Update 2130-maximum-twin-sum-of-a-linked-list.js

Modularizing the code.

javascript/2130-maximum-twin-sum-of-a-linked-list.js

@@ -14,28 +14,30 @@
  */
 var pairSum = function (head) {
  const mid = llLength(head) / 2;
-
- // get the right starting pointer
- let count = 0;
- let rightPointer = head;
- while (count < mid) {
- rightPointer = rightPointer.next;
- count++;
- }
-
- // reverse the left portion of the array
- leftPointer = reverseLL(head, mid);
-
- let max = 0;
- while (leftPointer && rightPointer) {
- max = Math.max(leftPointer.val + rightPointer.val, max);
- leftPointer = leftPointer.next;
- rightPointer = rightPointer.next;
- }
-
- return max;
+ const rightPointer = getRightPointer(head, mid);
+ const leftPointer = reverseLL(head, mid);
+
+ return getMax(leftPointer, rightPointer);
 };
 
+var getMax = (leftPointer, rightPointer) => {
+ let max = 0;
+ while (leftPointer && rightPointer) {
+ max = Math.max(leftPointer.val + rightPointer.val, max);
+ leftPointer = leftPointer.next;
+ rightPointer = rightPointer.next;
+ }
+ return max;
+}
+var getRightPointer = (head, mid) => {
+ let count = 0;
+ let rightPointer = head;
+ while (count < mid) {
+ rightPointer = rightPointer.next;
+ count++;
+ }
+ return rightPointer;
+}
 
 var llLength = (head) => {
  let count = 0;