Titanium "once" function

app.js

function once(component, eventName, callback) {
	if(component && component.addEventListener && eventName && callback) {
		var wrappedCallback = function(e) {
			component.removeEventListener(eventName, wrappedCallback);
			callback.call(component, e);
		};
		component.addEventListener(eventName, wrappedCallback);
	} else {
		Ti.API.error('"once" function illegal parameter');
	}
}