(Algorithms in Javascript) Leetcode 206. Reverse Linked List - Reverse a singly linked list.

leetcode-206-reverse-a-linked-list.js

const reverseList = function(head) {
	let previousNode = null;
	let currentNode = head;
	let nextNode = null;

	while(currentNode) {
			//reverse the pointers
			nextNode = currentNode.next;
			currentNode.next = previousNode;

			//move list forward
			previousNode = currentNode;
			currentNode = nextNode;   
	}
	return previousNode;
};