How to code laravel4

For those who don't know. These ways of code are equivalent.

//Facade
Route::get('/', function() {
    return View::make('hello');
 });

 //Function
 app('router')->get('/', function() {
     return app('view')->make('hello');
 }); 

 //Array
 $app['router ']->get('/', function() use ($app) {
     return $app['view']->make('hello');
 });