Packages

trait Commutative[A] extends Associative[A]

The Commutative type class describes a binary operator for a type A that is both associative and commutative. This means that a1 <> a2 is equal to a2 <> a1 for all values a1 and a2. Examples of commutative operations include addition for integers, but not concatenation for strings.

Commutative operators are useful because combining values with a commutative operation results in the same value regardless of the order in which values are combined, allowing us to combine values in the order that is most efficient and allowing us to return determinate values even when the order of original values is indeterminate.

Self Type
Commutative[A]
Linear Supertypes
Associative[A], AnyRef, Any
Known Subclasses
CommutativeEqual, CommutativeIdentity
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Inherited
  1. Commutative
  2. Associative
  3. AnyRef
  4. Any
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Visibility
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Abstract Value Members

  1. abstract def combine(l: ⇒ A, r: ⇒ A): A
    Definition Classes
    Associative

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() @HotSpotIntrinsicCandidate()
  6. final def commute: Commutative[A]

    Returns a new Commutative instance that describes the same binary operator but applied in reverse order.

    Returns a new Commutative instance that describes the same binary operator but applied in reverse order. Since the operation is commutative this instance is guaranteed to return the same results as the original instance but one order of combination or the other may be more efficient in certain cases.

  7. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  8. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  9. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  10. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  11. final def intersperse(middle: A): Associative[A]
    Definition Classes
    Associative
  12. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  13. def multiplyOption(n: Int)(a: A): Option[A]
    Definition Classes
    Associative
  14. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  15. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  16. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @HotSpotIntrinsicCandidate()
  17. final def repeat(a: A)(n: Int): A
    Definition Classes
    Associative
  18. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  19. def toString(): String
    Definition Classes
    AnyRef → Any
  20. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  21. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  22. 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 Associative[A]

Inherited from AnyRef

Inherited from Any

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