Delete Node From End

Removing the Nth Node From a Linked List's End: A Single-Pass Approach

Get ready to sail through a classic problem: Removing the nth node from the end of a linked list in a single pass. By the end of this lesson, you'll be able to wave goodbye to that pesky nth node and still maintain the list's structure.

The Task

Imagine a chain of dominoes, each representing a node in our linked list. In this scenario, a list might look like this:

1 -> 2 -> 3 -> 4 -> 5

Your mission is to remove the nth domino from the end. So, if we call removeFromEnd(head, 2), the chain would lose the 4 domino, and the head would still be 1.

Ground Rules

Before you jump in, let's set some ground rules:

• Empty List Handling: The linked list could be empty, akin to a chain with no dominoes.
• Nth Node Edge Case: If n exceeds the length of the list, then the chain remains intact. No dominoes are toppled!
• Efficiency Requirements: Aim for a time complexity of O(n) and a space complexity of O(1).

```js
function removeFromEnd(head, idxFromEnd) {
  // remove idxFromEnd-th node
  return head;
};
```