in reply to Extracting a bald host name

I'd probably use a non-destructive match instead of substitution:
my ($result) = $got =~ /^[^.]*/g;
($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord }map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,