Packages

class ParVector[+T] extends ParSeq[T] with GenericParTemplate[T, ParVector] with ParSeqLike[T, ParVector[T], immutable.Vector[T]] with Serializable

Immutable parallel vectors, based on vectors.

This is a base trait for Scala parallel collections. It defines behaviour common to all parallel collections. Concrete parallel collections should inherit this trait and ParIterable if they want to define specific combiner factories.

Parallel operations are implemented with divide and conquer style algorithms that parallelize well. The basic idea is to split the collection into smaller parts until they are small enough to be operated on sequentially.

All of the parallel operations are implemented as tasks within this trait. Tasks rely on the concept of splitters, which extend iterators. Every parallel collection defines:

def splitter: IterableSplitter[T]

which returns an instance of IterableSplitter[T], which is a subtype of Splitter[T]. Splitters have a method remaining to check the remaining number of elements, and method split which is defined by splitters. Method split divides the splitters iterate over into disjunct subsets:

def split: Seq[Splitter]

which splits the splitter into a sequence of disjunct subsplitters. This is typically a very fast operation which simply creates wrappers around the receiver collection. This can be repeated recursively.

Tasks are scheduled for execution through a scala.collection.parallel.TaskSupport object, which can be changed through the tasksupport setter of the collection.

Method newCombiner produces a new combiner. Combiners are an extension of builders. They provide a method combine which combines two combiners and returns a combiner containing elements of both combiners. This method can be implemented by aggressively copying all the elements into the new combiner or by lazily binding their results. It is recommended to avoid copying all of the elements for performance reasons, although that cost might be negligible depending on the use case. Standard parallel collection combiners avoid copying when merging results, relying either on a two-step lazy construction or specific data-structure properties.

Methods:

def seq: Sequential
def par: Repr

produce the sequential or parallel implementation of the collection, respectively. Method par just returns a reference to this parallel collection. Method seq is efficient - it will not copy the elements. Instead, it will create a sequential version of the collection using the same underlying data structure. Note that this is not the case for sequential collections in general - they may copy the elements and produce a different underlying data structure.

The combination of methods toMap, toSeq or toSet along with par and seq is a flexible way to change between different collection types.

Since this trait extends the GenIterable trait, methods like size must also be implemented in concrete collections, while iterator forwards to splitter by default.

Each parallel collection is bound to a specific fork/join pool, on which dormant worker threads are kept. The fork/join pool contains other information such as the parallelism level, that is, the number of processors used. When a collection is created, it is assigned the default fork/join pool found in the scala.parallel package object.

Parallel collections are not necessarily ordered in terms of the foreach operation (see Traversable). Parallel sequences have a well defined order for iterators - creating an iterator and traversing the elements linearly will always yield the same order. However, bulk operations such as foreach, map or filter always occur in undefined orders for all parallel collections.

Existing parallel collection implementations provide strict parallel iterators. Strict parallel iterators are aware of the number of elements they have yet to traverse. It's also possible to provide non-strict parallel iterators, which do not know the number of elements remaining. To do this, the new collection implementation must override isStrictSplitterCollection to false. This will make some operations unavailable.

To create a new parallel collection, extend the ParIterable trait, and implement size, splitter, newCombiner and seq. Having an implicit combiner factory requires extending this trait in addition, as well as providing a companion object, as with regular collections.

Method size is implemented as a constant time operation for parallel collections, and parallel collection operations rely on this assumption.

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.

T

the element type of the vector

Source
ParVector.scala
Since

2.9

See also

Scala's Parallel Collections Library overview section on ParVector for more information.

Linear Supertypes
Serializable, java.io.Serializable, ParSeq[T], ParIterable[T], Immutable, parallel.ParSeq[T], ParSeqLike[T, ParVector[T], immutable.Vector[T]], parallel.ParIterable[T], ParIterableLike[T, ParVector[T], immutable.Vector[T]], Parallel, CustomParallelizable[T, ParVector[T]], GenericParTemplate[T, ParVector], HasNewCombiner[T, scala.collection.parallel.immutable.ParVector[T] @scala.annotation.unchecked.uncheckedVariance], GenSeq[T], GenIterable[T], GenTraversable[T], GenericTraversableTemplate[T, ParVector], HasNewBuilder[T, scala.collection.parallel.immutable.ParVector[T] @scala.annotation.unchecked.uncheckedVariance], GenSeqLike[T, ParVector[T]], Equals, GenIterableLike[T, ParVector[T]], GenTraversableLike[T, ParVector[T]], Parallelizable[T, ParVector[T]], GenTraversableOnce[T], AnyRef, Any
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Inherited
  1. ParVector
  2. Serializable
  3. Serializable
  4. ParSeq
  5. ParIterable
  6. Immutable
  7. ParSeq
  8. ParSeqLike
  9. ParIterable
  10. ParIterableLike
  11. Parallel
  12. CustomParallelizable
  13. GenericParTemplate
  14. HasNewCombiner
  15. GenSeq
  16. GenIterable
  17. GenTraversable
  18. GenericTraversableTemplate
  19. HasNewBuilder
  20. GenSeqLike
  21. Equals
  22. GenIterableLike
  23. GenTraversableLike
  24. Parallelizable
  25. GenTraversableOnce
  26. AnyRef
  27. Any
Implicitly
  1. by CollectionsHaveToParArray
  2. by any2stringadd
  3. by StringFormat
  4. by Ensuring
  5. by ArrowAssoc
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Instance Constructors

  1. new ParVector()
  2. new ParVector(vector: immutable.Vector[T])

Type Members

  1. class Aggregate [S] extends Accessor[S, Aggregate[S]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  2. trait BuilderOps [Elem, To] extends AnyRef
    Definition Classes
    ParIterableLike
  3. class Collect [S, That] extends Transformer[Combiner[S, That], Collect[S, That]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  4. abstract class Composite [FR, SR, R, First <: StrictSplitterCheckTask[FR, _], Second <: StrictSplitterCheckTask[SR, _]] extends NonDivisibleTask[R, Composite[FR, SR, R, First, Second]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  5. class Copy [U >: T, That] extends Transformer[Combiner[U, That], Copy[U, That]]
    Attributes
    protected
    Definition Classes
    ParIterableLike
  6. class CopyToArray [U >: T, This >: Repr] extends Accessor[Unit, CopyToArray[U, This]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  7. class Count extends Accessor[Int, Count]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  8. class CreateScanTree [U >: T] extends Transformer[ScanTree[U], CreateScanTree[U]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  9. class Drop [U >: T, This >: Repr] extends Transformer[Combiner[U, This], Drop[U, This]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  10. class Exists extends Accessor[Boolean, Exists]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  11. class Filter [U >: T, This >: Repr] extends Transformer[Combiner[U, This], Filter[U, This]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  12. class FilterNot [U >: T, This >: Repr] extends Transformer[Combiner[U, This], FilterNot[U, This]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  13. class Find [U >: T] extends Accessor[Option[U], Find[U]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  14. class FlatMap [S, That] extends Transformer[Combiner[S, That], FlatMap[S, That]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  15. class Fold [U >: T] extends Accessor[U, Fold[U]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  16. class Forall extends Accessor[Boolean, Forall]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  17. class Foreach [S] extends Accessor[Unit, Foreach[S]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  18. class FromScanTree [U >: T, That] extends StrictSplitterCheckTask[Combiner[U, That], FromScanTree[U, That]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  19. class GroupBy [K, U >: T] extends Transformer[HashMapCombiner[K, U], GroupBy[K, U]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  20. class Map [S, That] extends Transformer[Combiner[S, That], Map[S, That]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  21. class Max [U >: T] extends Accessor[Option[U], Max[U]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  22. class Min [U >: T] extends Accessor[Option[U], Min[U]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  23. trait NonDivisible [R] extends NonDivisibleTask[R, NonDivisible[R]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  24. trait NonDivisibleTask [R, Tp] extends StrictSplitterCheckTask[R, Tp]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  25. abstract class ParComposite [FR, SR, R, First <: StrictSplitterCheckTask[FR, _], Second <: StrictSplitterCheckTask[SR, _]] extends Composite[FR, SR, R, First, Second]

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

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

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  26. class Partition [U >: T, This >: Repr] extends Transformer[(Combiner[U, This], Combiner[U, This]), Partition[U, This]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  27. class Product [U >: T] extends Accessor[U, Product[U]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  28. class Reduce [U >: T] extends Accessor[Option[U], Reduce[U]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  29. abstract class ResultMapping [R, Tp, R1] extends NonDivisibleTask[R1, ResultMapping[R, Tp, R1]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  30. 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 scala.Product with Serializable
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  31. case class ScanNode [U >: T](left: ScanTree[U], right: ScanTree[U]) extends ScanTree[U] with scala.Product with Serializable
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  32. trait ScanTree [U >: T] extends AnyRef
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  33. abstract class SeqComposite [FR, SR, R, First <: StrictSplitterCheckTask[FR, _], Second <: StrictSplitterCheckTask[SR, _]] extends Composite[FR, SR, R, First, Second]

    Sequentially performs one task after another.

    Sequentially performs one task after another.

    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  34. trait SignallingOps [PI <: DelegatedSignalling] extends AnyRef
    Definition Classes
    ParIterableLike
  35. class Slice [U >: T, This >: Repr] extends Transformer[Combiner[U, This], Slice[U, This]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  36. class Span [U >: T, This >: Repr] extends Transformer[(Combiner[U, This], Combiner[U, This]), Span[U, This]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  37. class SplitAt [U >: T, This >: Repr] extends Transformer[(Combiner[U, This], Combiner[U, This]), SplitAt[U, This]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  38. trait StrictSplitterCheckTask [R, Tp] extends Task[R, Tp]
    Attributes
    protected
    Definition Classes
    ParIterableLike
  39. class Sum [U >: T] extends Accessor[U, Sum[U]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  40. class Take [U >: T, This >: Repr] extends Transformer[Combiner[U, This], Take[U, This]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  41. class TakeWhile [U >: T, This >: Repr] extends Transformer[(Combiner[U, This], Boolean), TakeWhile[U, This]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  42. trait TaskOps [R, Tp] extends AnyRef
    Definition Classes
    ParIterableLike
  43. class ToParCollection [U >: T, That] extends Transformer[Combiner[U, That], ToParCollection[U, That]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  44. class ToParMap [K, V, That] extends Transformer[Combiner[(K, V), That], ToParMap[K, V, That]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  45. class ZipAll [U >: T, S, That] extends Transformer[Combiner[(U, S), That], ZipAll[U, S, That]]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  46. trait Accessor [R, Tp] extends ParSeqLike.Accessor[R, Tp]
    Attributes
    protected
    Definition Classes
    ParSeqLike
  47. class Corresponds [S] extends Accessor[Boolean, Corresponds[S]]
    Attributes
    protected[this]
    Definition Classes
    ParSeqLike
  48. abstract class Elements extends SeqSplitter[T] with scala.BufferedIterator[T]

    Used to iterate elements using indices

    Used to iterate elements using indices

    Attributes
    protected
    Definition Classes
    ParSeqLike
  49. class IndexWhere extends Accessor[Int, IndexWhere]
    Attributes
    protected[this]
    Definition Classes
    ParSeqLike
  50. class LastIndexWhere extends Accessor[Int, LastIndexWhere]
    Attributes
    protected[this]
    Definition Classes
    ParSeqLike
  51. class Reverse [U >: T, This >: Repr] extends Transformer[Combiner[U, This], Reverse[U, This]]
    Attributes
    protected[this]
    Definition Classes
    ParSeqLike
  52. class ReverseMap [S, That] extends Transformer[Combiner[S, That], ReverseMap[S, That]]
    Attributes
    protected[this]
    Definition Classes
    ParSeqLike
  53. class SameElements [U >: T] extends Accessor[Boolean, SameElements[U]]
    Attributes
    protected[this]
    Definition Classes
    ParSeqLike
  54. class SegmentLength extends Accessor[(Int, Boolean), SegmentLength]
    Attributes
    protected[this]
    Definition Classes
    ParSeqLike
  55. trait Transformer [R, Tp] extends Accessor[R, Tp] with ParSeqLike.Transformer[R, Tp]
    Attributes
    protected
    Definition Classes
    ParSeqLike
  56. class Updated [U >: T, That] extends Transformer[Combiner[U, That], Updated[U, That]]
    Attributes
    protected[this]
    Definition Classes
    ParSeqLike
  57. class Zip [U >: T, S, That] extends Transformer[Combiner[(U, S), That], Zip[U, S, That]]
    Attributes
    protected[this]
    Definition Classes
    ParSeqLike
  58. class ParVectorIterator extends VectorIterator[T] with SeqSplitter[T]
  59. type SSCTask[R, Tp] = StrictSplitterCheckTask[R, Tp]
    Definition Classes
    ParIterableLike
  60. type SuperParIterator = IterableSplitter[T]
    Attributes
    protected[this]
    Definition Classes
    ParSeqLike

Value Members

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

    Test two objects for inequality.

    Test two objects for inequality.

    returns

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

    Definition Classes
    AnyRef → Any
  2. 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
  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from ParVector[T] to any2stringadd[ParVector[T]] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ++[U >: T, That](that: GenTraversableOnce[U])(implicit bf: CanBuildFrom[ParVector[T], U, That]): That

    Returns a new parallel iterable containing the elements from the left hand operand followed by the elements from the right hand operand.

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

    That

    the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.

    that

    the traversable to append.

    bf

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

    returns

    a new collection of type That which contains all elements of this parallel iterable followed by all elements of that.

    Definition Classes
    ParIterableLikeGenTraversableLike
  5. def +:(elem: A): ParVector[A]

    [use case] A copy of the immutable parallel vector with an element prepended.

    [use case]

    A copy of the immutable parallel vector with an element prepended.

    Note that :-ending operators are right associative (see example). A mnemonic for +: vs. :+ is: the COLon goes on the COLlection side.

    Also, the original immutable parallel vector is not modified, so you will want to capture the result.

    Example:

    scala> val x = List(1)
    x: List[Int] = List(1)
    
    scala> val y = 2 +: x
    y: List[Int] = List(2, 1)
    
    scala> println(x)
    List(1)
    elem

    the prepended element

    returns

    a new immutable parallel vector consisting of elem followed by all elements of this immutable parallel vector.

    Definition Classes
    ParSeqLikeGenSeqLike
    Full Signature

    def +:[U >: T, That](elem: U)(implicit bf: CanBuildFrom[ParVector[T], U, That]): That

  6. def ->[B](y: B): (ParVector[T], B)
    Implicit
    This member is added by an implicit conversion from ParVector[T] to ArrowAssoc[ParVector[T]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  7. def /:[S](z: S)(op: (S, T) ⇒ S): S

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

    Applies a binary operator to a start value and all elements of this parallel iterable, 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 = List(1,2,3,4)
    a: List[Int] = List(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 parallel iterable, 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 parallel iterable.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  8. def :+(elem: A): ParVector[A]

    [use case] A copy of this immutable parallel vector with an element appended.

    [use case]

    A copy of this immutable parallel vector with an element appended.

    A mnemonic for +: vs. :+ is: the COLon goes on the COLlection side.

    Note: will not terminate for infinite-sized collections.

    Example:

    scala> val a = List(1)
    a: List[Int] = List(1)
    
    scala> val b = a :+ 2
    b: List[Int] = List(1, 2)
    
    scala> println(a)
    List(1)
    elem

    the appended element

    returns

    a new immutable parallel vector consisting of all elements of this immutable parallel vector followed by elem.

    Definition Classes
    ParSeqLikeGenSeqLike
    Full Signature

    def :+[U >: T, That](elem: U)(implicit bf: CanBuildFrom[ParVector[T], U, That]): That

  9. def :\[S](z: S)(op: (T, S) ⇒ S): S

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

    Applies a binary operator to all elements of this parallel iterable 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 = List(1,2,3,4)
    a: List[Int] = List(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 parallel iterable, 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 parallel iterable.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  10. final def ==(arg0: Any): Boolean

    The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

    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
    AnyRef → Any
  11. def aggregate[S](z: ⇒ S)(seqop: (S, T) ⇒ 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 set, while combop would concatenate two sets 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) and may be evaluated more than once

    seqop

    an operator used to accumulate results within a partition

    combop

    an associative operator used to combine results from different partitions

    Definition Classes
    ParIterableLikeGenTraversableOnce
  12. def apply(idx: Int): T

    Selects an element by its index in the immutable parallel vector.

    Selects an element by its index in the immutable parallel vector.

    Example:

    scala> val x = List(1, 2, 3, 4, 5)
    x: List[Int] = List(1, 2, 3, 4, 5)
    
    scala> x(3)
    res1: Int = 4
    idx

    The index to select.

    returns

    the element of this immutable parallel vector at index idx, where 0 indicates the first element.

    Definition Classes
    ParVectorParSeqGenSeqLike
    Exceptions thrown

    IndexOutOfBoundsException if idx does not satisfy 0 <= idx < length.

  13. 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.

  14. def bf2seq[S, That](bf: CanBuildFrom[ParVector[T], S, That]): CanBuildFrom[immutable.Vector[T], S, That]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  15. implicit def builder2ops[Elem, To](cb: Builder[Elem, To]): BuilderOps[Elem, To]
    Attributes
    protected
    Definition Classes
    ParIterableLike
  16. def canEqual(other: Any): Boolean
    Definition Classes
    ParIterableLike
  17. 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[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
    Note

    not specified by SLS as a member of AnyRef

  18. def collect[B](pf: PartialFunction[A, B]): ParVector[B]

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

    [use case]

    Builds a new collection by applying a partial function to all elements of this immutable parallel vector on which the function is defined.

    B

    the element type of the returned collection.

    pf

    the partial function which filters and maps the immutable parallel vector.

    returns

    a new immutable parallel vector 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[T, S])(implicit bf: CanBuildFrom[ParVector[T], S, That]): That

  19. def combinerFactory[S, That](cbf: () ⇒ Combiner[S, That]): CombinerFactory[S, That]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  20. def combinerFactory: CombinerFactory[T, ParVector[T]]

    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
  21. def companion: ParVector.type

    The factory companion object that builds instances of class immutable.ParVector.

    The factory companion object that builds instances of class immutable.ParVector. (or its Iterable superclass where class immutable.ParVector is not a Seq.)

    Definition Classes
    ParVectorParSeqParIterableParSeqParIterableGenericParTemplateGenSeqGenIterableGenTraversableGenericTraversableTemplate
  22. def copyToArray(xs: Array[A], start: Int, len: Int): Unit

    [use case] Copies the elements of this immutable parallel vector to an array.

    [use case]

    Copies the elements of this immutable parallel vector to an array. Fills the given array xs with at most len elements of this immutable parallel vector, starting at position start. Copying will stop once either the end of the current immutable parallel vector is reached, or the end of the target array is reached, or len elements have been copied.

    Note: will not terminate for infinite-sized collections.

    xs

    the array to fill.

    start

    the starting index.

    len

    the maximal number of elements to copy.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def copyToArray[U >: T](xs: Array[U], start: Int, len: Int): Unit

  23. def copyToArray(xs: Array[A], start: Int): Unit

    [use case] Copies the elements of this immutable parallel vector to an array.

    [use case]

    Copies the elements of this immutable parallel vector to an array. Fills the given array xs with values of this immutable parallel vector, beginning at index start. Copying will stop once either the end of the current immutable parallel vector is reached, or the end of the target 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 >: T](xs: Array[U], start: Int): Unit

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

    [use case] Copies the elements of this immutable parallel vector to an array.

    [use case]

    Copies the elements of this immutable parallel vector to an array. Fills the given array xs with values of this immutable parallel vector. Copying will stop once either the end of the current immutable parallel vector is reached, or the end of the target array is reached.

    Note: will not terminate for infinite-sized collections.

    xs

    the array to fill.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def copyToArray[U >: T](xs: Array[U]): Unit

  25. def corresponds[S](that: GenSeq[S])(p: (T, S) ⇒ Boolean): Boolean

    Tests whether every element of this parallel iterable relates to the corresponding element of another parallel sequence by satisfying a test predicate.

    Tests whether every element of this parallel iterable relates to the corresponding element of another parallel sequence by satisfying a test predicate.

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

    S

    the type of the elements of that

    that

    the other parallel sequence

    p

    the test predicate, which relates elements from both sequences

    returns

    true if both parallel sequences have the same length and p(x, y) is true for all corresponding elements x of this parallel iterable and y of that, otherwise false

    Definition Classes
    ParSeqLikeGenSeqLike
  26. def count(p: (T) ⇒ Boolean): Int

    Counts the number of elements in the parallel iterable which satisfy a predicate.

    Counts the number of elements in the parallel iterable 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. implicit def delegatedSignalling2ops[PI <: DelegatedSignalling](it: PI): SignallingOps[PI]
    Attributes
    protected
    Definition Classes
    ParIterableLike
  29. def diff(that: GenSeq[A]): ParVector[A]

    [use case] Computes the multiset difference between this immutable parallel vector and another sequence.

    [use case]

    Computes the multiset difference between this immutable parallel vector and another sequence.

    Note: will not terminate for infinite-sized collections.

    that

    the sequence of elements to remove

    returns

    a new immutable parallel vector which contains all elements of this immutable parallel vector except some of occurrences of elements that also appear in that. If an element value x appears n times in that, then the first n occurrences of x will not form part of the result, but any following occurrences will.

    Definition Classes
    ParSeqLikeGenSeqLike
    Full Signature

    def diff[U >: T](that: GenSeq[U]): ParVector[T]

  30. def distinct: ParVector[T]

    Builds a new parallel iterable from this parallel iterable without any duplicate elements.

    Builds a new parallel iterable from this parallel iterable without any duplicate elements.

    Note: will not terminate for infinite-sized collections.

    returns

    A new parallel iterable which contains the first occurrence of every element of this parallel iterable.

    Definition Classes
    ParSeqLikeGenSeqLike
  31. def down(p: IterableSplitter[_]): SeqSplitter[T]
    Attributes
    protected[this]
    Definition Classes
    ParSeqLike
  32. def drop(n: Int): ParVector[T]

    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 parallel iterable.

    returns

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

    Definition Classes
    ParIterableLikeGenTraversableLike
  33. def dropWhile(pred: (T) ⇒ Boolean): ParVector[T]

    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 parallel iterable that satisfy the predicate pred

    Definition Classes
    ParIterableLikeGenTraversableLike
  34. def endsWith[S](that: GenSeq[S]): Boolean

    Tests whether this parallel iterable ends with the given parallel sequence.

    Tests whether this parallel iterable ends with the given parallel sequence.

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

    S

    the type of the elements of that sequence

    that

    the sequence to test

    returns

    true if this parallel iterable has that as a suffix, false otherwise

    Definition Classes
    ParSeqLikeGenSeqLike
  35. def ensuring(cond: (ParVector[T]) ⇒ Boolean, msg: ⇒ Any): ParVector[T]
    Implicit
    This member is added by an implicit conversion from ParVector[T] to Ensuring[ParVector[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  36. def ensuring(cond: (ParVector[T]) ⇒ Boolean): ParVector[T]
    Implicit
    This member is added by an implicit conversion from ParVector[T] to Ensuring[ParVector[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  37. def ensuring(cond: Boolean, msg: ⇒ Any): ParVector[T]
    Implicit
    This member is added by an implicit conversion from ParVector[T] to Ensuring[ParVector[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  38. def ensuring(cond: Boolean): ParVector[T]
    Implicit
    This member is added by an implicit conversion from ParVector[T] to Ensuring[ParVector[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  39. final def eq(arg0: AnyRef): Boolean

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

    Tests whether the argument (that) 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
  40. def equals(that: Any): Boolean

    The equals method for arbitrary sequences.

    The equals method for arbitrary sequences. Compares this sequence to some other object.

    that

    The object to compare the sequence to

    returns

    true if that is a sequence that has the same elements as this sequence in the same order, false otherwise

    Definition Classes
    GenSeqLikeEqualsAny
  41. def exists(p: (T) ⇒ Boolean): Boolean

    Tests whether a predicate holds for some element of this parallel iterable.

    Tests whether a predicate holds for some element of this parallel iterable.

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

    p

    a predicate used to test elements

    returns

    true if p holds for some element, false otherwise

    Definition Classes
    ParIterableLikeGenTraversableOnce
  42. def filter(pred: (T) ⇒ Boolean): ParVector[T]

    Selects all elements of this parallel iterable which satisfy a predicate.

    Selects all elements of this parallel iterable which satisfy a predicate.

    pred

    the predicate used to test elements.

    returns

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

    Definition Classes
    ParIterableLikeGenTraversableLike
  43. def filterNot(pred: (T) ⇒ Boolean): ParVector[T]

    Selects all elements of this parallel iterable which do not satisfy a predicate.

    Selects all elements of this parallel iterable which do not satisfy a predicate.

    pred

    the predicate used to test elements.

    returns

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

    Definition Classes
    ParIterableLikeGenTraversableLike
  44. 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[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
    Note

    not specified by SLS as a member of AnyRef

  45. def find(p: (T) ⇒ Boolean): Option[T]

    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.

    p

    predicate used to test the elements

    returns

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

    Definition Classes
    ParIterableLikeGenTraversableOnce
  46. def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): ParVector[B]

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

    [use case]

    Builds a new collection by applying a function to all elements of this immutable parallel vector 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 immutable parallel vector. 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 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 immutable parallel vector resulting from applying the given collection-valued function f to each element of this immutable parallel vector and concatenating the results.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Full Signature

    def flatMap[S, That](f: (T) ⇒ GenTraversableOnce[S])(implicit bf: CanBuildFrom[ParVector[T], S, That]): That

  47. def flatten[B]: ParVector[B]

    [use case] Converts this immutable parallel vector of traversable collections into a immutable parallel vector formed by the elements of these traversable collections.

    [use case]

    Converts this immutable parallel vector of traversable collections into a immutable parallel vector formed by the elements of these traversable collections.

    The resulting collection's type will be guided by the static type of immutable parallel vector. For example:

    val xs = List(
               Set(1, 2, 3),
               Set(1, 2, 3)
             ).flatten
    // xs == List(1, 2, 3, 1, 2, 3)
    
    val ys = Set(
               List(1, 2, 3),
               List(3, 2, 1)
             ).flatten
    // ys == Set(1, 2, 3)
    B

    the type of the elements of each traversable collection.

    returns

    a new immutable parallel vector resulting from concatenating all element immutable parallel vectors.

    Definition Classes
    GenericTraversableTemplate
    Full Signature

    def flatten[B](implicit asTraversable: (T) ⇒ GenTraversableOnce[B]): ParVector[B]

  48. def fold[U >: T](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
  49. def foldLeft[S](z: S)(op: (S, T) ⇒ S): S

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

    Applies a binary operator to a start value and all elements of this parallel iterable, 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 parallel iterable, 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 parallel iterable. Returns z if this parallel iterable is empty.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  50. def foldRight[S](z: S)(op: (T, S) ⇒ S): S

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

    Applies a binary operator to all elements of this parallel iterable 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 parallel iterable, 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 parallel iterable. Returns z if this parallel iterable is empty.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  51. def forall(p: (T) ⇒ Boolean): Boolean

    Tests whether a predicate holds for all elements of this parallel iterable.

    Tests whether a predicate holds for all elements of this parallel iterable.

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

    p

    a predicate used to test elements

    returns

    true if p holds for all elements, false otherwise

    Definition Classes
    ParIterableLikeGenTraversableOnce
  52. def foreach[U](f: (T) ⇒ U): Unit

    Applies a function f to all the elements of parallel iterable in an undefined order.

    Applies a function f to all the elements of parallel iterable in an undefined 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
  53. 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
    This member is added by an implicit conversion from ParVector[T] to StringFormat[ParVector[T]] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  54. def genericBuilder[B]: Combiner[B, ParVector[B]]

    The generic builder that builds instances of Traversable at arbitrary element types.

    The generic builder that builds instances of Traversable at arbitrary element types.

    Definition Classes
    GenericParTemplateGenericTraversableTemplate
  55. def genericCombiner[B]: Combiner[B, ParVector[B]]
    Definition Classes
    GenericParTemplate
  56. final def getClass(): Class[_]

    Returns the runtime class representation of the object.

    Returns the runtime class representation of the object.

    returns

    a class object corresponding to the runtime type of the receiver.

    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  57. def groupBy[K](f: (T) ⇒ K): ParMap[K, ParVector[T]]

    Partitions this parallel iterable into a map of parallel iterables according to some discriminator function.

    Partitions this parallel iterable into a map of parallel iterables 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 parallel iterable.

    K

    the type of keys returned by the discriminator function.

    f

    the discriminator function.

    returns

    A map from keys to parallel iterables such that the following invariant holds:

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

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

    Definition Classes
    ParIterableLikeGenTraversableLike
  58. def hasDefiniteSize: Boolean

    Tests whether this parallel iterable is known to have a finite size.

    Tests whether this parallel iterable is known to have a finite size. All strict collections are known to have finite size. For a non-strict collection such as Stream, the predicate returns true if all elements have been computed. It returns false if the stream is not yet evaluated to the end. Non-empty Iterators usually return false even if they were created from a collection with a known finite size.

    Note: many collection methods will not work on collections of infinite sizes. The typical failure mode is an infinite loop. These methods always attempt a traversal without checking first that hasDefiniteSize returns true. However, checking hasDefiniteSize can provide an assurance that size is well-defined and non-termination is not a concern.

    returns

    true if this collection is known to have finite size, false otherwise.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  59. def hashCode(): Int

    Hashcodes for GenSeq produce a value from the hashcodes of all the elements of the general sequence.

    Hashcodes for GenSeq produce a value from the hashcodes of all the elements of the general sequence.

    returns

    the hash code value for this object.

    Definition Classes
    GenSeqLikeAny
  60. def head: T

    Selects the first element of this parallel iterable.

    Selects the first element of this parallel iterable.

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

    returns

    the first element of this parallel iterable.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Exceptions thrown

    NoSuchElementException if the parallel iterable is empty.

  61. def headOption: Option[T]

    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 parallel iterable if it is nonempty, None if it is empty.

    Definition Classes
    ParIterableLikeGenTraversableLike
  62. def indexOf(elem: T, from: Int): Int

    [use case] Finds index of first occurrence of some value in this immutable parallel vector after or at some start index.

    [use case]

    Finds index of first occurrence of some value in this immutable parallel vector after or at some start index.

    Note: may not terminate for infinite-sized collections.

    elem

    the element value to search for.

    from

    the start index

    returns

    the index >= from of the first element of this immutable parallel vector that is equal (as determined by ==) to elem, or -1, if none exists.

    Definition Classes
    GenSeqLike
    Full Signature

    def indexOf[B >: T](elem: B, from: Int): Int

  63. def indexOf(elem: T): Int

    [use case] Finds index of first occurrence of some value in this immutable parallel vector.

    [use case]

    Finds index of first occurrence of some value in this immutable parallel vector.

    Note: may not terminate for infinite-sized collections.

    elem

    the element value to search for.

    returns

    the index of the first element of this immutable parallel vector that is equal (as determined by ==) to elem, or -1, if none exists.

    Definition Classes
    GenSeqLike
    Full Signature

    def indexOf[B >: T](elem: B): Int

  64. def indexWhere(p: (T) ⇒ Boolean, from: Int): Int

    Finds the first element satisfying some predicate.

    Finds the first element satisfying some 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.

    p

    the predicate used to test the elements

    from

    the starting offset for the search

    returns

    the index >= from of the first element of this parallel iterable that satisfies the predicate p, or -1, if none exists

    Definition Classes
    ParSeqLikeGenSeqLike
  65. def indexWhere(p: (T) ⇒ Boolean): Int

    Finds index of first element satisfying some predicate.

    Finds index of first element satisfying some predicate.

    Note: may not terminate for infinite-sized collections.

    p

    the predicate used to test elements.

    returns

    the index of the first element of this general sequence that satisfies the predicate p, or -1, if none exists.

    Definition Classes
    GenSeqLike
  66. def init: ParVector[T]

    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 parallel iterable consisting of all elements of this parallel iterable except the last one.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Exceptions thrown

    UnsupportedOperationException if the parallel iterable is empty.

  67. def initTaskSupport(): Unit
    Attributes
    protected
    Definition Classes
    ParIterableLike
  68. def intersect(that: scala.Seq[T]): ParVector[T]

    [use case] Computes the multiset intersection between this immutable parallel vector and another sequence.

    [use case]

    Computes the multiset intersection between this immutable parallel vector and another sequence.

    Note: may not terminate for infinite-sized collections.

    that

    the sequence of elements to intersect with.

    returns

    a new immutable parallel vector which contains all elements of this immutable parallel vector which also appear in that. If an element value x appears n times in that, then the first n occurrences of x will be retained in the result, but any following occurrences will be omitted.

    Definition Classes
    ParSeqLikeGenSeqLike
    Full Signature

    def intersect[U >: T](that: GenSeq[U]): ParVector[T]

  69. def isDefinedAt(idx: Int): Boolean

    Tests whether this general sequence contains given index.

    Tests whether this general sequence contains given index.

    The implementations of methods apply and isDefinedAt turn a Seq[A] into a PartialFunction[Int, A].

    idx

    the index to test

    returns

    true if this general sequence contains an element at position idx, false otherwise.

    Definition Classes
    GenSeqLike
  70. def isEmpty: Boolean

    Tests whether the parallel iterable is empty.

    Tests whether the parallel iterable is empty.

    Note: Implementations in subclasses that are not repeatedly traversable must take care not to consume any elements when isEmpty is called.

    returns

    true if the parallel iterable contains no elements, false otherwise.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  71. 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
  72. 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
  73. final def isTraversableAgain: Boolean

    Tests whether this parallel iterable can be repeatedly traversed.

    Tests whether this parallel iterable can be repeatedly traversed.

    returns

    true

    Definition Classes
    ParIterableLikeGenTraversableLikeGenTraversableOnce
  74. def iterator: PreciseSplitter[T]

    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
    ParSeqLikeParIterableLikeGenIterableLike
  75. def last: T

    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 parallel iterable.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Exceptions thrown

    NoSuchElementException If the parallel iterable is empty.

  76. def lastIndexOf(elem: T, end: Int): Int

    [use case] Finds index of last occurrence of some value in this immutable parallel vector before or at a given end index.

    [use case]

    Finds index of last occurrence of some value in this immutable parallel vector before or at a given end index.

    elem

    the element value to search for.

    end

    the end index.

    returns

    the index <= end of the last element of this immutable parallel vector that is equal (as determined by ==) to elem, or -1, if none exists.

    Definition Classes
    GenSeqLike
    Full Signature

    def lastIndexOf[B >: T](elem: B, end: Int): Int

  77. def lastIndexOf(elem: T): Int

    [use case] Finds index of last occurrence of some value in this immutable parallel vector.

    [use case]

    Finds index of last occurrence of some value in this immutable parallel vector.

    Note: will not terminate for infinite-sized collections.

    elem

    the element value to search for.

    returns

    the index of the last element of this immutable parallel vector that is equal (as determined by ==) to elem, or -1, if none exists.

    Definition Classes
    GenSeqLike
    Full Signature

    def lastIndexOf[B >: T](elem: B): Int

  78. def lastIndexWhere(p: (T) ⇒ Boolean, end: Int): Int

    Finds the last element satisfying some predicate.

    Finds the last element satisfying some 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 minimum integer value.

    p

    the predicate used to test the elements

    end

    the maximum offset for the search

    returns

    the index <= end of the first element of this parallel iterable that satisfies the predicate p, or -1, if none exists

    Definition Classes
    ParSeqLikeGenSeqLike
  79. def lastIndexWhere(p: (T) ⇒ Boolean): Int

    Finds index of last element satisfying some predicate.

    Finds index of last element satisfying some predicate.

    Note: will not terminate for infinite-sized collections.

    p

    the predicate used to test elements.

    returns

    the index of the last element of this general sequence that satisfies the predicate p, or -1, if none exists.

    Definition Classes
    GenSeqLike
  80. def lastOption: Option[T]

    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 parallel iterable$ if it is nonempty, None if it is empty.

    Definition Classes
    ParIterableLikeGenTraversableLike
  81. def length: Int

    The length of the immutable parallel vector.

    The length of the immutable parallel vector.

    Note: will not terminate for infinite-sized collections.

    Note: xs.length and xs.size yield the same result.

    returns

    the number of elements in this immutable parallel vector.

    Definition Classes
    ParVectorGenSeqLike
    Exceptions thrown

    IllegalArgumentException if the length of the sequence cannot be represented in an Int, for example, (-1 to Int.MaxValue).length.

  82. def map[B](f: (A) ⇒ B): ParVector[B]

    [use case] Builds a new collection by applying a function to all elements of this immutable parallel vector.

    [use case]

    Builds a new collection by applying a function to all elements of this immutable parallel vector.

    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

    a new immutable parallel vector resulting from applying the given function f to each element of this immutable parallel vector and collecting the results.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Full Signature

    def map[S, That](f: (T) ⇒ S)(implicit bf: CanBuildFrom[ParVector[T], S, That]): That

  83. def max: A

    [use case] Finds the largest element.

    [use case]

    Finds the largest element.

    returns

    the largest element of this immutable parallel vector.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def max[U >: T](implicit ord: Ordering[U]): T

  84. def maxBy[B](f: (A) ⇒ B): A

    [use case] Finds the first element which yields the largest value measured by function f.

    [use case]

    Finds the first element which yields the largest value measured by function f.

    B

    The result type of the function f.

    f

    The measuring function.

    returns

    the first element of this immutable parallel vector with the largest value measured by function f.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def maxBy[S](f: (T) ⇒ S)(implicit cmp: Ordering[S]): T

  85. def min: A

    [use case] Finds the smallest element.

    [use case]

    Finds the smallest element.

    returns

    the smallest element of this immutable parallel vector

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def min[U >: T](implicit ord: Ordering[U]): T

  86. def minBy[B](f: (A) ⇒ B): A

    [use case] Finds the first element which yields the smallest value measured by function f.

    [use case]

    Finds the first element which yields the smallest value measured by function f.

    B

    The result type of the function f.

    f

    The measuring function.

    returns

    the first element of this immutable parallel vector with the smallest value measured by function f.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def minBy[S](f: (T) ⇒ S)(implicit cmp: Ordering[S]): T

  87. def mkString: String

    Displays all elements of this parallel iterable in a string.

    Displays all elements of this parallel iterable in a string.

    returns

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

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

    Displays all elements of this parallel iterable in a string using a separator string.

    Displays all elements of this parallel iterable in a string using a separator string.

    sep

    the separator string.

    returns

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

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

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

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

    Displays all elements of this parallel iterable 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 parallel iterable. 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 parallel iterable are separated by the string sep.

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

  90. 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
  91. def newBuilder: Builder[T, ParVector[T]]

    The builder that builds instances of type Traversable[A]

    The builder that builds instances of type Traversable[A]

    Attributes
    protected[this]
    Definition Classes
    GenericParTemplateGenericTraversableTemplateHasNewBuilder
  92. def newCombiner: Combiner[T, ParVector[T]]
    Attributes
    protected[this]
    Definition Classes
    GenericParTemplateHasNewCombiner
  93. def nonEmpty: Boolean

    Tests whether the parallel iterable is not empty.

    Tests whether the parallel iterable is not empty.

    returns

    true if the parallel iterable contains at least one element, false otherwise.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  94. 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
    Annotations
    @native()
    Note

    not specified by SLS as a member of AnyRef

  95. 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
    Annotations
    @native()
    Note

    not specified by SLS as a member of AnyRef

  96. def padTo(len: Int, elem: A): ParVector[A]

    [use case] A copy of this immutable parallel vector with an element value appended until a given target length is reached.

    [use case]

    A copy of this immutable parallel vector with an element value appended until a given target length is reached.

    len

    the target length

    elem

    the padding value

    returns

    a new immutable parallel vector consisting of all elements of this immutable parallel vector followed by the minimal number of occurrences of elem so that the resulting immutable parallel vector has a length of at least len.

    Definition Classes
    ParSeqLikeGenSeqLike
    Full Signature

    def padTo[U >: T, That](len: Int, elem: U)(implicit bf: CanBuildFrom[ParVector[T], U, That]): That

  97. def par: ParVector[T]

    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
  98. def parCombiner: Combiner[T, ParVector[T]]

    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
  99. def partition(pred: (T) ⇒ Boolean): (ParVector[T], ParVector[T])

    Partitions this parallel iterable in two parallel iterables according to a predicate.

    Partitions this parallel iterable in two parallel iterables according to a predicate.

    pred

    the predicate on which to partition.

    returns

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

    Definition Classes
    ParIterableLikeGenTraversableLike
  100. def patch(from: Int, that: GenSeq[A], replaced: Int): ParVector[A]

    [use case] Produces a new immutable parallel vector where a slice of elements in this immutable parallel vector is replaced by another sequence.

    [use case]

    Produces a new immutable parallel vector where a slice of elements in this immutable parallel vector is replaced by another sequence.

    from

    the index of the first replaced element

    replaced

    the number of elements to drop in the original immutable parallel vector

    returns

    a new immutable parallel vector consisting of all elements of this immutable parallel vector except that replaced elements starting from from are replaced by patch.

    Definition Classes
    ParSeqLikeGenSeqLike
    Full Signature

    def patch[U >: T, That](from: Int, patch: GenSeq[U], replaced: Int)(implicit bf: CanBuildFrom[ParVector[T], U, That]): That

  101. def prefixLength(p: (T) ⇒ Boolean): Int

    Returns the length of the longest prefix whose elements all satisfy some predicate.

    Returns the length of the longest prefix whose elements all satisfy some predicate.

    Note: may not terminate for infinite-sized collections.

    p

    the predicate used to test elements.

    returns

    the length of the longest prefix of this general sequence such that every element of the segment satisfies the predicate p.

    Definition Classes
    GenSeqLike
  102. 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 immutable parallel vector 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 immutable parallel vector and as result type of product. Examples of such types are: Long, Float, Double, BigInt.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def product[U >: T](implicit num: Numeric[U]): U

  103. def reduce[U >: T](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 parallel iterable is empty.

  104. def reduceLeft[U >: T](op: (U, T) ⇒ U): U
    Definition Classes
    ParIterableLike
  105. def reduceLeftOption[U >: T](op: (U, T) ⇒ U): Option[U]

    Optionally applies a binary operator to all elements of this parallel iterable, going left to right.

    Optionally applies a binary operator to all elements of this parallel iterable, 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) if this parallel iterable is nonempty, None otherwise.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  106. def reduceOption[U >: T](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
  107. def reduceRight[U >: T](op: (T, U) ⇒ U): U

    Applies a binary operator to all elements of this parallel iterable, going right to left.

    Applies a binary operator to all elements of this parallel iterable, 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 parallel iterable, going right to left:

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

    where x1, ..., xn are the elements of this parallel iterable.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Exceptions thrown

    UnsupportedOperationException if this parallel iterable is empty.

  108. def reduceRightOption[U >: T](op: (T, U) ⇒ U): Option[U]

    Optionally applies a binary operator to all elements of this parallel iterable, going right to left.

    Optionally applies a binary operator to all elements of this parallel iterable, 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) if this parallel iterable is nonempty, None otherwise.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  109. def repr: ParVector[T]
    Definition Classes
    ParIterableLikeGenTraversableLike
  110. 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
  111. def reverse: ParVector[T]

    Returns new parallel iterable with elements in reversed order.

    Returns new parallel iterable with elements in reversed order.

    Note: will not terminate for infinite-sized collections.

    returns

    A new parallel iterable with all elements of this parallel iterable in reversed order.

    Definition Classes
    ParSeqLikeGenSeqLike
  112. def reverseMap[B](f: (A) ⇒ B): ParVector[B]

    [use case] Builds a new collection by applying a function to all elements of this immutable parallel vector and collecting the results in reversed order.

    [use case]

    Builds a new collection by applying a function to all elements of this immutable parallel vector and collecting the results in reversed order.

    Note: will not terminate for infinite-sized collections.

    Note: xs.reverseMap(f) is the same as xs.reverse.map(f) but might be more efficient.

    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

    a new immutable parallel vector resulting from applying the given function f to each element of this immutable parallel vector and collecting the results in reversed order.

    Definition Classes
    ParSeqLikeGenSeqLike
    Full Signature

    def reverseMap[S, That](f: (T) ⇒ S)(implicit bf: CanBuildFrom[ParVector[T], S, That]): That

  113. def sameElements(that: GenIterable[A]): Boolean

    [use case] Checks if the other iterable collection contains the same elements in the same order as this immutable parallel vector.

    [use case]

    Checks if the other iterable collection contains the same elements in the same order as this immutable parallel vector.

    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
    ParSeqLikeParIterableLikeGenIterableLike
    Full Signature

    def sameElements[U >: T](that: GenIterable[U]): Boolean

  114. def scan(z: T)(op: (T, T) ⇒ T): ParVector[T]

    [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 immutable parallel vector containing the prefix scan of the elements in this immutable parallel vector

    Definition Classes
    ParIterableLikeGenTraversableLike
    Full Signature

    def scan[U >: T, That](z: U)(op: (U, U) ⇒ U)(implicit bf: CanBuildFrom[ParVector[T], U, That]): That

  115. def scanBlockSize: Int
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  116. def scanLeft[S, That](z: S)(op: (S, T) ⇒ S)(implicit bf: CanBuildFrom[ParVector[T], 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 the new element type B.

    returns

    collection with intermediate results

    Definition Classes
    ParIterableLikeGenTraversableLike
  117. def scanRight[S, That](z: S)(op: (T, S) ⇒ S)(implicit bf: CanBuildFrom[ParVector[T], 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 the new element type B.

    returns

    collection with intermediate results

    Definition Classes
    ParIterableLikeGenTraversableLike
  118. def segmentLength(p: (T) ⇒ Boolean, from: Int): Int

    Returns the length of the longest segment of elements starting at a given position satisfying some predicate.

    Returns the length of the longest segment of elements starting at a given position satisfying some 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.

    p

    the predicate used to test the elements

    from

    the starting offset for the search

    returns

    the length of the longest segment of elements starting at from and satisfying the predicate

    Definition Classes
    ParSeqLikeGenSeqLike
  119. def seq: immutable.Vector[T]
  120. def sequentially[S, That <: Parallel](b: (immutable.Vector[T]) ⇒ Parallelizable[S, That]): ParVector[T]
    Attributes
    protected[this]
    Definition Classes
    ParIterableLike
  121. def size: Int

    The size of this parallel iterable.

    The size of this parallel iterable.

    Note: will not terminate for infinite-sized collections.

    returns

    the number of elements in this parallel iterable.

    Definition Classes
    ParSeqLikeGenTraversableLikeGenTraversableOnce
  122. def sizeHintIfCheap: Int

    The size of this collection or iterator, if it can be cheaply computed

    The size of this collection or iterator, if it can be cheaply computed

    returns

    the number of elements in this collection or iterator, or -1 if the size cannot be determined cheaply

    Attributes
    protected[scala.collection]
    Definition Classes
    GenTraversableOnce
  123. def slice(unc_from: Int, unc_until: Int): ParVector[T]

    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 parallel iterable.

    unc_until

    the lowest index to EXCLUDE from this parallel iterable.

    returns

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

    Definition Classes
    ParIterableLikeGenTraversableLike
  124. def span(pred: (T) ⇒ Boolean): (ParVector[T], ParVector[T])

    Splits this parallel iterable into a prefix/suffix pair according to a predicate.

    Splits this parallel iterable 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
  125. def splitAt(n: Int): (ParVector[T], ParVector[T])

    Splits this parallel iterable into two at a given position.

    Splits this parallel iterable 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 parallel iterables consisting of the first n elements of this parallel iterable, and the other elements.

    Definition Classes
    ParIterableLikeGenTraversableLike
  126. def splitter: SeqSplitter[T]

    A more refined version of the iterator found in the ParallelIterable trait, this iterator can be split into arbitrary subsets of iterators.

    A more refined version of the iterator found in the ParallelIterable trait, this iterator can be split into arbitrary subsets of iterators.

    returns

    an iterator that can be split into subsets of precise size

    Definition Classes
    ParVectorParSeqLikeParIterableLike
  127. def startsWith[S](that: GenSeq[S], offset: Int): Boolean

    Tests whether this parallel iterable contains the given sequence at a given index.

    Tests whether this parallel iterable contains the given sequence at a given index.

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

    S

    the element type of that parallel sequence

    that

    the parallel sequence this sequence is being searched for

    offset

    the starting offset for the search

    returns

    true if there is a sequence that starting at offset in this sequence, false otherwise

    Definition Classes
    ParSeqLikeGenSeqLike
  128. def startsWith[B](that: GenSeq[B]): Boolean

    Tests whether this general sequence starts with the given sequence.

    Tests whether this general sequence starts with the given sequence.

    that

    the sequence to test

    returns

    true if this collection has that as a prefix, false otherwise.

    Definition Classes
    GenSeqLike
  129. 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 parallel iterable. By default the string prefix is the simple name of the collection class parallel iterable.

    Definition Classes
    ParSeqParIterableGenTraversableLike
  130. 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 immutable parallel vector 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 immutable parallel vector and as result type of sum. Examples of such types are: Long, Float, Double, BigInt.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def sum[U >: T](implicit num: Numeric[U]): U

  131. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  132. def tail: ParVector[T]

    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 parallel iterable consisting of all elements of this parallel iterable except the first one.

    Definition Classes
    ParIterableLikeGenTraversableLike
    Exceptions thrown

    UnsupportedOperationException if the parallel iterable is empty.

  133. def take(n: Int): ParVector[T]

    Selects first n elements.

    Selects first n elements.

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

    n

    the number of elements to take from this parallel iterable.

    returns

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

    Definition Classes
    ParIterableLikeGenTraversableLike
  134. def takeWhile(pred: (T) ⇒ Boolean): ParVector[T]

    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 parallel iterable of elements that satisfy the predicate pred

    Definition Classes
    ParIterableLikeGenTraversableLike
  135. implicit def task2ops[R, Tp](tsk: SSCTask[R, Tp]): TaskOps[R, Tp]
    Attributes
    protected
    Definition Classes
    ParIterableLike
  136. def tasksupport: TaskSupport

    The task support object which is responsible for scheduling and load-balancing tasks to processors.

    The task support object which is responsible for scheduling and load-balancing tasks to processors.

    Definition Classes
    ParIterableLike
    See also

    scala.collection.parallel.TaskSupport

  137. def tasksupport_=(ts: TaskSupport): Unit

    Changes the task support object which is responsible for scheduling and load-balancing tasks to processors.

    Changes the task support object which is responsible for scheduling and load-balancing tasks to processors.

    A task support object can be changed in a parallel collection after it has been created, but only during a quiescent period, i.e. while there are no concurrent invocations to parallel collection methods.

    Here is a way to change the task support of a parallel collection:

    import scala.collection.parallel._
    val pc = mutable.ParArray(1, 2, 3)
    pc.tasksupport = new ForkJoinTaskSupport(
      new java.util.concurrent.ForkJoinPool(2))
    Definition Classes
    ParIterableLike
    See also

    scala.collection.parallel.TaskSupport

  138. def to[Col[_]]: Col[A]

    [use case] Converts this immutable parallel vector into another by copying all elements.

    [use case]

    Converts this immutable parallel vector 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 immutable parallel vector.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

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

  139. def toArray: Array[A]

    [use case] Converts this immutable parallel vector to an array.

    [use case]

    Converts this immutable parallel vector to an array.

    Note: will not terminate for infinite-sized collections.

    returns

    an array containing all elements of this immutable parallel vector. An ClassTag must be available for the element type of this immutable parallel vector.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

    def toArray[U >: T](implicit arg0: ClassTag[U]): Array[U]

  140. def toBuffer[U >: T]: Buffer[U]

    Uses the contents of this parallel iterable to create a new mutable buffer.

    Uses the contents of this parallel iterable to create a new mutable buffer.

    Note: will not terminate for infinite-sized collections.

    returns

    a buffer containing all elements of this parallel iterable.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  141. def toIndexedSeq: immutable.IndexedSeq[T]

    Converts this parallel iterable to an indexed sequence.

    Converts this parallel iterable to an indexed sequence.

    Note: will not terminate for infinite-sized collections.

    returns

    an indexed sequence containing all elements of this parallel iterable.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  142. def toIterable: ParIterable[T]

    Converts this parallel iterable to an iterable collection.

    Converts this parallel iterable 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 parallel iterable.

    Definition Classes
    ParIterableParIterableLikeGenTraversableOnce
  143. def toIterator: scala.Iterator[T]

    Returns an Iterator over the elements in this parallel iterable.

    Returns an Iterator over the elements in this parallel iterable. 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 parallel iterable.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  144. def toList: List[T]

    Converts this parallel iterable to a list.

    Converts this parallel iterable to a list.

    Note: will not terminate for infinite-sized collections.

    returns

    a list containing all elements of this parallel iterable.

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

    [use case] Converts this immutable parallel vector to a map.

    [use case]

    Converts this immutable parallel vector 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 immutable parallel vector.

    Definition Classes
    ParIterableLikeGenTraversableOnce
    Full Signature

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

  146. def toParArray: ParArray[T]
    Implicit
    This member is added by an implicit conversion from ParVector[T] to CollectionsHaveToParArray[ParVector[T], T] performed by method CollectionsHaveToParArray in scala.collection.parallel. This conversion will take place only if an implicit value of type (ParVector[T]) ⇒ GenTraversableOnce[T] is in scope.
    Definition Classes
    CollectionsHaveToParArray
  147. def toParCollection[U >: T, That](cbf: () ⇒ Combiner[U, That]): That
    Attributes
    protected
    Definition Classes
    ParIterableLike
  148. def toParMap[K, V, That](cbf: () ⇒ Combiner[(K, V), That])(implicit ev: <:<[T, (K, V)]): That
    Attributes
    protected
    Definition Classes
    ParIterableLike
  149. def toSeq: ParSeq[T]

    Converts this mutable parallel sequence to a sequence.

    Converts this mutable parallel sequence 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 mutable parallel sequence.

    Definition Classes
    ParSeqParIterableParSeqLikeParIterableLikeGenSeqLikeGenTraversableOnce
  150. def toSet[U >: T]: ParSet[U]

    Converts this parallel iterable to a set.

    Converts this parallel iterable to a set.

    Note: will not terminate for infinite-sized collections.

    returns

    a set containing all elements of this parallel iterable.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  151. def toStream: Stream[T]

    Converts this parallel iterable to a stream.

    Converts this parallel iterable to a stream.

    returns

    a stream containing all elements of this parallel iterable.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  152. 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
    ParSeqParSeqLikeParIterableLike → AnyRef → Any
  153. def toTraversable: GenTraversable[T]

    Converts this parallel iterable to an unspecified Traversable.

    Converts this parallel iterable 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 parallel iterable.

    Definition Classes
    ParIterableLikeGenTraversableOnce
  154. def toVector: immutable.Vector[T]

    Converts this immutable parallel vector to a Vector.

    Converts this immutable parallel vector to a Vector.

    Note: will not terminate for infinite-sized collections.

    returns

    a vector containing all elements of this immutable parallel vector.

    Definition Classes
    ParVectorParIterableLikeGenTraversableOnce
  155. def transpose[B](implicit asTraversable: (T) ⇒ GenTraversableOnce[B]): ParVector[ParVector[B]]

    Transposes this collection of traversable collections into a collection of collections.

    Transposes this collection of traversable collections into a collection of collections.

    The resulting collection's type will be guided by the static type of collection. For example:

    val xs = List(
               Set(1, 2, 3),
               Set(4, 5, 6)).transpose
    // xs == List(
    //         List(1, 4),
    //         List(2, 5),
    //         List(3, 6))
    
    val ys = Vector(
               List(1, 2, 3),
               List(4, 5, 6)).transpose
    // ys == Vector(
    //         Vector(1, 4),
    //         Vector(2, 5),
    //         Vector(3, 6))
    B

    the type of the elements of each traversable collection.

    asTraversable

    an implicit conversion which asserts that the element type of this collection is a Traversable.

    returns

    a two-dimensional collection of collections which has as nth row the nth column of this collection.

    Definition Classes
    GenericTraversableTemplate
    Annotations
    @migration
    Migration

    (Changed in version 2.9.0) transpose throws an IllegalArgumentException if collections are not uniformly sized.

    Exceptions thrown

    IllegalArgumentException if all collections in this collection are not of the same size.

  156. def union(that: GenSeq[T]): ParVector[T]

    [use case] Produces a new sequence which contains all elements of this immutable parallel vector and also all elements of a given sequence.

    [use case]

    Produces a new sequence which contains all elements of this immutable parallel vector and also all elements of a given sequence. xs union ys is equivalent to xs ++ ys.

    Another way to express this is that xs union ys computes the order-preserving multi-set union of xs and ys. union is hence a counter-part of diff and intersect which also work on multi-sets.

    Note: will not terminate for infinite-sized collections.

    that

    the sequence to add.

    returns

    a new immutable parallel vector which contains all elements of this immutable parallel vector followed by all elements of that.

    Definition Classes
    GenSeqLike
    Full Signature

    def union[B >: T, That](that: GenSeq[B])(implicit bf: CanBuildFrom[ParVector[T], B, That]): That

  157. def unzip[A1, A2](implicit asPair: (T) ⇒ (A1, A2)): (ParVector[A1], ParVector[A2])

    Converts this collection of pairs into two collections of the first and second half of each pair.

    Converts this collection of pairs into two collections of the first and second half of each pair.

    val xs = Traversable(
               (1, "one"),
               (2, "two"),
               (3, "three")).unzip
    // xs == (Traversable(1, 2, 3),
    //        Traversable(one, two, three))
    A1

    the type of the first half of the element pairs

    A2

    the type of the second half of the element pairs

    asPair

    an implicit conversion which asserts that the element type of this collection is a pair.

    returns

    a pair of collections, containing the first, respectively second half of each element pair of this collection.

    Definition Classes
    GenericTraversableTemplate
  158. def unzip3[A1, A2, A3](implicit asTriple: (T) ⇒ (A1, A2, A3)): (ParVector[A1], ParVector[A2], ParVector[A3])

    Converts this collection of triples into three collections of the first, second, and third element of each triple.

    Converts this collection of triples into three collections of the first, second, and third element of each triple.

    val xs = Traversable(
               (1, "one", '1'),
               (2, "two", '2'),
               (3, "three", '3')).unzip3
    // xs == (Traversable(1, 2, 3),
    //        Traversable(one, two, three),
    //        Traversable(1, 2, 3))
    A1

    the type of the first member of the element triples

    A2

    the type of the second member of the element triples

    A3

    the type of the third member of the element triples

    asTriple

    an implicit conversion which asserts that the element type of this collection is a triple.

    returns

    a triple of collections, containing the first, second, respectively third member of each element triple of this collection.

    Definition Classes
    GenericTraversableTemplate
  159. def updated(index: Int, elem: A): ParVector[A]

    [use case] A copy of this immutable parallel vector with one single replaced element.

    [use case]

    A copy of this immutable parallel vector with one single replaced element.

    index

    the position of the replacement

    elem

    the replacing element

    returns

    a copy of this immutable parallel vector with the element at position index replaced by elem.

    Definition Classes
    ParSeqLikeGenSeqLike
    Full Signature

    def updated[U >: T, That](index: Int, elem: U)(implicit bf: CanBuildFrom[ParVector[T], U, That]): That

  160. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  161. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  162. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @throws( ... )
  163. def withFilter(pred: (T) ⇒ Boolean): ParVector[T]
    Definition Classes
    ParIterableLike
  164. def wrap[R](body: ⇒ R): NonDivisible[R]
    Attributes
    protected
    Definition Classes
    ParIterableLike
  165. def zip[B](that: GenIterable[B]): ParVector[(A, B)]

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

    [use case]

    Returns a immutable parallel vector formed from this immutable parallel vector 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 immutable parallel vector containing pairs consisting of corresponding elements of this immutable parallel vector and that. The length of the returned collection is the minimum of the lengths of this immutable parallel vector and that.

    Definition Classes
    ParSeqLikeParIterableLikeGenIterableLike
    Full Signature

    def zip[U >: T, S, That](that: GenIterable[S])(implicit bf: CanBuildFrom[ParVector[T], (U, S), That]): That

  166. def zipAll[B](that: Iterable[B], thisElem: A, thatElem: B): ParVector[(A, B)]

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

    [use case]

    Returns a immutable parallel vector formed from this immutable parallel vector 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 immutable parallel vector is shorter than that.

    thatElem

    the element to be used to fill up the result if that is shorter than this immutable parallel vector.

    returns

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

    Definition Classes
    ParIterableLikeGenIterableLike
    Full Signature

    def zipAll[S, U >: T, That](that: GenIterable[S], thisElem: U, thatElem: S)(implicit bf: CanBuildFrom[ParVector[T], (U, S), That]): That

  167. def zipWithIndex: ParVector[(A, Int)]

    [use case] Zips this immutable parallel vector with its indices.

    [use case]

    Zips this immutable parallel vector with its indices.

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

    returns

    A new immutable parallel vector containing pairs consisting of all elements of this immutable parallel vector paired with their index. Indices start at 0.

    Definition Classes
    ParIterableLikeGenIterableLike
    Full Signature

    def zipWithIndex[U >: T, That](implicit bf: CanBuildFrom[ParVector[T], (U, Int), That]): That

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

  168. def [B](y: B): (ParVector[T], B)
    Implicit
    This member is added by an implicit conversion from ParVector[T] to ArrowAssoc[ParVector[T]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Deprecated Value Members

  1. def view: SeqView[T, immutable.Vector[T]]
    Definition Classes
    ParSeqLikeParIterableLike
    Annotations
    @deprecated
    Deprecated

    (Since version 2.11.0) use .seq.view

Inherited from Serializable

Inherited from java.io.Serializable

Inherited from ParSeq[T]

Inherited from ParIterable[T]

Inherited from Immutable

Inherited from parallel.ParSeq[T]

Inherited from ParSeqLike[T, ParVector[T], immutable.Vector[T]]

Inherited from parallel.ParIterable[T]

Inherited from ParIterableLike[T, ParVector[T], immutable.Vector[T]]

Inherited from Parallel

Inherited from CustomParallelizable[T, ParVector[T]]

Inherited from GenericParTemplate[T, ParVector]

Inherited from HasNewCombiner[T, scala.collection.parallel.immutable.ParVector[T] @scala.annotation.unchecked.uncheckedVariance]

Inherited from GenSeq[T]

Inherited from GenIterable[T]

Inherited from GenTraversable[T]

Inherited from HasNewBuilder[T, scala.collection.parallel.immutable.ParVector[T] @scala.annotation.unchecked.uncheckedVariance]

Inherited from GenSeqLike[T, ParVector[T]]

Inherited from Equals

Inherited from GenIterableLike[T, ParVector[T]]

Inherited from GenTraversableLike[T, ParVector[T]]

Inherited from Parallelizable[T, ParVector[T]]

Inherited from GenTraversableOnce[T]

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion CollectionsHaveToParArray from ParVector[T] to CollectionsHaveToParArray[ParVector[T], T]

Inherited by implicit conversion any2stringadd from ParVector[T] to any2stringadd[ParVector[T]]

Inherited by implicit conversion StringFormat from ParVector[T] to StringFormat[ParVector[T]]

Inherited by implicit conversion Ensuring from ParVector[T] to Ensuring[ParVector[T]]

Inherited by implicit conversion ArrowAssoc from ParVector[T] to ArrowAssoc[ParVector[T]]

Ungrouped