rotateMatrix question
JavaScript
/**
* This function should rotate matrix
*
* @param {Array<number>} arr - the an array of numbers
* @return {Array<number>} - should return an array of numbers
* @example
* rotateMatrix([
* [1, 2],
* [3, 4]
* ]);
* [
* [1, 3]
* [2, 4]
* ]
*/
const rotateMatrix = arr => {
// logic...
};