青苹果水蜜桃

1. Modify the original method to adapt. This violates the principle of "opening up to expansion and closing down to modification."80年代热播的民主德国电视剧，至今仍有许多当年的观众在网上寻找它的下载。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:艾恩斯很烦恼。If the blog park still has an interface to pay more attention to, it has already limited the data to POST requests. At this time, a third-party page will be made, but it contains form submission code, which will be spread through social tools such as QQ and email to tempt users to open it. Users who have opened the blog park will be recruited.　　看