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If we decompile the above suspended function into Java, the result will be as follows: // Continuation is equivalent to CallBack // ↓ public static final Object getUserInfo(Continuation $completion) { ... return "BoyCoder"; } From the result of decompilation, the susp ...

Business component instantiation actually has a large number of application scenarios in enterprise applications. In enterprise applications, the overhead on the JVM under the scenario of frequent creation and destruction of object instances can be unimaginable. Instantiation can reduce the burden of JVM memory management and improve applicatio ...

3. With local version For information comparison, select whether to display the update pop-up window. We use event\_bus trigger if (localVersion == remoteVersion) return;eventManager.eventBus.fire(new UpdateAppEvent(versionInfo)); 4. When upgrading the version, pay attention to the difference Android And IOS (1) IOS to update app ...

1. Principle of agent mode Wrap the object with a proxy object and replace the original object with the proxy object. Any call to the original object must be called through the proxy object. The proxy object determines whether and when method calls are transferred to the original object. 2. Static proxy mode Here is an example of a clothing ...

(4)singleInstance: an Activity stack will be created separately; 8. Optimization of program lock Put the variables created every time in the while loop outside the loop and create them only once //Before modification while(flag){ List<RunningTaskInfo> infos = am.getRunningTasks(1000); String packname = infos.get(0).topAct ...

Design pattern is a programming idea, regardless of front-end and back-end. They will have some same design ideas for programs running in any language and environment. By understanding these ideas, we can improve our programming ability, and writing code will become something to enjoy. We are not only completing the work, but also creating a wo ...

PHP advanced features - Reflection and the combination of factory design patterns [explained in combination with the example of laravel admin code]Use reflection to realize the production of factory mode without creating specific factory classesArticle address http://janrs.com/?p=833 Reprint without authorization of the authorPlease indicate th ...

This article is excerpted from "design patterns should be learned this way" 1 about product hierarchy and product family Before explaining the abstract factory, we need to understand two concepts: product hierarchy and product family, as shown in the figure below. In the figure above, there are three kinds of figures: square, circle ...

What is design pattern? The design pattern is like the chess score in our chess game, with the red side as the head gun and the black side as the horse jump. For some walking methods of red hair, there are some fixed routines when the black side goes down. If you follow the routines, the situation will suffer. Just like you play a game an ...

Design pattern - agent pattern Definition: provides a proxy for other objects to control access to this object. In some cases, one object is not suitable or cannot directly reference another object, and the proxy object can act as an intermediary between the customer and the target object. The class diagram of agent mode is as follows Inter ...