Function rotate

javascript/0048-rotate-image.js:7–10

(matrix)

 * @return {void} Do not return anything, modify matrix in-place instead.
 */
var rotate = (matrix) => {
    transpose(matrix); /* Time O(ROWS * COLS) */
    reflect(matrix); /* Time O(ROWS * COLS) */
};

var transpose = (matrix) => {
    const rows = matrix.length;