@testarray = {

           '_shards' => {
                          'skipped' => 0,
                          'successful' => 5,
                          'total' => 5,
                          'failed' => 0
                        },
           ...
         };


##</code><code>##

for my $hashref (@testarray) {
    for my $hit ( @{ $hashref->{hits}{hits} } ) {
        print "hit: '$hit->{_id}'\n";
        for my $key ( keys %{ $hit->{_source} } ) {
            my $val = $hit->{_source}{$key};
            print "key: '$key', val: '$val'\n";
        }
    }
}