0

我的check_processors方法应该通过一个处理器数组（由processor_list参数提供）并输出一个包含相同处理器的新数组。

processor_list参数是nil或处理器数组，例如：

    [
      <Processor _id: 5158713883c336812100007f, _type: nil, created_at: 2013-03-31 17:24:08 UTC, updated_at: 2013-03-31 17:24:08 UTC, name: "my_mapping_processor", value: {"something"=>{"something_else"}}, type: "mapping", order: 0>,
      <Processor _id: 5158713883c3368121000080, _type: nil, created_at: 2013-03-31 17:24:08 UTC, updated_at: 2013-03-31 17:24:08 UTC, name: "my_presentation_processor", value: {"something"=>{"something_else"}}, type: "presentation", order: 1>,
      <Processor _id: 5348143r83c93641210d0080, _ty...
    ]

check_processors方法应验证是否存在 2 个特定处理器（由处理器的类型属性识别）。如果没有找到type == "mapping" 的处理器，create_mapping_processor应该它。或者，如果没有找到type == "presentation" 的处理器，create_presentation_processor应该创建它。

下面的代码可以工作，但它所做的工作非常简单，必须用更少的代码就可以实现。

    def check_processors(processor_list = nil)

      processors = []

      if processor_list == nil
        mapping_processor = create_mapping_processor
        presentation_processor = create_presentation_processor
        processors.push(mapping_processor)
        processors.push(presentation_processor)
      else
        mapping_processor_exists = false
        presentation_processor_exists = false
        processor_list.each do |processor|
          processors.push(processor)
          mapping_processor_exists = true if processor.type == "mapping"
          presentation_processor_exists = true if processor.type == "presentation"
        end

        if mapping_processor_exists == false
          mapping_processor = create_mapping_processor
          processors.push(mapping_processor)
        end

        if presentation_processor_exists == false
          presentation_processor = create_presentation_processor
          processors.push(presentation_processor)
        end
      end
      processors #=> [<Processor _id: 5158713883c336812100007f, _type: nil, created_at: 2013-03-31 17:24:08 UTC, updated_at: 2013-03-31 17:24:08 UTC, name: "my_mapping_processor", value: {"something"=>{"something_else"}}, type: "mapping", order: 0>, <Processor _id: 5158713883c3368121000080, _type: nil, created_at: 2013-03-31 17:24:08 UTC, updated_at: 2013-03-31 17:24:08 UTC, name: "my_presentation_processor", value: {"something"=>{"something_else"}}, type: "presentation", order: 1>, <Processor _id: 5348143r83c93641210d0080, _ty...]
    end

    def create_mapping_processor
      mapping_processor = Processor.new(:name => "my_mapping_processor", :value => {"something"=>{"something_else"}}, :type => "mapping", :order => 0)
      mapping_processor
    end

    def create_presentation_processor
      presentation_processor = Processor.new(:name => "my_presentation_processor", :value => {"something"=>{"something_else"}}, :type => "presentation", :order => 1)
      presentation_processor
    end
4

0 回答 0