Simple event aggregator

eventaggregator.js

var EventAggregator = function() {
	this._events = {};
};

EventAggregator.prototype.trigger = function (msg) {
	var args = Array.prototype.splice.call(arguments, 1);
	for (var i = 0, len = (this._events[msg] || []).length; i < len; i++) {
		this._events[msg][i].apply(this, args);
	}
};

EventAggregator.prototype.on = function (msg, func) {
	this._events[msg] = this._events[msg] || [];
	this._events[msg].push(func);
};

EventAggregator.prototype.off = function (msg, func) {
	if (func == null) {
		this._events[msg] = [];
	} else {
		for (var i = 0, len = (this._events[msg] || []).length; i < len; i++) {
			if (this._events[msg][i] === func) {
				this._events[msg].splice(i, 1);
			}
		}
	}
};

module.exports = new EventAggregator();