scalaz

Foldable

trait Foldable[F[_]] extends AnyRef

A type parameter implying the ability to extract zero or more values of that type.

Self Type
Foldable[F]
Source
Foldable.scala
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Abstract Value Members

  1. abstract def foldMap[A, B](fa: F[A])(f: (A) ⇒ B)(implicit F: Monoid[B]): B

    Map each element of the structure to a scalaz.Monoid, and combine the results.

  2. abstract def foldRight[A, B](fa: F[A], z: ⇒ B)(f: (A, ⇒ B) ⇒ B): B

    Right-associative fold of a structure.

Concrete Value Members

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

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  2. final def !=(arg0: Any): Boolean

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  3. final def ##(): Int

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  4. final def ==(arg0: AnyRef): Boolean

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  5. final def ==(arg0: Any): Boolean

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  6. def all[A](fa: F[A])(p: (A) ⇒ Boolean): Boolean

    Whether all As in fa yield true from p.

  7. def allM[G[_], A](fa: F[A])(p: (A) ⇒ G[Boolean])(implicit G: Monad[G]): G[Boolean]

    all with monadic traversal.

  8. def any[A](fa: F[A])(p: (A) ⇒ Boolean): Boolean

    Whether any As in fa yield true from p.

  9. def anyM[G[_], A](fa: F[A])(p: (A) ⇒ G[Boolean])(implicit G: Monad[G]): G[Boolean]

    any with monadic traversal.

  10. final def asInstanceOf[T0]: T0

    Definition Classes
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  11. def clone(): AnyRef

    Attributes
    protected[java.lang]
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    @throws( ... )
  12. def collapse[X[_], A](x: F[A])(implicit F: Foldable[F], A: ApplicativePlus[X]): X[A]

  13. def collapse2[G[_], X[_], A](x: F[G[A]])(implicit F: Foldable[F], G: Foldable[G], A: ApplicativePlus[X]): X[A]

  14. def collapse3[G[_], H[_], X[_], A](x: F[G[H[A]]])(implicit F: Foldable[F], G: Foldable[G], H: Foldable[H], A: ApplicativePlus[X]): X[A]

  15. def collapse4[G[_], H[_], I[_], X[_], A](x: F[G[H[I[A]]]])(implicit F: Foldable[F], G: Foldable[G], H: Foldable[H], I: Foldable[I], A: ApplicativePlus[X]): X[A]

  16. def collapse5[G[_], H[_], I[_], J[_], X[_], A](x: F[G[H[I[J[A]]]]])(implicit F: Foldable[F], G: Foldable[G], H: Foldable[H], I: Foldable[I], J: Foldable[J], A: ApplicativePlus[X]): X[A]

  17. def collapse6[G[_], H[_], I[_], J[_], K[_], X[_], A](x: F[G[H[I[J[K[A]]]]]])(implicit F: Foldable[F], G: Foldable[G], H: Foldable[H], I: Foldable[I], J: Foldable[J], K: Foldable[K], A: ApplicativePlus[X]): X[A]

  18. def collapse7[G[_], H[_], I[_], J[_], K[_], L[_], X[_], A](x: F[G[H[I[J[K[L[A]]]]]]])(implicit F: Foldable[F], G: Foldable[G], H: Foldable[H], I: Foldable[I], J: Foldable[J], K: Foldable[K], L: Foldable[L], A: ApplicativePlus[X]): X[A]

  19. def compose[G[_]](implicit G0: Foldable[G]): Foldable[[α]F[G[α]]]

    The composition of Foldables F and G, [x]F[G[x]], is a Foldable

  20. def count[A](fa: F[A]): Int

    Deforested alias for toStream(fa).size.

  21. def element[A](fa: F[A], a: A)(implicit arg0: Equal[A]): Boolean

    Whether a is an element of fa.

  22. def empty[A](fa: F[A]): Boolean

    Deforested alias for toStream(fa).isEmpty.

  23. final def eq(arg0: AnyRef): Boolean

    Definition Classes
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  24. def equals(arg0: Any): Boolean

    Definition Classes
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  25. def finalize(): Unit

    Attributes
    protected[java.lang]
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    @throws( classOf[java.lang.Throwable] )
  26. def fold[M](t: F[M])(implicit arg0: Monoid[M]): M

    Combine the elements of a structure using a monoid.

  27. def foldLeft[A, B](fa: F[A], z: B)(f: (B, A) ⇒ B): B

    Left-associative fold of a structure.

  28. def foldLeftM[G[_], A, B](fa: F[A], z: B)(f: (B, A) ⇒ G[B])(implicit M: Monad[G]): G[B]

    Left-associative, monadic fold of a structure.

  29. def foldMapIdentity[A, B](fa: F[A])(implicit F: Monoid[A]): A

    Unbiased sum of monoidal values.

  30. def foldRightM[G[_], A, B](fa: F[A], z: ⇒ B)(f: (A, ⇒ B) ⇒ G[B])(implicit M: Monad[G]): G[B]

    Right-associative, monadic fold of a structure.

  31. val foldableSyntax: FoldableSyntax[F]

  32. final def foldl[A, B](fa: F[A], z: B)(f: (B) ⇒ (A) ⇒ B): B

    Curred version of foldLeft

  33. final def foldlM[G[_], A, B](fa: F[A], z: ⇒ B)(f: (B) ⇒ (A) ⇒ G[B])(implicit M: Monad[G]): G[B]

    Curried version of foldLeftM

  34. final def foldr[A, B](fa: F[A], z: ⇒ B)(f: (A) ⇒ (⇒ B) ⇒ B): B

    Curried version of foldRight

  35. final def foldrM[G[_], A, B](fa: F[A], z: ⇒ B)(f: (A) ⇒ (⇒ B) ⇒ G[B])(implicit M: Monad[G]): G[B]

    Curried version of foldRightM

  36. final def getClass(): Class[_]

    Definition Classes
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  37. def hashCode(): Int

    Definition Classes
    AnyRef → Any
  38. def intercalate[A](fa: F[A], a: A)(implicit A: Monoid[A]): A

    Insert an A between every A, yielding the sum.

  39. final def isInstanceOf[T0]: Boolean

    Definition Classes
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  40. def longDigits[A](fa: F[A])(implicit d: <:<[A, Digit]): Long

  41. def maximum[A](fa: F[A])(implicit arg0: Order[A]): Option[A]

    The greatest element of fa, or None if fa is empty.

  42. def minimum[A](fa: F[A])(implicit arg0: Order[A]): Option[A]

    The smallest element of fa, or None if fa is empty.

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

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  44. final def notify(): Unit

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  45. final def notifyAll(): Unit

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  46. def product[G[_]](implicit G0: Foldable[G]): Foldable[[α](F[α], G[α])]

    The product of Foldables F and G, [x](F[x], G[x]]), is a Foldable

  47. def selectSplit[A](fa: F[A])(p: (A) ⇒ Boolean): List[List[A]]

    Selects groups of elements that satisfy p and discards others.

  48. def sequenceS_[S, A](fga: F[State[S, A]]): State[S, Unit]

    sequence_ specialized to State *

  49. def sequence_[M[_], A, B](fa: F[M[A]])(implicit a: Applicative[M]): M[Unit]

    Strict sequencing in an applicative functor M that ignores the value in fa.

  50. def splitWith[A](fa: F[A])(p: (A) ⇒ Boolean): List[List[A]]

    Splits the elements into groups that alternatively satisfy and don't satisfy the predicate p.

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

    Definition Classes
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  52. def toIndexedSeq[A](fa: F[A]): IndexedSeq[A]

  53. def toList[A](fa: F[A]): List[A]

  54. def toSet[A](fa: F[A]): Set[A]

  55. def toStream[A](fa: F[A]): Stream[A]

  56. def toString(): String

    Definition Classes
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  57. def traverseS_[S, A, B](fa: F[A])(f: (A) ⇒ State[S, B]): State[S, Unit]

    traverse_ specialized to State *

  58. def traverse_[M[_], A, B](fa: F[A])(f: (A) ⇒ M[B])(implicit a: Applicative[M]): M[Unit]

    Strict traversal in an applicative functor M that ignores the result of f.

  59. final def wait(): Unit

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    @throws( ... )
  60. final def wait(arg0: Long, arg1: Int): Unit

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    @throws( ... )
  61. final def wait(arg0: Long): Unit

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