Function checkNeighbor

javascript/0417-pacific-atlantic-water-flow.js:216–227

(heights, row, rows, col, cols, isReachable, queue)

        .map(() => new Array(cols).fill(false));

var checkNeighbor = (heights, row, rows, col, cols, isReachable, queue) => {
    isReachable[row][col] = true;

    for (const [_row, _col] of getNeighbors(row, rows, col, cols)) {
        if (isReachable[_row][_col]) continue;

        const isLower = heights[_row][_col] < heights[row][col];
        if (isLower) continue;

        queue.enqueue([_row, _col]);
    }
};

var getNeighbors = (row, rows, col, cols) =>
    [