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When grandpa came to play, he was angry with grandpa: "why did you go there then? Why didn't you join the red army? If you had joined the army in those days, would my family be like this?"If I were to implement a pizza ordering system, I would definitely write the code like this, because this kind of code can be written subconsciously without consuming our brains. However, take a closer look at this code: the purpose of this method is to order pizza. However, the code for ordering pizza also needs knowledge about the production of pizza. This method must know all pizza. Worse still, if the types of pizza are to be expanded or pizza with poor sales volume are to be deleted in the future, then the code for ordering pizza will be modified. It looks very bad and should be revised. Our first step must be to separate the code for producing Pizza from the code for ordering pizza, because you should not let the code for ordering Pizza know the logic for producing pizza, but should hand over the logic for producing Pizza to a special type. In this way, we can cope with future changes-if we want to add or delete pizza, we can directly modify the producer of pizza without affecting the logic of ordering pizza.与其坐以待毙，等到时措手不及，还不如现在早作准备，先下手为强。故事讲述两名好友第一次离开中西部的小镇去弗罗里达度假。在度假时，她们被卷入了一场坏人要杀死镇上每一个人的恐怖阴谋中。该剧是讲述和初恋重逢的40代男女的故事，既不是中年人也不是青春年华的他们，激烈相爱、纠结，迎来人生的第二个“花样年华”。现在好了，大量转载下，越来越多的网友看到了《伤天启》。该剧描述了我国著名国画大师张大千在敦煌近三年时间，临摹敦煌壁画、修缮石窟前栈道、清理流沙的真实故事。到敦煌。张大千一行人起初准备用三个月时间完成壁画临摹，到了目的地后才发现工程非常浩大。面对艰苦的生活和复杂的局势，他如何实现自己的初衷…… 　　该剧展现了二十世纪上半叶中国知识分子的风貌，在场景的安排上采用了大敦煌、大西、大中国的概念，戈壁、沙漠、胡杨林、阳关遗址、旧城堡等都是剧中人物活动的空间，展示了大敦煌的文化内涵和大西北的壮美风光。