Create: 876-Middle-Of-The-Linked-List.js

imevanc · imevanc · commit f6e9d17a3fbd · 2022-11-04T13:04:11.000Z
diff --git a/javascript/876-Middle-Of-The-Linked-List.js b/javascript/876-Middle-Of-The-Linked-List.js
@@ -0,0 +1,21 @@
+/**
+ * https://leetcode.com/problems/middle-of-the-linked-list/
+ * 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 middleNode = function (head) {
+    let first = head;
+    let second = head;
+    while (second != null && second.next != null) {
+        first = first.next;
+        second = second.next.next;
+    }
+    return first;
+};
