Programmer Think

order I translated this article. The following is the translated article. The source of the article is: https://blog.packagecloud.io/yum-repository-internals/ abstract By testing the metadata in the yum warehouse (metadata < some index files >), this article deeply understands the internal structure of the yum warehouse. I will introdu ...

I. overview Several concepts in HTTP network requestSend HTTP request in IOSHTTP request example II. Several concepts in HTTP network request 2.1 URL What is a URL The full name of URL is Uniform Resource LocatorThrough one URL, you can find the only resource on the InternetURL is the address and location of resources. Each resource on t ...

Hello, everyone. I'm xy???. It has been a year since I first came into contact with vue3 version. Due to vue3 With the release of version 2, the experimental mark of < script setup > has been removed, and many companies have started to use vue3 2 development project. This article is to help you how to quickly use vue3 x. typeScript, vite ...

Learning is done preface Q: an Activity implements onClickListener. At this time, a Button uses setOnClickListener(this) Why is there no memory leak? A: because the View reference object will be released when the Activity is destroyed, there will be no memory leakage. Q: can you make it more detailed? Answer: Yes, Well, the window wi ...

Today, I write about the react project of the laboratory. One of the States is an array (be careful when you see that the state is an array. There are many pits!!!) After operating on the array, the page does not refresh. After repeated tossing, it is reduced to the following code: import React, { Component } from 'react' import { Table, Tag, ...

FFmpeg is in libavcodec module, and avcodec is provided in the old version_ decode_ Video2() as video decoding function, avcodec_decode_audio4() as audio decoding function. Add avcodec in FFmpeg version 3.1_ send_ Packet() and avcodec_receive_frame() as audio and video decoding function. Later, avcodec was implemented in version 3.4_ decode_ Vi ...

Detailed explanation of JAVA multithreading (II) III Thread state 1. Five states 2. Thread method methodexplainsetPriority(int newPriority)Change the priority of a threadstatic void sleep(long millis)Hibernates the currently executing thread for the specified number of millisecondsvoid join()Wait for the thread to terminatestatic voi ...

This article has been included in the Python black magic manual v2 Version 1, online documents, please go to Python dark magic manual 2.0 document ​ Today we introduce a library decorator that has existed for ten years but is still not popular. It seems that few people know its existence. What can this library do for you? In fact, it is ver ...

1. Project requirements (1) Reader information management: including the functions of adding reader information and querying and modifying reader information. After logging in successfully, users can browse the information of all readers and retrieve the information of specific readers; At the same time, you can maintain the reader information, ...

background At present, there are various promotion addresses of products in various circles. Due to the long URL address, unsightly, inconvenient collection, release, dissemination and the limitation of the number of words of various posts, wechat and microblog are using short link technology. Recently, due to the use of three-party generat ...