in reply to poll ideas quest 2016
My preferred regex delimiter is:
(Thanks GrandFather for the seed of the idea)
"aa" =~ m║a+║;
($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, [download]