Chapter08 Added

+function add(a,b) {
+	return a+b;
+}
+function sub(a,b) {
+	return a-b;
+}

+var Producer = require('./producer');  
+var producer = new Producer();
+
+producer.on('add', function(t) {  
+	  console.log('add:', t);
+});
+
+producer.start();
+
+// stop the clock 10 seconds after
+// setTimeout(function() {  
+//   clock.stop();
+//   }, 10e3)

+var inherits = require('util').inherits;  
+var EventEmitter = require('events').EventEmitter;
+
+
+var Producer = function () {  
+	  if (! (this instanceof Producer)) return new Producer();
+
+	  EventEmitter.call(this);
+}
+
+module.exports = Producer;

+var fs = require("fs");
+var searchString = "test";

+var events = require('events');
+var eventEmitter = new events.EventEmitter();
+var connectHandler = function connected() {
+     console.log('connection successful.');
+     eventEmitter.emit('data_received');
+}
+
+eventEmitter.on('connection', connectHandler);
+
+eventEmitter.on('data_received', function(){
+    console.log('data received successfully.');
+});
+
+eventEmitter.emit('connection');
+console.log("Program Ended.");

+var events = require('events');
+var eventEmitter = new events.EventEmitter();
+var listner1 = function listner1() {
+console.log('listner1 executed.');
+}
+var listner2 = function listner2() {
+console.log('listner2 executed.');
+}
+
+eventEmitter.addListener('connection', listner1);
+eventEmitter.on('connection', listner2);
+var eventListeners = require('events').EventEmitter.listenerCount(eventEmitter,'connection');
+console.log(eventListeners + " Listner(s) listening to connection event");
+
+eventEmitter.emit('connection');
+eventEmitter.removeListener('connection', listner1);
+console.log("Listner1 will not listen now.");
+
+eventEmitter.emit('connection');
+eventListeners = require('events').EventEmitter.listenerCount(eventEmitter,'connection');
+console.log(eventListeners + " Listner(s) listening to connection event");
+console.log("Program Ended.");

+
+var dt = require('./mymodule');
+
+console.log(dt.myDateTime());

+exports.myDateTime = function () {
+    return Date();
+};