Function searchCols

javascript/0417-pacific-atlantic-water-flow.js:60–82

(heights, rows, cols, pacificReachable, atlanticReachable)

};

var searchCols = (heights, rows, cols, pacificReachable, atlanticReachable) => {
    for (let col = 0; col < cols; col++) {
        /* Time O(COLS) */
        const [pacificStart, atlanticStart] = [0, rows - 1];

        dfs(
            pacificStart,
            col,
            rows,
            cols,
            pacificReachable,
            heights,
        ); /* Space O(ROWS * COLS) */
        dfs(
            atlanticStart,
            col,
            rows,
            cols,
            atlanticReachable,
            heights,
        ); /* Space O(ROWS * COLS) */
    }
};

const dfs = (row, col, rows, cols, isReachable, heights) => {
    isReachable[row][col] = true;