#you will need to define your own mutator function
sub someFunc{ #removes tabs
    my $old = shift;
    my $new = $old;
    $new =~ s/\t//g;
    return $new;
}

%nDimHash; #this might be a HoAoHoAoAoAoS or whatever;
%nDimHash = recIterate(\%recIterate, \&someFunc);