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Full Discussion: help on perl script..
Top Forums Shell Programming and Scripting help on perl script.. Post 302215132 by zedex on Tuesday 15th of July 2008 03:24:35 PM
Old 07-15-2008
what u can do is use hash in perl
1. open file in read mode
2. use regex to get filed after "User Id:"
3. put this "user Id" as key in Hash if not present
4. every time you find user present increase key value by 1
5. at the end sort keys of hash and do print.

following link might help

Perl Hash Howto
 

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Hash::Case::Lower(3pm)					User Contributed Perl Documentation				    Hash::Case::Lower(3pm)

NAME
Hash::Case::Lower - hash with enforced lower cased keys INHERITANCE
Hash::Case::Lower is a Hash::Case is a Tie::StdHash SYNOPSIS
use Hash::Case::Lower; tie my(%lchash), 'Hash::Case::Lower'; $lchash{StraNGeKeY} = 3; print keys %lchash; # strangekey DESCRIPTION
Hash::Case::Lower extends Hash::Case, which lets you play various trics with hash keys. In this implementation, the fake hash is case insensitive and the keys stored in lower-case. METHODS
Constructors $obj->addHashData(HASH) See "Constructors" in Hash::Case $obj->addPairs(PAIRS) See "Constructors" in Hash::Case $obj->setHash(HASH) See "Constructors" in Hash::Case tie(HASH, 'Hash::Case::Lower', [VALUES,] OPTIONS) Define HASH to have only lower cased keys. The hash is initialized with the VALUES, specified as ref-array (with key value pairs) or ref-hash. Currently, there are no OPTIONS defined. SEE ALSO
This module is part of Hash-Case distribution version 1.02, built on March 09, 2012. Website: http://perl.overmeer.net/hash-case/ LICENSE
Copyrights 2002-2003,2007-2012 by Mark Overmeer. For other contributors see ChangeLog. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See http://www.perl.com/perl/misc/Artistic.html perl v5.14.2 2012-03-09 Hash::Case::Lower(3pm)
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