inheriting event emitting

events.js

var events = require('events');
var util = require('util');

var Module = function(name) {
  events.EventEmitter.call(this);

  var self = this;

  self.name = name;

  self.start = function(){
    self.data(function(){
      self.ready();
    });
  }

  self.data = function(cb) {
    console.log('request data for module ' + self.name);
    setTimeout(function(){
      self.emit('data');
      cb();
    }, (100 * Math.floor(Math.random()*30)));
  }

  self.ready = function() {
    console.log('ready to render module ' + self.name);
    self.emit('ready');
  }
};
util.inherits(Module, events.EventEmitter);

var modules = [
  new Module('mod a'),
  new Module('mod b'),
  new Module('mod c'),
  new Module('mod d'),
  new Module('mod e'),
]

for (m in modules) {
  ready(m);
}

function ready(m){
  modules[m].on('ready', function() {
    console.log(modules[m].name + ' MODULE READY: ' +modules[m].name);
  });
}

for (m in modules) {
  modules[m].start();
}