New kid on the block node.js
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Node.js, developed by Ryan Dahl in 2009, is a high-performance, server-side JavaScript framework that utilizes an event-driven, non-blocking I/O model for efficient handling of thousands of concurrent connections. It is built on Google's V8 JavaScript engine and offers easy scalability for network applications. The document also discusses the asynchronous programming model, the use of npm for package management, and provides examples of basic file operations and HTTP server creation.
![Node REPL
REPL : Read - Eval - Print - Loop
$ node
> a=[1,2,"3",'four',];
[ 1, 2, '3', 'four' ]
> a.forEach(function (v) {
... console.log(v);
... });
1
2
3
four
Undefined
> .exit](https://image.slidesharecdn.com/newkidontheblock-node-js23march2013-130325224028-phpapp02/85/New-kid-on-the-block-node-js-9-320.jpg)
![Node.js HTTP Server
var http = require("http");
http.createServer(function(req, res) {
req.on("end", function () {
res.writeHead(200, {'ContentType' : 'text/plain'});
res.end('Your IP is ' + (req.headers['xforwardedfor'] ||
req.connection.remoteAddress) + '!') });
}).listen(8080);
console.log("Server accepting request on http://127.0.0.1:8080");](https://image.slidesharecdn.com/newkidontheblock-node-js23march2013-130325224028-phpapp02/85/New-kid-on-the-block-node-js-10-320.jpg)
![Node.js HTTP Server
var http = require("http");
http.createServer(function(req, res) {
req.on("end", function () {
res.writeHead(200, {'ContentType' : 'text/plain'});
res.end('Your IP is ' + (req.headers['xforwardedfor'] ||
req.connection.remoteAddress) + '!') });
}).listen(8080);
console.log("Server accepting request on http://127.0.0.1:8080");](https://image.slidesharecdn.com/newkidontheblock-node-js23march2013-130325224028-phpapp02/85/New-kid-on-the-block-node-js-11-320.jpg)
New kid on the block node.js
- 1. New Kid On The Block – Node.js Joel Divekar GM – Information Systems, People Interactive (I) Pvt. Ltd. Open Source Conference, Pune 23rd March, 2013
- 2. Node.js was developed by Ryan Dhal in 2009 and the project is managed by Joyent
- 3. Node.js is ... Server side JavaScript Event Driven Asynchronous I/O Single Threaded Lightweight
- 4. Node.js ... High performance network application framework and can easily handle thousands of concurrent connections with minimum CPU / Memory Utilisation Built on top of Google's V8 JavaScript engine used in Chrome Easy to build scalable network servers
- 5. Node.js is similar to ... EventMachine in Ruby Twisted in Python
- 9. Node REPL REPL : Read - Eval - Print - Loop $ node > a=[1,2,"3",'four',]; [ 1, 2, '3', 'four' ] > a.forEach(function (v) { ... console.log(v); ... }); 1 2 3 four Undefined > .exit
- 10. Node.js HTTP Server var http = require("http"); http.createServer(function(req, res) { req.on("end", function () { res.writeHead(200, {'ContentType' : 'text/plain'}); res.end('Your IP is ' + (req.headers['xforwardedfor'] || req.connection.remoteAddress) + '!') }); }).listen(8080); console.log("Server accepting request on http://127.0.0.1:8080");
- 11. Node.js HTTP Server var http = require("http"); http.createServer(function(req, res) { req.on("end", function () { res.writeHead(200, {'ContentType' : 'text/plain'}); res.end('Your IP is ' + (req.headers['xforwardedfor'] || req.connection.remoteAddress) + '!') }); }).listen(8080); console.log("Server accepting request on http://127.0.0.1:8080");
- 12. npm npm is package manager for node.js, similar to RubyGems & Python easy_install npm install <module_name> Modules Express – MVC framework Socket.IO – Websocket Library
- 13. Who is using Node.js ...
- 14. Thanks a lot for your time … joel.divekar@gmail.com www.linkedin.com/in/joeldivekar joeldivekar.blogspot.com www.slideshare.net/JoelDivekar