Not quite but thank you for the reply. I have created the following sub:
    my ($name,$dirs,$final_href) = @_;
    my %data;
    foreach my $dir (@{$dirs})
    {

        decode($dir."/".$name,%data); # will change name
        my $final_href = 
        (
            data => { ( %{$final_href->{data} },%{ $data{data} } ) },
            total => do
            {
                my %total;
                for my $href ( $final_href->{total}, $data{total} ) {
                 $total{$_} += $href->{total}{$_} for keys %{ $href->{
+total} };
                }
            \%total;
            }
        );
    }

[download]
But it won't work because when I pass $final_href to this sub, it is empty, so it will fail "Can't use an undefined value as a HASH reference"
. I tried to add:
$files_href->{data} = ();
$files_href->{total} = ();

[download]
But it also does not work. it wants a real hash (because we do dereferencing with %{$final_href->{data}).
Any ideas how to solve it?

In reply to Re^12: Merge hashes in specific format by ovedpo15
in thread Merge hashes in specific format by ovedpo15

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