Create 1290-convert-binary-number-in-a-linked-list-to-integer.js

Author: everthis

1290-convert-binary-number-in-a-linked-list-to-integer.js

@@ -0,0 +1,20 @@
+/**
+ * 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 {number}
+ */
+const getDecimalValue = function(head) {
+  let res = 0
+
+  while(head) {
+    res = res * 2 + head.val
+    head = head.next
+  }
+  return res
+};