Class: List

Inherits:
Object
  • Object
show all
Includes:
Comparable, Enumerable
Defined in:
lib/prct06/prct06.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(inicio = nil) ⇒ List

Returns a new instance of List.



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# File 'lib/prct06/prct06.rb', line 9

def initialize(inicio=nil)
	@cola = @cabeza = Node.new(inicio) if inicio
end

Instance Attribute Details

#cabeza ⇒ Object

Returns the value of attribute cabeza.



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# File 'lib/prct06/prct06.rb', line 7

def cabeza
  @cabeza
end

#cola ⇒ Object

Returns the value of attribute cola.



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# File 'lib/prct06/prct06.rb', line 8

def cola
  @cola
end

Instance Method Details

#add(value) ⇒ Object 



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# File 'lib/prct06/prct06.rb', line 13

def add(value)
	node = Node.new(value)
	node.next = @cabeza
	@cabeza.before = node

	@cabeza = node
end

#add_from_tail(value) ⇒ Object 



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# File 'lib/prct06/prct06.rb', line 21

def add_from_tail(value)
	node = Node.new(value)
	node.before = @cola
	@cola.next = node
	
	@cola = node
end

#each ⇒ Object 



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# File 'lib/prct06/prct06.rb', line 43

def each
	aux = @cabeza
	while aux != nil do
		yield aux.value
		aux = aux.next
	end
end

#remove ⇒ Object 



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# File 'lib/prct06/prct06.rb', line 29

def remove
	@cabeza = @cabeza.next
end

#remove_from_tail ⇒ Object 



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# File 'lib/prct06/prct06.rb', line 33

def remove_from_tail
	@cola = @cola.before
	@cola.next = nil
end

#to_s ⇒ Object 



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# File 'lib/prct06/prct06.rb', line 37

def to_s
	while @cabeza != nil do
		puts @cabeza.value
		remove()
	end
end