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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.The second scenario uses the proxy pattern, Among them, the myImage function is only responsible for doing one thing, creating IMG elements and adding them to the page. The loading picture is given to the proxy function ProxyImage to do. When the picture is loaded successfully, the proxy function ProxyImage will notify and execute the method of the myImage function. At the same time, when the proxy object is not needed in the future, we can directly call the method of the ontology object.1. HTTP flood attackHeilongjiang Province故事描述20多岁的年轻人Quentin（Jason Ralph）和Alice（Sosie Bacon）在纽约研究魔法时发现自己童年读过的「魔法奇幻世界」不仅是真实的，而且会给地球和人类带来一场灾难。被招募到一所秘密魔法学校后，一群学生发现，他们读到的魔法孩子是非常真实的，比他们想象的更危险。但是这部《佛本是道》也不是没有遗憾。Compiling: Netease's Outside Compiling Robot