Thanks guys. But now I come up with one more question. Now I want to print all the lines sorted by the Town. Like this
Town Surname Firstname
Basel Chaplin Charlie
Manica Estevez Emilio Santa
Montmarte Sarte Jean Paul
Montmarte Rodin Paul
Amsterdam Rikard Frank
I did something like this:
my $data = "clients.dat";
open (DAT, $data) or die "\"$data\" not existed or can't be opened!\n"
+;
my @client; # make this an array, not a hash;
my @fields = qw/surname firstname town/;
while (<DAT>) {
next if ( /^Surname/ or /^-/ );
my @values = unpack 'A20A20A20', $_;
my %entry = map { $fields[$_] => $values[$_] } ( 0..$#fields );
push @client, \%entry;
}
my @towns;
my $client;
foreach my $client (@client){
push @towns, "$client->{'town'}";
}
my @sorted_towns = sort @towns;
foreach my $key (@sorted_towns) {
my @elems = $key;
my $client = $client->[$elems[1]-1];
print "$client->{'town'} $client->{'surname'} $client->{'firstname
+'}";
}
But this doesnt work somehow. Can anyone help please?
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