On Thu, 2002-05-16 at 16:13, David Whipp wrote: > Aaron Sherman [mailto:[EMAIL PROTECTED]] wrote: > > You might not be able to REASONABLY get a length, so you return > > undef. In your documentation, you advise users not to take the length, > > but just dive right in and fetch the element you want, e.g.: > > > > my $pi2k = @pi_digits[2000]; > > In this case, I'd expect @pi_digits.length == Inf, not undef.
If I'm wrong about no proof existing for pi's infiniteness, I apologize. Pick your favorite series of discrete units n, where n may or may not be infinite, but where series[x] can be determined (though possibly at great cost) for all Perl-available positive integers, x. That aside, the point holds. Tied arrays which point to complex systems may not have a known length (even in Perl5). We know this.
