An indexed queue where items are indexed beginning from the most recently enqueued item.
Enqueuing an item pushes all existing indexes up by one and inserts the item at index 0.
Dequeuing an item removes the item from the highest index and returns it.
An indexed queue where items are indexed beginning from the most recently enqueued item. Enqueuing an item pushes all existing indexes up by one and inserts the item at index 0. Dequeuing an item removes the item from the highest index and returns it.