Programming VIP

Section 1 Dubbo dynamically generated classes When dubbo calls the exportServices() method, it will use code generation technology to dynamically generate the subclasses of Protocol$Adaptive, ProxyFactory$Adaptive and Wrapper. Dubbo uses javassist to dynamically generate classes. Dubbo has two scenarios using dynamic classes. 1)ExtensionLo ...

C language notes - day04 P34_ recursion 1. Application of recursion Hanoi 2. The essence of recursion In principle, recursion is the behavior of the function call itself. 3. Write recursive procedures need to pay attention to Recursive exit: the recursive program needs to set the end condition correctly, otherwise the recursive progra ...

DCL & Function & Index review Multi table relation: One to many: Add multiple foreign key columns to a general table,The value is the primary key of a table To ensure the validity and integrity of data,Generally, after the table is under construction,Adding foreign key constraints by modifying table relationships alter table M ...

Author: Liu Tianyu (Qian Feng) Engineering corruption is a very difficult problem in the process of app iteration, involving extensive and detailed details, which has a relatively "hidden" and indirect impact on R & D Efficiency & experience, Engineering & product quality, stability, package size and performance. Gen ...

Spring notes 1, Spring understand Spring concept: make the existing technology easier to use, integrate the existing technical framework, and simplify enterprise application development; advantage: Spring is a free and open source framework Spring is a lightweight, non intrusive framework that has no impact after adding the spring framework ...

1, Pytest benefits awareness: 1. It can combine all automatic test tools 2. Skip the failed case and rerun the failed case 3. Combined with allure production report 4. Continuous integration with Jenkins 5. Many powerful plug-ins pytest-html: production html Test report pytest-xdist: Multithreading pytest-ordering: Change the execution seq ...

Optional chain operator Optional chain operator (?.) It is not necessary to verify whether the value of each link in the chain is explicitly valid, but whether it is allowed to read the value of each link in the chain The function of the operator is similar to The difference of chain operator is that it will not cause an error when the referen ...

Special course (comprehensive case) Programming thinking training 1. Programming thinking The ability to use the learned Java technology to solve problems and write code 2. Suggestions on improving programming thinking and programming ability Programming thinking and programming ability are not formed overnight. It takes time to precip ...

Relevant knowledge pointsWhat is AST abstract syntax treeCompilation process of programUse of ASTBabel's principleExamples and thoughts of burying points based on babel in personal implementationWhat is AST abstract syntax treeCompilation process of programWhat is program compilation? As we all know, in the traditional compilation language proc ...

In our development, network requests often encounter the judgment of various error codes. For example:Not to mention the normal error codes, it is impossible for us to judge these codes in the project every time, which is too troublesome. Just during the internship, there were many needs in the project, so I wrote a simple gadget.The code is ve ...