189. 轮转数组.js

/**
 * @param {number[]} nums
 * @param {number} k
 * @return {void} Do not return anything, modify nums in-place instead.
 */
 var rotate = function(nums, k) {
    const n = nums.length;
    const newArr = new Array(n);
    for (let i = 0; i < n; ++i) {
        newArr[(i + k) % n] = nums[i];
    }
    for (let i = 0; i < n; ++i) {
        nums[i] = newArr[i];
    }
};