trait Foldable1[F[_]] extends Foldable[F]
A scalaz.Foldable where foldMap is total over semigroups.
That is, toList cannot return an empty list.
- Self Type
- Foldable1[F]
- Source
- Foldable1.scala
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- By Inheritance
- Foldable1
- Foldable
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Type Members
-
trait
FoldableLaw
extends AnyRef
- Definition Classes
- Foldable
- trait Foldable1Law extends FoldableLaw
Abstract Value Members
-
abstract
def
foldMap1[A, B](fa: F[A])(f: (A) ⇒ B)(implicit F: Semigroup[B]): B
Map each element of the structure to a scalaz.Semigroup, and combine the results.
-
abstract
def
foldMapRight1[A, B](fa: F[A])(z: (A) ⇒ B)(f: (A, ⇒ B) ⇒ B): B
Right-associative fold of a structure.
Concrete Value Members
-
final
def
!=(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
-
final
def
##(): Int
- Definition Classes
- AnyRef → Any
-
final
def
==(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
-
def
all[A](fa: F[A])(p: (A) ⇒ Boolean): Boolean
Whether all
As infayield true fromp.Whether all
As infayield true fromp.- Definition Classes
- Foldable
-
def
allM[G[_], A](fa: F[A])(p: (A) ⇒ G[Boolean])(implicit G: Monad[G]): G[Boolean]
allwith monadic traversal.allwith monadic traversal.- Definition Classes
- Foldable
-
def
any[A](fa: F[A])(p: (A) ⇒ Boolean): Boolean
Whether any
As infayield true fromp.Whether any
As infayield true fromp.- Definition Classes
- Foldable
-
def
anyM[G[_], A](fa: F[A])(p: (A) ⇒ G[Boolean])(implicit G: Monad[G]): G[Boolean]
anywith monadic traversal.anywith monadic traversal.- Definition Classes
- Foldable
-
final
def
asInstanceOf[T0]: T0
- Definition Classes
- Any
-
def
bicompose[G[_, _]](implicit arg0: Bifoldable[G]): Bifoldable[[a, b]F[G[a, b]]]
The composition of Foldable
Fand BifoldableG,[x, y]F[G[x, y]], is a BifoldableThe composition of Foldable
Fand BifoldableG,[x, y]F[G[x, y]], is a Bifoldable- Definition Classes
- Foldable
-
def
clone(): AnyRef
- Attributes
- protected[java.lang]
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
def
collapse[X[_], A](x: F[A])(implicit A: ApplicativePlus[X]): X[A]
- Definition Classes
- Foldable
-
def
compose[G[_]](implicit arg0: Foldable1[G]): Foldable1[[α]F[G[α]]]
The composition of Foldable1
FandG,[x]F[G[x]], is a Foldable1 -
def
compose[G[_]](implicit G0: Foldable[G]): Foldable[[α]F[G[α]]]
The composition of Foldables
FandG,[x]F[G[x]], is a FoldableThe composition of Foldables
FandG,[x]F[G[x]], is a Foldable- Definition Classes
- Foldable
-
final
def
count[A](fa: F[A]): Int
Alias for
length.Alias for
length.- Definition Classes
- Foldable
-
def
element[A](fa: F[A], a: A)(implicit arg0: Equal[A]): Boolean
Whether
ais an element offa.Whether
ais an element offa.- Definition Classes
- Foldable
-
final
def
empty[A](fa: F[A]): Boolean
always return
false -
final
def
eq(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
-
def
equals(arg0: Any): Boolean
- Definition Classes
- AnyRef → Any
-
def
finalize(): Unit
- Attributes
- protected[java.lang]
- Definition Classes
- AnyRef
- Annotations
- @throws( classOf[java.lang.Throwable] )
-
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.
- Definition Classes
- Foldable
- def fold1[M](t: F[M])(implicit arg0: Semigroup[M]): M
-
def
foldLeft[A, B](fa: F[A], z: B)(f: (B, A) ⇒ B): B
Left-associative fold of a structure.
Left-associative fold of a structure.
- Definition Classes
- Foldable
-
def
foldLeft1[A](fa: F[A])(f: (A, A) ⇒ A): A
Left-associative fold of a structure.
-
def
foldLeft1Opt[A](fa: F[A])(f: (A, A) ⇒ A): Option[A]
- Definition Classes
- Foldable
-
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.
Left-associative, monadic fold of a structure.
- Definition Classes
- Foldable
-
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.
Map each element of the structure to a scalaz.Monoid, and combine the results.
-
def
foldMap1Opt[A, B](fa: F[A])(f: (A) ⇒ B)(implicit F: Semigroup[B]): Option[B]
As
foldMapbut returningNoneif the foldable is empty andSomeotherwise -
def
foldMapLeft1[A, B](fa: F[A])(z: (A) ⇒ B)(f: (B, A) ⇒ B): B
Left-associative fold of a structure.
- def foldMapLeft1Opt[A, B](fa: F[A])(z: (A) ⇒ B)(f: (B, A) ⇒ B): Option[B]
-
def
foldMapM[G[_], A, B](fa: F[A])(f: (A) ⇒ G[B])(implicit B: Monoid[B], G: Monad[G]): G[B]
Specialization of foldRightM when
Bhas aMonoid.Specialization of foldRightM when
Bhas aMonoid.- Definition Classes
- Foldable
- def foldMapRight1Opt[A, B](fa: F[A])(z: (A) ⇒ B)(f: (A, ⇒ B) ⇒ B): Option[B]
-
def
foldRight[A, B](fa: F[A], z: ⇒ B)(f: (A, ⇒ B) ⇒ B): B
Right-associative fold of a structure.
-
def
foldRight1[A](fa: F[A])(f: (A, ⇒ A) ⇒ A): A
Right-associative fold of a structure.
-
def
foldRight1Opt[A](fa: F[A])(f: (A, ⇒ A) ⇒ A): Option[A]
- Definition Classes
- Foldable
-
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.
Right-associative, monadic fold of a structure.
- Definition Classes
- Foldable
- def foldable1Law: Foldable1Law
- val foldable1Syntax: Foldable1Syntax[F]
-
def
foldableLaw: FoldableLaw
- Definition Classes
- Foldable
-
val
foldableSyntax: FoldableSyntax[F]
- Definition Classes
- Foldable
-
final
def
foldl[A, B](fa: F[A], z: B)(f: (B) ⇒ (A) ⇒ B): B
Curried version of
foldLeftCurried version of
foldLeft- Definition Classes
- Foldable
-
final
def
foldl1[A](fa: F[A])(f: (A) ⇒ (A) ⇒ A): A
Curried
foldLeft1. - def foldl1Opt[A](fa: F[A])(f: (A) ⇒ (A) ⇒ A): Option[A]
-
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
foldLeftMCurried version of
foldLeftM- Definition Classes
- Foldable
-
final
def
foldr[A, B](fa: F[A], z: ⇒ B)(f: (A) ⇒ (⇒ B) ⇒ B): B
Curried version of
foldRightCurried version of
foldRight- Definition Classes
- Foldable
-
final
def
foldr1[A](fa: F[A])(f: (A) ⇒ (⇒ A) ⇒ A): A
Curried
foldRight1. - def foldr1Opt[A](fa: F[A])(f: (A) ⇒ (⇒ A) ⇒ A): Option[A]
-
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
foldRightMCurried version of
foldRightM- Definition Classes
- Foldable
-
final
def
getClass(): Class[_]
- Definition Classes
- AnyRef → Any
-
def
hashCode(): Int
- Definition Classes
- AnyRef → Any
-
def
index[A](fa: F[A], i: Int): Option[A]
- returns
the element at index
iin aSome, orNoneif the given index falls outside of the range
- Definition Classes
- Foldable
-
def
indexOr[A](fa: F[A], default: ⇒ A, i: Int): A
- returns
the element at index
i, ordefaultif the given index falls outside of the range
- Definition Classes
- Foldable
-
def
intercalate[A](fa: F[A], a: A)(implicit arg0: Monoid[A]): A
Insert an
Abetween every A, yielding the sum. -
def
intercalate1[A](fa: F[A], a: A)(implicit A: Semigroup[A]): A
Insert an
Abetween every A, yielding the sum. -
final
def
isInstanceOf[T0]: Boolean
- Definition Classes
- Any
-
def
length[A](fa: F[A]): Int
Deforested alias for
toStream(fa).size.Deforested alias for
toStream(fa).size.- Definition Classes
- Foldable
-
def
longDigits[A](fa: F[A])(implicit d: <:<[A, Digit]): Long
- Definition Classes
- Foldable
-
def
maximum[A](fa: F[A])(implicit arg0: Order[A]): Option[A]
The greatest element of
fa, or None iffais empty. -
def
maximum1[A](fa: F[A])(implicit arg0: Order[A]): A
The greatest element of
fa. -
def
maximumBy[A, B](fa: F[A])(f: (A) ⇒ B)(implicit arg0: Order[B]): Option[A]
The element
aoffawhich yields the greatest value off(a), or None iffais empty. -
def
maximumBy1[A, B](fa: F[A])(f: (A) ⇒ B)(implicit arg0: Order[B]): A
The element
aoffawhich yield the greatest value off(a). -
def
maximumOf[A, B](fa: F[A])(f: (A) ⇒ B)(implicit arg0: Order[B]): Option[B]
The greatest value of
f(a)for each elementaoffa, or None iffais empty. -
def
maximumOf1[A, B](fa: F[A])(f: (A) ⇒ B)(implicit arg0: Order[B]): B
The greatest value of
f(a)for each elementaoffa. -
def
minimum[A](fa: F[A])(implicit arg0: Order[A]): Option[A]
The smallest element of
fa, or None iffais empty. -
def
minimum1[A](fa: F[A])(implicit arg0: Order[A]): A
The smallest element of
fa. -
def
minimumBy[A, B](fa: F[A])(f: (A) ⇒ B)(implicit arg0: Order[B]): Option[A]
The element
aoffawhich yields the smallest value off(a), or None iffais empty. -
def
minimumBy1[A, B](fa: F[A])(f: (A) ⇒ B)(implicit arg0: Order[B]): A
The element
aoffawhich yield the smallest value off(a). -
def
minimumOf[A, B](fa: F[A])(f: (A) ⇒ B)(implicit arg0: Order[B]): Option[B]
The smallest value of
f(a)for each elementaoffa, or None iffais empty. -
def
minimumOf1[A, B](fa: F[A])(f: (A) ⇒ B)(implicit arg0: Order[B]): B
The smallest value of
f(a)for each elementaoffa. -
final
def
ne(arg0: AnyRef): Boolean
- Definition Classes
- AnyRef
-
final
def
notify(): Unit
- Definition Classes
- AnyRef
-
final
def
notifyAll(): Unit
- Definition Classes
- AnyRef
-
def
product[G[_]](implicit G0: Foldable1[G]): Foldable1[[α](F[α], G[α])]
The product of Foldable1
FandG,[x](F[x], G[x]]), is a Foldable1 -
def
product[G[_]](implicit G0: Foldable[G]): Foldable[[α](F[α], G[α])]
The product of Foldables
FandG,[x](F[x], G[x]]), is a FoldableThe product of Foldables
FandG,[x](F[x], G[x]]), is a Foldable- Definition Classes
- Foldable
-
def
product0[G[_]](implicit G0: Foldable[G]): Foldable1[[α](F[α], G[α])]
The product of Foldable1
Fand FoldableG,[x](F[x], G[x]]), is a Foldable1 -
def
product0[G[_]](implicit G0: Foldable1[G]): Foldable1[[α](F[α], G[α])]
The product of Foldable
Fand Foldable1G,[x](F[x], G[x]]), is a Foldable1The product of Foldable
Fand Foldable1G,[x](F[x], G[x]]), is a Foldable1- Definition Classes
- Foldable
-
def
selectSplit[A](fa: F[A])(p: (A) ⇒ Boolean): List[NonEmptyList[A]]
Selects groups of elements that satisfy p and discards others.
Selects groups of elements that satisfy p and discards others.
- Definition Classes
- Foldable
- def sequence1_[M[_], A](fa: F[M[A]])(implicit a: Apply[M], x: Semigroup[M[A]]): M[Unit]
-
def
sequenceF_[M[_], A](ffa: F[Free[M, A]]): Free[M, Unit]
sequence_for Free.sequence_for Free. collapses into a single Free *- Definition Classes
- Foldable
-
def
sequenceS_[S, A](fga: F[State[S, A]]): State[S, Unit]
sequence_specialized toState*sequence_specialized toState*- Definition Classes
- Foldable
-
def
sequence_[M[_], A](fa: F[M[A]])(implicit a: Applicative[M]): M[Unit]
Strict sequencing in an applicative functor
Mthat ignores the value infa.Strict sequencing in an applicative functor
Mthat ignores the value infa.- Definition Classes
- Foldable
-
def
splitWith[A](fa: F[A])(p: (A) ⇒ Boolean): List[NonEmptyList[A]]
Splits the elements into groups that alternatively satisfy and don't satisfy the predicate p.
Splits the elements into groups that alternatively satisfy and don't satisfy the predicate p.
- Definition Classes
- Foldable
-
final
def
synchronized[T0](arg0: ⇒ T0): T0
- Definition Classes
- AnyRef
-
def
to[A, G[_]](fa: F[A])(implicit c: CanBuildFrom[Nothing, A, G[A]]): G[A]
- Definition Classes
- Foldable
-
def
toEphemeralStream[A](fa: F[A]): EphemeralStream[A]
- Definition Classes
- Foldable
-
def
toIList[A](fa: F[A]): IList[A]
- Definition Classes
- Foldable
-
def
toIndexedSeq[A](fa: F[A]): IndexedSeq[A]
- Definition Classes
- Foldable
-
def
toList[A](fa: F[A]): List[A]
- Definition Classes
- Foldable
-
def
toSet[A](fa: F[A]): Set[A]
- Definition Classes
- Foldable
-
def
toStream[A](fa: F[A]): Stream[A]
- Definition Classes
- Foldable
-
def
toString(): String
- Definition Classes
- AnyRef → Any
- def traverse1_[M[_], A, B](fa: F[A])(f: (A) ⇒ M[B])(implicit a: Apply[M], x: Semigroup[M[B]]): M[Unit]
-
def
traverseS_[S, A, B](fa: F[A])(f: (A) ⇒ State[S, B]): State[S, Unit]
traverse_specialized toState*traverse_specialized toState*- Definition Classes
- Foldable
-
final
def
traverseU_[A, GB](fa: F[A])(f: (A) ⇒ GB)(implicit G: Unapply[Applicative, GB]): M[Unit]
A version of
traverse_that infers the type constructorM.A version of
traverse_that infers the type constructorM.- Definition Classes
- Foldable
-
def
traverse_[M[_], A, B](fa: F[A])(f: (A) ⇒ M[B])(implicit a: Applicative[M]): M[Unit]
Strict traversal in an applicative functor
Mthat ignores the result off.Strict traversal in an applicative functor
Mthat ignores the result off.- Definition Classes
- Foldable
-
final
def
wait(): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
final
def
wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
final
def
wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )