React source code analysis and rendering mechanism

PreparationFor the sake of explanation, suppose we have the following code:function App(){ const [count, setCount] = useState(0) useEffect(() => { setCount(1) }, []) const handleClick = () => setCount(count => count++) return ( <div> Brave Niu Niu, <span>Not afraid of difficulties</spa ...

Posted by adriaan on Tue, 18 Oct 2022 04:26:58 +0300

2.1 Use epoll and reactor to achieve server million concurrency

foreword This article continues the previous article 2.1.1 Network io and select, poll, epoll , using epoll and reactor to achieve server million concurrency. Why do you need to implement a sock_item? Each fd corresponds to a sock_itemsock_item contains rbuffer, wbuffer, rlength, wlength, events, callback, which enables each fd to have an in ...

Posted by leoden on Sun, 16 Oct 2022 04:08:00 +0300

Redis installation and startup (the latest nanny tutorial in 2022)

Redis installation and startup Redis official website address: https://redis.io/ 1. Install Redis on a single machine 1.1. Install Redis dependencies Redis is written based on the C language, so first you need to install the gcc dependencies required by Redis: yum install -y gcc tcl 1.2. Upload the installation package and extract it If ...

Posted by David Rech on Sun, 16 Oct 2022 01:32:58 +0300

this keyword in Java

Use this in ordinary methods In the method of the class, we can use the this. property or this. method to call the current object property or method. However, in general, we choose to omit this..In special cases, if the formal parameter of the method and the attribute of the class have the same name, we must explicitly use the this. attribute ...

Posted by phpvn.org on Sat, 15 Oct 2022 21:11:01 +0300

SpringBoot handles global consent exception

SpringBoot handles global unified exceptions When an exception occurs in the backend or an error occurs in the request, the frontend usually displays as follows Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback. Fri Jun 07 15:38:07 CST 2019 There was an unexpected error (type=Not ...

Posted by intergroove on Sat, 15 Oct 2022 05:07:46 +0300

Mesa Study Note #1: Running MESA

Mesa Study Note #1: Running MESA Running MESA On how to use MESA to evolve a star. The ***$MESA_DIR*** directory has many subdirectories. Most of these subdirectories are modules ("M" in MESA) that provide some specific functionality (for example, "kap" provides routines for calculating opacity). The most important module ...

Posted by adiwood on Sat, 15 Oct 2022 02:03:02 +0300

[Very important] In-depth understanding of "modification" in Git

Glossary staged: has been staged, indicating that the current file has been put into the cache area by the git command unstager: not yet staged, meaning that it has not been placed in the cache yet 0. Note: Git manages changes, not files For now, assume you've fully grasped the concept of scratch pads. Below, we will discuss why Git ...

Posted by matchew on Sat, 15 Oct 2022 01:38:27 +0300

[NovelAI] Deploying AI drawing robots in QQ groups

Table of contents 1. NovelAI 2. UIautomation and pywin32 3. Code 1. AI drawing related 2. QQ group news capture related Fourth, the code effect Five, afterword 1. NovelAI NovelAI is an open source algorithm for drawing two-dimensional pictures. See the deployment method. b station link 2. UIautomation and pywin32 UIautomat ...

Posted by ksteuber on Fri, 14 Oct 2022 05:57:11 +0300

Practical articles: those "soft skills" of interface development

I often see people in technical groups or various blogs arguing about which API testing tool should be used, which http client, postman, apifox, jmeter, how to choose the right tool for you, how to improve productivity, faster After finishing the work at hand, in fact, in the final analysis, there is no best, only what suits you is the b ...

Posted by jamesloi on Thu, 13 Oct 2022 23:47:34 +0300

[Algorithm training camp day2] LeetCode977. Square of ordered array 209. Subarray with the smallest length 59. Spiral matrix II

[Algorithm training camp day2] LeetCode977. Square of ordered array 209. Subarray with the smallest length 59. Spiral matrix II LeetCode977. Square of sorted arrays Topic link: 977. Square of Sorted Arrays first attempt I saw the suggestion to use double pointers, so I started thinking about double pointers. The first idea was to find the posit ...

Posted by qo2o on Thu, 13 Oct 2022 21:03:38 +0300