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From the above command class code, we can see that any operation has an execute method to perform the operation. The above code uses traditional object-oriented programming to implement the command mode. The procedural request call of the command mode is encapsulated in the execute method of the command object. Have we found the above writing code a little cumbersome? We can do this using the callback functions in javascript, In object-oriented, The receiver of the command mode is saved as an attribute of the command object, and the command execution operation is agreed to call the command.execute method. However, if we use the callback function, then the receiver is closed in the environment where the callback function is generated, and the execution operation will be simpler. Only the callback function can be executed. Let's look at the following code:郑氏的教导，从两件事上让他获益匪浅。　　 如此安排据传目的在于：1979年《天蚕变》一剧，促使无线电视腰斩单元节目，急召郑少秋等人拍摄《楚留香》，威胁到《天蚕变》的收视率。同时，丽的电视一方随即反应，麦当雄抽调潘志文等人拍摄同样讲述楚留香故事的《侠盗风流》，以削弱《楚留香》收视率，从而保障《天蚕变》的收视率。这里叫七里滩，距离北面靖军的中军营寨还有不到十里的路程。"It's also our little Charlie's credit!"The value of this Token must be random and unpredictable. Due to the presence of Token, the attacker cannot construct another request with a legitimate Token to implement CSRF attack. In addition, when using Token, attention should be paid to the confidentiality of Token, and sensitive operations should be changed from GET to POST as far as possible, and submitted in form or AJAX form to avoid Token disclosure.小说这一章到此结束。