scala.collection.generic.ParMapFactory#CanCombineFromMap

class CanCombineFromMap[K, V] extends CanCombineFrom[CC[_, _], (K, V), CC[K, V]]

Instance Constructors From scala.collection.generic.ParMapFactory.CanCombineFromMap ——————————————————————————–

new CanCombineFromMap()

(defined at scala.collection.generic.ParMapFactory.CanCombineFromMap)

Value Members From scala.collection.generic.ParMapFactory.CanCombineFromMap

def apply(): Combiner[(K, V), CC[K, V]]

Creates a new builder from scratch.

  • returns
    • a builder for collections of type To with element type Elem .
  • Definition Classes
    • CanCombineFromMap → CanCombineFrom → CanBuildFrom
  • See also
    • scala.collection.breakOut

(defined at scala.collection.generic.ParMapFactory.CanCombineFromMap)

def apply(from: MapColl): Combiner[(K, V), CC[K, V]]

Creates a new builder on request of a collection.

  • from
    • the collection requesting the builder to be created.
  • returns
    • a builder for collections of type To with element type Elem . The collections framework usually arranges things so that the created builder will build the same kind of collection as from .
  • Definition Classes
    • CanCombineFromMap → CanCombineFrom → CanBuildFrom

(defined at scala.collection.generic.ParMapFactory.CanCombineFromMap)

Value Members From Implicit scala.collection.parallel.CollectionsHaveToParArray ——————————————————————————–

def toParArray: ParArray[T]

  • Implicit information
    • This member is added by an implicit conversion from CanCombineFromMap [K, V] to CollectionsHaveToParArray [CanCombineFromMap [K, V], T] performed by method CollectionsHaveToParArray in scala.collection.parallel. This conversion will take place only if an implicit value of type ( CanCombineFromMap [K, V]) ⇒ GenTraversableOnce [T] is in scope.
  • Definition Classes
    • CollectionsHaveToParArray (added by implicit convertion: scala.collection.parallel.CollectionsHaveToParArray)

Full Source:

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2010-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala
package collection
package generic

import scala.collection.parallel.ParMap
import scala.collection.parallel.ParMapLike
import scala.collection.parallel.Combiner
import scala.collection.mutable.Builder
import scala.language.higherKinds

/** A template class for companion objects of `ParMap` and subclasses thereof.
 *  This class extends `TraversableFactory` and provides a set of operations
 *  to create `$Coll` objects.
 *
 *  @define coll parallel map
 *  @define Coll `ParMap`
 *  @author Aleksandar Prokopec
 *  @since 2.8
 */
abstract class ParMapFactory[CC[X, Y] <: ParMap[X, Y] with ParMapLike[X, Y, CC[X, Y], _]]
extends GenMapFactory[CC]
   with GenericParMapCompanion[CC] {

  type MapColl = CC[_, _]

  /** The default builder for $Coll objects.
   *  @tparam K      the type of the keys
   *  @tparam V      the type of the associated values
   */
  override def newBuilder[K, V]: Builder[(K, V), CC[K, V]] = newCombiner[K, V]

  /** The default combiner for $Coll objects.
   *  @tparam K     the type of the keys
   *  @tparam V     the type of the associated values
   */
  def newCombiner[K, V]: Combiner[(K, V), CC[K, V]]

  class CanCombineFromMap[K, V] extends CanCombineFrom[CC[_, _], (K, V), CC[K, V]] {
    def apply(from: MapColl) = from.genericMapCombiner[K, V].asInstanceOf[Combiner[(K, V), CC[K, V]]]
    def apply() = newCombiner[K, V]
  }

}