com.twitter.algebird

FlatMapPreparer

trait FlatMapPreparer[A, T] extends Preparer[A, T]

A Preparer that has had one or more flatMap operations applied. It can only accept MonoidAggregators.

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Preparer[A, T], Serializable, AnyRef, Any
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Abstract Value Members

  1. abstract def prepareFn: (A) ⇒ TraversableOnce[T]

Concrete Value Members

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

    Definition Classes
    AnyRef
  2. final def !=(arg0: Any): Boolean

    Definition Classes
    Any
  3. final def ##(): Int

    Definition Classes
    AnyRef → Any
  4. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  5. final def ==(arg0: Any): Boolean

    Definition Classes
    Any
  6. def aggregate[B, C](aggregator: MonoidAggregator[T, B, C]): MonoidAggregator[A, B, C]

    alias of monoidAggregate for convenience unlike MapPreparer's aggregate, can only take MonoidAggregator

  7. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  8. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  9. def collect[U](p: PartialFunction[T, U]): FlatMapPreparer[A, U]

    Definition Classes
    Preparer
  10. def count(pred: (T) ⇒ Boolean): MonoidAggregator[A, Long, Long]

    count and following methods all just call monoidAggregate with one of the standard Aggregators.

    count and following methods all just call monoidAggregate with one of the standard Aggregators. see the Aggregator object for more docs.

    Definition Classes
    Preparer
  11. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  12. def equals(arg0: Any): Boolean

    Definition Classes
    AnyRef → Any
  13. def exists(pred: (T) ⇒ Boolean): MonoidAggregator[A, Boolean, Boolean]

    Definition Classes
    Preparer
  14. def filter(fn: (T) ⇒ Boolean): FlatMapPreparer[A, T]

    Filter out values that do not meet the predicate.

    Filter out values that do not meet the predicate. Like flatMap, this limits future aggregations to MonoidAggregator.

    Definition Classes
    Preparer
  15. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  16. def flatMap[U](fn: (T) ⇒ TraversableOnce[U]): FlatMapPreparer[A, U] { val prepareFn: A => TraversableOnce[U] }

    Produce a new Preparer that chains this one-to-many transformation.

    Produce a new Preparer that chains this one-to-many transformation. Because "many" could include "none", this limits future aggregations to those done using monoids.

    Definition Classes
    FlatMapPreparerPreparer
  17. def flatten[U](implicit ev: <:<[T, TraversableOnce[U]]): FlatMapPreparer[A, U]

    Like flatMap using identity.

    Like flatMap using identity.

    Definition Classes
    Preparer
  18. def forall(pred: (T) ⇒ Boolean): MonoidAggregator[A, Boolean, Boolean]

    Definition Classes
    Preparer
  19. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  20. def hashCode(): Int

    Definition Classes
    AnyRef → Any
  21. def headOption: MonoidAggregator[A, Option[T], Option[T]]

    headOption and following methods are all just calling lift with standard Aggregators see the Aggregator object for more docs

    headOption and following methods are all just calling lift with standard Aggregators see the Aggregator object for more docs

    Definition Classes
    Preparer
  22. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any
  23. def lastOption: MonoidAggregator[A, Option[T], Option[T]]

    Definition Classes
    Preparer
  24. def lift[B, C](aggregator: Aggregator[T, B, C]): MonoidAggregator[A, Option[B], Option[C]]

    transform a given Aggregator into a MonoidAggregator by lifting the reduce and present stages into Option space

    transform a given Aggregator into a MonoidAggregator by lifting the reduce and present stages into Option space

    Definition Classes
    Preparer
  25. def map[U](fn: (T) ⇒ U): FlatMapPreparer[A, U]

  26. def maxOption(implicit ord: Ordering[T]): MonoidAggregator[A, Option[T], Option[T]]

    Definition Classes
    Preparer
  27. def maxOptionBy[U](fn: (T) ⇒ U)(implicit arg0: Ordering[U]): MonoidAggregator[A, Option[T], Option[T]]

    Definition Classes
    Preparer
  28. def minOption(implicit ord: Ordering[T]): MonoidAggregator[A, Option[T], Option[T]]

    Definition Classes
    Preparer
  29. def minOptionBy[U](fn: (T) ⇒ U)(implicit arg0: Ordering[U]): MonoidAggregator[A, Option[T], Option[T]]

    Definition Classes
    Preparer
  30. def monoidAggregate[B, C](aggregator: MonoidAggregator[T, B, C]): MonoidAggregator[A, B, C]

    Produce a new MonoidAggregator which includes the Preparer's transformation chain in its prepare stage.

    Produce a new MonoidAggregator which includes the Preparer's transformation chain in its prepare stage.

    Definition Classes
    FlatMapPreparerPreparer
  31. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  32. final def notify(): Unit

    Definition Classes
    AnyRef
  33. final def notifyAll(): Unit

    Definition Classes
    AnyRef
  34. def reduceOption(fn: (T, T) ⇒ T): MonoidAggregator[A, Option[T], Option[T]]

    Definition Classes
    Preparer
  35. def size: MonoidAggregator[A, Long, Long]

    Definition Classes
    Preparer
  36. def sortedReverseTake(count: Int)(implicit ord: Ordering[T]): MonoidAggregator[A, PriorityQueue[T], Seq[T]]

    Definition Classes
    Preparer
  37. def sortedTake(count: Int)(implicit ord: Ordering[T]): MonoidAggregator[A, PriorityQueue[T], Seq[T]]

    Definition Classes
    Preparer
  38. def split[B1, B2, C1, C2](fn: (FlatMapPreparer[TraversableOnce[T], T]) ⇒ (MonoidAggregator[TraversableOnce[T], B1, C1], MonoidAggregator[TraversableOnce[T], B2, C2])): Aggregator[A, (B1, B2), (C1, C2)]

    Split the processing into two parallel aggregations.

    Split the processing into two parallel aggregations. You provide a function which produces two different aggregators from this preparer, and it will return a single aggregator which does both aggregations in parallel. (See also Aggregator's join method.)

    We really need to generate N versions of this for 3-way, 4-way etc splits.

  39. def sum(implicit monoid: Monoid[T]): MonoidAggregator[A, T, T]

    Like monoidAggregate, but using an implicit Monoid to construct the Aggregator

  40. def sumOption(implicit sg: Semigroup[T]): MonoidAggregator[A, Option[T], Option[T]]

    Definition Classes
    Preparer
  41. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  42. def toList: MonoidAggregator[A, Option[Batched[T]], List[T]]

    Definition Classes
    Preparer
  43. def toSet: MonoidAggregator[A, Set[T], Set[T]]

    Definition Classes
    Preparer
  44. def toString(): String

    Definition Classes
    AnyRef → Any
  45. def uniqueCount: MonoidAggregator[A, Set[T], Int]

    Definition Classes
    Preparer
  46. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  47. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  48. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from Preparer[A, T]

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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