Suppose there's an doc based app, class Document subclass from NSDocument and has a property of type NSArray.
ViewController is the document's windowController's contentViewController, and has a NSArrayController.
then how to bind the NSArraycontroller's content to the document's array?
I can do that by set doc's array to windowController in the makeWindowController func, and viewController then got that from the windowController, but is that too bother? someone please tell me if I'm doing it right or elegant?
