Or, you can use a state flag:
my $print_next;
while (my $in = <IN>){
  foreach (@ref){
        if ($print_next) {
           print OUT "$_";
           undef $print_next;
        }
        $print_next = 1 if m/$in/;       
     }
   }
}

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In reply to Re: Getting values for next array iteration when matching current by choroba
in thread Getting values for next array iteration when matching current by naturalsciences

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