moritz is right, $" is better than $, ($, leaves a TAB bebore NEWLINE)

Not at all. Just use $, in conjunction with $\. 

{
   local $, = "\t";
   local $\ = "\n";
   for my $row ( @out ) {
      print @$row;
   }
}

[download]

Of course, the join method much clearer.

In reply to Re^2: Print AOA into tab sep values by ikegami
in thread Print AOA into tab sep values by Anonymous Monk

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