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However, online organizations are also facing many challenges at this stage.In the above code, we use three functions, order500, order200, orderNormal to handle its own business logic, If the current own function cannot handle things, We pass it to the following function to handle it. By analogy, Until there is a function that can handle him, Otherwise, the responsibility chain mode will leave the chain directly, telling that it cannot be processed and throwing an error prompt. Although the above code can be used as the responsibility chain mode, we can see from the above code that the Order500 function depends on functions such as Order200, so there must be this function, which also violates the open-closed principle in object-oriented. Let's continue to understand writing flexible and detachable responsibility chain nodes.Singleton mode: It solves the problem of the number of instantiated objects, such as factories and object pools in abstract factories. Except Singleton, other creative modes solve the coupling relationship brought by new.命运，是否支配一生？而我不可拒抗，当不得命运主人……火凤凰挑战命运，创造人生！ 　　大毒枭倪正亲子倪广生，做事鲁莽冲动，不思进取；养子倪骏为人聪敏，处事干净俐落，甚得正器重。 　　后正与生被捕入狱，正觉悟得前非，嘱骏结束所有非法勾当，发展正当事业，骏因此开罪黑道中人，被诬害贩毒，幸得大律师宋宣仪之养女董舜华帮助，令污点证人推翻口供，获判无罪，唯此事险令华前途尽毁。 　　骏聘华为其法律顾问，华坚强清丽，令骏渐生爱意，生刑满出狱，不满其父将所有事业交骏管理，遂布局陷害骏以继续经营黑业。骏大怒，与生大打出手，骏盛怒离去后，生被杀。骏被控谋杀，华为救骏，不惜作假证供，令骏因证据不足得开脱，华却被判缓刑及吊销律师牌照。 　　骏误会华移情别恋，欲远走他方。后华旧人情人甄孝文指华对骏仍情深一半，骏半信半疑，对文说若华真爱他，可一同离港，骏走之日，久候仍不见华踪影……