Question

我有一个包含相等的基类？方法。然后我继承了那个对象，想要使用相等的？超类中的方法作为平等的一部分？子类中的方法。

    class A
       @a
       @b

    def equal?(in)
       if(@a == in.a && @b == in.b)
         true
       else
         false
       end
    end
end

class B < A
      @c
  def equal?(in)
   #This is the part im not sure of
     if(self.equal?in && @c == in.c)
       true
     else
       false
     end
   end
end

如何在子类中引用继承的A类对象，以便进行比较？

干杯

丹

Answer 1

class A
  attr_accessor :a, :b
  def equal? other
    a == other.a and b == other.b
  end
end

class B < A
  attr_accessor :c
  def equal? other
    # super(other) calls same method in superclass, no need to repeat 
    # the method name you might be used to from other languages.
    super(other) && c == other.c
  end
end

x = B.new
x.a = 1
y = B.new
y.a = 2
puts x.equal?(y)

比较两个继承的对象Ruby

1 个答案: