Trait/Object

com.twitter.algebird

Semigroup

Related Docs: object Semigroup | package algebird

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trait Semigroup[T] extends Serializable

A semigroup is any type T with an associative operation (plus):

a plus (b plus c) = (a plus b) plus c

Example instances:

Annotations
@implicitNotFound( ... )
Source
Semigroup.scala
Linear Supertypes
Serializable, AnyRef, Any
Known Subclasses
AbstractField, AbstractGroup, AbstractMonoid, AbstractRing, AbstractSemigroup, AdjoinedUnitRing, AffineFunctionMonoid, AndValMonoid, ApplicativeField, ApplicativeGroup, ApplicativeMonoid, ApplicativeRing, ApplicativeSemigroup, ArrayGroup, ArrayMonoid, AveragedGroup, BatchedMonoid, BatchedSemigroup, BigDecimalRing, BigIntRing, BijectedField, BijectedGroup, BijectedMonoid, BijectedRing, BijectedSemigroup, BloomFilterMonoid, BooleanField, CMSMonoid, ConstantGroup, DecayedValueMonoid, DoubleField, EitherMonoid, EitherSemigroup, EventuallyGroup, EventuallyMonoid, EventuallyRing, EventuallySemigroup, Field, FloatField, Function1Monoid, GaussianDistributionMonoid, GenericMapMonoid, GenericMapRing, Group, HashingTrickMonoid, HyperLogLogMonoid, HyperLogLogSeriesMonoid, IndexedSeqGroup, IndexedSeqMonoid, IndexedSeqRing, IndexedSeqSemigroup, IntRing, JBoolField, JDoubleField, JFloatField, JIntRing, JListMonoid, JLongRing, JMapMonoid, JShortRing, ListMonoid, LongRing, MapGroup, MapMonoid, MapRing, MinHasher, MinHasher16, MinHasher32, MinPlusSemiring, MomentsGroup, Monoid, MonoidCombinator, NullGroup, NumericRing, OptionGroup, OptionMonoid, OrValMonoid, PriorityQueueMonoid, Product10Group, Product10Monoid, Product10Ring, Product10Semigroup, Product11Group, Product11Monoid, Product11Ring, Product11Semigroup, Product12Group, Product12Monoid, Product12Ring, Product12Semigroup, Product13Group, Product13Monoid, Product13Ring, Product13Semigroup, Product14Group, Product14Monoid, Product14Ring, Product14Semigroup, Product15Group, Product15Monoid, Product15Ring, Product15Semigroup, Product16Group, Product16Monoid, Product16Ring, Product16Semigroup, Product17Group, Product17Monoid, Product17Ring, Product17Semigroup, Product18Group, Product18Monoid, Product18Ring, Product18Semigroup, Product19Group, Product19Monoid, Product19Ring, Product19Semigroup, Product20Group, Product20Monoid, Product20Ring, Product20Semigroup, Product21Group, Product21Monoid, Product21Ring, Product21Semigroup, Product22Group, Product22Monoid, Product22Ring, Product22Semigroup, Product2Group, Product2Monoid, Product2Ring, Product2Semigroup, Product3Group, Product3Monoid, Product3Ring, Product3Semigroup, Product4Group, Product4Monoid, Product4Ring, Product4Semigroup, Product5Group, Product5Monoid, Product5Ring, Product5Semigroup, Product6Group, Product6Monoid, Product6Ring, Product6Semigroup, Product7Group, Product7Monoid, Product7Ring, Product7Semigroup, Product8Group, Product8Monoid, Product8Ring, Product8Semigroup, Product9Group, Product9Monoid, Product9Ring, Product9Semigroup, PromiseLinkMonoid, QTreeSemigroup, ResetStateMonoid, RightFolded2Monoid, Ring, SGDMonoid, ScMapGroup, ScMapMonoid, ScMapRing, ScopedTopNCMSMonoid, SemigroupCombinator, SeqMonoid, SetMonoid, ShortRing, SketchMapMonoid, SpaceSaverSemigroup, StatisticsGroup, StatisticsMonoid, StatisticsRing, StatisticsSemigroup, StringMonoid, TopCMSMonoid, TopKMonoid, TopNCMSMonoid, TopPctCMSMonoid, TunnelMonoid, Tuple10Group, Tuple10Monoid, Tuple10Ring, Tuple10Semigroup, Tuple11Group, Tuple11Monoid, Tuple11Ring, Tuple11Semigroup, Tuple12Group, Tuple12Monoid, Tuple12Ring, Tuple12Semigroup, Tuple13Group, Tuple13Monoid, Tuple13Ring, Tuple13Semigroup, Tuple14Group, Tuple14Monoid, Tuple14Ring, Tuple14Semigroup, Tuple15Group, Tuple15Monoid, Tuple15Ring, Tuple15Semigroup, Tuple16Group, Tuple16Monoid, Tuple16Ring, Tuple16Semigroup, Tuple17Group, Tuple17Monoid, Tuple17Ring, Tuple17Semigroup, Tuple18Group, Tuple18Monoid, Tuple18Ring, Tuple18Semigroup, Tuple19Group, Tuple19Monoid, Tuple19Ring, Tuple19Semigroup, Tuple20Group, Tuple20Monoid, Tuple20Ring, Tuple20Semigroup, Tuple21Group, Tuple21Monoid, Tuple21Ring, Tuple21Semigroup, Tuple22Group, Tuple22Monoid, Tuple22Ring, Tuple22Semigroup, Tuple2Group, Tuple2Monoid, Tuple2Ring, Tuple2Semigroup, Tuple3Group, Tuple3Monoid, Tuple3Ring, Tuple3Semigroup, Tuple4Group, Tuple4Monoid, Tuple4Ring, Tuple4Semigroup, Tuple5Group, Tuple5Monoid, Tuple5Ring, Tuple5Semigroup, Tuple6Group, Tuple6Monoid, Tuple6Ring, Tuple6Semigroup, Tuple7Group, Tuple7Monoid, Tuple7Ring, Tuple7Semigroup, Tuple8Group, Tuple8Monoid, Tuple8Ring, Tuple8Semigroup, Tuple9Group, Tuple9Monoid, Tuple9Ring, Tuple9Semigroup, UnitGroup
Type Hierarchy
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  1. Semigroup
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Abstract Value Members

  1. abstract def plus(l: T, r: T): T

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    Combines two T instances associatively.

    Combines two T instances associatively.

    returns

    result of combining l and r

Concrete Value Members

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

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

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

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    Definition Classes
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  4. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  5. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

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    Definition Classes
    AnyRef

  7. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  8. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

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

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    Definition Classes
    AnyRef → Any

  10. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  11. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

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

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    Definition Classes
    AnyRef

  13. final def notify(): Unit

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    Definition Classes
    AnyRef

  14. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

  15. def sumOption(iter: TraversableOnce[T]): Option[T]

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    Returns an instance of T calculated by summing all instances in iter in one pass.

    Returns an instance of T calculated by summing all instances in iter in one pass. Returns None if iter is empty, else Some[T].

    iter

    instances of T to be combined

    returns

    None if iter is empty, else an option value containing the summed T

    Note

    Override if there is a faster way to compute this sum than iter.reduceLeftOption using plus.

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

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    Definition Classes
    AnyRef

  17. def toString(): String

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  18. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  19. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  20. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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