org.specs2.internal.scalaz

Foldable

trait Foldable[F[_]] extends AnyRef

Data structures that can be folded. Minimal complete definition: 'foldMap' or 'foldRight'.

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

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  11. def fold[M](t: F[M])(implicit arg0: Monoid[M]): M

    Combine the elements of a structure using a monoid.

    Combine the elements of a structure using a monoid. *

  12. def foldLeft[A, B](t: F[A], z: B, f: (B, A) ⇒ B): B

    Left-associative fold of a structure.

    Left-associative fold of a structure. *

  13. def foldMap[A, M](t: F[A], f: (A) ⇒ M)(implicit arg0: Monoid[M]): M

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

    Map each element of the structure to a monoid, and combine the results. *

  14. def foldRight[A, B](t: F[A], z: ⇒ B, f: (A, ⇒ B) ⇒ B): B

    Right-associative fold of a structure.

    Right-associative fold of a structure. *

  15. def foldl1[A, B](t: F[A], f: (A, A) ⇒ A): Option[A]

    A variant of 'foldl' that has no base case, and thus may only be applied to non-empty structures.

    A variant of 'foldl' that has no base case, and thus may only be applied to non-empty structures. *

  16. def foldr1[A, B](t: F[A], f: (A, ⇒ A) ⇒ A): Option[A]

    A variant of 'foldr' that has no base case, and thus is undefined for empty structures.

    A variant of 'foldr' that has no base case, and thus is undefined for empty structures. *

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

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