class Lista

Attributes

cola[RW]

head[RW]

nodo_actual[RW]

Public Class Methods

new(head,cola) click to toggle source

# File lib/dieta/lista.rb, line 9
def initialize(head,cola)
    @head = head
    @cola = cola
end

Public Instance Methods

each() { |value| ... } click to toggle source

# File lib/dieta/lista.rb, line 51
def each
    while @head != @cola
        yield @head.value
        @head=@head.prev
    end

    if @head == @cola
       if @head == nil
        nil
       else
        yield @cola.value
       end
    end
end

extract() click to toggle source

eliminar el nodo y cambiar los valores al nodo anterior

# File lib/dieta/lista.rb, line 39
def extract()
   @cola=@cola.next
end

extract_final() click to toggle source

# File lib/dieta/lista.rb, line 43
def extract_final()
   @head = @head.prev
end

insert(x) click to toggle source

# File lib/dieta/lista.rb, line 14
def insert(x)
    node = Nodo.new(x,nil,nil)

    if @head==nil && @cola==nil
            node.prev = @cola
            node.next = @head
            @nodo_actual = node
            @head = node
            @cola = node
    else
            node.prev = @head
            node.next = nil
            @nodo_actual = node
            @head.next = node
            @head = node
    end
end

insert_multiple(nodos) click to toggle source

# File lib/dieta/lista.rb, line 32
def insert_multiple(nodos)
    nodos.each do |nd|
            insert(nd)
    end
end

to_s() click to toggle source

# File lib/dieta/lista.rb, line 47
def to_s
     @head.to_s
end