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The reason why the logic for creating an object is put into a separate class is that it can be used by multiple clients. And separates the creation and use of objects. However, this design also has many defects. First of all, SimpleFactory is a specific class, so we must program for the implementation, making the system lose its flexibility in this respect. Second, if we add new products, we have to modify the code in SimpleFactory, which violates the opening and closing principle. The above model is also called simple factory. He does not appear in GOF mode, it is more like a programming habit.他们发现运来的货物，很多时候杨长帆的船队根本不需要再运走，而是直接转卖分发给来往澎湖的民间船只，只有去九州的货才亲自运送。在一个叫“拳击场”的世界里，在一次决斗最后发生了一件意外的事故。 　　只要最后一拳手下留情也不会死......陷入深深自责的拳击手李韩赛真的能通过教死去的对手在这世上留下的唯一的妹妹拳击来洗掉内心的负罪感吗？妹妹真的能原谅打死哥哥的凶手接受他吗？ 　　打死哥哥的元凶变成自己的恩人！两人之间会有爱吗？　　还是一场想爱却不敢的爱？ 　　世界的搏击! 　　一个伴随着拳击运动由一个“假小子”长大成人的女人。 　　这样一个唐突的女拳击手悄悄的登上了用两只拳头打世界的挑战场！胜负的结果..The general code is like this, and I feel that the code using the intermediary mode is similar, so I won't introduce it much here. The code in the book has advantages, but I don't feel that there is much difference, so I no longer use the intermediary mode to write code here. State mode is an unusually excellent mode, which may be the best way to solve some requirement scenarios. Although the state mode is not a simple to clear mode (it often brings about an increase in the amount of code), once you understand the essence of the state mode, you will certainly thank it for its incomparable benefits in the future. The key to the state mode is to distinguish the internal state of things. Changes in the internal state of things often bring about changes in the behavior of things. This article describes the state mode in detailMental Representation Helps Plan//100新加坡电视剧《随心所欲》说的是两个现代女性兼好友elyn（程笛饰）和haze（傅芳玲饰），在一次误会事件中认识了钻石王老五pier（郑斌辉饰）与james（ 沈倾掞饰），四人从此交织出错综复杂的感情。pier是个追求生活享受但不愿被生活束缚的人，可是haze却向往有个传统温馨的婚姻，因此两人之间不断出现矛盾与问题。至于elyn和 james，两人同样只追求生活享受与”曾经拥有”的感情关系，开始他们的相处如鱼得水，可久而久之却想要占有对方，于是他们之间发生了微妙的变化……莫家的大小姐莫诗诗，由于继母女儿的设计被逐出家门至此改名莫诗意，母亲古幼薇是盛名一时的设计师，因病住院却被莫菁菁姐妹害死。莫诗意爱着的沈穆寒，没想到竟是莫莎莎的男朋友，莫莎莎死后，沈穆寒认定是莫诗意所害，用假意的温存骗取莫诗意与他结婚，在结婚后不断折磨莫诗意，莫诗意在丧子之痛中绝望离世。重生后的她带着复仇的怒焰归来，伪善的姐妹，贪婪的继母，她再也不愿与这家人扯上任何关系，至于那个大尾巴狼，此生只想和他一刀两断，再不相见，可谁知他竟然不按套路出牌，明明上一世恨不得将她挫骨扬灰，这一世却在第一时间帮她虐渣立威，甚至自荐为她暖床？莫诗意不得其解之际，却也逐渐对这个她早在年少时便甘愿付出所有的男人心动……