On Aug 3, 2011 12:40 AM, "Brian Fraser" <frase...@gmail.com> wrote:
>
> On Wed, Aug 3, 2011 at 2:32 AM, terry peng <terry.p...@mail.ru> wrote:
>
> > I have forgot that, is there a //= operator in Perl?
> > which should do the same stuff as:
> >
> > unless (defined($foo) ) {
> > $foo = ...;
> > }
> >
> > Thanks.
> >
> >
> Yes.
>
> Now wasn't that simple? : ) It's the defined-or, and you can read more
about
> it on perlop[0]. Do be mindful that in ancient versions of Perl it's not
> available; If for whatever reason you are on one of those.. Please update?
>
> [0] http://perldoc.perl.org/perlop.html#C-style-Logical-Defined-Or
Debian stable ( <6 ) was 5.8, so if you're in a shop that uses debian and
likes to test that still might not be available to you.
