javascript scoping - 3

gistfile1.js

/* #########################
 3 - SCOPE - Define a function in a closure, return an object that has access to that function.
*/
(function(){

  // accessible via the object we return
  var o = (function(){

    // local
    function _f(){ _log( 'danneh' ); }
    
    // public exports
    return {
      foo: _f
    };

  })();

  o.foo(); // works, and no-one can modify _foo
  _log( this._f ); // undefined
})();

_log( window._f ); // undefined