ruby 编写迭代器

class My
    def initialize(name,age)
        @name=name
        @age=age
    end
    def sayName
        puts @name
    end
    def sayAge
        puts @age
    end
    def repeat(num)
        while num>0
            yield
            num-=1            
        end
    end
end
m=My.new("wanan", 23)
m.repeat(3){puts "test"}