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

// Problem on LeetCode: https://leetcode.com/problems/convert-binary-number-in-a-linked-list-to-integer/

/**
 * 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 current = head;
	let binary = '';

	while (current) {
		binary += current.val;
		current = current.next;
	}
	return parseInt(binary, 2);
};