Hi Steven,
   Thanks for the explanation.

   If you mean Moock's Essential Actionscript, I've had a read of that
section and AFAICS it doesn't mention a bug.

   The only real issue I know of in try/catch do with return is that
you shouldn't put a return in a finally clause, because finally gets
executed when processing completes and exits any try/catch block but
before (potentially) the function returns. It leads to a return path
that you might not expect.

  I completely agree that you should try to avoid using try/catch
instead of an 'if' statement - however the ReferenceError solution I
posted above is several magnitudes faster than generating then parsing
then searching through the XML result from describeType, and I felt it
worth the sacrifice. Sometimes you've got to throw elegance to the
wind and adopt practicality. However, in the end
Object.hasOwnProperty() was the solution, I was being stupid, and the
ReferenceError solution isn't needed; so it's academic. :-)

Ian

On Thu, Oct 30, 2008 at 2:21 AM, Steven Sacks <[EMAIL PROTECTED]> wrote:
> There's a bug if you return in a try or catch (maybe it's just catch).
>  Colin Moock mentions it in his AS3 book.  I personally think it's cleaner
> to return after a try catch because try catch is not an if else and really
> shouldn't be treated as such, but that might be because I have avoided
> returning inside them since I first started using them because of the bug.
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