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We use the global publish-subscribe object encapsulated above to realize the communication problem between the two modules. For example, there is now a page with a button. After clicking this button each time, the DIV will display the total number of clicks on this button. The following code: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:李海和吴婷是一对令人羡慕的中年夫妇，为了女儿英子的教育，全家移民到了加拿大。但李海放不下国内的事业，只身留守在成都。长年的分离，让两人渐渐产生陌生感。才华横溢的赵晓菲闯入了李海的生活。汶川地震，生与死的考验，让李海和晓菲相爱了。吴婷得知后，奋力保护婚姻，让李海和晓菲分开。金融危机，李海的事业即将崩溃，为了保护妻女，他选择离婚。吴婷在晓菲的帮助下，力挽狂澜，用自己的钱替李海还清债务，与李海携手将公司带出绝境。晓菲也找到了属于自己的真爱。Another main technology to prevent SYN attacks is to adjust TCP/IP protocol stack and modify TCP protocol implementation. The main methods include SynAttackProtect protection mechanism, SYN cookies technology, increasing the maximum half connection and shortening the timeout time. The adjustment of TCP/IP protocol stack may cause some functions to be limited, and administrators should do this work on the premise of full understanding and testing.The above physical attack power is the final weapon physical attack power of this weapon, which will change due to changes in enchantment, reinforcement and increase.Although the propaganda posters of the Second World War once said the truth that "more words must be lost", "knowledge is power" is also an indisputable motto, especially in the protection of modern business technology systems. There is no doubt that as the chief information security officer of an emerging banking organization, it is absolutely substandard to choose to avoid talking about it after the first round of attacks. Facing the security threat, what everyone needs is smooth information, new attack data and the development trend of defense system, all of which need a good communication environment.池玥笑了：看来你也是被人焐热的？虽然我现在还没爱上他，但是他是我现在唯一想爱上的人了。