Class: LList

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/Dieta/LList.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(perry) ⇒ LList

Returns a new instance of LList.



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# File 'lib/Dieta/LList.rb', line 8

def initialize(perry)
   a=Node.new(perry,nil,nil)
   @head=a
   @tail=a
end

Instance Attribute Details

#head ⇒ Object

Returns the value of attribute head.



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# File 'lib/Dieta/LList.rb', line 5

def head
  @head
end

#tail ⇒ Object

Returns the value of attribute tail.



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# File 'lib/Dieta/LList.rb', line 5

def tail
  @tail
end

Instance Method Details

#actual ⇒ Object 



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# File 'lib/Dieta/LList.rb', line 73

def actual
    if @head==nil
        return nil
    else
        return @head.value
    end
end

#each ⇒ Object 



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# File 'lib/Dieta/LList.rb', line 82

def each()
    a=@head
    while a!=nil
    yield a.value
    a=a.next
    end
end

#popb ⇒ Object

saca por el principio



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# File 'lib/Dieta/LList.rb', line 39

def popb()
    if @head==nil
        @head=nil
        @tail=nil
        return nil
    else
        a=@head
        @head=@head.next
        return a.value
    end
    
end

#pope ⇒ Object

saca por el final



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# File 'lib/Dieta/LList.rb', line 52

def pope
    if @tail==nil
        @head=nil
        @tail=nil
        return nil
    else
        a=@tail
        @tail=@tail.back
        return a.value
    end
end

#pushb(value) ⇒ Object

Introduce al inicio



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# File 'lib/Dieta/LList.rb', line 14

def pushb(value)
    if @head==nil
        a=Node.new(value,nil,nil)
        @head=a
        @tail=@head
    else
     a=Node.new(value,@head,nil)
     @head.back=a
    @head=a
    end
    
end

#pushe(value) ⇒ Object

Introduce al final



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# File 'lib/Dieta/LList.rb', line 27

def pushe(value)
    if @tail==nil
        a=Node.new(value,nil,nil)
        @head=a
        @tail=@head
    else
        a=Node.new(value,nil,@tail)
        @tail.next=a
        @tail=a
    end
end

#shownext ⇒ Object 



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# File 'lib/Dieta/LList.rb', line 65

def shownext
    if @head.next==nil
        return nil
    else
        return @head.next.value
    end
end