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Validator.add (registerForm.password, 'min Length: 6 ',' Password length cannot be less than 6 bits');A) Object-oriented paradigm. That is, people's legendary thoughts. Encapsulation, inheritance and polymorphism, in my opinion, are slightly higher than if, for, etc., which are also grammatical problems. The three principles to master in object-oriented programming are Plato principle, Liskov substitution principle and Parnas principle. These three principles are actually very simple. Any principle that you find difficult to fall in love at first sight and quickly identify with is not a good principle.(2) When the NIO thread is overloaded, the processing speed will slow down, which will lead to a large number of client connections timeout, which will often be retransmitted after timeout, which will further increase the load on the NIO thread and eventually lead to a large number of message backlogs and processing timeout, thus becoming the performance bottleneck of the system;/greetings濑文在和当麻办案的过程中，渐渐趋近了一个鲜为人知且充满阴谋和秘密的未知世界……MDT team members should recognize the need for continuous learning;