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Let's understand such a problem first, If our front-end development needs are the needs given to us by the demand side, It is possible that a front-end developer will deal with multiple demanders, Therefore, it will keep in touch with multiple demand parties. Then in the program it means keeping references to multiple objects, The larger the program, There will be more and more objects, The relationship between them will become more and more complicated. Now if there is an intermediary (if it is our supervisor) to meet the needs of multiple demanders, Then the demander only needs to give all the requirements to our supervisor, who will assign tasks to us according to our workload in turn. In this way, our front-end development does not need to contact with multiple business parties, we only need to contact our supervisor (i.e. Intermediary), which weakens the coupling between objects.《忠者无敌》是由北京中视精彩影视文化有限公司、北京东方全景文化传媒有限公司、云南广电传媒集团、云南金彩视界影业有限公司联合出品的抗战剧，由陈浩威执导，姚刚、王珂、郑亦桐、崔心心等主演[1]二人相遇，翘儿扑上前一跃，习惯性扑在杨长帆怀里，杨长帆也抱着她转了一大圈，这才放下：跟徐先生聊得兴起，回来晚了。本作は、お笑い芸人の目立たない方、みんなが選ぶものとは違う方、クラスの主役じゃない方、モテない方というような“じゃない方”の男性と、妻“じゃない方”の女性の不倫を描くラブコメディ。你徐家在其中到底做了些什么，寡人一定会查个水落石出，如果今日你想要以此来蒙骗寡人，那么结果之能是徐家会死的更惨。The above is only a model of "Long En" bicycle, If you need to generate other types of bicycles, Other subclasses can be written. The most important advantage of factory mode is that some of the same methods can be implemented. We can write code in the parent class for these same methods. If we need to implement specific business logic, we can rewrite the parent class's methods in the subclass to implement our own business logic. In terms of professional terms, there are two points: First, weaken the coupling between objects and prevent code duplication. Instantiating a class in a method eliminates repetitive code. Second: Repetitive code can be written in the parent class. Subclasses inherit all member attributes and methods of the parent class. Subclasses only focus on implementing their own business logic.　　大山深处，一对性格迥异的叔侄挖出祖传宝贝，谁知在卖宝贝的过程中阴差阳错的卷入了当地黑社会和国际文物贩卖集团的圈套里。懂得八卦易经的叔叔把文物藏在了一个绝对安全的地方，又怎知此地安全到自己都取不出来。笨贼、大盗、黑社会互相角力，坚持善良的侄子终于抱得美人归。