Publish/Subscribe implementation

emitter.js

var _listeners = {};
	
function on() {
	var args = [].slice.call(arguments);
	var ev = args[0],
		fn = args[1],
		scope = args[2];

	_listeners[ev] = _listeners[ev] || [];
	_listeners[ev].push({ fn : fn, scope : scope });
}

function emit() {
	var args = [].slice.call(arguments);
	var ev = args[0],
		props = args.slice(1);

	if (!(ev in _listeners)) return;

	for (var i in _listeners[ev]) {
		var listener = _listeners[ev][i];
		listener.fn.apply(listener.scope, props);
	}
}

module.exports = {
	on: on,
	emit: emit
};