The principle of opening and closing means opening to expansion and closing to modification. When the program needs to be expanded, the original code cannot be modified, but the original code should be expanded to achieve a hot plug effect. Therefore, a summary of one sentence is: in order to make the program scalable, easy to maintain and upgrade. To achieve this effect, we need to use interfaces and abstract classes, etc. We will mention this point in the later specific design.
The above is just a synchronous chain of responsibilities, We let each node function return a specific value "nextSuccessor" synchronously, To indicate whether to pass the request to the next node, we will often encounter AJAX asynchronous requests in our development. After the request is successful, we need to do something so-and-so. At this time, if we apply the above synchronous request again, it will not take effect. Let's understand and use asynchronous responsibility chain to solve this problem. We add another prototype method Chain.prototype.next to the Chain class to manually pass the request to the next node in the responsibility chain.
剧中，李栋旭将饰演外形与实力兼备的医院院长朴理焕，时刻保护着自己的母亲还有好友金杏娥（郑丽媛饰演），
杨长帆点头道，那翘儿，你照顾一下。
山峰巍峨，大河浩荡。
Japan 2.9 million 4 million 6.9 million
Then there will be no suspense for those who lost the first match against Team C.
这部系列剧讲述了四名在圣犹大医院一线工作的年轻护士，他们献身于帮助他人，同时思考如何帮助自己。
徐风能感觉自己屁股后边的鼓包始终没有反应，于是搓了搓自己的手，又吹了两口哈气。
Serinda Swan将饰演剧名角色Jenny Cooper，一个有勇气有决心、但情感脆弱的验尸官，对真相有着锲而不舍的精神。Jenny曾经是一名急诊医生，最近刚刚丧夫，独自一人带着孩子；挚爱的离世打开了与死亡的原初关联，将她的过去的秘密紧密相连。她爱自己的儿子超过爱生活，在尽力抚养他的同时也要照顾自己。
故事发生在一家复古英式酒店，经理石月（黄才伦饰演），从工作到生活，过得像数学公式，无瑕疵且没毛病，年复一年如出一撤。无聊日子终于被一个意外假期所颠覆，妻子（张慧雯饰演）怀孕、乌龙旅途、神秘房客……匪夷所思的离奇事件不断上演，无趣严谨的生活被打破，通关打怪般的解决危机，新生活会不会就在眼前……
雷蒙德·巴隆是纽约一家体育报社的记者。他与妻子戴博拉、四岁的女儿艾利以及一对两岁的双胞胎，迈克和杰夫里，一起住在纽约长岛一栋宽敞漂亮的房子里。雷蒙德在工作上取得的优异成就和宽容风趣的性格让他成为家人的骄傲，以及所有人爱戴的对象；贤妻良母型的全职母亲戴博拉的精心经营更让这个年轻的五口之家成为美国三好家庭的文明典范……
伍兵为了案情与贺雪薇一起去找晓琳晓琳因为抗拒父亲强暴失手杀了而逃到湛海市并贩毒头目司徒杰手下做过事所以决定远离湛海萧文却误认为伍兵和贺雪薇太残酷无情把晓琳赶走
像许多9岁的男孩一样，伊莱·布拉弗曼相信地下室里有威胁生命的东西。有一天晚上，当他姐姐把他独自留在家里时，伊莱发现这个邪恶是真的还是全在他脑子里。伊莱所面对的可能会比他最可怕的噩梦更可怕。
作为天启的铁杆粉丝，他们自然希望启明能干净利落的灭掉星海，可是他们心里也明白，天启短时间内想要写出一部经典的网络小说是不太可能的。
The basic structure of the code is seen above, but we also need an initialization method. The code is as follows:
看电影嘛。
In web development, Picture preloading is a common technique, If you set the src attribute directly to the img tag node, If the picture is larger, Or if the network speed is relatively slow, Before the picture is loaded, The picture will be a blank scene for a period of time. This is not good for the user experience, so at this time we can use a loading loading picture as a placeholder to prompt the user that the picture is being loaded before the picture is loaded. After the picture is loaded, we can directly assign a value to the picture. The following code is as follows when we do not use proxy mode to preload pictures:
叶昭觉是上海“润齐百货”退货处的一名员工，个性开朗、坚强努力，一人供养着追求艺术理想却同样清贫的男友简晨烨。在机缘巧合下，她邂逅了“尘世”珠宝总经理兼首席设计师齐唐，齐唐意外发现叶昭觉的设计天赋并招她进入自己公司。叶昭觉和简晨烨因价值观的不同渐行渐远，不得不以分手告终。而齐唐却渐渐爱上这个自强自立的女孩。齐唐发现了一直以来寻找的绝世珍宝——红宝石“红尘”，他历经艰辛，终于在叶昭觉的帮助下成功得到了“红尘”。经历种种磨砺的众人，最终都得到了自己的圆满。
