Javascript function as a parameter to another function?

Question

I\'m learning lots of javascript these days, and one of the things I\'m not quite understanding is passing functions as parameters to other functions. I get the concept

Answer 1

You would do this if callerFunction wants to call doStuff later, or if it wants to call it several times.

The typical example of this usage is a callback function, where you pass a callback to a function like jQuery.ajax, which will then call your callback when something finishes (such as an AJAX request)

EDIT: To answer your comment:

function callFiveTimes(func) {
    for(var i = 0; i < 5; i++) {
        func(i);
    }
}

callFiveTimes(alert);  //Alerts numbers 0 through 4