my %application;  # <-- Hash!

print "Application = ", $data[$application_pos], "\n";
if ( $data[$application_pos] ne "" && $data[$ip_address_pos] ne "" ) {
    my $key = $data[$application_pos];
    push @{ $application{$key} }, $data[$ip_address_pos];  # Pushing to a HoA.
    print Dumper( \%application ) ;
}


##</code><code>##

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,