marionette.application singleton pattern

singleton.js

// usage:
// var app = require('singleton');
define(function(require) {
  var Marionette = require('backbone.marionette');

  // static instance of a Marionette.Application
  var app = null;

  // singleton function 
  function getSingleton() {
    if (app === null) {
      app = new Marionette.Application(); 
    } 

    return app;
  }

  // the app/singleton module returns the results of the singleton function
  return getSingleton();
});