Time: 87 ms (15.97%), Space: 43.8 MB (63.94%) - LeetHub

Author: dev-ahmedhany

0206-reverse-linked-list/0206-reverse-linked-list.js

@@ -0,0 +1,18 @@
+/**
+ * Definition for singly-linked list.
+ * function ListNode(val, next) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.next = (next===undefined ? null : next)
+ * }
+ */
+/**
+ * @param {ListNode} head
+ * @return {ListNode}
+ */
+var reverseList = function(head) {
+    let [prev, current] = [null, head]
+    while(current) {
+        [current.next, prev, current] = [prev, current, current.next]
+    }
+    return prev
+};