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Although there are subclasses in java that implement the interfaces of the parent class, But I think javascript can be different from java, It is possible that the parent class in java is an empty class, Subclasses to implement the interface of the parent class, in javascript, I think the common code is completely written in the parent function. If the business logic needs to be changed in the future, or new business logic is added, we can completely use subclasses to rewrite the parent class, so the code has strong scalability and is easier to maintain. Since I am not a professional java, please understand if there is any mistake in describing the knowledge points in java ~ ~Generally speaking, a delegate is a class that maintains a field inside and points to a method. Events can be regarded as variables of one delegate type, and multiple delegates or methods are cancelled through event registration. This article uses delegate and event execution methods to understand the difference between the two.20世纪20年代，牟氏家族是由五大家庭组成，在山东乃至全国都是名门望族。家族的少壮派掌门人牟金突然病危，牟金的几个叔叔都虎视眈眈欲取而代之，少奶奶姜振帼不得不压抑着悲痛与围绕牟家掌门人之争的二爷、四爷和五爷周旋。尤其是身为二品官兼栖霞县商会会长的二叔牟宗升，更是志在必得的样子，不择手段争夺掌门人之位。美丽、聪明的少奶奶，忍受着失去爱人的悲痛，为了家族的兴旺，毅然迎接挑战，在婆婆鲁氏(大太太)的鼎力帮助支持下拉拢心怀不轨的四爷牟宗昊……选举仪式在祠堂举行，大太太提出由儿媳妇姜振帼代表日新堂争夺掌门人，并用各种事实说服了各位老爷。二爷家月新堂早已高朋满座，各房太太们纷纷巴结二太太，月新堂杀鸡宰羊，万事俱备，只欠东风。祠堂，按四爷订的规矩，选举采取不记名的投豆方式。红豆、绿豆分别代表大太太和二爷。第一轮，红豆绿豆持平，竟冒出了一颗豌豆！四爷动员再投一次，结果却是姜振帼险中胜出。姜振帼最终艰难的当上的掌门人，掌理了家族门户。然而，如何应对家族内部的尔虞我诈，继承光大牟氏家业，成为考验少奶奶第一道　　快看天上，似乎有一只狗刚刚飞过……没有害怕的必要，“超人狗”在这里！Adapter mode of interface: When you don't want to implement all methods in an interface, you can create an abstract class Wrapper to implement all methods. When we write other classes, we can inherit the abstract class.　　3×02 《Guardians》：Cole和Jones前往第一次世界大战结束后的法国寻找Jennifer Goines，他们遭遇一个危险的时间旅行团队：「守护者」（Guardians）。《信义》是以恭愍王元年为时代背景的史剧，剧中李敏镐饰演的角色是一名20岁左右的王的护卫崔莹，并与穿越来到高丽时代的医生恩琇之间展开共同辅助拯救天下百姓的王成就伟业的历史剧。