A sample to test the promise pattern

gistfile1.js

/**
1) doing things in sequence
$(btn).click(function(){
	getTwitterHandle(function(){
		getTweets(function(){
			
		});
	});
});

2) Doing it in parallel
var tweets, answers;
getTweets(function(result){
	tweets = result;
});
getAnswers(function(result){
	answers = result;
});

3) Keep track of errors using counters is even worse
**/



function $P(p){
  if (p instanceof $P) {
        return p;
    }else{
		this.cbs = [];
	}
}
$P.prototype.then = function(k,param) {
    this.cbs.push({ok: k,args:param });
    return this;
};
$P.prototype.resolve = function(){  
    var cbArr = this.cbs;
	for(var i=0; i<cbArr.length; i++){
		var cb = cbArr[i];
		cb.ok.call(this, cb.args);    
	}
};

function testPromise(){
	var p = new $P();
	setTimeout(function(){
		p.resolve();
	},5000);
	return p;
}
function test1(args){	
	console.log("test1:"+args); 
}
function test2(args){	
	console.log("test2:"+args); 
}
function test3(args){	
	console.log("test3:"+args); 
}

var op1 = testPromise();
 

op1.then(test1,11).then(test2,12).then(test3,13);