On Thu, Dec 12, 2002 at 09:39:18PM -0500, James Mastros wrote:
> On 12/12/2002 8:07 PM, Larry Wall wrote:
> > Ordinarily you'd test for subs with one of
> >
> > exists &Main::foo
> > &Main::foo.exists
> I thought that was now spelt exists %Main::{&foo} -- that the symbol
> tables were now just plain hashes? (And what's the methody syntax for
> testing for hashkey existance -- %hash{key}.exists should get the key
> element of hash, then run it's exists method, logicly. Is it
> %hash.exists('key')?
>
> > I suppose one could set up a transactional structure in which "can"
> > actually does the side effects hypothetically, with the option of
> > committing later. Sort of what a "try" block would like to be when
> > it grows up...
> Or hypothetical variables in a non-regex context...
>
> -=- James Mastros
Or this:
http://search.cpan.org/src/SIMONW/Whatif-1.01/README
--Dks
