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hello everyone! I am an old ape. I love technology. I have been in the Java industry for 7 years and am on the way to learn and share every day! thread 1. Introduction As we all know, multithreading brings us better resource utilization and better program response, so I won't elaborate on its introduction. You can search by yourself. I'm ma ...

1 code formatting The format of C language code needs to use clang format, which is integrated into llvm, so you need to install llvm first, Click here to download After downloading, run the installation file and add the bin directory to the environment variable path (restart the computer to make the newly added environment variable take ...

It's a week old article. It's not easy to be original. In the whole process of actual combat, let's give you a one click three connection (like, comment and collection). If you have any questions, you can leave a message at the end of the article for discussion, or send a private letter to me on CSDN. I'll reply to you when I see it. In additio ...

Etcd distributed lock is not a function api provided by etcd server, but a tool for integrating various features (lease, watch, mvcc, etc.) based on etcd.In the same process, in order to avoid data competition for shared variables, it can usually be avoided by locking and unlocking. However, if multiple processes operate on the same resource, o ...

Actual combat wsl2 0 arm cross tool chain - step pit cross compilation incompatibility environment Cross compiler: arm linux gnueabihf-4.9.4-2017.01-linaro is installed in VMware UBUNTU 18.04 x64 and WSL 2.0 UBUNTU 20.04 x64 (non docker environment). The installation package gcc-linaro-4.9.4-2017.01-x86 is downloaded from the official website ...

Please note before reading: 1. This learning note is the learning record of MATLAB training of HelloWorld programming Association of central China Normal University in 2021 winter vacation. It is a summary and expanded reading based on the training classroom content. The content of the blog is written and edited by @ K2SO4 potassium and publis ...

preface Heap sort is a sort method with time complexity of O(nlgn). The data structure "heap" is used. This article will answer what is "heap"? How to sort with "heap"? Binary reactor First, let's answer what is "heap". Heap is usually an array object that can be regarded as a complete binary tree. It ...

springboot e-commerce project mall4j( https://gitee.com/gz-yami/mall4j) java open source mall system Environment: jdk1 eight System: window/linux fastjson version: 1.2.29 Key codes: public class FastJsonUtil { /* * Convert pojo object to json string, and change hump naming to underline naming */ public static String buil ...

preface Early methods for image rotation were: cv2.imread() reads the imagenumpy rotating imageSave the rotated image CV2 Imwrite() and read the image again Because of the basic operation of images, I am a little white and have never touched anything. Therefore, the early idea is like this. This method is simple and clear, but ...

1, Introduction 1 past and present life of Haar classifier Face detection belongs to the category of computer vision. In the early stage, people's main research direction was face recognition, that is, to recognize the identity of people according to the face. Later, the demand for face detection in complex background is increasing, and face ...