Crossposted to
Reddit. It's considered polite to inform about crossposting, as there are many hackers not attending both the sites; by adding a link to the other one, you save them from unnecessary work should one of the sites have an answer.
map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]