kshirish

var EventEmitter = require('events').EventEmitter
,	util = require('util')
;

function Animal(){
	this.nose = 2;
	this.ear = 4;
}

util.inherits(Animal, EventEmitter);

kshirish

var http = require('http');

// list all status codes 
http.STATUS_CODES

var server = http.createServer(function(req, res){
		// get header info
		console.log(req.headers);
		
		//get method

kshirish

// writes to stdout, same as info
console.log('hello %d', 2015);
//writes to stderr, same as warn
console.error('hello %d', 2015);

console.dir({
	name: 'John doe',
	address: {
    	city: 'NY',
    	state: 'DC'

kshirish

// global object 
console.log(process);

process.on('uncaughtException', function(err) {
  console.log('Caught exception: ' + err);
});

setTimeout(function() {
  console.log('This will still run.');
}, 500);

kshirish

var url = require('url');
var str = 'http://user:pass@host.com:8080/p/a/t/h?query=string#hash';

// parse and format
var obj = url.parse(str,true);
console.log(url.format(obj));

// resolve the browser will do 
console.log(url.resolve('http://www.google.com/users','user'));

kshirish

// all of exposed methods in os
// are basically informations about OS

var os = require('os');

//console.log(os);

console.log(os.platform());
console.log(os.arch());
console.log(os.type());

kshirish

// Careful with arrays
function Class(){
	this.array = [];
}

Class.prototype.anotherArray = [];

var obj = new Class();
var anotherObj = new Class(); 

kshirish

// immutable strings
var person = 'xyz';
var anotherPerson = person;

person = 'abc';
console.log(person);
console.log(anotherPerson);

// functions and other variables
var fun = function(){

kshirish

//////////////////////////////////////Server////////////////////////////////////////

var WebSocketServer = require("ws").Server;
var http = require("http");
var express = require("express");
var app = express();
var port = process.env.PORT || 5000;

var server = http.createServer(app);
server.listen(port);