how to check node js version

This article mainly introduces node. emitter in js. the usage of the on method is described in this article. on Method description, syntax, receive parameters, use instances and implementation source code. For more information, see Method description: Registers a listener for a specified event. Syntax: The Code is as follows: Emitter. on (event, listener)Emitter. addListener (event, listener) Receiving

. view the package. json folder of the node module npm view moduleNames 3. view the installed node packages in the current directory npm list 4. View help commands npm help 5. view the package dependency npm view moudleName dependencies 6. view the package source file address npm view moduleName repository.url 7. view the Node

After you install node. js, choose a beneficial IDE for your development.After comparing multiple Ides, it is positioned on webstrom and sublime.There is a simple comparison:Webstorm feature is very rich, the front-end development tool of the synthesizer, compared to sublime slightly heavierSublime plug-in is also very rich, the interface is more beautiful, very light, also has a simple project management f

;/** Detect the popular CommonJS extension 'module. export '*/Var moduleExports = freeModule freeModule. exports === freeExports freeExports;/*--------------------------------------------------------------------------*/// Expose Lo-DashVar _ = runInContext ();// Some AMD build optimizers, like r. js, check for condition patterns like the following:If (typeof define = 'function' typeof define. amd = 'obje

Three Node. js code optimization methods you have not known, and three node. js codes are unknown. The running of Node. js programs may be limited by the CPU or input/output operations, but it is very slow. From the CPU perspectiv

Node. js event-driven, node. js event Node. js event-driven implementation Overview Although the ECMAScript standard does not (and is not necessary) specify "Events", in the browser, Events Act as an extremely important mechanism,

install node Or: Sudo aptitude update Sudo aptitude install node Node. js will be added to the sources source list in the sid library. Sudo echo deb http://ftp.us.debian org/debian/sid main>/etc/apt/sources. list. d/sid. list Note that after installation, you need to remove/etc/apt/sources. list. d/sid. list. To insta

Node. js blog instance (5) Editing and deletion functions, node. js instance Original tutorial. Now, you can edit or delete an article for a blog. When a user is online, he or she is allowed to edit or delete only the published article pages. When editing, he or she can only edit the article content, not the title of t

This article describes how to use node + vue. js to implement SPA applications. For more information, see Business Requirements Recently, the company asked to develop a web version of the app. Because the app is content-oriented and has a chat module, it is not suitable for multi-page development, and it is mainly for mobile browsing, it is harsh for loading spe

This article mainly introduces how to use Node. js to implement content sharding in HTTP206. Node. js is a JavaScript framework for servers. For more information, see Introduction In this article, I will describe the basic concept of HTTP status 206, and use Node.

This article mainly introduces Node. callback and code design patterns in js asynchronous programming. Although long string parentheses during callback writing are not very nice in most cases, Node's asynchronous performance is indeed good, for more information, see the event mechanism and asynchronous IO, the biggest selling point of NodeJS, which is not transparent to developers. Developers need to write

(req, res) {// if you send a GET request to 127.0.0.1: 1337/test? Var url_info = require ('url') If a = 1 B = 2 '). parse (req. url, true); // check whether requestif (url_info.pathname = '/test') for/test {// use url encode for query, in this way, you can use post to send var post_data = require ('querystring '). stringify (url_info.query); // optionvar post_options of post = {host: 'localhost', port: 1337, path: '/response_logic', method: 'post',

Node. js entry-create a project and explain it in detail. node. js entry-level After thinking for a long time, I always want to write something that is helpful to everyone. Today I will explain how to generate a project. At present, the market generally requires a full stack of people ----- mean (mongo, express, angula

record. join (',') ;}); var data = fs. createReadStream ('. /demo.csv '); data. pipe (parser ). pipe (transformer) // process the data transmitted from the previous stream. pipe (es. map (function (data, callback) {up Load (data, function (err) {callback (err) ;}) // listens to the end event of the previous stream. pipe (es. wait (function (err, body) {process. stdout. write ('done! ');})); More Methods You can refer to the https://github.com/jeresig/node