206

Author: LeuisKen

206.js

@@ -0,0 +1,22 @@
+/**
+ * Definition for singly-linked list.
+ * function ListNode(val) {
+ *     this.val = val;
+ *     this.next = null;
+ * }
+ */
+/**
+ * @param {ListNode} head
+ * @return {ListNode}
+ */
+var reverseList = function(head) {
+	var prev = null,
+		next = null;
+	while(head !== null){
+		next = head.next;
+		head.next = prev;
+		prev = head;
+		head = next;
+	}
+	return prev;
+};