php, perl, python, ruby and R are the GCD, it's reasonable to expect an experienced dev to be productive in them in 3 days. If you offer to teach the other dev

php, perl, python, ruby and R are the GCD, it's reasonable to expect an experienced dev to be productive in them in 3 days. If you offer to teach the other devs scala or Haskell you'll probably get interest. Probably they won't know what SML is, unless they went to one of the few schools that use OCaml/ML to teach