Update 189-rotate-array.js

Author: everthis

189-rotate-array.js

@@ -4,5 +4,15 @@
  * @return {void} Do not return anything, modify nums in-place instead.
  */
 const rotate = function(nums, k) {
-  nums.unshift(...nums.splice(nums.length - k));
+  nums.unshift(...nums.splice(nums.length - k))
+};
+
+// another
+
+const rotate = function(nums, k) {
+  let i = k
+  while (i > 0) {
+    nums.unshift(nums.pop())
+    i--
+  }
 };