0 Tool preparation 1.SOEM-master-1.4.0 source code 1 Overview of ecx_siistring function /** Get string from SII string section in slave EEPROM. Get string from SII string section * @param[in] context = context struct handle * @param[out] str = requested string, 0x00 if not found requested string information, 0x00 means not found * @param[in] slave = […]
Tag: ring
How to use vue-cli scaffolding to quickly deploy engineering projects
How to use vue-cli scaffolding to quickly deploy engineering projects Reason why engineering is needed: Modular development: Engineering allows developers to divide the entire project into small modules, each focusing on specific functions. This modular development makes code easier to organize, maintain, and reuse. Automated construction: Engineering tools can automatically perform tasks such as code […]
[SpringBoot] Use Spring Cache to efficiently process cached data
Table of Contents 1. Brief description of Spring Cache 2. Common annotations for Spring Cache 3. @Cacheable annotation 4. @CacheEvict annotation 1. Brief description of Spring Cache Spring Cache is a caching abstraction mechanism provided by the Spring framework to simplify caching operations in applications. It caches the return value of the method. When the […]
SpringCloud GateWay custom filter GatewayFilter and AbstractGatewayFactory
1. GatewayFilter GatewayFilter is a simple interface used to define the behavior of a gateway filter. A gateway filter is a class that implements the GatewayFilter interface and can perform certain operations when a request enters the gateway or when a response leaves the gateway. Filters can be used to modify requests or responses, log, […]
How does Nginx solve the thundering herd effect?
What is the thundering herd effect? When I first heard this term, I thought it was very interesting. I didn’t know what it meant. I always thought it was caused by the strange Chinese translation. Complex said (from the Internet) TLDR; The thundering herd effect refers to when multiple processes (multi-threads) are blocked and waiting […]
3Spring Boot 3 integrates mybatis-plus+druid+mysql
Directory 【3】Spring Boot 3 integrated components: Druid + Mybatis Plus + Mysql integration solution 1. Hikari + jdbc + mysql integration solution increase dependency Add configuration Spring Testng test cases 2. Druid + Mybatis Plus + Mysql integration solution 2.1 Configure Druid Add dependencies Configuration Start Spring Boot Web Starter Spring Testng test cases 2.2 […]
12. Strings and regular expressions
Use regular expressions Related knowledge about regular expressions When writing programs or web pages that process strings, you often need to find strings that conform to some complex rules. Regular expressions are tools used to describe these rules. In other words, regular expressions are a tool. Defines the matching pattern of a string (how to […]
C++ double to string
#include “iomanip” #include <iostream> using namespace std; bool to_int(double value,int & amp; res){ res=int(value); //If the result is min_int/max_int, there is a high probability that the value exceeds the limit, unless the value is exactly equal to 2147483647/-2147483648 return (res > -2147483648 & amp; & amp; res < 2147483647); } string double_to_string(double value,int decimal,bool append_zero) […]
Springboot java introduces Mqtt to receive and send messages under the framework of the front and back separation version
This is just one of them, and it is a superficial method of receiving and sending messages. The synchronization mechanism needs to be communicated and confirmed with colleagues engaged in the Internet of Things to see if it can be implemented. Or if there are many devices, the synchronization mechanism will not be used. First, […]
Design and implementation of information technology knowledge contest system based on SpringBoot
Table of Contents Preface 1. Technology stack 2. Introduction to system functions User information management Learn video management Announcement type management Announcement information management 3. Core code 1. Login module 2. File upload module 3. Code encapsulation 4. Conclusion Foreword Firstly, it takes a lot of time to manage information using traditional methods. Secondly, the […]