Function getNeighbors

javascript/0200-number-of-islands.js:35–46

(row, rows, col, cols)

};

var getNeighbors = (row, rows, col, cols) =>
    [
        [0, 1],
        [0, -1],
        [1, 0],
        [-1, 0],
    ]
        .map(([_row, _col]) => [row + _row, col + _col])
        .filter(
            ([_row, _col]) =>
                0 <= _row && _row < rows && 0 <= _col && _col < cols,
        );

/**
 * https://leetcode.com/problems/number-of-islands/