The title describes what I think I want to do.

I need in a DBI fetch loop to initialise those values of the return from a fetchrow_hashref that are undef. I want the code to mimic: 

    for (@$ref2) { $_ = '' unless defined }

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The only way i can work out how to do this is below, how can i get rid of %tmp?? 

while (my $ref2 = $sth2->fetchrow_hashref()) {
   my %tmp = %$ref2;
   while (my ($k, $v) = each %tmp) {
      $tmp{$k} = '' if (!defined $tmp{$k});
      $k = '';$v = '';
   }
   push @{ $tablist{$user_table} }, \%tmp;
}

[download]

In reply to setting values in anonymous hash by agoth

Title:
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