Help for this page
@union = ((SDT,`1781183799.44927\',-----), ... @ICUNAV = ((BN,`1781183799.44972\',-----), (BNN,`1781183799.46753\',-----),(SFG,`1781183799.46753\',-----));
@diff = ((SDT,`1781183799.44927\',-----), (SFG,`1781183799.46753\',-----));
my @diff; my @inter; ... push @{ $count2{$element} > 1 ? \@inter : \@diff }, $element; }; print Dumper(@diff),"\n";