Hi, sorting on the first field of the arrays instead of the 5th one, because you did not specify what to do with undef values (i.e. how to sort them): 
use strict;
use warnings;
use Data::Dumper

my %hash = (
       '10857' => [
                       '10857',
                       'Test-host1',
                       '192.168.162.124',
                       undef,
                       undef,
                       undef,
                       undef,
                       'Timeout while connecting to "192.168.162.124:1
+61"'
                     ],
          '10715' => [
                       '10715',
                       'Test-Host2',
                       '192.168.162.146',
                       'checkPing[{HOST.IP}]',
                       '108',
                       '108',
                       '2014-04-01 20:24:01',
                       ''
                     ],
          '10778' => [
                       '10778',
                       'Test-Host3',
                       '192.168.162.144',
                       'checkPing[{HOST.IP}]',
                       '392',
                       '359',
                       '2014-04-01 20:21:12',
                       ''
                     ],
        '10582' => [
                       '10582',
                       'Test-Host3',
                       '192.168.162.95',
                       'icmppingsec',
                       '117.390000',
                       '116.493000',
                       '2014-04-01 20:23:03',
                       ''
                     ]
);

my @sorted_array = sort {$a->[0] <=> $b->[0] } values %hash;

print Dumper \@sorted_array;

[download]
You'll have to change the 
{$a->[0] <=> $b->[0] }

[download]
part to something like: { (do something for undef values;) $a->4 <=> $b->4 }

The result: 

  ARRAY(0x404bfc18)
   0  10582
   1  'Test-Host3'
   2  '192.168.162.95'
   3  'icmppingsec'
   4  117.390000
   5  116.493000
   6  '2014-04-01 20:23:03'
   7  ''
1  ARRAY(0x40135fe0)
   0  10715
   1  'Test-Host2'
   2  '192.168.162.146'
   3  'checkPing[{HOST.IP}]'
   4  108
   5  108
   6  '2014-04-01 20:24:01'
   7  ''
2  ARRAY(0x40573600)
   0  10778
   1  'Test-Host3'
   2  '192.168.162.144'
   3  'checkPing[{HOST.IP}]'
   4  392
   5  359
   6  '2014-04-01 20:21:12'
   7  ''
3  ARRAY(0x4012a0d8)
   0  10857
   1  'Test-host1'
   2  '192.168.162.124'
   3  undef
   4  undef
   5  undef
   6  undef
   7  'Timeout while connecting to "192.168.162.124:161"'

[download]

In reply to Re: Need to sort and data structure based on values inside arrayrefs. by Laurent_R
in thread Need to sort and data structure based on values inside arrayrefs. by shekarkcb

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