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var p = async(data);
p.done(function(response){
  // do task 1
});

p.done(function(response){
  // do task 2
});

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var t1 = Event.subscribe('asyncOp',function(data){
  //Listener for the data that comes in
  // when the event happens.
});

async(data, function(response){
  Event.dispatch('asyncOp',response);
});

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/** 
 * asynchronousCall function
 * @param data - input data
 * @return promise object- It will resolve with `response` data
 * or fail with `error` object
 */

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/** 
 * asynchronousCall function
 * @param data - input data 
 * @param success callback. Should accept `response` parameter 
 * @param failure callback. Should accept `error` parameter 
 * @return void 
 */ 

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asyncCall(data,function(response){
  // You have response from your asynchronous call here.
}, function(err){
  // if the async call fails, the error callback is invoked
});

// And now with Promises pattern, you would write it like this:

var promise = asyncCall(data);

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// @author: Rajat Mittal

/**
 * Sample Model Constructor
 * @param {Object} fields
 */
var Model = function(fields){
	this._fields = fields;
	/**
	 * NOTICE how we dropped the internal array _listeners

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/**
 * Extremely naiive implementation of Observer pattern
 * Its used to illustrate the concept and to basically show
 * How its done. This is not production level code.
 * @author: Rajat Mittal
 */

/**
 * Sample Model Constructor
 * @param {Object} fields

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//his own object literal
var $externalLib_Proto = {};
// aliasing your library to his object
myFunkyLibrary.call($externalLib_Proto);
//calling your library
$externalLib_Proto.fn();

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var myFunkyLibrary = function(){
 var _prop1 = ''; // this property turned private. woozahh!
 //function meant for internal usage. This is truly private now.
 var _fn2 = function(){};

 this.prop2 = 'some value here'; // a public property.
 this.fn = function(){};   //public function of the library
};

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var myFunkyLibrary = (function(){
 var _prop1 = ''; // this property turned private. woozahh!
 //function meant for internal usage. This is truly private now.
 var _fn2 = function(){};
 return {
   prop2 : 'some value here',  //public property
   fn = function(){} //public function of the library
 };
})();