Programmer Think

characteristic Wi Fi device scanning Email reminder Wechat reminder (Server sauce) Strange equipment detection principle In Wi Fi networks, the wireless network card transmits signals in broadcast mode. When the wireless network card broadcasts the information, all devices can receive the information. After the wireless network card is set ...

As the most representative language_ Pythonic_ One of the grammar, I believe everyone has heard of or has used the list understanding method. But do you know that there are three types of understanding in this language? In this article, I will discuss what is_ Python_ And why they are used. I'll also discuss when using intelligible expression ...

System.out.println(c2.getSimpleName());//The name of the class that does not contain the package name System.out.println(c5.getName()); } } ClassDemo3.java public class ClassDemo3 { public static void main(String[] args) { String s = ...

brief introduction Whether doing scientific calculation or writing applications, we need to use some basic data structures, such as lists, tuples, dictionaries and so on. This article will explain these basic data structures in Python in detail. list A list is a list, which can be expressed in square brackets: In [40]: ages = [ 10, 14, 18, ...

1. What is distributed lock Distributed lock is a way to control synchronous access to shared resources between distributed systems. In distributed systems, it is often necessary to coordinate their actions. If different systems or different hosts of the same system share one or a group of resources, when accessing these resources, they often ...

preface The strength of MyBatis lies in its mapper file, which is the magic of MyBatis. For any user of MyBatis, the mapping file of MyBatis must be mastered. Mapper file label One of Mapper provides nine top-level tags. We don't need to know about one that has expired. The other eight must be mastered. As long as we master the use of tags, ...

brief introduction How much do you know about MyBatis? Do you know the SqlSessionFactory construction process? Understand the XML parsing process? Do you know what Mapper agent does? This chapter takes you to read the source code with MyBatis 3.5.3, so that you can understand the essence of MyBatis instead of being limited to using it.   S ...

On the production environment or other environments where GC problems are to be tested, the parameters for printing GC logs must be configured to facilitate the analysis of GC related problems. However, many people may not be configured "Perfectly", either too little content is printed, or output to the console, or a large file is ov ...

Special invited author of enjoy learning class: Lao Gu Reprint, please state the source! preface The last large series of articles was called "hand-in-hand explanation", which lasted for 10 months, and produced more than 20 blog articles. The explanations were detailed. Almost every article provided detailed explanation of the ...

Today is February 2, 2022. It's less than two weeks from this year's Valentine's Day.Introducing a website to you, Cunt. I love youReference sample website:A presentation slide. Cunt. I love youSource codeLove timer. Cunt. I love youSource codeApplication processOpen the home page of your website: Cunt. I love you(Since the site database uses P ...