You appear to want to sort into conventional time order, but your date string will sort by day number, then by month and then by year -- which is backwards... Then you are sorting by seconds, then minutes and then hours -- also backwards. Or is that really what you want ?

The problem appears to be in two parts: (a) construct something that will sort into the order you want, (b) map that back to your actual keys. Perhaps:

use strict ;
use warnings ;

my %Date_Time = (
  '03-12-2008' => { '0'  => { '8'  => { '5'  => 'a',
                                        '15' => 'b', },
                              '08' => { '22' => 'c',
                                        '05' => 'd', }, }, },
  '04-12-2008' => { '0'  => { '5'  => { '8'  => 'e', }, }, },
  '05-12-2008' => { '0'  => { '5'  => { '9'  => 'f', }, }, },
) ;

my @order ;
foreach my $date (keys %Date_Time) {
  my ($d, $m, $y) = split(/-/, $date) ;
  my $o = sprintf("%04d%02d%02d", $y, $m, $d) ;
  foreach my $sec (keys %{$Date_Time{$date}}) {
    foreach my $min (keys %{$Date_Time{$date}{$sec}}) {
      foreach my $hour (keys %{$Date_Time{$date}{$sec}{$min}}) {      
+   
        push @order, $o . sprintf("%02d%02d%02d", $hour, $min, $sec)
                        . ":$date:$hour:$min:$sec" ;      
      } ;
    } ;
  } ;
} ;

@order = sort @order ;

foreach my $o (@order) {
  my (undef, $date, $hour, $min, $sec) = split(/:/, $o) ;
  print "Date=>$date $hour:$min:$sec = ", $Date_Time{$date}{$sec}{$min
+}{$hour}, "\n" ; 
} ;

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In reply to Re: Sort Hash array using date by gone2015
in thread Sort Hash array using date by madtoperl

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