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   print STDOUT @NewRow[0], " ", @NewRow[1], "\n";

   print STDOUT $NewRow[0], " ", $NewRow[1], "\n";

open( BEST, "< $best_file") || die "Sorry, can't open $best_file: $!";

...
   push( @best_array, \@NewRow ); # Take reference, avoid copy
   print STDOUT "\t Proceeding to next line...\n";
}