On Sun, 2 Jan 2005, Siegfried Heintze wrote:
> I am posting this query in beginners instead of beginners-cgi because I
> believe this is a question about the defined statement and not the $q->param
> statement/function.
>
> I'm using this code:
> $q = new CGI;
> my $nUserId = $q-
Chris Devers wrote:
On Sun, 2 Jan 2005, Siegfried Heintze wrote:
I am posting this query in beginners instead of beginners-cgi because I
believe this is a question about the defined statement and not the $q->param
statement/function.
I'm using this code:
$q = new CGI;
my $nUserId
Both Zero "0" and empty string " " are defined values in Perl, so if you
want to test for values other than zero or empty string; then try something
like thing:
if ($nUserId) { # so "0", 0 or " " will fail here
$juror_number = $nUserId;
} else {
die "No valid ID
ailto:[EMAIL PROTECTED]
Sent: Tuesday, January 04, 2005 12:48 PM
To: beginners@perl.org
Subject: RE: How does defined work?
Both Zero "0" and empty string " " are defined values in Perl, so if you
want to test for values other than zero or empty string; then try something
like thing:
Siegfried Heintze wrote:
How do I distinguish between no value and false? I thought defined was
supposed to do that.
defined is true if its defined and false if it is not defined
its defined if its been given a value that is defined as '' or 0..
Try this out, uncommenting the different my $foo's t
