scala.collection.parallel

ParMapLike

trait ParMapLike[K, +V, +Repr <: ParMapLike[K, V, Repr, Sequential] with ParMap[K, V], +Sequential <: Map[K, V] with MapLike[K, V, Sequential]] extends GenMapLike[K, V, Repr] with ParIterableLike[(K, V), Repr, Sequential]

A template trait for mutable parallel maps. This trait is to be mixed in with concrete parallel maps to override the representation type.

The higher-order functions passed to certain operations may contain side-effects. Since implementations of bulk operations may not be sequential, this means that side-effects may not be predictable and may produce data-races, deadlocks or invalidation of state if care is not taken. It is up to the programmer to either avoid using side-effects or to use some form of synchronization when accessing mutable data.

K

the key type of the map

V

the value type of the map

Self Type
ParMapLike[K, V, Repr, Sequential]
Source
ParMapLike.scala
Since

2.9

Linear Supertypes
ParIterableLike[(K, V), Repr, Sequential], HasNewCombiner[(K, V), Repr], Parallel, CustomParallelizable[(K, V), Repr], GenMapLike[K, V, Repr], Equals, GenIterableLike[(K, V), Repr], GenTraversableLike[(K, V), Repr], Parallelizable[(K, V), Repr], GenTraversableOnce[(K, V)], AnyRef, Any
Known Subclasses
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Inherited
  1. ParMapLike
  2. ParIterableLike
  3. HasNewCombiner
  4. Parallel
  5. CustomParallelizable
  6. GenMapLike
  7. Equals
  8. GenIterableLike
  9. GenTraversableLike
  10. Parallelizable
  11. GenTraversableOnce
  12. AnyRef
  13. Any
Implicitly
  1. by traversable2ops
  2. by any2stringadd
  3. by any2stringfmt
  4. by any2ArrowAssoc
  5. by any2Ensuring
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Type Members

  1. trait Accessor[R, Tp] extends StrictSplitterCheckTask[R, Tp]

    Standard accessor task that iterates over the elements of the collection.

  2. class Aggregate[S] extends Accessor[S, Aggregate[S]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  3. trait BuilderOps[Elem, To] extends AnyRef

    Definition Classes
    ParIterableLike
  4. class Collect[S, That] extends Transformer[Combiner[S, That], Collect[S, That]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  5. abstract class Composite[FR, SR, R, First <: ParIterableLike.this.StrictSplitterCheckTask[FR, _], Second <: ParIterableLike.this.StrictSplitterCheckTask[SR, _]] extends NonDivisibleTask[R, Composite[FR, SR, R, First, Second]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  6. class Copy[U >: T, That] extends Transformer[Combiner[U, That], Copy[U, That]]

    Attributes
    protected
    Definition Classes
    ParIterableLike
  7. class CopyToArray[U >: T, This >: Repr] extends Accessor[Unit, CopyToArray[U, This]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  8. class Count extends Accessor[Int, Count]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  9. class CreateScanTree[U >: T] extends Transformer[ScanTree[U], CreateScanTree[U]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  10. class DefaultKeySet extends ParSet[K]

    Attributes
    protected
  11. class DefaultValuesIterable extends ParIterable[V]

    Attributes
    protected
  12. class Drop[U >: T, This >: Repr] extends Transformer[Combiner[U, This], Drop[U, This]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  13. class Exists extends Accessor[Boolean, Exists]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  14. class Filter[U >: T, This >: Repr] extends Transformer[Combiner[U, This], Filter[U, This]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  15. class FilterNot[U >: T, This >: Repr] extends Transformer[Combiner[U, This], FilterNot[U, This]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  16. class Find[U >: T] extends Accessor[Option[U], Find[U]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  17. class FlatMap[S, That] extends Transformer[Combiner[S, That], FlatMap[S, That]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  18. class Fold[U >: T] extends Accessor[U, Fold[U]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  19. class Forall extends Accessor[Boolean, Forall]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  20. class Foreach[S] extends Accessor[Unit, Foreach[S]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  21. class FromScanTree[U >: T, That] extends StrictSplitterCheckTask[Combiner[U, That], FromScanTree[U, That]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  22. class GroupBy[K, U >: T] extends Transformer[HashMapCombiner[K, U], GroupBy[K, U]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  23. class Map[S, That] extends Transformer[Combiner[S, That], Map[S, That]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  24. class Max[U >: T] extends Accessor[Option[U], Max[U]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  25. class Min[U >: T] extends Accessor[Option[U], Min[U]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  26. trait NonDivisible[R] extends NonDivisibleTask[R, NonDivisible[R]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  27. trait NonDivisibleTask[R, Tp] extends StrictSplitterCheckTask[R, Tp]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  28. abstract class ParComposite[FR, SR, R, First <: ParIterableLike.this.StrictSplitterCheckTask[FR, _], Second <: ParIterableLike.this.StrictSplitterCheckTask[SR, _]] extends Composite[FR, SR, R, First, Second]

    Performs two tasks in parallel, and waits for both to finish.

  29. class Partition[U >: T, This >: Repr] extends Transformer[(Combiner[U, This], Combiner[U, This]), Partition[U, This]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  30. class Product[U >: T] extends Accessor[U, Product[U]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  31. class Reduce[U >: T] extends Accessor[Option[U], Reduce[U]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  32. abstract class ResultMapping[R, Tp, R1] extends NonDivisibleTask[R1, ResultMapping[R, Tp, R1]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  33. type SSCTask[R, Tp] = StrictSplitterCheckTask[R, Tp]

    Definition Classes
    ParIterableLike
  34. case class ScanLeaf[U >: T](pit: IterableSplitter[U], op: (U, U) ⇒ U, from: Int, len: Int, prev: Option[ScanLeaf[U]], acc: U) extends ScanTree[U] with Product with Serializable

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  35. case class ScanNode[U >: T](left: ScanTree[U], right: ScanTree[U]) extends ScanTree[U] with Product with Serializable

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  36. trait ScanTree[U >: T] extends AnyRef

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  37. abstract class SeqComposite[FR, SR, R, First <: ParIterableLike.this.StrictSplitterCheckTask[FR, _], Second <: ParIterableLike.this.StrictSplitterCheckTask[SR, _]] extends Composite[FR, SR, R, First, Second]

    Sequentially performs one task after another.

  38. trait SignallingOps[PI <: DelegatedSignalling] extends AnyRef

    Definition Classes
    ParIterableLike
  39. class Slice[U >: T, This >: Repr] extends Transformer[Combiner[U, This], Slice[U, This]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  40. class Span[U >: T, This >: Repr] extends Transformer[(Combiner[U, This], Combiner[U, This]), Span[U, This]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  41. class SplitAt[U >: T, This >: Repr] extends Transformer[(Combiner[U, This], Combiner[U, This]), SplitAt[U, This]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  42. trait StrictSplitterCheckTask[R, Tp] extends Task[R, Tp]

    Attributes
    protected
    Definition Classes
    ParIterableLike
  43. class Sum[U >: T] extends Accessor[U, Sum[U]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  44. class Take[U >: T, This >: Repr] extends Transformer[Combiner[U, This], Take[U, This]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  45. class TakeWhile[U >: T, This >: Repr] extends Transformer[(Combiner[U, This], Boolean), TakeWhile[U, This]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  46. trait TaskOps[R, Tp] extends AnyRef

    Definition Classes
    ParIterableLike
  47. class ToParCollection[U >: T, That] extends Transformer[Combiner[U, That], ToParCollection[U, That]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  48. class ToParMap[K, V, That] extends Transformer[Combiner[(K, V), That], ToParMap[K, V, That]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  49. trait Transformer[R, Tp] extends Accessor[R, Tp]

    Attributes
    protected
    Definition Classes
    ParIterableLike
  50. class Zip[U >: T, S, That] extends Transformer[Combiner[(U, S), That], Zip[U, S, That]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  51. class ZipAll[U >: T, S, That] extends Transformer[Combiner[(U, S), That], ZipAll[U, S, That]]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike

Abstract Value Members

  1. abstract def +[B1 >: V](kv: (K, B1)): GenMap[K, B1]

    Definition Classes
    GenMapLike
  2. abstract def -(key: K): Repr

    Definition Classes
    GenMapLike
  3. abstract def empty: Repr

  4. abstract def get(key: K): Option[V]

    Definition Classes
    GenMapLike
  5. abstract def newCombiner: Combiner[(K, V), Repr]

    Attributes
    protected[this]
    Definition Classes
    HasNewCombiner
  6. abstract def seq: Sequential

  7. abstract def size: Int

    The size of this general map.

    The size of this general map.

    Note: will not terminate for infinite-sized collections.

    returns

    the number of elements in this general map.

    Definition Classes
    GenTraversableLikeGenTraversableOnce
  8. abstract def splitter: IterableSplitter[(K, V)]

    Creates a new parallel iterator used to traverse the elements of this parallel collection.

    Creates a new parallel iterator used to traverse the elements of this parallel collection. This iterator is more specific than the iterator of the returned by iterator, and augmented with additional accessor and transformer methods.

    returns

    a parallel iterator

    Attributes
    protected[parallel]
    Definition Classes
    ParIterableLike
  9. abstract def stringPrefix: String

    Defines the prefix of this object's toString representation.

    Defines the prefix of this object's toString representation.

    returns

    a string representation which starts the result of toString applied to this general map. By default the string prefix is the simple name of the collection class general map.

    Definition Classes
    GenTraversableLike

Concrete Value Members

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

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

    Test two objects for inequality.

    Test two objects for inequality.

    returns

    true if !(this == that), false otherwise.

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

    Equivalent to x.hashCode except for boxed numeric types and null.

    Equivalent to x.hashCode except for boxed numeric types and null. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For null returns a hashcode where null.hashCode throws a NullPointerException.

    returns

    a hash value consistent with ==

    Definition Classes
    AnyRef → Any
  4. def ++[B](that: GenTraversableOnce[B]): `GenMap`[B]

    [use case] Returns a new general map containing the elements from the left hand operand followed by the elements from the right hand operand.

    [use case]

    Returns a new general map containing the elements from the left hand operand followed by the elements from the right hand operand. The element type of the general map is the most specific superclass encompassing the element types of the two operands.

    Example:

    scala> val a = LinkedList(1)
    a: scala.collection.mutable.LinkedList[Int] = LinkedList(1)
    
    scala> val b = LinkedList(2)
    b: scala.collection.mutable.LinkedList[Int] = LinkedList(2)
    
    scala> val c = a ++ b
    c: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)
    
    scala> val d = LinkedList('a')
    d: scala.collection.mutable.LinkedList[Char] = LinkedList(a)
    
    scala> val e = c ++ d
    e: scala.collection.mutable.LinkedList[AnyVal] = LinkedList(1, 2, a)
    B

    the element type of the returned collection.

    that

    the traversable to append.

    returns

    a new general map which contains all elements of this general map followed by all elements of that.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Full Signature

    def ++[U >: (K, V), That](that: GenTraversableOnce[U])(implicit bf: CanBuildFrom[Repr, U, That]): That

  5. def ->[B](y: B): (ParMapLike[K, V, Repr, Sequential], B)

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to ArrowAssoc[ParMapLike[K, V, Repr, Sequential]] performed by method any2ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  6. def /:[S](z: S)(op: (S, (K, V)) ⇒ S): S

    Applies a binary operator to a start value and all elements of this general map, going left to right.

    Applies a binary operator to a start value and all elements of this general map, going left to right.

    Note: /: is alternate syntax for foldLeft; z /: xs is the same as xs foldLeft z.

    Examples:

    Note that the folding function used to compute b is equivalent to that used to compute c.

    scala> val a = LinkedList(1,2,3,4)
    a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)
    
    scala> val b = (5 /: a)(_+_)
    b: Int = 15
    
    scala> val c = (5 /: a)((x,y) => x + y)
    c: Int = 15

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered. or the operator is associative and commutative.

    z

    the start value.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this general map, going left to right with the start value z on the left:

    op(...op(op(z, x_1), x_2), ..., x_n)

    where x1, ..., xn are the elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  7. def :\[S](z: S)(op: ((K, V), S) ⇒ S): S

    Applies a binary operator to all elements of this general map and a start value, going right to left.

    Applies a binary operator to all elements of this general map and a start value, going right to left.

    Note: :\ is alternate syntax for foldRight; xs :\ z is the same as xs foldRight z.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered. or the operator is associative and commutative.

    Examples:

    Note that the folding function used to compute b is equivalent to that used to compute c.

    scala> val a = LinkedList(1,2,3,4)
    a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)
    
    scala> val b = (a :\ 5)(_+_)
    b: Int = 15
    
    scala> val c = (a :\ 5)((x,y) => x + y)
    c: Int = 15
    z

    the start value

    op

    the binary operator

    returns

    the result of inserting op between consecutive elements of this general map, going right to left with the start value z on the right:

    op(x_1, op(x_2, ... op(x_n, z)...))

    where x1, ..., xn are the elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  8. final def ==(arg0: AnyRef): Boolean

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

    Test two objects for equality.

    Test two objects for equality. The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    Definition Classes
    Any
  10. def aggregate[S](z: S)(seqop: (S, (K, V)) ⇒ S, combop: (S, S) ⇒ S): S

    Aggregates the results of applying an operator to subsequent elements.

    Aggregates the results of applying an operator to subsequent elements.

    This is a more general form of fold and reduce. It has similar semantics, but does not require the result to be a supertype of the element type. It traverses the elements in different partitions sequentially, using seqop to update the result, and then applies combop to results from different partitions. The implementation of this operation may operate on an arbitrary number of collection partitions, so combop may be invoked arbitrary number of times.

    For example, one might want to process some elements and then produce a Set. In this case, seqop would process an element and append it to the list, while combop would concatenate two lists from different partitions together. The initial value z would be an empty set.

    pc.aggregate(Set[Int]())(_ += process(_), _ ++ _)

    Another example is calculating geometric mean from a collection of doubles (one would typically require big doubles for this).

    S

    the type of accumulated results

    z

    the initial value for the accumulated result of the partition - this will typically be the neutral element for the seqop operator (e.g. Nil for list concatenation or 0 for summation)

    seqop

    an operator used to accumulate results within a partition

    combop

    an associative operator used to combine results from different partitions

    Definition Classes
    ParIterableLikeGenTraversableOnce
  11. def apply(key: K): V

    Definition Classes
    ParMapLikeGenMapLike
  12. final def asInstanceOf[T0]: T0

    Cast the receiver object to be of type T0.

    Cast the receiver object to be of type T0.

    Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression 1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expression List(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.

    returns

    the receiver object.

    Definition Classes
    Any
    Exceptions thrown
    ClassCastException

    if the receiver object is not an instance of the erasure of type T0.

  13. def asParIterable: ParIterable[(K, V)]

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to TraversableOps[(K, V)] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  14. def asParSeq: ParSeq[(K, V)]

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to TraversableOps[(K, V)] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  15. def bf2seq[S, That](bf: CanBuildFrom[Repr, S, That]): CanBuildFrom[Sequential, S, That]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  16. implicit def builder2ops[Elem, To](cb: Builder[Elem, To]): BuilderOps[Elem, To]

    Attributes
    protected
    Definition Classes
    ParIterableLike
  17. def canEqual(other: Any): Boolean

    Definition Classes
    ParIterableLike
  18. def clone(): AnyRef

    Create a copy of the receiver object.

    Create a copy of the receiver object.

    The default implementation of the clone method is platform dependent.

    returns

    a copy of the receiver object.

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

    not specified by SLS as a member of AnyRef

  19. def collect[B](pf: PartialFunction[A, B]): `GenMap`[B]

    [use case] Builds a new collection by applying a partial function to all elements of this general map on which the function is defined.

    [use case]

    Builds a new collection by applying a partial function to all elements of this general map on which the function is defined.

    B

    the element type of the returned collection.

    pf

    the partial function which filters and maps the general map.

    returns

    a new general map resulting from applying the given partial function pf to each element on which it is defined and collecting the results. The order of the elements is preserved.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Full Signature

    def collect[S, That](pf: PartialFunction[(K, V), S])(implicit bf: CanBuildFrom[Repr, S, That]): That

  20. def combinerFactory[S, That](cbf: () ⇒ Combiner[S, That]): CombinerFactory[S, That]

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  21. def combinerFactory: CombinerFactory[(K, V), Repr]

    Creates a combiner factory.

    Creates a combiner factory. Each combiner factory instance is used once per invocation of a parallel transformer method for a single collection.

    The default combiner factory creates a new combiner every time it is requested, unless the combiner is thread-safe as indicated by its canBeShared method. In this case, the method returns a factory which returns the same combiner each time. This is typically done for concurrent parallel collections, the combiners of which allow thread safe access.

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  22. def contains(key: K): Boolean

    Tests whether this map contains a binding for a key.

    Tests whether this map contains a binding for a key.

    key

    the key

    returns

    true if there is a binding for key in this map, false otherwise.

    Definition Classes
    ParMapLikeGenMapLike
  23. def copyToArray[U >: (K, V)](xs: Array[U], start: Int, len: Int): Unit

    Definition Classes
    ParIterableLikeGenTraversableOnce
  24. def copyToArray(xs: Array[A], start: Int): Unit

    [use case] Copies values of this general map to an array.

    [use case]

    Copies values of this general map to an array. Fills the given array xs with values of this general map, beginning at index start. Copying will stop once either the end of the current general map is reached, or the end of the array is reached.

    Note: will not terminate for infinite-sized collections.

    xs

    the array to fill.

    start

    the starting index.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def copyToArray[U >: (K, V)](xs: Array[U], start: Int): Unit

  25. def copyToArray(xs: Array[A]): Unit

    [use case] Copies values of this general map to an array.

    [use case]

    Copies values of this general map to an array. Fills the given array xs with values of this general map. Copying will stop once either the end of the current general map is reached, or the end of the array is reached.

    Note: will not terminate for infinite-sized collections.

    xs

    the array to fill.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def copyToArray[U >: (K, V)](xs: Array[U]): Unit

  26. def count(p: ((K, V)) ⇒ Boolean): Int

    Counts the number of elements in the general map which satisfy a predicate.

    Counts the number of elements in the general map which satisfy a predicate.

    p

    the predicate used to test elements.

    returns

    the number of elements satisfying the predicate p.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  27. def debugBuffer: ArrayBuffer[String]

    Definition Classes
    ParIterableLike
  28. def default(key: K): V

    Definition Classes
    ParMapLikeGenMapLike
  29. implicit def delegatedSignalling2ops[PI <: DelegatedSignalling](it: PI): SignallingOps[PI]

    Attributes
    protected
    Definition Classes
    ParIterableLike
  30. def drop(n: Int): Repr

    Selects all elements except first n ones.

    Selects all elements except first n ones.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    n

    the number of elements to drop from this general map.

    returns

    a general map consisting of all elements of this general map except the first n ones, or else the empty general map, if this general map has less than n elements.

    Definition Classes
    ParIterableLikeGenTraversableLike
  31. def dropWhile(pred: ((K, V)) ⇒ Boolean): Repr

    Drops all elements in the longest prefix of elements that satisfy the predicate, and returns a collection composed of the remaining elements.

    Drops all elements in the longest prefix of elements that satisfy the predicate, and returns a collection composed of the remaining elements.

    This method will use indexFlag signalling capabilities. This means that splitters may set and read the indexFlag state. The index flag is initially set to maximum integer value.

    pred

    the predicate used to test the elements

    returns

    a collection composed of all the elements after the longest prefix of elements in this general map that satisfy the predicate pred

    Definition Classes
    ParIterableLikeGenTraversableLike
  32. def ensuring(cond: (ParMapLike[K, V, Repr, Sequential]) ⇒ Boolean, msg: ⇒ Any): ParMapLike[K, V, Repr, Sequential]

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to Ensuring[ParMapLike[K, V, Repr, Sequential]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  33. def ensuring(cond: (ParMapLike[K, V, Repr, Sequential]) ⇒ Boolean): ParMapLike[K, V, Repr, Sequential]

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to Ensuring[ParMapLike[K, V, Repr, Sequential]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  34. def ensuring(cond: Boolean, msg: ⇒ Any): ParMapLike[K, V, Repr, Sequential]

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to Ensuring[ParMapLike[K, V, Repr, Sequential]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  35. def ensuring(cond: Boolean): ParMapLike[K, V, Repr, Sequential]

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to Ensuring[ParMapLike[K, V, Repr, Sequential]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  36. final def eq(arg0: AnyRef): Boolean

    Tests whether the argument (arg0) is a reference to the receiver object (this).

    Tests whether the argument (arg0) is a reference to the receiver object (this).

    The eq method implements an equivalence relation on non-null instances of AnyRef, and has three additional properties:

    • It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false.
    • For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false.
    • null.eq(null) returns true.

    When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).

    returns

    true if the argument is a reference to the receiver object; false otherwise.

    Definition Classes
    AnyRef
  37. def equals(that: Any): Boolean

    Compares two maps structurally; i.

    Compares two maps structurally; i.e. checks if all mappings contained in this map are also contained in the other map, and vice versa.

    that

    the other map

    returns

    true if both maps contain exactly the same mappings, false otherwise.

    Definition Classes
    GenMapLikeEquals → AnyRef → Any
  38. def exists(pred: ((K, V)) ⇒ Boolean): Boolean

    Tests whether a predicate holds for some element of this general map.

    Tests whether a predicate holds for some element of this general map.

    This method will use abort signalling capabilities. This means that splitters may send and read abort signals.

    pred

    a predicate used to test elements

    returns

    true if p holds for some element, false otherwise

    Definition Classes
    ParIterableLikeGenTraversableOnce
  39. def filter(pred: ((K, V)) ⇒ Boolean): Repr

    Selects all elements of this general map which satisfy a predicate.

    Selects all elements of this general map which satisfy a predicate.

    pred

    the predicate used to test elements.

    returns

    a new general map consisting of all elements of this general map that satisfy the given predicate p. Their order may not be preserved.

    Definition Classes
    ParIterableLikeGenTraversableLike
  40. def filterKeys(p: (K) ⇒ Boolean): ParMap[K, V]

    Filters this map by retaining only keys satisfying a predicate.

    Filters this map by retaining only keys satisfying a predicate.

    p

    the predicate used to test keys

    returns

    an immutable map consisting only of those key value pairs of this map where the key satisfies the predicate p. The resulting map wraps the original map without copying any elements.

    Definition Classes
    ParMapLikeGenMapLike
  41. def filterNot(pred: ((K, V)) ⇒ Boolean): Repr

    Selects all elements of this general map which do not satisfy a predicate.

    Selects all elements of this general map which do not satisfy a predicate.

    pred

    the predicate used to test elements.

    returns

    a new general map consisting of all elements of this general map that do not satisfy the given predicate p. Their order may not be preserved.

    Definition Classes
    ParIterableLikeGenTraversableLike
  42. def finalize(): Unit

    Called by the garbage collector on the receiver object when there are no more references to the object.

    Called by the garbage collector on the receiver object when there are no more references to the object.

    The details of when and if the finalize method is invoked, as well as the interaction between finalize and non-local returns and exceptions, are all platform dependent.

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

    not specified by SLS as a member of AnyRef

  43. def find(pred: ((K, V)) ⇒ Boolean): Option[(K, V)]

    Finds some element in the collection for which the predicate holds, if such an element exists.

    Finds some element in the collection for which the predicate holds, if such an element exists. The element may not necessarily be the first such element in the iteration order.

    If there are multiple elements obeying the predicate, the choice is nondeterministic.

    This method will use abort signalling capabilities. This means that splitters may send and read abort signals.

    pred

    predicate used to test the elements

    returns

    an option value with the element if such an element exists, or None otherwise

    Definition Classes
    ParIterableLikeGenTraversableOnce
  44. def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): `GenMap`[B]

    [use case] Builds a new collection by applying a function to all elements of this general map and using the elements of the resulting collections.

    [use case]

    Builds a new collection by applying a function to all elements of this general map and using the elements of the resulting collections.

    For example:

    def getWords(lines: Seq[String]): Seq[String] = lines flatMap (line => line split "\\W+")

    The type of the resulting collection is guided by the static type of general map. This might cause unexpected results sometimes. For example:

    // lettersOf will return a Seq[Char] of likely repeated letters, instead of a Set
    def lettersOf(words: Seq[String]) = words flatMap (word => word.toSet)
    
    // lettersOf will return a Set[Char], not a Seq
    def lettersOf(words: Seq[String]) = words.toSet flatMap (word => word.toSeq)
    
    // xs will be a an Iterable[Int]
    val xs = Map("a" -> List(11,111), "b" -> List(22,222)).flatMap(_._2)
    
    // ys will be a Map[Int, Int]
    val ys = Map("a" -> List(1 -> 11,1 -> 111), "b" -> List(2 -> 22,2 -> 222)).flatMap(_._2)
    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

    a new general map resulting from applying the given collection-valued function f to each element of this general map and concatenating the results.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Full Signature

    def flatMap[S, That](f: ((K, V)) ⇒ GenTraversableOnce[S])(implicit bf: CanBuildFrom[Repr, S, That]): That

  45. def fold[U >: (K, V)](z: U)(op: (U, U) ⇒ U): U

    Folds the elements of this sequence using the specified associative binary operator.

    Folds the elements of this sequence using the specified associative binary operator. The order in which the elements are reduced is unspecified and may be nondeterministic.

    Note this method has a different signature than the foldLeft and foldRight methods of the trait Traversable. The result of folding may only be a supertype of this parallel collection's type parameter T.

    U

    a type parameter for the binary operator, a supertype of T.

    z

    a neutral element for the fold operation, it may be added to the result an arbitrary number of times, not changing the result (e.g. Nil for list concatenation, 0 for addition, or 1 for multiplication)

    op

    a binary operator that must be associative

    returns

    the result of applying fold operator op between all the elements and z

    Definition Classes
    ParIterableLikeGenTraversableOnce
  46. def foldLeft[S](z: S)(op: (S, (K, V)) ⇒ S): S

    Applies a binary operator to a start value and all elements of this general map, going left to right.

    Applies a binary operator to a start value and all elements of this general map, going left to right.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered. or the operator is associative and commutative.

    z

    the start value.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this general map, going left to right with the start value z on the left:

    op(...op(z, x_1), x_2, ..., x_n)

    where x1, ..., xn are the elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  47. def foldRight[S](z: S)(op: ((K, V), S) ⇒ S): S

    Applies a binary operator to all elements of this general map and a start value, going right to left.

    Applies a binary operator to all elements of this general map and a start value, going right to left.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered. or the operator is associative and commutative.

    z

    the start value.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this general map, going right to left with the start value z on the right:

    op(x_1, op(x_2, ... op(x_n, z)...))

    where x1, ..., xn are the elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  48. def forall(pred: ((K, V)) ⇒ Boolean): Boolean

    Tests whether a predicate holds for all elements of this general map.

    Tests whether a predicate holds for all elements of this general map.

    This method will use abort signalling capabilities. This means that splitters may send and read abort signals.

    pred

    a predicate used to test elements

    returns

    true if p holds for all elements, false otherwise

    Definition Classes
    ParIterableLikeGenTraversableOnce
  49. def foreach[U](f: ((K, V)) ⇒ U): Unit

    Applies a function f to all the elements of general map in a sequential order.

    Applies a function f to all the elements of general map in a sequential order.

    U

    the result type of the function applied to each element, which is always discarded

    f

    function applied to each element

    Definition Classes
    ParIterableLikeGenTraversableLikeGenTraversableOnce
  50. def formatted(fmtstr: String): String

    Returns string formatted according to given format string.

    Returns string formatted according to given format string. Format strings are as for String.format (@see java.lang.String.format).

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to StringFormat performed by method any2stringfmt in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  51. final def getClass(): Class[_]

    A representation that corresponds to the dynamic class of the receiver object.

    A representation that corresponds to the dynamic class of the receiver object.

    The nature of the representation is platform dependent.

    returns

    a representation that corresponds to the dynamic class of the receiver object.

    Definition Classes
    AnyRef → Any
    Note

    not specified by SLS as a member of AnyRef

  52. def getOrElse(key: A, default: ⇒ B): B

    [use case] Returns the value associated with a key, or a default value if the key is not contained in the map.

    [use case]

    Returns the value associated with a key, or a default value if the key is not contained in the map.

    key

    the key.

    default

    a computation that yields a default value in case no binding for key is found in the map.

    returns

    the value associated with key if it exists, otherwise the result of the default computation.

    Definition Classes
    ParMapLikeGenMapLike
    Full Signature

    def getOrElse[U >: V](key: K, default: ⇒ U): U

  53. def groupBy[K](f: ((K, V)) ⇒ K): ParMap[K, Repr]

    Partitions this general map into a map of general maps according to some discriminator function.

    Partitions this general map into a map of general maps according to some discriminator function.

    Note: this method is not re-implemented by views. This means when applied to a view it will always force the view and return a new general map.

    K

    the type of keys returned by the discriminator function.

    f

    the discriminator function.

    returns

    A map from keys to general maps such that the following invariant holds:

    (xs partition f)(k) = xs filter (x => f(x) == k)

    That is, every key k is bound to a general map of those elements x for which f(x) equals k.

    Definition Classes
    ParIterableLikeGenTraversableLike
  54. def hasDefiniteSize: Boolean

    Definition Classes
    ParIterableLikeGenTraversableOnce
  55. def hashCode(): Int

    The hashCode method for reference types.

    The hashCode method for reference types. See hashCode in Any.

    returns

    the hash code value for this object.

    Definition Classes
    GenMapLike → AnyRef → Any
  56. def head: (K, V)

    Selects the first element of this general map.

    Selects the first element of this general map.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    the first element of this general map.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Exceptions thrown
    `NoSuchElementException`

    if the general map is empty.

  57. def headOption: Option[(K, V)]

    Optionally selects the first element.

    Optionally selects the first element.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    the first element of this general map if it is nonempty, None if it is empty.

    Definition Classes
    ParIterableLikeGenTraversableLike
  58. def ifParSeq[R](isbody: (ParSeq[(K, V)]) ⇒ R): Otherwise[R]

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to TraversableOps[(K, V)] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  59. def init: Repr

    Selects all elements except the last.

    Selects all elements except the last.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    a general map consisting of all elements of this general map except the last one.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Exceptions thrown
    `UnsupportedOperationException`

    if the general map is empty.

  60. def initTaskSupport(): Unit

    Attributes
    protected
    Definition Classes
    ParIterableLike
  61. def isDefinedAt(key: K): Boolean

    Tests whether this map contains a binding for a key.

    Tests whether this map contains a binding for a key. This method, which implements an abstract method of trait PartialFunction, is equivalent to contains.

    key

    the key

    returns

    true if there is a binding for key in this map, false otherwise.

    Definition Classes
    ParMapLikeGenMapLike
  62. def isEmpty: Boolean

    Tests whether the general map is empty.

    Tests whether the general map is empty.

    returns

    true if the general map contains no elements, false otherwise.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  63. final def isInstanceOf[T0]: Boolean

    Test whether the dynamic type of the receiver object is T0.

    Test whether the dynamic type of the receiver object is T0.

    Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression 1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the specified type.

    returns

    true if the receiver object is an instance of erasure of type T0; false otherwise.

    Definition Classes
    Any
  64. def isParIterable: Boolean

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to TraversableOps[(K, V)] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  65. def isParSeq: Boolean

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to TraversableOps[(K, V)] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  66. def isParallel: Boolean

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to TraversableOps[(K, V)] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  67. def isStrictSplitterCollection: Boolean

    Denotes whether this parallel collection has strict splitters.

    Denotes whether this parallel collection has strict splitters.

    This is true in general, and specific collection instances may choose to override this method. Such collections will fail to execute methods which rely on splitters being strict, i.e. returning a correct value in the remaining method.

    This method helps ensure that such failures occur on method invocations, rather than later on and in unpredictable ways.

    Definition Classes
    ParIterableLike
  68. final def isTraversableAgain: Boolean

    Tests whether this general map can be repeatedly traversed.

    Tests whether this general map can be repeatedly traversed.

    returns

    true

    Definition Classes
    ParIterableLikeGenTraversableLikeGenTraversableOnce
  69. def iterator: Splitter[(K, V)]

    Creates a new split iterator used to traverse the elements of this collection.

    Creates a new split iterator used to traverse the elements of this collection.

    By default, this method is implemented in terms of the protected splitter method.

    returns

    a split iterator

    Definition Classes
    ParIterableLikeGenIterableLike
  70. def keySet: ParSet[K]

    Definition Classes
    ParMapLikeGenMapLike
  71. def keys: ParIterable[K]

    Collects all keys of this map in an iterable collection.

    Collects all keys of this map in an iterable collection.

    returns

    the keys of this map as an iterable.

    Definition Classes
    ParMapLikeGenMapLike
  72. def keysIterator: IterableSplitter[K]

    Creates an iterator for all keys.

    Creates an iterator for all keys.

    returns

    an iterator over all keys.

    Definition Classes
    ParMapLikeGenMapLike
  73. def last: (K, V)

    Selects the last element.

    Selects the last element.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    The last element of this general map.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Exceptions thrown
    NoSuchElementException

    If the general map is empty.

  74. def lastOption: Option[(K, V)]

    Optionally selects the last element.

    Optionally selects the last element.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    the last element of this general map$ if it is nonempty, None if it is empty.

    Definition Classes
    ParIterableLikeGenTraversableLike
  75. def map[B](f: (A) ⇒ B): `GenMap`[B]

    [use case] Builds a new collection by applying a function to all elements of this general map.

    [use case]

    Builds a new collection by applying a function to all elements of this general map.

    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

    a new general map resulting from applying the given function f to each element of this general map and collecting the results.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Full Signature

    def map[S, That](f: ((K, V)) ⇒ S)(implicit bf: CanBuildFrom[Repr, S, That]): That

  76. def mapValues[S](f: (V) ⇒ S): ParMap[K, S]

    Transforms this map by applying a function to every retrieved value.

    Transforms this map by applying a function to every retrieved value.

    f

    the function used to transform values of this map.

    returns

    a map view which maps every key of this map to f(this(key)). The resulting map wraps the original map without copying any elements.

    Definition Classes
    ParMapLikeGenMapLike
  77. def max: A

    [use case] Finds the largest element.

    [use case]

    Finds the largest element.

    returns

    the largest element of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def max[U >: (K, V)](implicit ord: Ordering[U]): (K, V)

  78. def maxBy[S](f: ((K, V)) ⇒ S)(implicit cmp: Ordering[S]): (K, V)

    Definition Classes
    ParIterableLikeGenTraversableOnce
  79. def min: A

    [use case] Finds the smallest element.

    [use case]

    Finds the smallest element.

    returns

    the smallest element of this general map

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def min[U >: (K, V)](implicit ord: Ordering[U]): (K, V)

  80. def minBy[S](f: ((K, V)) ⇒ S)(implicit cmp: Ordering[S]): (K, V)

    Definition Classes
    ParIterableLikeGenTraversableOnce
  81. def mkString: String

    Displays all elements of this general map in a string.

    Displays all elements of this general map in a string.

    returns

    a string representation of this general map. In the resulting string the string representations (w.r.t. the method toString) of all elements of this general map follow each other without any separator string.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  82. def mkString(sep: String): String

    Displays all elements of this general map in a string using a separator string.

    Displays all elements of this general map in a string using a separator string.

    sep

    the separator string.

    returns

    a string representation of this general map. In the resulting string the string representations (w.r.t. the method toString) of all elements of this general map are separated by the string sep.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Example:
    1. List(1, 2, 3).mkString("|") = "1|2|3"

  83. def mkString(start: String, sep: String, end: String): String

    Displays all elements of this general map in a string using start, end, and separator strings.

    Displays all elements of this general map in a string using start, end, and separator strings.

    start

    the starting string.

    sep

    the separator string.

    end

    the ending string.

    returns

    a string representation of this general map. The resulting string begins with the string start and ends with the string end. Inside, the string representations (w.r.t. the method toString) of all elements of this general map are separated by the string sep.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Example:
    1. List(1, 2, 3).mkString("(", "; ", ")") = "(1; 2; 3)"

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

    Equivalent to !(this eq that).

    Equivalent to !(this eq that).

    returns

    true if the argument is not a reference to the receiver object; false otherwise.

    Definition Classes
    AnyRef
  85. def nonEmpty: Boolean

    Tests whether the general map is not empty.

    Tests whether the general map is not empty.

    returns

    true if the general map contains at least one element, false otherwise.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  86. final def notify(): Unit

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Definition Classes
    AnyRef
    Note

    not specified by SLS as a member of AnyRef

  87. final def notifyAll(): Unit

    Wakes up all threads that are waiting on the receiver object's monitor.

    Wakes up all threads that are waiting on the receiver object's monitor.

    Definition Classes
    AnyRef
    Note

    not specified by SLS as a member of AnyRef

  88. def par: Repr

    Returns a parallel implementation of this collection.

    Returns a parallel implementation of this collection.

    For most collection types, this method creates a new parallel collection by copying all the elements. For these collection, par takes linear time. Mutable collections in this category do not produce a mutable parallel collection that has the same underlying dataset, so changes in one collection will not be reflected in the other one.

    Specific collections (e.g. ParArray or mutable.ParHashMap) override this default behaviour by creating a parallel collection which shares the same underlying dataset. For these collections, par takes constant or sublinear time.

    All parallel collections return a reference to themselves.

    returns

    a parallel implementation of this collection

    Definition Classes
    ParIterableLikeCustomParallelizableParallelizable
  89. def parCombiner: Combiner[(K, V), Repr]

    The default par implementation uses the combiner provided by this method to create a new parallel collection.

    The default par implementation uses the combiner provided by this method to create a new parallel collection.

    returns

    a combiner for the parallel collection of type ParRepr

    Attributes
    protected[this]
    Definition Classes
    CustomParallelizableParallelizable
  90. def partition(pred: ((K, V)) ⇒ Boolean): (Repr, Repr)

    Partitions this general map in two general maps according to a predicate.

    Partitions this general map in two general maps according to a predicate.

    pred

    the predicate on which to partition.

    returns

    a pair of general maps: the first general map consists of all elements that satisfy the predicate p and the second general map consists of all elements that don't. The relative order of the elements in the resulting general maps may not be preserved.

    Definition Classes
    ParIterableLikeGenTraversableLike
  91. def product: A

    [use case] Multiplies up the elements of this collection.

    [use case]

    Multiplies up the elements of this collection.

    returns

    the product of all elements in this general map of numbers of type Int. Instead of Int, any other type T with an implicit Numeric[T] implementation can be used as element type of the general map and as result type of product. Examples of such types are: Long, Float, Double, BigInt.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def product[U >: (K, V)](implicit num: Numeric[U]): U

  92. def reduce[U >: (K, V)](op: (U, U) ⇒ U): U

    Reduces the elements of this sequence using the specified associative binary operator.

    Reduces the elements of this sequence using the specified associative binary operator.

    The order in which operations are performed on elements is unspecified and may be nondeterministic.

    Note this method has a different signature than the reduceLeft and reduceRight methods of the trait Traversable. The result of reducing may only be a supertype of this parallel collection's type parameter T.

    U

    A type parameter for the binary operator, a supertype of T.

    op

    A binary operator that must be associative.

    returns

    The result of applying reduce operator op between all the elements if the collection is nonempty.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Exceptions thrown
    UnsupportedOperationException

    if this general map is empty.

  93. def reduceLeft[U >: (K, V)](op: (U, (K, V)) ⇒ U): U

    Definition Classes
    ParIterableLike
  94. def reduceLeftOption[U >: (K, V)](op: (U, (K, V)) ⇒ U): Option[U]

    Optionally applies a binary operator to all elements of this general map, going left to right.

    Optionally applies a binary operator to all elements of this general map, going left to right.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered. or the operator is associative and commutative.

    op

    the binary operator.

    returns

    an option value containing the result of reduceLeft(op) is this general map is nonempty, None otherwise.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  95. def reduceOption[U >: (K, V)](op: (U, U) ⇒ U): Option[U]

    Optionally reduces the elements of this sequence using the specified associative binary operator.

    Optionally reduces the elements of this sequence using the specified associative binary operator.

    The order in which operations are performed on elements is unspecified and may be nondeterministic.

    Note this method has a different signature than the reduceLeftOption and reduceRightOption methods of the trait Traversable. The result of reducing may only be a supertype of this parallel collection's type parameter T.

    U

    A type parameter for the binary operator, a supertype of T.

    op

    A binary operator that must be associative.

    returns

    An option value containing result of applying reduce operator op between all the elements if the collection is nonempty, and None otherwise.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  96. def reduceRight[U >: (K, V)](op: ((K, V), U) ⇒ U): U

    Applies a binary operator to all elements of this general map, going right to left.

    Applies a binary operator to all elements of this general map, going right to left.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered. or the operator is associative and commutative.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this general map, going right to left:

    op(x_1, op(x_2, ..., op(x_{n-1}, x_n)...))

    where x1, ..., xn are the elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Exceptions thrown
    `UnsupportedOperationException`

    if this general map is empty.

  97. def reduceRightOption[U >: (K, V)](op: ((K, V), U) ⇒ U): Option[U]

    Optionally applies a binary operator to all elements of this general map, going right to left.

    Optionally applies a binary operator to all elements of this general map, going right to left.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered. or the operator is associative and commutative.

    op

    the binary operator.

    returns

    an option value containing the result of reduceRight(op) is this general map is nonempty, None otherwise.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  98. def repr: Repr

    Definition Classes
    ParIterableLikeGenTraversableLike
  99. def reuse[S, That](oldc: Option[Combiner[S, That]], newc: Combiner[S, That]): Combiner[S, That]

    Optionally reuses an existing combiner for better performance.

    Optionally reuses an existing combiner for better performance. By default it doesn't - subclasses may override this behaviour. The provided combiner oldc that can potentially be reused will be either some combiner from the previous computational task, or None if there was no previous phase (in which case this method must return newc).

    oldc

    The combiner that is the result of the previous task, or None if there was no previous task.

    newc

    The new, empty combiner that can be used.

    returns

    Either newc or oldc.

    Attributes
    protected
    Definition Classes
    ParIterableLike
  100. def sameElements(that: GenIterable[A]): Boolean

    [use case] Checks if the other iterable collection contains the same elements in the same order as this general map.

    [use case]

    Checks if the other iterable collection contains the same elements in the same order as this general map.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    Note: will not terminate for infinite-sized collections.

    that

    the collection to compare with.

    returns

    true, if both collections contain the same elements in the same order, false otherwise.

    Definition Classes
    ParIterableLikeGenIterableLike
    Full Signature

    def sameElements[U >: (K, V)](that: GenIterable[U]): Boolean

  101. def scan(z: (K, V))(op: ((K, V), (K, V)) ⇒ (K, V)): `GenMap`[(K, V)]

    [use case] Computes a prefix scan of the elements of the collection.

    [use case]

    Computes a prefix scan of the elements of the collection.

    Note: The neutral element z may be applied more than once.

    z

    neutral element for the operator op

    op

    the associative operator for the scan

    returns

    a new general map containing the prefix scan of the elements in this general map

    Definition Classes
    ParIterableLikeGenTraversableLike
    Full Signature

    def scan[U >: (K, V), That](z: U)(op: (U, U) ⇒ U)(implicit bf: CanBuildFrom[Repr, U, That]): That

  102. def scanBlockSize: Int

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  103. def scanLeft[S, That](z: S)(op: (S, (K, V)) ⇒ S)(implicit bf: CanBuildFrom[Repr, S, That]): That

    Produces a collection containing cumulative results of applying the operator going left to right.

    Produces a collection containing cumulative results of applying the operator going left to right.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    That

    the actual type of the resulting collection

    z

    the initial value

    op

    the binary operator applied to the intermediate result and the element

    bf

    an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.

    returns

    collection with intermediate results

    Definition Classes
    ParIterableLikeGenTraversableLike
  104. def scanRight[S, That](z: S)(op: ((K, V), S) ⇒ S)(implicit bf: CanBuildFrom[Repr, S, That]): That

    Produces a collection containing cumulative results of applying the operator going right to left.

    Produces a collection containing cumulative results of applying the operator going right to left. The head of the collection is the last cumulative result.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    Example:

    List(1, 2, 3, 4).scanRight(0)(_ + _) == List(10, 9, 7, 4, 0)
    That

    the actual type of the resulting collection

    z

    the initial value

    op

    the binary operator applied to the intermediate result and the element

    bf

    an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.

    returns

    collection with intermediate results

    Definition Classes
    ParIterableLikeGenTraversableLike
  105. def sequentially[S, That <: Parallel](b: (Sequential) ⇒ Parallelizable[S, That]): Repr

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  106. def slice(unc_from: Int, unc_until: Int): Repr

    Selects an interval of elements.

    Selects an interval of elements. The returned collection is made up of all elements x which satisfy the invariant:

    from <= indexOf(x) < until

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    unc_from

    the lowest index to include from this general map.

    unc_until

    the lowest index to EXCLUDE from this general map.

    returns

    a general map containing the elements greater than or equal to index from extending up to (but not including) index until of this general map.

    Definition Classes
    ParIterableLikeGenTraversableLike
  107. def span(pred: ((K, V)) ⇒ Boolean): (Repr, Repr)

    Splits this general map into a prefix/suffix pair according to a predicate.

    Splits this general map into a prefix/suffix pair according to a predicate.

    This method will use indexFlag signalling capabilities. This means that splitters may set and read the indexFlag state. The index flag is initially set to maximum integer value.

    pred

    the predicate used to test the elements

    returns

    a pair consisting of the longest prefix of the collection for which all the elements satisfy pred, and the rest of the collection

    Definition Classes
    ParIterableLikeGenTraversableLike
  108. def splitAt(n: Int): (Repr, Repr)

    Splits this general map into two at a given position.

    Splits this general map into two at a given position. Note: c splitAt n is equivalent to (but possibly more efficient than) (c take n, c drop n).

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    n

    the position at which to split.

    returns

    a pair of general maps consisting of the first n elements of this general map, and the other elements.

    Definition Classes
    ParIterableLikeGenTraversableLike
  109. def sum: A

    [use case] Sums up the elements of this collection.

    [use case]

    Sums up the elements of this collection.

    returns

    the sum of all elements in this general map of numbers of type Int. Instead of Int, any other type T with an implicit Numeric[T] implementation can be used as element type of the general map and as result type of sum. Examples of such types are: Long, Float, Double, BigInt.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def sum[U >: (K, V)](implicit num: Numeric[U]): U

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

    Definition Classes
    AnyRef
  111. def tail: Repr

    Selects all elements except the first.

    Selects all elements except the first.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    a general map consisting of all elements of this general map except the first one.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Exceptions thrown
    `UnsupportedOperationException`

    if the general map is empty.

  112. def take(n: Int): Repr

    Selects first n elements.

    Selects first n elements.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    n

    Tt number of elements to take from this general map.

    returns

    a general map consisting only of the first n elements of this general map, or else the whole general map, if it has less than n elements.

    Definition Classes
    ParIterableLikeGenTraversableLike
  113. def takeWhile(pred: ((K, V)) ⇒ Boolean): Repr

    Takes the longest prefix of elements that satisfy the predicate.

    Takes the longest prefix of elements that satisfy the predicate.

    This method will use indexFlag signalling capabilities. This means that splitters may set and read the indexFlag state. The index flag is initially set to maximum integer value.

    pred

    the predicate used to test the elements

    returns

    the longest prefix of this general map of elements that satisy the predicate pred

    Definition Classes
    ParIterableLikeGenTraversableLike
  114. implicit def task2ops[R, Tp](tsk: SSCTask[R, Tp]): TaskOps[R, Tp]

    Attributes
    protected
    Definition Classes
    ParIterableLike
  115. def tasksupport: TaskSupport

    Definition Classes
    ParIterableLike
  116. def tasksupport_=(ts: TaskSupport): Unit

    Definition Classes
    ParIterableLike
  117. def to[Col[_]]: Col[A]

    [use case] Converts this general map into another by copying all elements.

    [use case]

    Converts this general map into another by copying all elements.

    Note: will not terminate for infinite-sized collections.

    Col

    The collection type to build.

    returns

    a new collection containing all elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def to[Col[_]](implicit cbf: CanBuildFrom[Nothing, (K, V), Col[(K, V)]]): Col[(K, V)]

  118. def toArray: Array[A]

    [use case] Converts this general map to an array.

    [use case]

    Converts this general map to an array.

    Note: will not terminate for infinite-sized collections.

    returns

    an array containing all elements of this general map. An ClassTag must be available for the element type of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def toArray[U >: (K, V)](implicit arg0: ClassTag[U]): Array[U]

  119. def toBuffer[U >: (K, V)]: Buffer[U]

    Converts this general map to a mutable buffer.

    Converts this general map to a mutable buffer.

    Note: will not terminate for infinite-sized collections.

    returns

    a buffer containing all elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  120. def toIndexedSeq: IndexedSeq[(K, V)]

    Converts this general map to an indexed sequence.

    Converts this general map to an indexed sequence.

    Note: will not terminate for infinite-sized collections.

    returns

    an indexed sequence containing all elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  121. def toIterable: ParIterable[(K, V)]

    Converts this general map to an iterable collection.

    Converts this general map to an iterable collection. Note that the choice of target Iterable is lazy in this default implementation as this TraversableOnce may be lazy and unevaluated (i.e. it may be an iterator which is only traversable once).

    Note: will not terminate for infinite-sized collections.

    returns

    an Iterable containing all elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  122. def toIterator: Iterator[(K, V)]

    Returns an Iterator over the elements in this general map.

    Returns an Iterator over the elements in this general map. Will return the same Iterator if this instance is already an Iterator.

    Note: will not terminate for infinite-sized collections.

    returns

    an Iterator containing all elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  123. def toList: List[(K, V)]

    Converts this general map to a list.

    Converts this general map to a list.

    Note: will not terminate for infinite-sized collections.

    returns

    a list containing all elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  124. def toMap[T, U]: Map[T, U]

    [use case] Converts this general map to a map.

    [use case]

    Converts this general map to a map. This method is unavailable unless the elements are members of Tuple2, each ((T, U)) becoming a key-value pair in the map. Duplicate keys will be overwritten by later keys: if this is an unordered collection, which key is in the resulting map is undefined.

    Note: will not terminate for infinite-sized collections.

    returns

    a map of type immutable.Map[T, U] containing all key/value pairs of type (T, U) of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def toMap[K, V](implicit ev: <:<[(K, V), (K, V)]): ParMap[K, V]

  125. def toParArray: ParArray[(K, V)]

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to TraversableOps[(K, V)] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  126. def toParCollection[U >: (K, V), That](cbf: () ⇒ Combiner[U, That]): That

    Attributes
    protected
    Definition Classes
    ParIterableLike
  127. def toParMap[K, V, That](cbf: () ⇒ Combiner[(K, V), That])(implicit ev: <:<[(K, V), (K, V)]): That

    Attributes
    protected
    Definition Classes
    ParIterableLike
  128. def toSeq: ParSeq[(K, V)]

    Converts this general map to a sequence.

    Converts this general map to a sequence. As with toIterable, it's lazy in this default implementation, as this TraversableOnce may be lazy and unevaluated.

    Note: will not terminate for infinite-sized collections.

    returns

    a sequence containing all elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  129. def toSet[U >: (K, V)]: ParSet[U]

    Converts this general map to a set.

    Converts this general map to a set.

    Note: will not terminate for infinite-sized collections.

    returns

    a set containing all elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  130. def toStream: Stream[(K, V)]

    Converts this general map to a stream.

    Converts this general map to a stream.

    Note: will not terminate for infinite-sized collections.

    returns

    a stream containing all elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  131. def toString(): String

    Creates a String representation of this object.

    Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.

    returns

    a String representation of the object.

    Definition Classes
    ParIterableLike → AnyRef → Any
  132. def toTraversable: GenTraversable[(K, V)]

    Converts this general map to an unspecified Traversable.

    Converts this general map to an unspecified Traversable. Will return the same collection if this instance is already Traversable.

    Note: will not terminate for infinite-sized collections.

    returns

    a Traversable containing all elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  133. def toVector: Vector[(K, V)]

    Converts this general map to a Vector.

    Converts this general map to a Vector.

    Note: will not terminate for infinite-sized collections.

    returns

    a vector containing all elements of this general map.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  134. def values: ParIterable[V]

    Collects all values of this map in an iterable collection.

    Collects all values of this map in an iterable collection.

    returns

    the values of this map as an iterable.

    Definition Classes
    ParMapLikeGenMapLike
  135. def valuesIterator: IterableSplitter[V]

    Creates an iterator for all values in this map.

    Creates an iterator for all values in this map.

    returns

    an iterator over all values that are associated with some key in this map.

    Definition Classes
    ParMapLikeGenMapLike
  136. def view: ParIterableView[(K, V), Repr, Sequential]

    Definition Classes
    ParIterableLike
  137. final def wait(): Unit

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

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

    Definition Classes
    AnyRef
    Annotations
    @throws()
  140. def wrap[R](body: ⇒ R): NonDivisible[R]

    Attributes
    protected
    Definition Classes
    ParIterableLike
  141. def zip[B](that: GenIterable[B]): `GenMap`[(A, B)]

    [use case] Returns a general map formed from this general map and another iterable collection by combining corresponding elements in pairs.

    [use case]

    Returns a general map formed from this general map and another iterable collection by combining corresponding elements in pairs. If one of the two collections is longer than the other, its remaining elements are ignored.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    B

    the type of the second half of the returned pairs

    that

    The iterable providing the second half of each result pair

    returns

    a new general map containing pairs consisting of corresponding elements of this general map and that. The length of the returned collection is the minimum of the lengths of this general map and that.

    Definition Classes
    ParIterableLikeGenIterableLike
    Full Signature

    def zip[U >: (K, V), S, That](that: GenIterable[S])(implicit bf: CanBuildFrom[Repr, (U, S), That]): That

  142. def zipAll[B](that: Iterable[B], thisElem: A, thatElem: B): `GenMap`[(A, B)]

    [use case] Returns a general map formed from this general map and another iterable collection by combining corresponding elements in pairs.

    [use case]

    Returns a general map formed from this general map and another iterable collection by combining corresponding elements in pairs. If one of the two collections is shorter than the other, placeholder elements are used to extend the shorter collection to the length of the longer.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    B

    the type of the second half of the returned pairs

    that

    The iterable providing the second half of each result pair

    thisElem

    the element to be used to fill up the result if this general map is shorter than that.

    thatElem

    the element to be used to fill up the result if that is shorter than this general map.

    returns

    a new general map containing pairs consisting of corresponding elements of this general map and that. The length of the returned collection is the maximum of the lengths of this general map and that. If this general map is shorter than that, thisElem values are used to pad the result. If that is shorter than this general map, thatElem values are used to pad the result.

    Definition Classes
    ParIterableLikeGenIterableLike
    Full Signature

    def zipAll[S, U >: (K, V), That](that: GenIterable[S], thisElem: U, thatElem: S)(implicit bf: CanBuildFrom[Repr, (U, S), That]): That

  143. def zipWithIndex: `GenMap`[(A, Int)]

    [use case] Zips this general map with its indices.

    [use case]

    Zips this general map with its indices.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

    A new general map containing pairs consisting of all elements of this general map paired with their index. Indices start at 0.

    Definition Classes
    ParIterableLikeGenIterableLike
    Full Signature

    def zipWithIndex[U >: (K, V), That](implicit bf: CanBuildFrom[Repr, (U, Int), That]): That

    Example:
    1. List("a", "b", "c").zipWithIndex = List(("a", 0), ("b", 1), ("c", 2))

  144. def [B](y: B): (ParMapLike[K, V, Repr, Sequential], B)

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to ArrowAssoc[ParMapLike[K, V, Repr, Sequential]] performed by method any2ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Shadowed Implict Value Members

  1. def +(other: String): String

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to StringAdd performed by method any2stringadd in scala.Predef.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
    To access this member you can use a type ascription:
    (parMapLike: StringAdd).+(other)
    Definition Classes
    StringAdd
  2. val self: Any

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to StringAdd performed by method any2stringadd in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
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    Definition Classes
    StringAdd
  3. val self: Any

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to StringFormat performed by method any2stringfmt in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
    (parMapLike: StringFormat).self
    Definition Classes
    StringFormat

Deprecated Value Members

  1. def /:\[A1 >: (K, V)](z: A1)(op: (A1, A1) ⇒ A1): A1

    A syntactic sugar for out of order folding.

    A syntactic sugar for out of order folding. See fold.

    Example:

    scala> val a = LinkedList(1,2,3,4)
    a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)
    
    scala> val b = (a /:\ 5)(_+_)
    b: Int = 15
    Definition Classes
    GenTraversableOnce
    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.0) use fold instead

  2. def x: ParMapLike[K, V, Repr, Sequential]

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to ArrowAssoc[ParMapLike[K, V, Repr, Sequential]] performed by method any2ArrowAssoc in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
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    Definition Classes
    ArrowAssoc
    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.0) Use leftOfArrow instead

  3. def x: ParMapLike[K, V, Repr, Sequential]

    Implicit information
    This member is added by an implicit conversion from ParMapLike[K, V, Repr, Sequential] to Ensuring[ParMapLike[K, V, Repr, Sequential]] performed by method any2Ensuring in scala.Predef.
    Shadowing
    This implicitly inherited member is ambiguous. One or more implicitly inherited members have similar signatures, so calling this member may produce an ambiguous implicit conversion compiler error.
    To access this member you can use a type ascription:
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    Definition Classes
    Ensuring
    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.0) Use resultOfEnsuring instead

Inherited from ParIterableLike[(K, V), Repr, Sequential]

Inherited from HasNewCombiner[(K, V), Repr]

Inherited from Parallel

Inherited from CustomParallelizable[(K, V), Repr]

Inherited from GenMapLike[K, V, Repr]

Inherited from Equals

Inherited from GenIterableLike[(K, V), Repr]

Inherited from GenTraversableLike[(K, V), Repr]

Inherited from Parallelizable[(K, V), Repr]

Inherited from GenTraversableOnce[(K, V)]

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion traversable2ops from ParMapLike[K, V, Repr, Sequential] to TraversableOps[(K, V)]

Inherited by implicit conversion any2stringadd from ParMapLike[K, V, Repr, Sequential] to StringAdd

Inherited by implicit conversion any2stringfmt from ParMapLike[K, V, Repr, Sequential] to StringFormat

Inherited by implicit conversion any2ArrowAssoc from ParMapLike[K, V, Repr, Sequential] to ArrowAssoc[ParMapLike[K, V, Repr, Sequential]]

Inherited by implicit conversion any2Ensuring from ParMapLike[K, V, Repr, Sequential] to Ensuring[ParMapLike[K, V, Repr, Sequential]]