Category：Blogs
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Time：2021-9-18
CountDownLatch Subtraction counter import java.util.concurrent.CountDownLatch; //Counter public class CountDownLatchDemo { public static void main(String[] args) throws InterruptedException { //The total number is 6. It can be used when the task must be performed CountDownLatch countDownLatch = new CountDownLatch(6); for (int i = 0; i < 6; i++) { new Thread(()->{ System.out.println(Thread.currentThread().getName()+” Go out”); countDownLatch.countDown(); },String.valueOf(i)).start(); […]
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Time：2021-9-18
What is JUC In Java, the thread part is a key point. The JUC mentioned in this article is also about threads. JUC is short for Java. Util. Concurrent toolkit. This is a toolkit for processing threads. JDK 1.5 began to appear. Process and thread process Process is a running activity of a computer program […]
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Time：2021-9-18
To get the median of a set of data (for example, the median revenue of a region or a company), we generally divide this task into three sub tasks: Sort the data and give each row of data its ranking in all data; Find the median ranking number; Find out the value corresponding to the […]
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Time：2021-9-18
Rustcon Asia enters the countdown! Just this Saturday, 300 + developers will gather in Beijing to participate in Asia’s largest rust language developers conferenceRustCon Asia。 The conference will gather almost all senior developers of rust Chinese community, Chinese local rust projects that have been applied in the production environment, and top developers from Europe, Australia […]
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Time：2021-9-18
Video address Headline address:https://www.ixigua.com/i677586170644791348…Station B address:https://www.bilibili.com/video/av81202308/ Source address GitHub address:https://github.com/anonymousGiga/learn_rus… Explanation content 1. Match byExample 1: let x = 5; match x { 1..=5 => println! (“one through five”), // that is, the range from 1 to 5 is matched _ => println!(“something else”), } Note: in the example, 1.. = 5 is equivalent to […]
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Time：2021-9-18
It is more or less used in NoSQL development, and it is also a necessary knowledge point for interview. I’ve asked every interview in recent days. However, I feel that the answer is not good, and there are still many knowledge points that need to be sorted out. Here, I’ll comb through several redis notes, […]
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Time：2021-9-18
Introduction How to distinguish Template parameters const disqualify universal reference Auto declaration Introduction T&&Right value references are not always used in Code: void f(Widget&& param); // rvalue reference Widget&& var1 = Widget(); // rvalue reference auto&& var2 = var1; // not rvalue reference template void f(std::vector&& param); // rvalue reference template void f(T&& param); // […]
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Time：2021-9-18
Carbon is a lightweight, semantic and developer friendly golang time processing library, which supports chain calls, lunar calendar, Gorm, xorm and other mainstream orm If you feel good, please give a star github:github.com/golang-module/carbon gitee:gitee.com/go-package/carbon //Yesterday at this moment carbon.Yesterday().ToDateTimeString() // 2020-08-04 13:14:15 //Yesterday and now of the specified date carbon.Parse(“2021-01-28 13:14:15”).Yesterday().ToDateTimeString() // 2021-01-27 13:14:15 //Now […]
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Time：2021-9-18
Vue basic introduction notes 04 Four cases of V-for array Array object object number A key is required in a component <!DOCTYPE html> <html lang=”en”> <head> <meta charset=”UTF-8″> <meta name=”viewport” content=”width=device-width, initial-scale=1.0″> <meta http-equiv=”X-UA-Compatible” content=”ie=edge”> <title>Document</title> <script src=”https://cdn.jsdelivr.net/npm/vue”></script> </head> <body> <div id=”app”> <!– Array — > < p V-for = “(item, index) in list” > […]
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Time：2021-9-18
Hello, I’m ruffian Heng, a serious technical ruffian. What ruffian Heng introduced to you today isConfiguration management and automatic generation mechanism of project link file under MCU Xpress IDE。 Ruffian Heng wrote a special topic in early 2018Embedded development document series, this paper systematically introduces the main file types to be understood in the development […]
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Time：2021-9-18
Binary thresholding First, select a specific threshold value, such as 127The new threshold generation rule is:The gray value of pixels greater than or equal to 127 is set to the maximum value (for example, the maximum 8-bit gray value is 255)The gray value of pixels with gray value less than 127 is set to 0 […]
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Time：2021-9-18
Series articles： Design pattern summary (pattern) Design pattern summary (Theory) Summary of design patterns (practice 1) Practice leads to truth The knowledge content related to the two design patterns summarized above has a relatively clear understanding of how to standardize the code and write the code. In writing the code, we will also deliberately write […]
