node.js

Take a look of advantages

JavaScript

Using JavaScript on a web server
as well as the browser

No data validation between
server and client

People already know it

JavaScript

Event-driven development

Node.js uses an event-driven, non-blocking I/O model, which makes it lightweight.

Async code

No multithreading, deadlocks, etc.

Node.js keeps a single thread
for your code...

Event-driven development

Extremily fast

V8 Google Engine

Optimized for hight concurrent
environments.

Extremily fast

npm

Huge community with tons
of great libraries

Warning!
CONS

Five versions of everything

npm

How to install?

Ubuntu

Setup with Ubuntu:

curl --silent --location
https://deb.nodesource.com/setup_4.x
 | sudo bash -

Then install

sudo apt-get install --yes nodejs

Fedora

Official Fedora Node.js and npm packages are available in Fedora 18 and later. Install with:

sudo yum install nodejs npm

Windows

How to install?

npm must-have modules

Asynchronous Pattern Module

Step

Futures

Async

Web Framework

Express

jQuery

Bootstrap

Testing

JSHint

Mocha

Vows

npm must-have modules

Install package global

npm install http-server -g

Install package local

npm install http-server

Examples

Command promt
echo

for(i = 2; i < process.argv.length; i++){
  process.stdout.write(process.argv[i]);
  process.stdout.write(" ");
}
process.stdout.write('\n');

Asynchronous

var results = [];
setTimeout(function() {
  console.log("Task 1");
  results[0] = 1;
  setTimeout(function() {
    console.log("Task 2");
    results[1] = 2;
    setTimeout(function() {
      console.log("Task 3");
      results[2] = 3;
    }, 10000);
  }, 800);
}, 100);

HTTP Server

// Include http module.
var http = require("http");
// Create the server.
http.createServer(function(request, response) {
  // Write headers to the response.
  response.writeHead(200, {"Content-Type": "text/plain"});
  response.write("Hello World from server");
  //End of response
  response.end();
}).listen(8888);

File I/O

var http = require("http"),
// And file system module
fs = require("fs");
http.createServer(function (request, response) {
	// Check if user requests /
	if (request.url == '/') {
		// Read the file.
		fs.readFile('test.txt', 'utf-8', function (error, data) {
			// Write headers.
			response.writeHead(200, {
				'Content-Type': 'text/plain'
			});
			// Increment the number obtained from file.
			data = parseInt(data) + 1;
			// Write incremented number to file.
			fs.writeFile('test.txt', data);
			// End response with some nice message.
			response.end('This page was refreshed ' + data +
       ' times!');
		});
	} else {
		// Indicate that requested file was not found.
		response.writeHead(404);
		// And end request without sending any data.
		response.end();
	}
}).listen(8888);

Examples

Questions?

Overview