Programmer Think

1.Data Guard Chapter 1 detailed reading - Portal 2 detailed explanation of DG services – Redo Transport Services Chapter 2 detailed reading - Portal 3 DG Services details – Apply Services 3.1 Apply Services The application service can automatically apply the received redo data in the standby database, so as to maintain the syn ...

preface Cheat Engine is a game focused cheater. It can be used to scan the memory in the game and allow them to be modified. This tool may not have been heard of, but the famous Jinshan Ranger must have been used by everyone more than ten years ago. By chance, I saw a project written by Rust. I liked his concise grammar and gathered the advan ...

Controller controller The controller is responsible for providing the behavior of accessing the application, which is usually implemented by interface definition or annotation definition. The controller is responsible for parsing the user's request and transforming it into a model. A spring controller can be contained in more than one sprin ...

Tree structure: tree structure is a data structure that describes nonlinear hierarchical relationships. A tree is a set of n data nodes, which contains a root node. Under the root node, there are some non intersecting subsets, which are subtrees of the root node. Basic characteristics of tree structure: (1) In a tree structure, there is only ...

react source code analysis 6 Legacy mode and concurrent modeVideo Explanation (efficient learning): Enter learningreact start modeReact has three modes to enter the entry of the main function. We can access it from the official document of react Use Concurrent mode (experimental) Three modes are compared:legacy mode: reactdom render(<App /&g ...

1. Spring MVC overview 1.1 spring MVC concept Spring MVC is also called Spring web mvc. Spring is a built-in MVC framework in spring 3 Publish after 0. Spring MVC framework solves the common problems in WEB Development (parameter receiving, file uploading, form verification, etc.), and it is simple to use and has nothing to do with spring Sea ...

Explore React synthetic events 1, What is a composite event React synthetic event is an event object that can simulate all the capabilities of native DOM events, that is, the cross browser wrapper of browser native events. It defines synthetic events according to W3C specification, is compatible with all browsers, and has the same interface as ...

STM32 SPI obtains the angle data of magnetic angle sensor AS5048A AS5048A is a 14 bit precision magnetic angle detection sensor with SPI interface. In fact, the stability accuracy is only 12 bits, that is, when the detection environment is static, the last two bits of data output are changing and not constant. AS5048A can be used for rotation ...

1. Custom thread pool Thread is a kind of system resource. Every time it is created, it will consume some system resources. If a new thread is created for each task in a high concurrency scenario, it will occupy a lot of system space and even cause the problem of memory overflow. Moreover, the number of threads cannot be too large. If there ...

Wechat search: Menon StayUp Home address: https://gozhuyinglong.github.io Source code sharing: https://github.com/gozhuyinglong/blog-demos Simple Factory Pattern is a simple implementation of factory pattern. It belongs to creation pattern. There is only one "factory" class in the Simple Factory Pattern, which can create diffe ...