No, you get it all wrong.
Callbacks you use for `for-loops` (array.forEach() I guess) are not async
at all.
The forEach() method is actually nothing but:
// simplified
Array.prototype.forEach = function (cb) {
for (var i = 0; i < this.length; i++) {
cb(this[i])
}
}
So it just performs iterating stuff for you and frees your hands from
bothering with for loop.
I strongly recommend you to stop writing any code and read good book about
javaScript and
functional programming in general.
On Wednesday, April 10, 2013 2:02:44 AM UTC+4, Mil Werns wrote:
>
> I have a simple question: When should I use callbacks?
>
> Currently, I'm only using callbacks in I/O cases (file, database and
> network access).
> My application has to iterate over a lot of big arrays and combines this
> data to new objects. I'm doing this with a standard (synchronous) for-loop,
> because this task needs only CPU power. So there would be no benefit to use
> an asynchronous call.
>
> Is this assumption correct?
> Can you please give me other examples for useful callbacks other than
> those mentioned above?
>
> Thank you
>
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