Programmer Group

preface 1. This article mainly refers to Blogs: Click to enter , it integrates the pseudo distributed environment construction and some pit stepping matters.2. There are three node machines built in the environment: pc1, pc2 and pc3. Among them, pc1 is the management machine, and the three node machines all use the user Sillyhumans. If t ...

catalogue one, Kernel compilation and installation 1. Download relevant data package 2. Decompression 3. Merge patches 4. Kernel configuration Modify grub startup profile Reference link   1, Kernel compilation and installation 1. Download relevant data package The current environment is Ubuntu 18.04. The ROS melody environme ...

preface         These two days, I have learned the knowledge of branch statements and circular statements in C language, and my understanding and understanding of C language is finally on track. Branch and loop make the program have unlimited possibilities, so that the program is no longer rigid and can only execute one ...

catalogue preface environment Crawler code Keyword extraction code Main program code summary preface Recently, I was on a business trip and found that there was Xiaoqiang in my hotel. So when I was bored on a business trip, I wrote some crawler code to play. Asking is the occasion. This article mainly crawls the 100 titles of CSDN's ...

[guide] previously, the test partners scanned through tools. The platform TLS SSL protocol supports TLS v1.1, which is not safe. The TLS SSL protocol should be at least v1.2 or above. It is thought that we have only supported v1.3, which should not be the problem of our platform. Recently, the third-party partner mentioned this high-risk sec ...

Dependency injection When class a needs to rely on class B, that is, it needs to instantiate class B objects in class A for use, if the functions in class B change, the places where class B is used in class a will also be modified, resulting in high coupling between Class A and class B. The solution at this time is that class A should rely o ...

catalogue 1: Interpolation Example 1: 2: Instruction Example 2: 3: Dynamic parameters Example 3: ​   4, Filter   Global filter Local filter Example 4   V. calculation attribute and listening attribute Example 5   1: Interpolation     ① Text           {{msg}}     ② html       &nbs ...

USB interface Universal Serial Bus (USB) is not only a serial bus standard, but also a technical specification of input and output interfaces. It is widely used in information communication products such as personal computers and mobile devices, and extended to photography equipment, digital television (set-top box), game consoles and o ...

Catalog 1. Interruption 1. What is an interruption 2. Break the whole process 3. Role of interruption 4. Interrupt Priority 5. Interrupt response process   2. Interrupt System of STM32   1. Priority Grouping 2. Programming steps 3. Specific functions   3. Use interruption to light up LED 4. Interrupt for Serial Comm ...

1: Introduction to thread pool Using thread pool, you can reuse threads and control the total number of threads. If the thread pool is not used, a new thread should be opened for each task. The overhead of repeatedly creating threads is large, and too many threads will occupy too much memory. This is too expensive. We want to have a fixed num ...