[JavaScript] Pass a defined function as a parameter

Question

Hello,

I am trying to pass in a function as a parameter:

GEvent.addListener(marker_1, "click", populateMarkerWindow(0, marker_1) );

the addListener function takes an inline function as a parameter, and it works fine, but I want to call this function from other places as well, so I made it into a defined function:

var populateMarkerWindow = function(id, marker) {
  //...
}

This, however, only means that my function gets called when I try to register it.

Is there a way to tell JS that I want to pass in the function itself, not the result of the call to the function?

Thank you,

Answer 1

Just pass the function's name. If you need to arrange for the function to be invoked with a particular set of parameters, well, there are fancy ways to do that, but the simplest thing is to just wrap a call to your function in another function.

GEvent.addListener(marker_1, "click", function() {
  populateMarkerWindow(0, marker_1);
});

You might want to look for Douglas Crockford's various lectures on YouTube, as well as his website (crockford.com I think). In addition to that there are approx. a zillion other Javascript introductions out there.