On Wed, 26 Jul 2006 18:26:49 -0400, Tristan Fiedler wrote:

> Hello All,
> 
> I posted the following on PerlMonks but have not found a solution.  
> Could someone please comment on solutions to the following error. I am 
> using the Library of Congress driver to look up book info based on ISBN 
> numbers. I am not clear on how to combine the driver pm file with the 
> script, etc.  I have also tested several other Driver files.
> 
> use WWW::Scraper::ISBN::Driver;
> use WWW::Scraper::ISBN::LOC_Driver;
> $driver = WWW::Scraper::ISBN::LOC_Driver->new();
> $driver->search("0764516965");
> $driver->verbosity(1);
> my $book = $driver->book();
> print $book('title');

That line should be:

  print $book->{title};

You should also be checking to see whether the search was successful.

> print $driver->error;
> 
> and here is the result :
> 
> Can't use an undefined value as a symbol reference at isbn_lookup2.pl 
> +line 9.  {the 'title' line}


-- 
Peter Scott
http://www.perlmedic.com/
http://www.perldebugged.com/


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