module Hamster::EmptyList

def cached_size? 

def cached_size?
  true
end

def empty? 

def empty?
  true
end

def head

Returns:
  • (nil) - 
def head
  nil
end

def size

Returns:
  • (Integer) - 
def size
  0
end

def tail

Returns:
  • (self) - 
def tail
  self
end