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my $parts = [ 'Part1', 'Part2','Part3' ]; my $newLoop = [ grep { $_->{SELECTED}++ if $_->{PARTNAME} eq $row->{title}, $_ } map +{ 'PARTNAME' => $_ }, @$parts ] ;
for (@$parts) { my $hash = { PARTNAME => $_ }; ... push @$newLoop, $hash; }