my $column_number = 3; # 0-origin based
my $prev = "";
for (
  map { $_->[0] }
  sort { $a->[1] cmp $b->[1] }
  map { [$_, (split)[$column_number]] }
  <>
) {
  print unless $_ eq $prev;
  $prev = $_;
}

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-- Randal L. Schwartz, Perl hacker

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119.

In reply to Re: Emulating 'sort' command through a Perl by merlyn
in thread Emulating 'sort' command through a Perl by paragkalra

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