[Bioperl-l] Bio::DB::Query::GenBank errors

[Rob Edwards]

eval should catch the error.


eval {$count=$queryobject->count};
if ($@) {
   print "No results returned"
}

Rob


On Jun 28, 2004, at 12:15 PM, Jonathan Manning wrote:

> Hi all,
>
> Apologies for the somewhat fundamental question, but I haven't been 
> able
> to find answers myself, and it should be a quickie.
>
> How do I tell if a Bio::DB::Query::Genbank has not retrieved any 
> results
> without calling any methods (since this causes the script to crash out
> with an exception if there's no results).
>
> Since count() or ids() are unavailable for the purpose I tried:
>
> - if ($queryobject)
> - if (ref($queryobject))
> - if (defined($queryobject))
>
> (I realise I was clutching at straws a bit there), but to no avail.
>
> Help appreciated!
>
> Jon
>
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