Programmer Group

I. Basic overview of Websocket WebSocket protocol is a new network protocol based on TCP. It realizes full-duplex communication between browser and server - allowing server to send information to client actively. Why do we need WebSocket?Defect: HTTP communication can only be initiated by the client WebSocket features: Based on TCP Protocol Pe ...

Judge whether a 9x9 Sudoku is valid. Just verify the validity of the number that has been filled in according to the following rules. Numbers 1-9 can only appear once per line. Numbers 1-9 can only appear once in each column. Numbers 1-9 can only appear once in each 3x3 uterus separated by a thick l ...

Rectangle Painting 2 There is a square grid of size n×n. Some cells are colored in black, all others are colored in white. In one operation you can select some rectangle and color all its cells in white. It costs min(h,w) to color a rectangle of size h×w. You are to make all cells white for minimum tot ...

Voice network is a video and audio chat tool. Because the official network only provides C++DLL, it can not be directly used in WPF programs. In order to facilitate the use of developers, I am further encapsulating the voice network DLL, encapsulating it into its own interface, and at the same time facilitating c# calls. In the first step, agor ...

Setting up DNS separate parsing can provide different domain name parsing records for different clients. When a client from different addresses requests the same domain name, it provides different parsing results. Install the bind package [root@localhost ~]# yum install bind bind-utils -y Dual Network Card Configuration Both network cards ar ...

Scoring and Feedback After purchasing the content, you can score it by adding information to the comments. METHODS: leave_rating_and_comment-Score and comment on content void leave_rating_and_comment(string consumer, string URI, uint64_t rat ...

Given a matrix containing m x n elements (m rows, n columns), return all elements in the matrix in a clockwise spiral order. Example 1: Input: [ [ 1, 2, 3 ], [ 4, 5, 6 ], [ 7, 8, 9 ] ] Output: [1, 2, 3, 6, 9, 8, 7, 4, 5] Example 2: Input: [ [1, 2, 3, 4], [5, 6, 7, 8], [9,10,11,12] ] Output: ...

Today we will install and test the multi-concurrent and high-performance network communication extension of php. This extension is developed by using C voice. After loading into PHP, it realizes multi-concurrent and asynchronous communication at the level of PHP. It simulates many characteristics of go voice and greatly broadens the application ...

Java's network concept is not distinguished by the host, but by the process. JVM helps to solve the network transmission without our consideration. Although JVM helps users hide the original information of the network, some operations are left to users. There are two kinds of network connections: TCP ...

Preface Now there are many examples of using Netty to build RPC framework on the Internet. Why do I write an article here to discuss it? I know very well that I may not have written them so well. There are two reasons why we should write about it: First, because after learning Netty, we need to practice constantly to better grasp the use of Ne ...