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I happened to see such a problem in a thought, How to make part of a div transparent and other parts blurred? Finally, the effect is as followsFurthermore, it can also realize the hollowing effect of any shapeThe place where the mouse passes is clearly visible, and other places are blurred.It may be impossible to start at the beginning. Don't w ...

1. Problem description I saw a blank question from my colleagues in the group two days ago. The general phenomenon is as follows: mysql> select @@version; +-----------+ | @@version | +-----------+ | 8.0.25 | +-----------+ 1 row in set (0.00 sec) mysql> create table t1( -> c1 int, -> c2 varchar(4) check(c2<>'') #No ...

I recently learned a little about the back-end of Node.js, so as a student of the front-end direction, I began to understand the back-end. I didn't say much and began to introduce it. First of all, if you want to better understand this blog, you need to have a basic knowledge of html, css, javascript and Node.js, as well as a little knowledge o ...

preface Entity bean conversion is often inevitable. From the copyProperties of BeanUtil using traditional reflection technology to Object mapping, it basically stops at the dynamic compilation and generation of bytecode using annotation processor. Because it is a set/get calling code generated automatically during compilation, its performance ...

Last article , we analyzed the initialization process of Netty server startup. Today, let's analyze the Reactor thread model in NettyBefore analyzing the source code, let's analyze where EventLoop is used?Connection listening registration of NioServerSocketChannelIO event registration for NioSocketChannelNioServerSocketChannel connection listen ...

backgroundRecently, a self-developed Dubbo registration center in charge often received alarms about CPU utilization, so it carried out a wave of optimization with good results. Therefore, it plans to share the thinking and optimization process, hoping to help you.What is the Dubbo registration center? I'll draw a sketch. Just feel it a little. ...

The 12th class of Guji class Redis distributed lock Introduction to distributed locks Within the same JVM, we often use synchronized or Lock to solve the security problem between multiple threads. However, in the distributed architecture, between JVMs, a better locking mechanism is needed to deal with the thread security problem between cross ...

For some reason, you may often need to find the port name and port number. If so, you're lucky. Today, in this short tutorial, we will see the simplest and fastest way to find the service port number in the Linux system. There may be many ways to do this, but I only know the following three ways. Please read on.Find the port number of the servi ...

The links included in the development and application of machine learning introduce the method and process of running machine learning based on Tensorflow framework on apache hadoop yarn (Introduction to the links involved in development and application of machine learning, and the method and process of running machine learning based on ...

🌊 Author home page: Hai Yong🌊 About the author: 🏆 CSDN high-quality creators in the whole stack field 🥇 HDZ core group members🌊 Fan benefits: Fan group Six books a week and various small gifts a monthCreating games with JavaScript is the most interesting way to learn. It keeps you motivated, which is crucial to learning complex skills s ...