addEventListenerOnce

app.js

var win = Ti.UI.createWindow({
	backgroundColor: 'white'
});

win.addEventListener('click', function foo(e) { // note the named function expression needed for the second way
	
	// oringal idea by @fukhaos
	// http://www.tidev.io/2014/09/10/the-case-against-ti-app-fireevent-2/#comment-13013
	e.source.removeEventListener(e.type, arguments.callee);
	
	// better - strict - one by @tonylukasavage
	// https://twitter.com/tonylukasavage/status/511887565100949505
	e.source.removeEventListener(e.type, foo);
	
	alert('I will only fire once!');	
});

win.open();

Aren't you missing the event type here?

addEventListener("open", ...

I've typically used this, which does the same thing effectively:

win.addEventListener("open", foo = function() {
   win.removeEventListener("open", foo);
});

Also did this in a baseController in Alloy for once firing triggers:

exports.once = function(trigger, callback) {
    $.on(trigger, on = function(e) {
        $.off(trigger, on);
        callback(e);
    });
};

which was handy way to make it reusable in controllers

@jasonkneen thx for the fix

The second one looks similar too Tony's. However, I like his more. Yours might be confusing as to in which scope the function variable is created don't you agree?

Nice one on the one. I hope Alloy will update BB soon so we have the new event API's including once.