You'll probably want to split it into an array, possibly with substr or unpack, then use sort to sort it. Something like: 
#!/usr/bin/perl

use warnings;
use strict;

our @rows;
while (<>)
{
  chomp;
  push @rows,[unpack("a10a13a6a8a13a5",$_)];
}

@rows = sort { $a->[0] cmp $b->[0]
                       ||
               $a->[1] cmp $b->[1]
                       ||
               $a->[4] cmp $b->[4] } @rows;

[download]

Update: Fixed field sizes, which are clearer now that the post is cleaned up.


--
sgifford's Web page

In reply to Re: Sample Sort Code by sgifford
in thread Sample Sort Code by Anonymous Monk

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