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UDP UDP is a network transport layer protocol. It is connectionless, unreliable and does not guarantee accurate data transmission, but it has high efficiency. Because UDP is a connectionless protocol, there is no one-to-one correspondence between the datagram socket on the client side and the datagram socket on the s ...

Preface Python as a scripting language, we can use it to do many things, such as data analysis, multimedia processing, web development, network programming, game programming, artificial intelligence and so on, which are widely used; if we use Python to develop commercial projects, we will inevitably encounter some idle people who always want to ...

Leetcode summary: Classic programming topic of leetcode (Java implementation) leetcode topic Combined sum III -- leetcode 216 Title Description Find out the combination of all k numbers whose sum is n. Only positive integers of 1 - 9 are allowed in a combination, and there are no duplic ...

Document practice question1 Batch modify file name import os dirName = os.path.realpath('xcx') dirList = os.listdir(dirName) for name in dirList: newName = '[Western open source]-' + name os.rename(dirName + '\\' + name, dirName + '\\' + newName) print("rename %s by%s " % (name, newName)) The results ...

I. why to use service registration to discover A scenario is proposed. Suppose that we have a service producer for the user's microservice, which provides a RESTful method to obtain the user through Id: @GetMapping("/{id}") public User findUserById(@PathVariable Long id){ User user = this.userMapper.findById(id); return user; } In add ...

Redux is a JavaScript state management container and an independent state management library, which can be used with other frameworks, such as React. Redux is introduced to make data management in JavaScript convenient and easy to trace, and avoid the confusion of data state in large-scale JavaScript applications. Redux tries to make the chang ...

[http://bdy.lqkweb.com] [http://www.swpan.cn] [reproduced from: http://www.lqkweb.com] Phantom JS virtual browser phantomjs is a web kit headless browser based on js, that is, a browser without display interface. With this software, you can get any information loaded by js, that is, the information loaded asynchronously by browser. Download web ...

springboot + wechat applet exchange codeid for openid 1. First, we need to go to wechat public platformhttps://mp.weixin.qq.com/ Prepared are appid (applet ID) and appsecret (applet key) 2. Start writing code when you are ready 3.controller @RestController public class GetOpenIdController { ...

Note: under Linux, you can see the details of each cpu in / proc/cpuinfo. But for a dual core cpu, you will see two CPUs in cpuinfo. It is often mistaken for two single core CPUs. Original address: http://www.hpboys.com/659.html I. linux CPU size [root@idc ~]# cat /proc/cpuinfo |grep "model name" && cat /proc/cpuinfo |grep "physical i ...

1. TFTP Introduction (understanding) TFTP: simple file transfer protocol With this protocol, you can simply download files. The TFTP port number is 69. TFTP introduction: When the data received by the client is 516 (2-byte opcode + 2-byte serial number + 512 byte data), it means that ...