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var MYAPP = {};

(function(app) {
        var readyList, isReady = false;
        
        function readyEvent() {
            isReady = true;
            console.log( 'readyEvent started' );
            readyList.resolve();
        };
            
        function getPromise(obj) {
            if( !readyList ) {
                console.log( 'readyList created');
                readyList = $.Deferred();

                // If the object is in ready state, execute ready event
                if( this.isReady ) {
                    setTimeout(readyEvent);
                }
            }
            return readyList.promise(obj);
        }
        
        function start() {
            console.log( 'app started' );
            // start async stuff here
            // simulated with a setTimeout
            setTimeout(readyEvent, 3000);

        };
        
        jQuery.extend(app, {
            ready: function(fn){
                console.log( 'function added to list', fn);
                getPromise().done(fn);
            }
        });
        
        console.log( app, MYAPP);
        
        start();
        
}(MYAPP));

MYAPP.ready(function(){
        console.log( 'First function executed');
});

MYAPP.ready(function(){
        console.log( 'Second function executed');
});