use strict;
use warnings;
my ($outer_hash, $new_hash);

$outer_hash->{backupsize} = [{
                              'totalsize' => '89',
                              'hostname' => 'aaaa',
                              'application' => 'IDB'
                            },
                            {
                              'application' => 'IDB',
                              'hostname' => 'aaaa',
                              'totalsize' => '32770'
                            },
                            {
                              'application' => 'SAP',
                              'hostname' => 'bbbb',
                              'totalsize' => '14'
                            }];
for my $entry(@{ $outer_hash->{backupsize} }){
    next unless $entry->{hostname} and $entry->{application} and $entr
+y->{totalsize};
    $new_hash->{$entry->{hostname}} {$entry->{application}} += $entry-
+>{totalsize};
}

for my $h (sort keys %$new_hash){
    print "HOST:$h:\n";
    for my $app(keys %{ $new_hash->{$h}}){
        print "\t",$new_hash->{$h}{$app},"\t$app\n";
    }
}

[download]
OUTPUT: 
HOST:aaaa:
    32859    IDB
HOST:bbbb:
    14    SAP

[download]

        "Software interprets lawyers as damage, and routes around them" - Larry Wall

In reply to Re: Array of hashes by NetWallah
in thread Array of hashes by AnishaM

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.