Rob Coops wrote: > > *Randal wrote:* > *Perl doesn't have NULL. That'd be like saying "how do I make this pig > fly?". > It's a nonsense question. > * > I think this is a little to easy, perl does have a value that indicates that > a variable does not have any set value it is called: undef > In many other langueages like Java, Visual basic, C++, SQL, I thought even > in Pascal a value of NULL signifies that the variable does not have a set > value, it is not defined. Exactly what a value of 'undef' signifies in perl. > > Pigs do not fly that much is true even if you manage to throw them real high > they will not fly but just crash right back to earth, but perl does have a > way to indicate that a variable has no value set. > > I thik the thing that Randal was saying is that 'NULL' does not exist as a > value in perl but he left out the part that others have pointed out before > 'undef' has the same significance in perl as 'NULL' in other languages.
The 'null' value in both C and Java is a null reference, and can't be used in general to mean that a variable doesn't hold a value. As far as I know Visual Basic's use of null is the same as SQL's, and applies only to database operations. Rob -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] http://learn.perl.org/
