Function spiralOrder

javascript/0054-spiral-matrix.js:9–64

(matrix, order = [])

 * @return {number[]}
 */
var spiralOrder = function (matrix, order = []) {
    const [rows, cols] = [matrix.length - 1, matrix[0].length - 1];
    let [top, bot, left, right] = [0, rows, 0, cols];

    const isInBounds = () => left <= right && top <= bot;
    while (isInBounds()) {
        /* Time O(ROWS * COLS) */
        addTop(
            matrix,
            top,
            bot,
            left,
            right,
            order,
        ); /* Time O(COLS)        | Ignore Auxilary Spsace O(ROWS * COLS) */
        top++;

        addRight(
            matrix,
            top,
            bot,
            left,
            right,
            order,
        ); /* Time O(ROWS)        | Ignore Auxilary Spsace O(ROWS * COLS) */
        right--;

        const hasRow = top <= bot;
        if (hasRow) {
            addBot(
                matrix,
                top,
                bot,
                left,
                right,
                order,
            ); /* Time O(COLS)         | Ignore Auxilary Spsace O(ROWS * COLS) */
            bot--;
        }

        const hasCol = left <= right;
        if (hasCol) {
            addLeft(
                matrix,
                top,
                bot,
                left,
                right,
                order,
            ); /* Time O(ROWS)        | Ignore Auxilary Spsace O(ROWS * COLS) */
            left++;
        }
    }

    return order;
};

var addTop = (matrix, top, bot, left, right, order) => {