my $Hashref = $data[ $fileCount ];
if( not $Hashref){
    my %newHashThatIsOnlyNamedHere;
    $Hashref = $data[ $fileCount ] = \%newHashThatIsOnlyNamedHere;
}
my $key = shift @col;
my $Arrayref = $Hashref->{ $key };
if( not $Arrayref ){
    my @newArrayThatIsOnlyNamedHere;
    $Arrayref = $Hashref->{ $key } = \@newArrayThatIsOnlyNamedHere;
}
push @{ $Arrayref },  \@col;