Re: Perl sorting unique values

[Utilitarian]

If ever you find yourself thinking "I need to get the unique values of $THING" you should consider using a hash, iterating through the values for $F[2] and incrementing $hash_of_f2{$F[2]} would give you a set of unique values available as keys %hash_of_f2 which you could then sort

[pr09]

my %hash;
open (FILE,"abc.txt");
while (<FILE>)
{
   chomp;
   my ($key,$val) = split '\|';
   print $hash{$val};
}

This is a bit of code which i have written,i did not applied sort on it till now.But,its not working.

[wind]

Almost there:

use strict;
use warnings;

my %hash;
open my $fh, '<', 'abc.txt' or die $!;
while (<$fh>) {
    chomp;
    my ($key, $val) = split '\|';
    $hash{$val}++;
}

print "$_\n" for sort keys %hash;