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One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.狼人和吸血鬼之间的大战还在继续。当麦克尔（斯科特•斯比德曼 Scott Speedman 饰）和西丽妮（凯特•贝金赛尔 Kate Beckinsale 饰）还在企图以自己薄弱的能力阻止这场大战时，阴谋家们的杰作又诞生了――狼人和吸血鬼融合的具有超强能力的种族――“血族”。马克思（托尼•库兰 Tony Curran 饰）便是便是这个种族的第二代。他杀死了父亲，夺取了密钥和西丽妮的记忆，救出了一个是狼人、一个是吸血鬼的被囚禁千年的孪生兄弟，企图一统狼人、吸血鬼和人类三大种族。昔日的广东十虎铁桥三厌倦世事争端，与女儿如花隐居小镇。恶霸毛良抢走了铁桥三的大洋，被铁桥三痛打，毛良借此在富家公子冯十二面前诬告铁桥三。十二找到铁桥三比试，惨败后拜师门下，在学艺过程中，卷入铁桥三和北派猴拳王的争斗当中，并与铁桥三的女儿如花发展成恋人。可是事实到底如何呢？往往是难以预料的………,相对于刘邦的哭丧脸，项羽的无可奈何，韩信的窃喜，越王尹旭却是乐呵呵地。Note: The above codes are all done according to the book. They all read the code of the book. The most important thing is that we understand the implementation of the policy mode. For example, the above form verification function is the code packaged in this way. We usually use JQuery plug-in form verification code to be packaged in this way. Therefore, we can also use this method to package forms and other learning in the future.CBS宣布续订动作冒险剧《#血宝藏# Blood & Treasure》第二季。一群喧闹的大学生来到了人迹罕至的小树林里，这五个朋友准备在这里度过一个放纵、开心、难忘的周末。根据指示，他们找到了位于树林深处的一个小木屋，准备在这里开始自己的派对。