P:\test>perl -MData::Dumper -anF"\|" -le"$f{shift@F}=[@F[1..$#F]]}{print Dumper \%f" pipe.txt
$VAR1 = {
          '6' => [
                   'foo',
                   'bar',
                   'bax'
                 ],
          '3' => [
                   'foo',
                   'bar',
                   'bax'
                 ],
          '7' => [
                   'foo',
                   'bar',
                   'bax'
                 ],
          '9' => [
                   'foo',
                   'bar',
                   'bax'
                 ],
          '2' => [
                   'foo',
                   'bar',
                   'bax'
                 ],
          '8' => [
                   'foo',
                   'bar',
                   'bax'
                 ],
          '1' => [
                   'foo',
                   'bar',
                   'bax'
                 ],
          '4' => [
                   'foo',
                   'bar',
                   'bax'
                 ],
          '10' => [
                    'foo',
                    'bar',
                    'bax'
                  ],
          '5' => [
                   'foo',
                   'bar',
                   'bax'
                 ]
        };