HN Theater @HNTheaterMonth

Time travelling debuggers are not common, though after Bret Victor's talk many people wondered about how to replicate the ideal TTD he showed.
The Elm community has arguably achieved the objective, this video shows what they have achieved and how easy it is to try it out for yourself.

References:
- Bret Victor's Inventing on Principle https://www.youtube.com/watch?v=PUv66718DII
- Elm's website http://elm-lang.org/
- Introducing Elm Reactor article http://elm-lang.org/blog/Introducing-Elm-Reactor.elm
- Debug Mario http://debug.elm-lang.org/edit/Mario.elm
- Elm mailing list https://groups.google.com/forum/#!forum/elm-discuss
- Elm channel on freenode #elm