Packages

t

cats.kernel.instances

Function0Group

trait Function0Group[A] extends Function0Monoid[A] with Group[() ⇒ A]

Source
FunctionInstances.scala
Linear Supertypes
Group[() ⇒ A], Function0Monoid[A], Monoid[() ⇒ A], Function0Semigroup[A], Semigroup[() ⇒ A], Serializable, Serializable, AnyRef, Any
Ordering
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Inherited
  1. Function0Group
  2. Group
  3. Function0Monoid
  4. Monoid
  5. Function0Semigroup
  6. Semigroup
  7. Serializable
  8. Serializable
  9. AnyRef
  10. Any
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Visibility
  1. Public
  2. All

Abstract Value Members

  1. implicit abstract def A: Group[A]

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native() @IntrinsicCandidate()
  6. def combine(x: () ⇒ A, y: () ⇒ A): () ⇒ A

    Associative operation which combines two values.

    Associative operation which combines two values.

    Example:

    scala> import cats.kernel.instances.string._
    scala> import cats.kernel.instances.int._
    scala> import cats.kernel.instances.option._
    
    scala> Semigroup[String].combine("Hello ", "World!")
    res0: String = Hello World!
    
    scala> Semigroup[Option[Int]].combine(None, Some(1))
    res1: Option[Int] = Some(1)
    Definition Classes
    Function0SemigroupSemigroup
  7. def combineAll(as: IterableOnce[() ⇒ A]): () ⇒ A

    Given a sequence of as, sum them using the monoid and return the total.

    Given a sequence of as, sum them using the monoid and return the total.

    Example:

    scala> import cats.kernel.instances.string._
    
    scala> Monoid[String].combineAll(List("One ", "Two ", "Three"))
    res0: String = One Two Three
    
    scala> Monoid[String].combineAll(List.empty)
    res1: String = ""
    Definition Classes
    Monoid
  8. def combineAllOption(as: IterableOnce[() ⇒ A]): Option[() ⇒ A]

    Given a sequence of as, combine them and return the total.

    Given a sequence of as, combine them and return the total.

    If the sequence is empty, returns None. Otherwise, returns Some(total).

    Example:

    scala> import cats.kernel.instances.string._
    
    scala> Semigroup[String].combineAllOption(List("One ", "Two ", "Three"))
    res0: Option[String] = Some(One Two Three)
    
    scala> Semigroup[String].combineAllOption(List.empty)
    res1: Option[String] = None
    Definition Classes
    MonoidSemigroup
  9. def combineN(a: () ⇒ A, n: Int): () ⇒ A

    Return a appended to itself n times.

    Return a appended to itself n times. If n is negative, then this returns inverse(a) appended to itself n times.

    Definition Classes
    GroupMonoidSemigroup
  10. val empty: () ⇒ A

    Return the identity element for this monoid.

    Return the identity element for this monoid.

    Example:

    scala> import cats.kernel.instances.int._
    scala> import cats.kernel.instances.string._
    
    scala> Monoid[String].empty
    res0: String = ""
    
    scala> Monoid[Int].empty
    res1: Int = 0
    Definition Classes
    Function0MonoidMonoid
  11. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  12. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  13. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @IntrinsicCandidate()
  14. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @IntrinsicCandidate()
  15. def intercalate(middle: () ⇒ A): Semigroup[() ⇒ A]

    Between each pair of elements insert middle This name matches the term used in Foldable and Reducible and a similar Haskell function.

    Between each pair of elements insert middle This name matches the term used in Foldable and Reducible and a similar Haskell function.

    Definition Classes
    Semigroup
  16. def inverse(x: () ⇒ A): () ⇒ A

    Find the inverse of a.

    Find the inverse of a.

    combine(a, inverse(a)) = combine(inverse(a), a) = empty.

    Example:

    scala> import cats.kernel.instances.int._
    
    scala> Group[Int].inverse(5)
    res0: Int = -5
    Definition Classes
    Function0GroupGroup
  17. def isEmpty(a: () ⇒ A)(implicit ev: Eq[() ⇒ A]): Boolean

    Tests if a is the identity.

    Tests if a is the identity.

    Example:

    scala> import cats.kernel.instances.string._
    
    scala> Monoid[String].isEmpty("")
    res0: Boolean = true
    
    scala> Monoid[String].isEmpty("something")
    res1: Boolean = false
    Definition Classes
    Monoid
  18. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  19. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  20. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @IntrinsicCandidate()
  21. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @IntrinsicCandidate()
  22. def remove(a: () ⇒ A, b: () ⇒ A): () ⇒ A

    Remove the element b from a.

    Remove the element b from a.

    Equivalent to combine(a, inverse(b))

    Example:

    scala> import cats.kernel.instances.int._
    
    scala> Group[Int].remove(5, 2)
    res0: Int = 3
    Definition Classes
    Group
  23. def repeatedCombineN(a: () ⇒ A, n: Int): () ⇒ A

    Return a combined with itself more than once.

    Return a combined with itself more than once.

    Attributes
    protected[this]
    Definition Classes
    Semigroup
  24. def reverse: Monoid[() ⇒ A]

    return a semigroup that reverses the order so combine(a, b) == reverse.combine(b, a)

    return a semigroup that reverses the order so combine(a, b) == reverse.combine(b, a)

    Definition Classes
    MonoidSemigroup
  25. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  26. def toString(): String
    Definition Classes
    AnyRef → Any
  27. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  28. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  29. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] ) @Deprecated
    Deprecated

Inherited from Group[() ⇒ A]

Inherited from Function0Monoid[A]

Inherited from Monoid[() ⇒ A]

Inherited from Function0Semigroup[A]

Inherited from Semigroup[() ⇒ A]

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped