Class | Rake::LinkedList::EmptyLinkedList |
In: |
lib/rake/linked_list.rb
|
Parent: | LinkedList |
Represent an empty list, using the Null Object Pattern.
When inheriting from the LinkedList class, you should implement a type specific Empty class as well. Make sure you set the class instance variable @parent to the associated list class (this allows conj, cons and make to work polymorphically).