抖抖抖短视频app下载

The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From Baidu手机用户请到m.qidian.com阅读。　　小镇上有个军阀，名叫卡洛斯·桑坦纳（丹尼·特雷乔），他残暴不仁危害百姓。拉里他们三人就误打误撞以为卡洛斯就是他们的伊拉因此对于韩信而言，如何才能完全激发出这些士兵的勇气和潜力才是最重要的，韩信对此已经有了主意。山东青年尚晋毕业后，为了能和女友李貌“团聚”而选择留在北京，并在李貌所住的幸福里九号做了一名光荣的人民调解员。因为一次相亲大会上的调解事件，尚晋提前遭遇了李貌父母李双全和万山红，两人对这位“准女婿”似乎并不满意。尚晋使尽“浑身解数”，加之他的父母管红花尚得志齐上阵，终于将两人的婚事推上了正轨。作为调解员，尚晋不仅调解着自己家中的磕绊，也调解着整个幸福里社区的大事小情，大家的日子吵吵闹闹却也开开心心。然而，李双全前妻徐子雯此时突然回国，不仅给李双全带来了有史以来最大的婚姻危机，还给社区的人们带来一枚重磅炸弹—幸福里九号即将拆迁。面对“危机”，尚晋和社区众人用他们对生活的“热爱”给出了最好的解答。