On Mon, Mar 31, 2003 at 01:47:25AM +0800, Autrijus Tang wrote:
> On Sun, Mar 30, 2003 at 07:22:48PM +0200, [EMAIL PROTECTED] wrote:
> > In my opinion, again is more perlish. Especially because of its
> > pragma-like name (compare C<use if>, C<use only>, C<use again>).
> It is also confusing:
> use Module::Name;
> use again 'Module::Name';
> If I know nothing about your module, I'd expect line two to reload
> Module::Name unconditionally. But maybe it's just me. Arthur?
As the POD says, C<< use again 'Module::Name' >> loads Module::Name if:
- it has not been loaded with C<use again> before
... or ...
- it has been changed since the last time C<use again> loaded it.
Missing in the POD is that C<< use again 'Module::Name' >> is equivalent
to:
BEGIN {
require_again 'Module::Name';
Module::Name->import() if Module::Name->can('import');
}
Just like how C<< use Module::Name >> is equivalent to:
BEGIN {
require Module::Name;
Module::Name->import() if Module::Name->can('import');
}
__
'again' can indeed be confusing, but
'if_not_loaded_before_or_changed_since_last_use' simply is too long :)
The POD explains what it does in detail.
(And if even that is not detailed enough, feel free to read its source.
It's very readable and simple)
Juerd
