Applicative functors

// Applicative functors (Haskell - Scalaz comparison)

val mult  = (_:Int) * (_:Int)
val multc = mult.curried

// (*) <$> Just 3 <*> Just 5
some(5) <*> some(3) ∘ multc

// pure (*) <*> Just 3 <*> Just 5
some(5) <*> (some(3) <*> multc.pure[Option])

// ... alternatives
some(3) ⊛ some(5) apply mult
(some(3) |@| some(5)) {_ * _}