scalaz.example

BifunctorUsage

object BifunctorUsage extends App

A Bifunctor is very similar to a Functor, which you are hopefully already familiar with. Whereas a Functor operates on a * → * and has a single operation map which takes a function from A => B to map a F[A] to a F[B], a Bifunctor operates on a *,* → * and has a single operation bimap which takes two functions: A ⇒ C and a B ⇒ D to map a F[A,B] to a F[C,D]:

def bimap[A, B, C, D](fab: F[A, B])(f: A => C, g: B => D): F[C, D]

some examples of common types for which we have Bifunctor instances are Either, Validation, \/, Tuple2

Source
BifunctorUsage.scala
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  1. final def !=(arg0: AnyRef): Boolean

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  6. def args: Array[String]

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  7. final def asInstanceOf[T0]: T0

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  8. val bff: Bifunctor[[α, β]List[\/[α, β]]]

  9. val bfres: List[\/[String, Int]]

  10. def clone(): AnyRef

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  11. def delayedInit(body: ⇒ Unit): Unit

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  14. val executionStart: Long

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  15. def finalize(): Unit

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  16. val fourTwo: (Int, Int)

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  18. def hashCode(): Int

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  19. final def isInstanceOf[T0]: Boolean

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  20. val leftF: Functor[[α$0$]\/[α$0$, String]]

  21. def main(args: Array[String]): Unit

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  22. final def ne(arg0: AnyRef): Boolean

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  23. final def notify(): Unit

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  24. final def notifyAll(): Unit

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  25. val rightF: Functor[[β$1$]\/[String, β$1$]]

  26. val strlen: (String) ⇒ Int

  27. final def synchronized[T0](arg0: ⇒ T0): T0

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  28. def toString(): String

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  29. val two: Validation[String, Int]

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