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* * Can you finish it depends on fate * *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.汉国已经有败亡的迹象，若是继续跟着刘邦，完全就是坐以待毙。《双重生存》第二季于2011年4月22日在探索频道播出。这一系列紧随科迪·伦丁和戴夫·坎特伯雷之后，他们展示了在各种假设的生存场景中生存所需的条件。虽然汉军在河北之地取得了重大胜利，还在中原打败了项羽。Click "Close Block Editor" and click "Yes" in the pop-up dialog box to exit the "Block Editor".周菡才道：斩草一定要除根。