On Mon, Mar 23, 2009 at 09:53, igotux igotux <igo...@gmail.com> wrote:
> Hi Team,
>
> Can someone explain what is wrong happeneing here ?
>
> $ perl -e 'use Business::ISBN; $isbn_object = new
> Business::ISBN('0-59610-206-2');print $isbn->as_string;'
> Can't call method "as_string" on an undefined value at -e line 1.
> $
Two reasons, first you are using single quotes inside of a single
quoted string in the shell causing a problem in what gets passed to
perl and second you are storing the object in $isbn_object and then
trying to call the as_string method on $isbn. Try this:
#!/usr/bin/perl
use strict;
use warnings;
use Business::ISBN;
my $data = "0-59610-206-2";
my $isbn = Business::ISBN->new($data);
unless ($isbn->is_valid) {
print "$data is not valid because ",
$Business::ISBN::ERROR_TEXT{$isbn->error}, "\n";
}
print $isbn->as_string, "\n";
--
Chas. Owens
wonkden.net
The most important skill a programmer can have is the ability to read.
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