feat: merge two sorted lists

Author: soobing

merge-two-sorted-lists/soobing3.ts

@@ -0,0 +1,30 @@
+
+class ListNode {
+    val: number
+    next: ListNode | null
+    constructor(val?: number, next?: ListNode | null) {
+        this.val = (val===undefined ? 0 : val)
+        this.next = (next===undefined ? null : next)
+    }
+}
+ 
+
+function mergeTwoLists(list1: ListNode | null, list2: ListNode | null): ListNode | null {
+  let mergedList = new ListNode(0, null);
+  const result = mergedList;
+
+  while(list1 && list2) {
+      if(list1.val < list2.val) {
+          mergedList.next = list1;
+          list1 = list1.next;
+      } else {
+          mergedList.next = list2;
+          list2 = list2.next;
+      }
+      mergedList = mergedList.next;
+  }
+
+  mergedList.next = list1 ?? list2;
+  
+  return result.next;
+};