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for my $i ( keys %{ $config->{item} } ) 
{
    print $config->{item}->{$i}->{id}, ": ";
    print $config->{item}->{$i}->{destination_dir}, "\n";
}

for my $i (sort { $config->{item}->{$a}->{id} <=> $config->{item}->{$b
+}->{id} } keys %{ $config->{item} } ) 
{
    print $config->{item}->{$i}->{id}, ": ";
    print $config->{item}->{$i}->{destination_dir}, "\n";
}