Below is how i did it. The data is saved in a separate file, and read line by line. There are other ways to read file, eg. File::Slurp or File::Map.

It could have been done in 1 while loop, but i prefer 2 steps: 1st process the data, 2nd output the data. Then the code can be put in short subroutines, which i can easily create tests for them. 

#!/usr/bin/perl

use strict;
use warnings;

use Data::Dumper;

$Data::Dumper::Sortkeys = 1;
$Data::Dumper::Terse    = 1;

my $file = 'perlmonk_1170305_02_data.txt';
open FH, $file or die "Couldn't open file: [$!]\n";

my $data = {};
my $hash = {};
while ( <FH> )
{
    my $line = $_;
    chomp $line;
    if ( $line =~ m/(-){2,}/ )
    {
        # save all stored data if we see dashes line
        my $program = $hash->{Program} || '';
        my $jira    = $hash->{JIRA}    || '';
        if ( $program && $jira )
        {
            push @{ $data->{ $program }{ $jira }}, $hash;
            $hash = {};
        }
    }
    else
    {
        # store data in a temp hash
        my ( $key, $value ) = split /:\s*/, $line;
        $hash->{ $key } = $value;
    }
}

#print 'data = ' . Dumper( $data );

foreach my $prg ( sort keys %{ $data } )
{
    print "===========================================================
+=\n";
    print "    PROGRAM : $prg                                         
+         \n";
    print "===========================================================
+=\n";
    
    foreach my $jira ( sort keys %{ $data->{ $prg }})
    {    
        print "******************\n";
        print "JIRA ID : $jira\n";
        print "******************\n";

        foreach my $hash ( @{ $data->{ $prg }{ $jira }} )
        {
            foreach my $key ( keys %{ $hash })
            {
                # print the data except Program and JIRA
                next if $key =~ m/(Program|JIRA)/;
                print "    $key => $hash->{ $key }\n";
            }
            print "\n";
        }
    }
}

[download]
Output: 
============================================================
    PROGRAM : Development
============================================================
******************
JIRA ID : COM-1234
******************
    rev => r345676
    Reviewer => John Wick
    Description => Genral fix

    rev => r909276
    Reviewer => None
    Description => Updating Received

============================================================
    PROGRAM : Testing
============================================================
******************
JIRA ID : COM-6789
******************
    rev => r876391
    Reviewer => Balise Mat
    Description => Audited

    rev => r698392
    Reviewer => Chan Joe
    Description => SO hwat

    rev => r327896
    Reviewer => Chan Joe
    Description => Paid the Due

[download]

In reply to Re^3: Hash of Hash of Arrays by duyet
in thread Hash of Hash of Arrays by voltas

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