The fundamental reason for using design patterns is to adapt to changes, improve code reuse rate, and make software more maintainable and scalable. In addition, the following principles should be followed when designing: single responsibility principle, open and closed principle, Richter substitution principle, dependency inversion principle, interface isolation principle, composite reuse principle and Dimit principle. Each design principle is described below.
知青白鸽（徐百卉饰）美丽、善良。因为闺蜜救自己而献出了生命，为了报恩，白鸽发誓照顾闺蜜的孩子，代替孩子的生母完成母亲的职责。为了养育孩子，外柔内刚的白鸽忍受着各种不解甚至羞辱，面对磨难含辛茹苦不离不弃，在经历了许多变故之后，最终让孩子在“多爸多妈”的大家庭中健康的长大……
讲述了杂志社女记者将自己与十二星座男人交往的经历写成专栏而引发的一系列故事。讲述了平凡的女人和十二星座男人展开的十二色恋爱故事。高俊熙剧中饰演具有自由灵魂的摄影师坦野。
林晓洁（陈乔恩饰演）是北海市海悦百货的打杂小妹，无意中得到了上司高子齐在记者会上的表白。然而，在婚礼前夕，女星白季晴（蒋怡饰演）却突然出现，林晓洁这才明白，自己并不是高子齐（高以翔饰演）的真爱。伤心之下林晓洁决心离开，来到上海遇上了汤骏（张翰饰演）。汤骏就是林晓洁在网络上结识的知心朋友-----汤姆，然而，林晓洁并不知道汤骏就是汤姆，此时，汤家企业受到威胁，林晓洁决定帮助他们。凭着过人的工作能力，林晓洁不仅让汤家走出困境，也成就了自己的事业。
State mode and policy mode are like twins. They both encapsulate a series of algorithms or behaviors. Their class diagrams look almost identical, but their intentions are very different, so they are two very different modes. The policy pattern and the state pattern have in common that they both have a context, policies or state classes to which the context delegates the request to execute
网上关于这首诗，已经有了无数评论。
所以，刚才他竟然表达了自己的愿望，而不是像平常那样听话，黄豆可不高兴，当然百依百随了。
一部催眠放松剧，通过催眠影像和众星的旁白结合起来，以达到放松的效果。该剧一共10集，每集半小时
** Tablets, film-coated tablets (Filmtablette)
所有的监控摄像头都已经被升级和联网到一体，通过监视人类的色相浑浊程度和声音、视频等信息用来计算人类的每个心理状态和个性倾向所衡量的值，通称：（即片名：心理测量者PSYCHO-PASS），它被用作判定人们的思想应有PSYCHO-PASS状态、个人精神本身。通过计算这些数值，系统可以自主断定一个人最理想的工作，感情，心理压力，甚至犯罪意图。
剧中故事发生在二十一世纪的今天。通过海军试验部队未来战争中的撒手锏“海剑”信息化超音速舰导弹，深入地刻画了新老两代科学家工作者对试验模式的不同观点，由此引发了新老观念的激烈碰撞，既歌颂了以专业所所长秦海川为首的老一代科学家爱岗敬业，无私奉献的品德，又充分展示了高天浩、林爽、唐山等新一代接班人勇于开拓探索，大胆改革创新的精神。
该剧聚焦婚姻中女性的自我觉醒与成长，以及女性互助的力量，女性对自身处境的反思等热点议题。
Give a specific example to facilitate everyone's understanding.
老威被越来越多的人关注，这一次他几乎成名，却又一次和机遇擦肩而过，他只惆怅了两分钟，又开始追逐自己的新生活……
如今可是既富又贵，因此想要好好操办嫁妆，觉得年前成亲有些赶，说还是定在年后吧。
卧槽。
If we need to do something later, we also need to write the called method in it. In this way, the code is highly coupled, so we now use the publish-subscribe mode to see how to refactor the above business requirements code.
Centos7, The service is no longer started using init-style scripts, Instead, the unit file is used, Therefore, commands like service iptables start can no longer be used in centos7, Therefore, service iptables save cannot be executed. At the same time, firewall is used to replace the original iptables service in centos7, but don't worry, we just need to install iptables and iptables-services through yum source (iptables are usually installed by default, but iptables-services are not installed by default in centos7). After installing iptables-services in centos7, the rules can be saved by the service iptables save command, as in centos6, and the rules are also saved in the/etc/sysconfig/iptables file.
