HackerRank Delete a Node from a Linked List | JS Solution

Problem

HackerRank detailed problem description can be found here.

Inputs & Outputs

/*
param {Node} head
param {number} position
return {Node} head
*/

Test Case

JavaScript Solution

function deleteNode(head, position) {
  if (!head) {
    return null;
  }

  let nodeToDelete = head;

  if (position === 0) {
    head = nodeToDelete.next;
    return head;
  }

  let count = 0;
  let prev = null;

  while (nodeToDelete) {
    if (count === position) {
      console.log(count);
      prev.next = nodeToDelete.next;
      return head;
    }
    prev = nodeToDelete;
    nodeToDelete = nodeToDelete.next;
    count++;
  }
  return null;
}

Algorithm Source

Delete a Node Algorithm by HackerRank