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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.　　少年隊成員姊弟受到可怕襲擊，假面騎士Ｘ深入基地拯救無辜市民，與眾怪人展開連場激戰。最後，五位假面騎士：一號、二號、Ｖ３、騎士人與Ｘ共同聯手，誓要粉碎黑暗皇帝的血腥陰謀。斗破苍穹第四季　　本剧讲述了主人公屌丝杀手小黑接到任务去暗杀女主小泽，却不成想碰到了已经被别人杀害的小泽的好友小优，伤心的女主与愤怒的姐妹们以为是小黑受人指使本要杀害小泽却才误杀了小优，威逼利诱下，小黑供出了表面上一直喜欢小泽的黑帮老大埃克斯是如何诱骗自己以及指使自己，不敢相信事实真相的小泽与姐妹们明察暗访，这时正准备逃走的小黑发现女主小泽就是自己小时候一直默默深爱着的玩伴，他决定用自己的生命去保护小泽，但在小黑想方设法保护小泽的同时，他发现在这表象事实的背后还隐藏着一个更大的阴谋......新锐画家温浅被酒吧驻唱乐队主唱白纪然一眼惊艳，邀请白纪然做自己的模特，穷追不舍，却屡遭拒绝。温浅受父之命前往成都文殊院取一件母亲生前藏品送回英国，拿到装有陨石的锦袋，与白纪然再次不期而遇。白纪然认出温浅就是自己儿时在英国认识的小丫头，温浅却不记得他。两人误打误撞，一个因为丢了背包没证没钱没手机，一个想要躲避狂热粉丝的追求，一起踏上“护宝”旅程。