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

Linear Supertypes
Monoid[Map[K, V]], AdditiveMonoid[Map[K, V]], cats.kernel.Monoid[Map[K, V]], Semigroup[Map[K, V]], AdditiveSemigroup[Map[K, V]], cats.kernel.Semigroup[Map[K, V]], Serializable, Serializable, AnyRef, Any
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Inherited
  1. JMapMonoid
  2. Monoid
  3. AdditiveMonoid
  4. Monoid
  5. Semigroup
  6. AdditiveSemigroup
  7. Semigroup
  8. Serializable
  9. Serializable
  10. AnyRef
  11. 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. def additive: algebra.Monoid[Map[K, V]]

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    These are from algebra.Monoid

    These are from algebra.Monoid

    Definition Classes
    Monoid → AdditiveMonoid → Semigroup → AdditiveSemigroup

  5. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

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

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    Definition Classes
    Monoid

  7. def clone(): AnyRef

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

  8. def combine(l: Map[K, V], r: Map[K, V]): Map[K, V]

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    Definition Classes
    Semigroup → Semigroup

  9. def combineAll(t: TraversableOnce[Map[K, V]]): Map[K, V]

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    Definition Classes
    Monoid → Monoid

  10. def combineAllOption(as: IterableOnce[Map[K, V]]): Option[Map[K, V]]

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    Definition Classes
    Monoid → Semigroup

  11. def combineN(a: Map[K, V], n: Int): Map[K, V]

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    Definition Classes
    Monoid → Semigroup

  12. def empty: Map[K, V]

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    Definition Classes
    Monoid → Monoid

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

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    Definition Classes
    AnyRef

  14. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  15. def finalize(): Unit

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

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

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    Definition Classes
    AnyRef → Any

  17. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  18. def isEmpty(a: Map[K, V])(implicit ev: Eq[Map[K, V]]): Boolean

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    Definition Classes
    Monoid

  19. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

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

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    Definition Classes
    JMapMonoid → Monoid

  21. def isZero(a: Map[K, V])(implicit ev: Eq[Map[K, V]]): Boolean

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    Definition Classes
    AdditiveMonoid

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

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    Definition Classes
    AnyRef

  23. val nonZero: (V) ⇒ Boolean

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

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    Definition Classes
    Monoid

  25. final def notify(): Unit

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    Definition Classes
    AnyRef

  26. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

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

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    Definition Classes
    JMapMonoid → AdditiveSemigroup

  28. def positiveSumN(a: Map[K, V], n: Int): Map[K, V]

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    Attributes
    protected[this]
    Definition Classes
    AdditiveSemigroup

  29. def repeatedCombineN(a: Map[K, V], n: Int): Map[K, V]

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    Attributes
    protected[this]
    Definition Classes
    Semigroup

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

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    Definition Classes
    Monoid → AdditiveMonoid

  31. def sumN(a: Map[K, V], n: Int): Map[K, V]

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    Definition Classes
    AdditiveMonoid → AdditiveSemigroup

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

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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

    Definition Classes
    Semigroup
    Note

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

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

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    Definition Classes
    AnyRef

  34. def toString(): String

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    Definition Classes
    AnyRef → Any

  35. def trySum(as: TraversableOnce[Map[K, V]]): Option[Map[K, V]]

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    Definition Classes
    AdditiveMonoid → AdditiveSemigroup

  36. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

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

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    Definition Classes
    JMapMonoid → AdditiveMonoid

Inherited from Monoid[Map[K, V]]

Inherited from AdditiveMonoid[Map[K, V]]

Inherited from cats.kernel.Monoid[Map[K, V]]

Inherited from Semigroup[Map[K, V]]

Inherited from AdditiveSemigroup[Map[K, V]]

Inherited from cats.kernel.Semigroup[Map[K, V]]

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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