On Sat, Apr 28, 2012 at 07:16:18AM -0700, sono...@fannullone.us wrote: > I'm having a problem with the following code: > > #!/usr/bin/perl > use strict; > use warnings; > > my $xtra = 'mail.example.com'; > > my $host = 'localhost' unless (defined ($xtra)); > > print $host; > > I get the message "Use of uninitialized value $host in print". Does > anyone know why this doesn't work? > Hi Marc
> my $host = 'localhost' unless (defined ($xtra)); Says the $host identifier will be assigned the value 'localhost' only if $extra is not defined. But $extra is defined as 'mail.example.com' so $host won't be. Thus you get the appropriate warning message. Regards Lesley -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
