Javascript - namespace/module example

Method1: (This is what I found in an example)
--------
var SILLY = (function (module) {
      
      module.DoIt = function (resultObject) {
          resultObject.prepend(Date() + '
');
      };
      
      return module;
    } (SILLY || {});     // "{}" means "new Object()". It is a shortcut

NOTE: The last line could be :  (SILLY || {}) => (SILLY || (new Object())));
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Method2: (This is how we would write the above code in C#/Java style)
---------
        
var SILLY = (function() {
          
   if (SILLY === undefined) {
      var SILLY = new Object();
      SILLY.DoIt = function (resultObject) {
         resultObject.prepend(Date() + '<br >');
      };
   }
   return SILLY;    
}());

jsbin link for full example - http://jsbin.com/ahuqow/1/edit