Someone hacked together something very similar with Haskell arrows. http://scrambledeggsontoast.github.io/2014/09/28/needle-announce/ http://scrambledeggsontoa

Someone hacked together something very similar with Haskell arrows. http://scrambledeggsontoast.github.io/2014/09/28/needle-announce/ http://scrambledeggsontoast.github.io/2014/09/28/needle-anno...