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However, there are other software developers who, when designing programs, always name classes with similar patterns, such as so-and-so Facade, so-and-so Factory, etc. In fact, the contents of the classes have nothing to do with the design patterns at all, but are only used to flaunt that they understand the design patterns.町田君是家里的长男，承担了全部家务，包括照顾弟妹。 町田君是班里的学生，成绩真的很一般，文法都不太会。 町田君是个温柔的人，不假思索给予援助，这能算一项特长吗？当然了，云青山还是非常谦逊客气的，尹旭对此也是心里有数。Javascript neither supports abstract classes nor has the concept of interfaces. Therefore, be very careful when using the state mode. If you forget to implement the buttonWasPressed method for a state subclass when writing a state subclass, an exception will be thrown when the state switches. Because Context always delegates requests to the buttonWasPressed method of the state object. Therefore, let the abstract method of the abstract parent class throw an exception directly, which will be found at least during the program run.　　1943年日本侵华战争处于相持阶段，敌人实施三光政策，对我华北地区疯狂扫荡。八路军大部队与日军殊死搏斗，以赵大胆为首的赵家庄民兵队却误把八路军埋下的地雷挖走，闯下大祸，民兵队面临解散。The problem is. . . There is no steam version of the game. . . How to divert. . .-Tail lights, 3 nautical miles;