + r]?.[j + c])                .filter(Boolean) as number[];
            if (all.length < 2 || all.length > 3) return 0;            if (all.length === 3) return 1;            return v;        })    );
    result.forEach((a, i) => a.forEach((v, j) => (board[i][j] = v)));}