$VAR1 is HoH = Hash of Hash.
$VAR2 is AoHoH = Array of Hash of Hash.

Trying explain. Please correct me if i am wrong. It seems like Sami is trying to merge two hashes. $VAR1 is within HASH and $VAR2 is within ARRAY but no changes to its' key value. This code is to explain only. it's not perfect. 
my %joined_FS;
my %outer_keys;
for my $var (($VAR1, $VAR2))
{
    if (ref $var eq "HASH")
    {
        while (my($key, $value) = each %$VAR1)
        {
            $outer_keys{$key} = $value;
        }
    }
    elsif (ref $var eq "ARRAY")
    {
        for my $href (@$var)
        {
            my  @unq_keys = keys %$href;
            for my $key (@unq_keys)
            {
                if (!exists $outer_keys{$key})
                {
                    $outer_keys{$key} = $href->{$key};
                }
                else
                {
                    while (my($k, $v) = each %{$href->{$key}})
                    {
                        $outer_keys{$key}->{$k} = $v;
                    }
                }
            }
        }
    }
}
print Dumper \%outer_keys;

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In reply to Re^2: Error: when joining two hashes by gurung
in thread Error: when joining two hashes by Sami_R

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