123456789_123456789_123456789_123456789_123456789_

Class: Rake::LinkedList::EmptyLinkedList

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
InvocationChain::EmptyInvocationChain
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, LinkedList
Instance Chain:
self, LinkedList
Inherits: LinkedList
  • Object
Defined in: lib/rake/linked_list.rb

Overview

Represent an empty list, using the Null Object Pattern.

When inheriting from the ::Rake::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).

Class Method Summary

Instance Attribute Summary

Constructor Details

.new ⇒ EmptyLinkedList

[ GitHub ] 

  


# File 'lib/rake/linked_list.rb', line 98



def initialize
end


  







Class Method Details



  

    .cons(head, tail)  
  

  [ GitHub ]


  

  


# File 'lib/rake/linked_list.rb', line 105



def self.cons(head, tail)
  @parent.cons(head, tail)
end


  







Instance Attribute Details



  

    #empty?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'lib/rake/linked_list.rb', line 101



def empty?
  true
end