title	type	duration	creator
Reverse a Linked List	Homework	1:00	name city Charlie Drews NYC

Reverse a Linked List Homework

Note: This can be a pair programming activity or done independently.

Exercise

You are going to write a method to reverse a linked list. For example, say you have a linked list with 10 nodes:

[Node 0] -> [Node 1] -> ... -> [Node 8] -> [Node 9] -> null

The head is [Node 0]. The last node points to null, because there is no next node after the last one. If you reverse this linked list, the result would be:

[Node 9] -> [Node 8] -> ... -> [Node 1] -> [Node 0] -> null

The new head, after reversing the list, is [Node 9], and now the old head, [Node 0], points to null because it is now the last node.

You can use the linked list you created for the Linked List Lab as your starting point, so that can be the linked list you reverse.

Requirements

Write a method that takes the head of a linked list as input (e.g. [Node 0] in the example above) and reverses the list by iterating through each node and modifying them as needed. The method should reverse the list in place, meaning you will modify the list directly without making a whole new copy of the list.

Your method does not need to return anything, but by the end the head input should be updated to refer to the new head of the list after it has been reversed.

Bonus:

• In addition to the required iterative approach, implement another method that reverses the linked list recursively.
• Create your own implementation of ArrayList
  • Note that the process of inserting a node in an ArrayList is much more complicated than in a Linked List!
  • If you don't want to complete this bonus, at least think about why insertion is more complicated for ArrayList - what's different and why? What advantages do you get with ArrayList that make it worth this extra effort?

Starter code

You can copy your code from the Linked List Lab into your fork of this repo and use that as starter code. Or, you can start from scratch and re-implement a linked list as more practice.

Deliverable

Submit your code via pull request from your fork of this repo. Do not submit this assignment to the Linked List Lab repo. If you worked with a partner, only one person needs to submit a pull request, but be sure to include both names in the pull request title.

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