Limit

Stream limiting: take, takeWhile, drop.

`drop`

Skip the first n elements of a stream.

drop : int -> Computation (Step r a) -> Computation (Step r a)

Take the first n elements of a stream.

take : int -> Computation (Step r a) -> Computation (Step null a)

Take elements while a predicate holds.

takeWhile : (a -> bool) -> Computation (Step r a) -> Computation (Step null a)