Question

With following code:

var App = (function(param)
{
     return { foo : function() { alert(param); } }
})();

var d = App('test');
d.foo();

I get error message:

object is not a function

What am I doing wrong here?

Answer 1

The problem is,

var App = (function(param){})();

This means that as soon as the statement is encountered, App is set to {foo: function(){alert(param)}}, but param is undefined

Try

var App = function(param)
{
 return { foo : function() { alert(param); } }
};

var d = App('test');
d.foo();