I would write this as: (UNTESTED)

for my $datastore (@{ $var->{'config.datastoreUrl'} }){
   print $datastore->{name}, " ", $datastore->{url},"\n";
}
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But a more official access method would be:

# Assumes you have a $vm object.
my $datastores = Vim::get_views(mo_ref_array => $vm->{'datastore'}, 
                           properties => ['name','url']);
foreach (@$datastores) {
     print "  " . $_->{'name'} . "\n";
}
[download]