Ovid asks: Wondering one thing, though: if a object is a subclass of CGI.pm. is it possible for it to not have the param() method? If so, I'll need to test for $cgi->can('param'). If it is possible to inherit from a module but not inherit all methods, how would that be done?

First I figured you could undef a subroutine:

package MyCGI;
use base CGI;
undef(*MyCGI::param);
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But then I realized that the subroutine wasn't defined in MyCGI, it was defined in CGI. So I don't think you can undef an inherited routine. But I'm not sure...

Update: would it be possible to (instead of using @ISA for inheritance) copy all of the subroutine refs from the parent class symbol table into your own and then delete one of them? I'll look into it...

Later: yes, you can copy from a superclass instead of using @ISA:

package A;
sub abc { "abc\n" };
sub def { "def\n" };

package B;
# inherit from A all but A::def
foreach my $symname (keys %A::) {
 next if $symname eq 'def';
 $B::{$symname} = $A::{$symname};
}
my $b = bless({}, 'B');
print $b->abc;    # prints "abc\n"
print $b->def;    # no such method
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