Apache – Advanrtages of Flex3 over Flex 2

The second type of casting has different behaviour for top level(http://livedocs.adobe.com/flex/2/langref/) types, e.g. Array(obj) does not cast in the straightforward way you describe; it creates a new Array if possible from obj, even if obj is an Array.

I'm sure the times this would cause unexpected behaviour would be rare but I always use "as" for this reason. It means if I do

int(str) 

I know it's a cast in the "attempt to convert" sense of the word not in the "I promise it is" sense.

ref: got some confirmation on this from http://raghuonflex.wordpress.com/2007/07/27/casting-vs-the-as-operator/

The ViewStack and States actually aren't really related. Can you rephrase to make your question more specific?

The ViewStack is a component that is used to display different views (normally of different data, but not necessarily), one at a time.

States are related views of a single set of data. For example, you may want to have a 'normal' view and an 'advanced' view of, say, a user's profile - where the advanced view displays more options, or a larger picture, etc.

States work with Transitions, which are coordinated animations that elegantly switch between states.

That's a real brief explanation. Hope it's useful.