$var[] is now empty string, not void
@main[] $n[] =^n.match[sdf][]{123}= <hr> =$3= <hr> $строка[123] ^строка.match[(.);g]{($match.1)} <hr> $a{ $b[1] } ^$b=$b<br> ^$a!$a<br> ^$b=$b<br> <hr>