InsertAfter inserts v into a new element immediately after location.

InsertBefore inserts v into a new element immediately before location.

NewList creates a new doubly linked list.

PushBack inserts v into a new element at the back of l.

PushFront inserts v into a new element at the front of l.

Hashmap provides an ordered O(1) mapping from keys to values.

Iterates over the keys and values in a LinkedHashmap from oldest to newest.

List implements a doubly linked list with a sentinel node.

ListElement is an element of a linked list.