AsyncReactive

Composes two instances of FunctionK into a new FunctionK that transforms one single functor to a cats.data.Tuple2K of two functors.

scala> import cats.arrow.FunctionK
scala> val list2option = λ[FunctionK[List, Option]](_.headOption)
scala> val list2vector = λ[FunctionK[List, Vector]](_.toVector)
scala> val optionAndVector = list2option and list2vector
scala> optionAndVector(List(1,2,3))
res0: cats.data.Tuple2K[Option,Vector,Int] = Tuple2K(Some(1),Vector(1, 2, 3))

Composes two instances of FunctionK into a new FunctionK with this transformation applied first.

Applies this functor transformation from F to G

Composes two instances of FunctionK into a new FunctionK with this transformation applied last.

Narrows the input type of this FunctionK from F to F0

Composes two instances of FunctionK into a new FunctionK that transforms a cats.data.EitherK to a single functor.

This transformation will be used to transform left F values while h will be used to transform right H values.

Widens the output type of this FunctionK from G to G0