As addition, because I see many numbered filehandles in some coworkers code:

Or, if they're saved in a hash (which is imo the better way if you have no fixed or a large number of handles): 
   # untested
   $hash{ $_ }->close for keys %hash;

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In reply to Re^2: closing multiple filehandles with one command by phaylon
in thread closing multiple filehandles with one command by Anonymous Monk

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