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Author: 공예영

공예영/2주차/0206-reverse-linked-list/0206-reverse-linked-list.js

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+/**
+ * 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 current = head;
+        let prev = null;
+
+        while(current){
+            const next = current.next;
+            current.next = prev;
+            prev = current;
+            current = next;
+        }
+        return prev;
+};