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

Author: chetannada

javascript/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}
+ */
+var getDecimalValue = function (head) {
+    let value = 0; // initialize value to zero
+    while (head) { // while loop will run till head becomes null
+        value = (value << 1) | head.val; // used left shift operator (<<) and bitwise OR (|) operator returns a number from binary
+        head = head.next; // next value of head
+    }
+
+    return value; // return the value
+};