use Encode qw( encode );

open(my $fh, '>:raw', $qfn)
   or die("Can't create \"$qfn\": $!\n");

print($fh join("\x01", map encode($encoding, $_), @values));

##</code><code>##

use open ':encoding(UTF-8)';

open(my $fh, '>', $qfn)
   or die("Can't create \"$qfn\": $!\n");

print($fh join("\x01", @values);

##</code><code>##

use open ':encoding(UTF-8)';

open(my $fh, '>', $qfn)
   or die("Can't create \"$qfn\": $!\n");

print($fh "$_\x01") for @values;

##</code><code>##

use open ':encoding(UTF-8)';

open(my $fh, '>', $qfn)
   or die("Can't create \"$qfn\": $!\n");

local $\ = "\x01";
print($fh $_) for @values;