Programmer Help

The authorization protocol of OAuth 2.0 allows third-party applications to access restricted HTTP resources. As usual, when you use Github and Google account to log in to other systems, you use the OAuth 2.0 authorization framework. The following figure is the authorization page diagram of using Github account to log in to Coding system: ...

This example is an annotation based aspect programming practice. This aspect function is mainly used to count the execution time of the annotated method 1. First configure maven dependency: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-b ...

In the distributed scheduling, in order to ensure the high availability and disaster recovery requirements of the service, it is usually said that the service is evenly distributed in multiple areas, racks and nodes, so as to avoid the service unavailability caused by a single point of failure. The algorithm, SelectorSpread, is naturally implem ...

memory allocation Previous courses OS Interface: https://dreamerjonson.com/2020/01/04/6-s081-1/ Systems programming wiki Reference The main difference between system programming and application programming is that application programming is designed to produce software that directly serves users. System programming mainly serves other applica ...

Code connection: Local path (for Copy code): H disk / Baidu online disk: / program backup / QT/QT_EasyClient.zip 1. introduction In fact, the [QTcpsocket](https://doc.qt.io/archives/qt-5.6/qtcpsocket.html) in the Qt network module has been well encapsulated, avoiding the tedious process of programming ...

The following is a Li's understanding of socket programming, hoping to help you; if there are errors, please point out generously; 1: Socket programming preparation 2: Introduction of socket api 3: The introduction and implementation of client / server of udp protocol 4: The introduction and impl ...

CopyOnWriteArrayList problem This article records a problem that may cause data errors in CopyOnWriteArrayList, This problem was originally a conjecture when reading a book, but after verification, it was found that the problem existed. Originally, I thought that there would be no such problem since the jdk was on, but there was no such probl ...

Official information: Shell Functions (Bash Reference Manual) brief introduction As we are Bash script programming learning note 06: conditional structure Finally, we should integrate some code blocks that may be executed repeatedly to avoid overstaffing the code. Function exists to solve this problem. When defining a function, we can integra ...

In the optimization stage, multiple nodes and multiple algorithms are parallel calculated by map/reduce mode, and the final storage results are designed based on the two-level index, so as to achieve the unlocked design in the whole calculation process. At the same time, in order to ensure the randomness of the allocation, the random method is ...

Dart is a new language for me. In order to develop Flutter better, I need to spend some time to learn dart. But Dart seems to be easier to use~ 1. Variable declaration 1. var It can accept any type of variable. As long as var is assigned, its type will be determined and cannot be changed. 2. dynamic a ...