Question

我试图通过重写抽屉类中的方法“remove_item”来删除@contents数组中的Silverware类。此方法应该采用银器的@type名称的参数。

class Drawer
attr_reader :contents
    def initialize
        @contents = []
    end
    def add_item(item)
        @contents << item
    end
    def remove_item(item = @contents.pop)
        @contents.delete(item)   # I have to fix this.
    end
end

class Silverware
    attr_reader :type
        def initialize(type, clean = true)
          @type = type
        end
end

silverware_drawer = Drawer.new    # creating new drawer
silverware_drawer.add_item(Silverware.new("spoon"))    # adding silverware
p silverware_drawer.contents    # I get this >> [#<Silverware:0x007f84aa091ad8 @type="spoon",     @clean=true>]

p silverware_drawer.remove_item("spoon")    # removing spoon
p silverware_drawer.contents    # Show drawer and I still get [#<Silverware:0x007f84aa091ad8 @type="spoon",     @clean=true>]

任何帮助将不胜感激！提前谢谢！

Answer 1

你没有传入对象。你只是传递了这种类型。所以你必须找到类型＆＃34;勺子＆＃34;并从数组中删除它

def remove_item(item)
   @contents.delete(@contents.find{|content| content.type == item})
end

如何在Ruby中删除数组内的类实例？

1 个答案: