you could use the async library or similar.
other solution is to restructure your code:
var num1, num2, num3
function sum(){
if(num1 != null && num2 != null && num3 != null) return (num1 + num2) /
num3
}
Object1.retrieveNum1Async(sum);
Object2.retrieveNum2Async(sum);
Object3.retrieveNum3Async(sum);
waterfalls are easy to refactor, as well parallels with full sync on
completion like yours here.
Am Montag, 22. April 2013 21:54:50 UTC+2 schrieb Slobodan Blazeski:
>
> Hi All
>
> I'm looking for suggestions of how to retrieve values asynchronously:
>
> In the synchronous world I have
>
> var num1 = Object1.retrieveNum1();
> var num2 = Object2.retrieveNum2();
> var num3 = Object3.retrieveNum3();
>
> var result = (num1 + num2) / num3;
>
>
> but since functions Object1.retrieveNum1,Object2.retrieveNum2 &
> Object3.retrieveNum3
> retrieve data from the database or represent long calculation I need to
> pass callbacks,
> that leads me to below
>
> Object1.retrieveNum1Async(function(num1){
> Object2.retrieveNum2Async(function(num2){
> Object3.retrieveNum3Async(function(num3){
> var result = (num1 + num2) / num3;
> });
> });
> });
>
> is this the idiomatic way of doing this or there is something better
>
>
> thanks
> Bobi
>
>
>
>
>
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