I stuck your test data into a structure purely for an
example. Concentrate on the loops and the format/write. Fill in your own logic for setting $accession, $item1 and $item2.
my %accession =
(
'1223455' => [ { item1 => 'abdkek', item2 => 'akdjeg' },
{ item1 => 'ksitjls', item2 => 'jsoirl' },
{ item1 => 'lsiet', item2 => 'oliut' } ],
'2874824' => [ { item1 => 'lsiugl', item2 => 'potpsgj' },
{ item1 => 'postis', item2 => 'potltids' } ],
'1375080' => [ ],
'0875709' => [ { item1 => 'llskgjo', item2 => 'ooiwuto' } ],
'9876653' => [ { item1 => 'lsgjgdlk', item2 => 'ldkgjldj' } ]
);
my ($accession, $item1, $item2);
foreach $accession (sort keys %accession)
{
#....
if (not scalar @{$accession{$accession}}) # no items
{
$item1 = $item2 = '';
write;
next;
}
foreach my $itemset (@{$accession{$accession}})
{
# Do whatever you want to set $item1, $item2
$item1 = $itemset->{item1};
$item2 = $itemset->{item2};
write;
$accession = ''; # blank for subsequent prints
}
}
format STDOUT_TOP =
Accession item1 item2
.
format STDOUT =
@<<<<<<<<<<<<< @<<<<<<<<<< @<<<<<<<<<
$accession, $item1, $item2
.
