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西九龙重案组卧底警员山哥向高级督察唯sir发送线报,本港最大毒 枭“金先生”将亲自交易今年最大宗的毒品,涉及金额达二千万美元。然而这次 交易竟然是毒枭们为了找出警方卧底的调虎离山计。卧底山哥不慎暴露遭遇贩毒 集团全力追杀,其卧底的身份也被突然删除,一时之间山哥陷入黑白两道的漩涡 纠纷之中。 山哥必须在期限内“证明自己的清白”并且粉碎大毒枭“金先生”的阴谋......板栗顺手抄起一根木棒，和小葱顺着掉落的花生往溶洞更深处找去。Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows:The fabric first becomes yellowish through leaf-dyeing.清洁工人老杜在工作时捡到了三十万元巨款。他心无杂念，第一时间把钱带回环卫队，联系到失主后交还了三十万元巨款。电视台一名新进女记者前来采访，队里上下对此事都是全力配合，但老杜却拒绝接受记者的采访。当晚播出的电视节目里……First of all, let's introduce the business: in the purchase process, you can select the color of the mobile phone and enter the purchase quantity. At the same time, there are two display areas in the page, which respectively display the color and quantity that the user has just selected. There is also a button that dynamically displays the next operation. We need to query the inventory corresponding to the mobile phone of this color. If the inventory quantity is less than the purchase quantity this time, the button will be disabled and the copy with insufficient inventory will be displayed. Otherwise, the button will be highlighted and can be clicked and displayed if the shopping cart is displayed.讲述中情局的柏林分部出现了情报被泄露的情况， Richard Armitage饰演的丹尼尔奉命调查，但他越深入地查下去，就发现水越深，很多人的命运可能被永久改变...