until -package:numeric-prelude -package:streaming -package:util -package:scalpel-core -package:monad-loops -package:sparse-linear-algebra -package:language-bash -package:conferer -package:ghc -package:xmonad-contrib package:dunai
Similar to Yampa's delayed switching. Loses a b in case of an
exception.
Run the first
msf until the second one produces
True
from the output of the first.