Class

com.twitter.algebird

JMapMonoid

Related Doc: package algebird

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class JMapMonoid[K, V] extends Monoid[Map[K, V]]

Since maps are mutable, this always makes a full copy. Prefer scala immutable maps if you use scala immutable maps, this operation is much faster TODO extend this to Group, Ring

Source
JavaMonoids.scala
Linear Supertypes
Monoid[Map[K, V]], Semigroup[Map[K, V]], Serializable, AnyRef, Any
Type Hierarchy
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Inherited
  1. JMapMonoid
  2. Monoid
  3. Semigroup
  4. Serializable
  5. AnyRef
  6. Any
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Visibility
  1. Public
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Instance Constructors

  1. new JMapMonoid()(implicit arg0: Semigroup[V])

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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
    AnyRef → Any

  4. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  5. def assertNotZero(v: Map[K, V]): Unit

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    Definition Classes
    Monoid

  6. def clone(): AnyRef

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

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

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    Definition Classes
    AnyRef

  8. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  9. def finalize(): Unit

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

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

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    Definition Classes
    AnyRef → Any

  11. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  12. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

  13. def isNonZero(x: Map[K, V]): Boolean

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    Definition Classes
    JMapMonoid → Monoid

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

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    Definition Classes
    AnyRef

  15. val nonZero: (V) ⇒ Boolean

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  16. def nonZeroOption(v: Map[K, V]): Option[Map[K, V]]

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    Definition Classes
    Monoid

  17. final def notify(): Unit

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    Definition Classes
    AnyRef

  18. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

  19. def plus(x: Map[K, V], y: Map[K, V]): HashMap[K, V]

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    Definition Classes
    JMapMonoid → Semigroup

  20. def sum(vs: TraversableOnce[Map[K, V]]): Map[K, V]

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    Definition Classes
    Monoid

  21. def sumOption(iter: TraversableOnce[Map[K, V]]): Option[Map[K, V]]

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    override this if there is a faster way to do this sum than reduceLeftOption on plus

    override this if there is a faster way to do this sum than reduceLeftOption on plus

    Definition Classes
    Semigroup

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

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    Definition Classes
    AnyRef

  23. def toString(): String

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    Definition Classes
    AnyRef → Any

  24. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  27. lazy val zero: HashMap[K, V]

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    Definition Classes
    JMapMonoid → Monoid

Inherited from Monoid[Map[K, V]]

Inherited from Semigroup[Map[K, V]]

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped