ThreadLocal principle, role, memory leak and usage scenarios

Purpose of ThreadLocal Two usage scenarios: 1. Typical scenario 1: Each thread needs an exclusive object (usually a tool class, the typical classes to be used are SimpleDateFormat and Random) 2. Typical scenario 2: Global variables need to be saved in each thread (for example, user information is obtained in the interceptor), which can be us ...

Posted by mrheff on Tue, 04 Oct 2022 13:47:47 +0300

Design Patterns - In-depth Explanation of Builder Patterns

3.4 Builder Mode Definition: The Builder Pattern is also called the Builder Pattern. In actual development, when the objects we need are very complicated to construct, and there are many steps to be processed, the Builder Pattern is very suitable. For example, in the creation of the SqlSessionFactory object in MyBatis, we not only need to ...

Posted by magmazing on Tue, 04 Oct 2022 10:32:38 +0300

HTML Basics Headings, paragraphs, styles, links, images, tables

Hbuilder automatically completes the formatting, and the shortcut key for formatting is: ctrl+shift+f </p> Hahahahaha, happy! Note that it is in English! ! !</p> 1.</p> <p>This is a paragraph</p> The p tag is the beginning of a paragraph. If you don't set the position deliberately, it will start from the l ...

Posted by jase35750 on Mon, 03 Oct 2022 03:12:39 +0300

A long article to study Spring - DI

3 DI 3.1 setter injection of dependency injection Note: Dependency injection is actually a process of assigning values ​​to properties in the current bean; it is actually very simple to implement this process in Spring, you only need to create a sub-label property for the corresponding bean tag in the configuration file, and specify the n ...

Posted by the_NEWBIE_ON_THE_BLOCK on Mon, 03 Oct 2022 00:26:35 +0300

Qt-plugin creation and application reference

  Qt-plugin creation reference qt-plugin creation extension of functionality. Qt provides two APIs to create plug-ins: high-level APIs used to extend Qt itself, such as custom database drivers, image formats, text encoding and custom styles, etc.; low-level APIs used to extend Qt applications. If you want to write a plugin to extend Qt i ...

Posted by volomike on Sun, 02 Oct 2022 21:33:16 +0300

MindSpore Installation Tutorial

  1. What is MindSpore Description: (very useful) MindSpore: A new generation of AI open source computing framework.  The innovative programming paradigm makes it easier for AI scientists and engineers to use, and facilitates open innovation; the computing framework can meet the needs of terminal, edge computing, and cloud scena ...

Posted by xxxzom_biexxx on Sat, 01 Oct 2022 04:32:56 +0300

OpenSSH installation and use under Windows

OpenSSH is the open source version of the Secure Shell (SSH) tool used by administrators of Linux and other non-Windows systems to manage remote systems across platforms. OpenSSH was added to Windows in fall 2018 and is included in Windows 10 and Windows Server 2019. SSH is based on a client-server architecture, where the system the user works ...

Posted by SoberDude on Thu, 29 Sep 2022 05:12:09 +0300

[ES] I can't learn ES2021. This time, I will only learn 3.

Pants, what have you been doing lately?I was watching ES2021 recently.It's only 2020. What can you learn from 2021Your progress in 2020 is 84%▓▓▓▓▓▓▓▓▓▓▓▓▓░░░ Tell me, what have you learned? Also, can you put it simply? I'm afraid I can't learn.At present, there are 5 new features that have been identified. In order to let you re ...

Posted by GravityFX on Wed, 28 Sep 2022 00:50:37 +0300

[NumPy Basis] - Numpy array and vector calculation

🤖🤖🤖🤖 Welcome to this blog 🤖🤖🤖🤖 😆😆😆😆😆😆😆 Hello, I'm: I love learning 😆😆😆😆😆😆😆 A little white who just started 👻👻 👻👻 Working direction: computer vision 🔔🔔 I love to learn, but there are mistakes in sharing. Welcome to point out 🔔🔔 🌏🌏🌏 This article introduces: learning about Numpy Why should we learn N ...

Posted by valshooter on Mon, 26 Sep 2022 23:04:36 +0300

Quickly experience Spring Boot, learn how to use, run and package | SpringBoot 2.7.2 Learning Series

🚀 Quality resource sharing 🚀 Learning route guidance (click to unlock)Knowledge orientationCrowd positioning🧡 Python actual WeChat ordering applet 🧡Progressive classThis course is a perfect combination of python flask+WeChat applet, from project construction to Tencent cloud deployment and online, to build a full stack meal ordering syst ...

Posted by dimitar on Mon, 26 Sep 2022 21:24:21 +0300