best node js book

Command line arguments is often used to modify the behavior of a application or specify needed parameters for operation. In this lesson, you'll learn how to access the command line arguments passed to your node. JS application as well as dif Ferent strategies for evaluating and accessing them.To catch what arguement user passed on from command line, we can use 'process.argv '.If We log out:// Server.js Cons

The fs module of nodejs does not provide a copy method, but we can easily implement one. this method is to read all the file content into the memory and then write the file, this is not a big problem for small text files, such as grunt-file-copy. I. opening analysis Stream is an abstract interface implemented by many objects in Node. For example, a request to an HTTP server is a stream, and stdout is also a stream. Stream is readable, writable, or bo

The fs module of nodejs does not provide a copy method, but we can easily implement one. This method is to read all the file content into the memory and then write the file, this is not a big problem for small text files, such as grunt-file-copy. I. Opening Analysis Stream is an abstract interface implemented by many objects in Node. For example, a request to an HTTP server is a stream, and stdout is also a stream. Stream is readable, writable, or bo

This article will introduce you to the front-end and back-end of the practical node. js website, which is very detailed. If you need it, you can refer to what node. js can do? I still don't know where he is widely used, and I have no chance to access such a project. Just because I like it, I made a website and backgrou

Node. js obtains data from the database and node. js database. In this article, we need to use node. js as a small function to obtain data from Sqlserver and display the data on the page. Here we will share with you:App.

This article mainly introduces. the Redis method is used in js applications, and the simplest data read/write operations are related. if you need it, please ensure that Redis and Node are installed before you start this article. js and Node. redis extension of js -- node_red

Node. js emitter. emit method instructions, node. js Use Cases Method description: When an event is triggered, several optional parameters are passed to the parameter table of the event listener. Syntax: Copy codeThe Code is as follows:Emitter. emit (event, [arg1], [arg2], [...]) Receiving parameters: Event Type Arg1 ~

The console. time Method in node. js is used in node. js scenarios. Method description: Start Time, which corresponds to console. timeEnd and records the time period. Syntax: Copy codeThe Code is as follows:Console. time (label) Receiving parameters: The Label corresponds to the label of console. log at the start

The console. timeEnd method in node. js is used in node. js scenarios. Method description: Completion time: the time spent between console. time and console. timeEnd. Syntax: Copy codeThe Code is as follows:Console. timeEnd (label) Receiving parameters: The Label corresponds to the label of console. log at the st

This article mainly introduces node. the js [superAgent] request usage example summarizes the post request, get request, delete request, and put request examples, and recommends them to you. Post request: The code is as follows: Request. post ('/api/pet '). End (function (resp, err ){If (resp. body. status === 200 ){Alert ('Yay got '+ JSON. stringify (res. body ));} Else {Return next (resp. body );}}

This article describes how to create a web calculator using node. js + express. For more information, see Environment: Host: WIN10 Express installation: 1. install express-generator Enter the following command: npm install -g express-generator 2. install express Enter the following command: npm install -g express 3. verify whether the installation is successful Enter the command: express-V View help: e

Node. js Data Encryption Transmission Analysis, node. js Data Encryption Preface For encrypted data transmission, there are several methods that people often use. One is ciphertext transmission, and the other is ciphertext transmission. The other is to encrypt data using keys and decrypt data using public keys, the tra

Node. js removes BOM headers in batches and node. js removes bom My colleagues wrote a tool, but there is a bug that after the file is replaced, the format of the original file is changed to utf8 BOM. XML with BOM may not be readable on Mac, therefore, you need to write a tool for processing. In fact, the idea is rela

required for BT download and the settings for the Tracker server. The file information is generated based on the calculation of the target file, the calculation result is encoded according to the Bencode rules in the BitTorrent protocol. The main principle is to divide the downloaded files into equal blocks, which must be an integer of 2 K to the power of 2 k (because it is a virtual block, files are not generated on the hard disk), and the index information and Hash Verification Code of each b

//Not equalBuf1.compare (BUF3)0//Equalbuf1.equals (BUF2)false>>vararr =[Buf1, Buf2]>>Arr.sort (buffer.compare) [ ]>>Buf.tojson () {type:' Buffer ', data: [104, 101, 121, 101, 108]}>> buf =NewBuffer (' Hello world! ');>> buf2 0 Buf.slice (0,3) buf2.tostring ();' Hel 'In this lesson, we cover the node. JS Buffer object in detail. Not only would you learn that the buffer object was a reference to a memory spac

This article describes in detail the classification of node. js asynchronous programming and the problems existing in asynchronous programming, which are very detailed and meticulous. We recommend this article to our friends. Currently, a large number of asynchronous operations are required, and actual pages are more and more inclined to be single-page applications. Backbone, angular, knockout and other fra

Node. js crawls bean data instance analysis, node. js instance analysis I have always thought that my vue is okay, and I have always thought that my webpack is okay. Today, when I visited node in MOOC, I found that I am still far away. As we all know, vue-cli is based on web

This article mainly introduces the implementation of multi-process by child_process in Node. js. For more information, see The code is as follows: Var http = require ('http ');Function fib (n ){If (n Return 1;} Else {Return fib (n-2) + fib (n-1 );}}Var server = http. createServer (function (req, res ){Var num = parseInt (req. url. substring (1), 10 );Res. writeHead (200 );Res. end (fib (num) + "\ n ");});

This article mainly introduces the node. js game sharing that allows multiple users to move their mouse online at the same time. This article provides the server and client code and running methods. For more information, see the recent project requirements, so I studied the websocket Implementation of nodejs, socket. io, which is a widely used framework of nodejs background applications websocket. Preparat

This article mainly shares with you the node. js public platform development tutorial. If you are interested, please refer to it. How can nodejs be used to develop public platforms? Let's not talk about anything more. First, let's briefly introduce the basic principles of the public platform. The server is equivalent to a forwarding server. A terminal (such as a mobile phone or tablet) initiates a request