Cokleisli

final case class Cokleisli[F[_], A, B](run: F[A] => B)

Represents a function F[A] => B.

Companion: object

trait Serializable

trait Product

trait Equals

class Object

trait Matchable

class Any

Value members

Concrete methods

Example:

scala> import cats._, data._
scala> val sum = Cokleisli((xs: NonEmptyList[Int]) => xs.reduceLeft(_ + _))

scala> sum.contramapValue((xs: NonEmptyList[String]) => xs.map(_.toInt)).run(NonEmptyList.of("1","2","3"))
res4: Int = 6

Example:

scala> import cats._, data._
scala> val f = Cokleisli((xs: NonEmptyList[Int]) => xs.reverse.head)
scala> def before(x: Double) = x.toInt
scala> def after(x: Int) = x.toString
scala> f.dimap(before)(after).run(NonEmptyList.of(1.0,2.0))
res0: String = 2

Example:

scala> import cats._, data._, implicits._
scala> val f = Cokleisli((xs: NonEmptyList[Int]) => xs.reverse.head)
scala> def before(x: Double) = x.toInt
scala> def after(x: Int) = x.toString
scala> f.lmap(before).rmap(after).run(NonEmptyList.of(1.0,2.0))
res0: String = 2

Inherited methods

Inherited from: Product

Inherited from: Product