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Visitor pattern decouples the data structure from the operations acting on the structure, making the operation set relatively free to evolve. Visitor pattern is suitable for systems with relatively stable data structure and easy change of algorithm. Because visitor mode makes it easy to increase algorithm operation. If system data structure objects are easy to change and new data objects are often added, visitor mode is not suitable. The advantage of visitor mode is that it is easy to add operations, because adding operations means adding new visitors. Visitor mode centralizes the relevant behaviors into one visitor object, and its changes do not affect the system data structure. Its disadvantage is that it is difficult to add new data structures. -From Encyclopedia「课题很简单，而规则只有一个。」贾杰侦探是个经过生化实验的半机器人，他全身上下装有14,000个精巧的机关，办案成绩卓著，一直是城市里最有名的侦探，坏心的克劳博士却要故意陷害贾杰，因此他必须想办法重振自己的声威。不会与谁牵连的孤独用餐，只有一个人才能专注于美味的饭菜，忘记日常和养精蓄锐！饭丰万理江饰演不擅长与人互动，没有朋友的别扭女生川本。柄本时生饰演以whitehose的帐号在Instagram上发布美食物照片的白石。一边想着，脚下不停地就往外走。在未来世界里，以希特为首的一群毫无环保意识的人，为满足自己的贪欲，过度地使用高科技和自然资源，自然环境的恶化，导致无数动物陷入濒临灭绝的境地，甚至危及人类的生存安全。Factory, Builder, Factory Method, Prototype, Singleton, Facade, Adapter, Bridge, Composite, Decorator, Proxy, Command, Interpreter, Iterator, Mediator, Memoto, Observer, State, Strategy, Template Method