Scala Standard Library2.12.4 < Back
 

# Packages

-  package root

  This is the documentation for the Scala standard library.

  This is the documentation for the Scala standard library.

  #### Package structure

  The scala package contains core types like `Int`, `Float`, `Array` or `Option` which are accessible in all Scala compilation units without explicit qualification or imports.

  Notable packages include:

  - `scala.collection` and its sub-packages contain Scala's collections framework
    - `scala.collection.immutable` - Immutable, sequential data-structures such as `Vector`, `List`, `Range`, `HashMap` or `HashSet`
    - `scala.collection.mutable` - Mutable, sequential data-structures such as `ArrayBuffer`, `StringBuilder`, `HashMap` or `HashSet`
    - `scala.collection.concurrent` - Mutable, concurrent data-structures such as `TrieMap`
    - `scala.collection.parallel.immutable` - Immutable, parallel data-structures such as `ParVector`, `ParRange`, `ParHashMap` or `ParHashSet`
    - `scala.collection.parallel.mutable` - Mutable, parallel data-structures such as `ParArray`, `ParHashMap`, `ParTrieMap` or `ParHashSet`
  - `scala.concurrent` - Primitives for concurrent programming such as `Futures` and `Promises`
  - `scala.io` - Input and output operations
  - `scala.math` - Basic math functions and additional numeric types like `BigInt` and `BigDecimal`
  - `scala.sys` - Interaction with other processes and the operating system
  - `scala.util.matching` - Regular expressions

  Other packages exist. See the complete list on the right.

  Additional parts of the standard library are shipped as separate libraries. These include:

  - `scala.reflect` - Scala's reflection API (scala-reflect.jar)
  - `scala.xml` - XML parsing, manipulation, and serialization (scala-xml.jar)
  - `scala.swing` - A convenient wrapper around Java's GUI framework called Swing (scala-swing.jar)
  - `scala.util.parsing` - Parser combinators (scala-parser-combinators.jar)

  #### Automatic imports

  Identifiers in the scala package and the `scala.Predef` object are always in scope by default.

  Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example, `List` is an alias for `scala.collection.immutable.List`.

  Other aliases refer to classes provided by the underlying platform. For example, on the JVM, `String` is an alias for `java.lang.String`.

  Definition Classes
    root
-  package scala

  Core Scala types.

  Core Scala types. They are always available without an explicit import.

  Definition Classes
    root
-  package collection

  Contains the base traits and objects needed to use and extend Scala's collection library.

  Contains the base traits and objects needed to use and extend Scala's collection library.

  #### Guide

  A detailed guide for using the collections library is available at http://docs.scala-lang.org/overviews/collections/introduction.html. Developers looking to extend the collections library can find a description of its architecture at http://docs.scala-lang.org/overviews/core/architecture-of-scala-collections.html.

  #### Using Collections

  It is convenient to treat all collections as either a scala.collection.Traversable or scala.collection.Iterable, as these traits define the vast majority of operations on a collection.

  Collections can, of course, be treated as specifically as needed, and the library is designed to ensure that the methods that transform collections will return a collection of the same type:

      scala> val array = Array(1,2,3,4,5,6)
      array: Array[Int] = Array(1, 2, 3, 4, 5, 6)

      scala> array map { _.toString }
      res0: Array[String] = Array(1, 2, 3, 4, 5, 6)

      scala> val list = List(1,2,3,4,5,6)
      list: List[Int] = List(1, 2, 3, 4, 5, 6)

      scala> list map { _.toString }
      res1: List[String] = List(1, 2, 3, 4, 5, 6)

  #### Creating Collections

  The most common way to create a collection is to use its companion object as a factory. The three most commonly used collections are scala.collection.Seq, scala.collection.immutable.Set, and scala.collection.immutable.Map. They can be used directly as shown below since their companion objects are all available as type aliases in either the scala package or in `scala.Predef`. New collections are created like this:

      scala> val seq = Seq(1,2,3,4,1)
      seq: Seq[Int] = List(1, 2, 3, 4, 1)

      scala> val set = Set(1,2,3,4,1)
      set: scala.collection.immutable.Set[Int] = Set(1, 2, 3, 4)

      scala> val map = Map(1 -> "one", 2 -> "two", 3 -> "three", 2 -> "too")
      map: scala.collection.immutable.Map[Int,String] = Map(1 -> one, 2 -> too, 3 -> three)

  It is also typical to prefer the scala.collection.immutable collections over those in scala.collection.mutable; the types aliased in the `scala.Predef` object are the immutable versions.

  Also note that the collections library was carefully designed to include several implementations of each of the three basic collection types. These implementations have specific performance characteristics which are described in the guide.

  The concrete parallel collections also have specific performance characteristics which are described in the parallel collections guide

  ##### Converting to and from Java Collections

  The scala.collection.JavaConverters object provides a collection of decorators that allow converting between Scala and Java collections using `asScala` and `asJava` methods.

  Definition Classes
    scala
-  package parallel

  Package object for parallel collections.

  Package object for parallel collections.

  Definition Classes
    collection
-  package immutable
  Definition Classes
    parallel
-  package mutable
  Definition Classes
    parallel
- AdaptiveWorkStealingForkJoinTasks
- AdaptiveWorkStealingTasks
- AdaptiveWorkStealingThreadPoolTasks
- CollectionsHaveToParArray
- Combiner
- CombinerFactory
- CompositeThrowable
- ExecutionContextTaskSupport
- ExecutionContextTasks
- FactoryOps
- ForkJoinTaskSupport
- ForkJoinTasks
- FutureThreadPoolTasks
- HavingForkJoinPool
- IterableSplitter
- ParIterable
- ParIterableLike
- ParMap
- ParMapLike
- ParSeq
- ParSeqLike
- ParSet
- ParSetLike
- PreciseSplitter
- SeqSplitter
- Splitter
- Task
- TaskSupport
- Tasks
- ThreadPoolTaskSupport
- ThreadPoolTasks
- ThrowableOps
- TraversableOps

t

scala.collection.parallel

# ParSeq 

###
Companion object ParSeq

#### trait ParSeq[+T] extends GenSeq[T] with ParIterable[T] with GenericParTemplate[T, ParSeq] with ParSeqLike[T, ParSeq[T], scala.Seq[T]]

A template trait for parallel sequences.

Parallel sequences inherit the `Seq` trait. Their indexing and length computations are defined to be efficient. Like their sequential counterparts they always have a defined order of elements. This means they will produce resulting parallel sequences in the same way sequential sequences do. However, the order in which they perform bulk operations on elements to produce results is not defined and is generally nondeterministic. If the higher-order functions given to them produce no sideeffects, then this won't be noticeable.

This trait defines a new, more general `split` operation and reimplements the `split` operation of `ParallelIterable` trait using the new `split` operation.

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 type of the elements in this parallel sequence

Source
  ParSeq.scala

Linear Supertypes
ParSeqLike[T, ParSeq[T], scala.Seq[T]], ParIterable[T], ParIterableLike[T, ParSeq[T], scala.Seq[T]], Parallel, CustomParallelizable[T, ParSeq[T]], GenericParTemplate[T, ParSeq], HasNewCombiner[T, scala.collection.parallel.ParSeq[T] @scala.annotation.unchecked.uncheckedVariance], GenSeq[T], GenIterable[T], GenTraversable[T], GenericTraversableTemplate[T, ParSeq], HasNewBuilder[T, scala.collection.parallel.ParSeq[T] @scala.annotation.unchecked.uncheckedVariance], GenSeqLike[T, ParSeq[T]], Equals, GenIterableLike[T, ParSeq[T]], GenTraversableLike[T, ParSeq[T]], Parallelizable[T, ParSeq[T]], GenTraversableOnce[T], AnyRef, Any
Known Subclasses
ParRange, ParSeq, ParVector, ParArray, ParSeq
Type Hierarchy
 
Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. ParSeq
2. ParSeqLike
3. ParIterable
4. ParIterableLike
5. Parallel
6. CustomParallelizable
7. GenericParTemplate
8. HasNewCombiner
9. GenSeq
10. GenIterable
11. GenTraversable
12. GenericTraversableTemplate
13. HasNewBuilder
14. GenSeqLike
15. Equals
16. GenIterableLike
17. GenTraversableLike
18. Parallelizable
19. GenTraversableOnce
20. AnyRef
21. Any

Implicitly

1. by CollectionsHaveToParArray
2. by any2stringadd
3. by StringFormat
4. by Ensuring
5. by ArrowAssoc

1. Hide All
2. Show All

Visibility

1. Public
2. All

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

### Abstract Value Members

1.  abstract def apply(i: Int): T

   Selects an element by its index in the parallel iterable.

   Selects an element by its index in the parallel iterable.

   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

   returns

     the element of this parallel iterable at index `idx`, where `0` indicates the first element.

   Definition Classes
     ParSeq → GenSeqLike
   Exceptions thrown

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

2.  abstract def length: Int

   The length of the general sequence.

   The length of the general sequence.

   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 general sequence.

   Definition Classes
     GenSeqLike
   Exceptions thrown

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

3.  abstract def seq: scala.Seq[T]
   Definition Classes
     ParIterableLike → Parallelizable → GenTraversableOnce
4.  abstract 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

   Attributes
     protected[scala.collection.parallel]
   Definition Classes
     ParSeqLike → ParIterableLike

### Concrete 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 ParSeq[T] to any2stringadd[ParSeq[T]] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ++[U >: T, That](that: GenTraversableOnce[U])(implicit bf: CanBuildFrom[ParSeq[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
     ParIterableLike → GenTraversableLike
5.  def +:(elem: A): ParIterable[A]

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

   [use case]

   A copy of the parallel iterable 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 parallel iterable 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 parallel iterable consisting of `elem` followed by all elements of this parallel iterable.

   Definition Classes
     ParSeqLike → GenSeqLike
    Full Signature

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

6.  def ->[B](y: B): (ParSeq[T], B)
   Implicit
     This member is added by an implicit conversion from ParSeq[T] to ArrowAssoc[ParSeq[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
     ParIterableLike → GenTraversableOnce
8.  def :+(elem: A): ParIterable[A]

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

   [use case]

   A copy of this parallel iterable 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 parallel iterable consisting of all elements of this parallel iterable followed by `elem`.

   Definition Classes
     ParSeqLike → GenSeqLike
    Full Signature

   #### def :+[U >: T, That](elem: U)(implicit bf: CanBuildFrom[ParSeq[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
     ParIterableLike → GenTraversableOnce
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
      ParIterableLike → GenTraversableOnce
12.  final def asInstanceOf[T0]: T0

    Cast the receiver object to be of type `T0`.

    Cast the receiver object to be of type `T0`.

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

    returns

      the receiver object.

    Definition Classes
      Any
    Exceptions thrown

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

13.  def bf2seq[S, That](bf: CanBuildFrom[ParSeq[T], S, That]): CanBuildFrom[scala.Seq[T], S, That]
    Attributes
      protected[this]
    Definition Classes
      ParIterableLike
14.  implicit def builder2ops[Elem, To](cb: Builder[Elem, To]): BuilderOps[Elem, To]
    Attributes
      protected
    Definition Classes
      ParIterableLike
15.  def canEqual(other: Any): Boolean
    Definition Classes
      ParIterableLike
16.  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

17.  def collect[B](pf: PartialFunction[A, B]): ParIterable[B]

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

    [use case]

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

    B

      the element type of the returned collection.

    pf

      the partial function which filters and maps the parallel iterable.

    returns

      a new parallel iterable 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
      ParIterableLike → GenTraversableLike
     Full Signature

    #### def collect[S, That](pf: PartialFunction[T, S])(implicit bf: CanBuildFrom[ParSeq[T], S, That]): That

18.  def combinerFactory[S, That](cbf: () ⇒ Combiner[S, That]): CombinerFactory[S, That]
    Attributes
      protected[this]
    Definition Classes
      ParIterableLike
19.  def combinerFactory: CombinerFactory[T, ParSeq[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
20.  def companion: GenericCompanion[ParSeq] with GenericParCompanion[ParSeq]

    The factory companion object that builds instances of class `ParIterable`.

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

    Definition Classes
      ParSeq → ParIterable → GenericParTemplate → GenSeq → GenIterable → GenTraversable → GenericTraversableTemplate
21.  def copyToArray(xs: Array[A], start: Int, len: Int): Unit

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

    [use case]

    Copies the elements of this parallel iterable to an array. Fills the given array `xs` with at most `len` elements of this parallel iterable, starting at position `start`. Copying will stop once either the end of the current parallel iterable 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
      ParIterableLike → GenTraversableOnce
     Full Signature

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

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

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

    [use case]

    Copies the elements of this parallel iterable to an array. Fills the given array `xs` with values of this parallel iterable, beginning at index `start`. Copying will stop once either the end of the current parallel iterable 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
      ParIterableLike → GenTraversableOnce
     Full Signature

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

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

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

    [use case]

    Copies the elements of this parallel iterable to an array. Fills the given array `xs` with values of this parallel iterable. Copying will stop once either the end of the current parallel iterable 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
      ParIterableLike → GenTraversableOnce
     Full Signature

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

24.  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
      ParSeqLike → GenSeqLike
25.  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
      ParIterableLike → GenTraversableOnce
26.  def debugBuffer: ArrayBuffer[String]
    Definition Classes
      ParIterableLike
27.  implicit def delegatedSignalling2ops[PI <: DelegatedSignalling](it: PI): SignallingOps[PI]
    Attributes
      protected
    Definition Classes
      ParIterableLike
28.  def diff(that: GenSeq[A]): ParIterable[A]

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

    [use case]

    Computes the multiset difference between this parallel iterable and another sequence.

    Note: will not terminate for infinite-sized collections.

    that

      the sequence of elements to remove

    returns

      a new parallel iterable which contains all elements of this parallel iterable 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
      ParSeqLike → GenSeqLike
     Full Signature

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

29.  def distinct: ParSeq[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
      ParSeqLike → GenSeqLike
30.  def down(p: IterableSplitter[_]): SeqSplitter[T]
    Attributes
      protected[this]
    Definition Classes
      ParSeqLike
31.  def drop(n: Int): ParSeq[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
      ParIterableLike → GenTraversableLike
32.  def dropWhile(pred: (T) ⇒ Boolean): ParSeq[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
      ParIterableLike → GenTraversableLike
33.  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
      ParSeqLike → GenSeqLike
34.  def ensuring(cond: (ParSeq[T]) ⇒ Boolean, msg: ⇒ Any): ParSeq[T]
    Implicit
      This member is added by an implicit conversion from ParSeq[T] to Ensuring[ParSeq[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
35.  def ensuring(cond: (ParSeq[T]) ⇒ Boolean): ParSeq[T]
    Implicit
      This member is added by an implicit conversion from ParSeq[T] to Ensuring[ParSeq[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
36.  def ensuring(cond: Boolean, msg: ⇒ Any): ParSeq[T]
    Implicit
      This member is added by an implicit conversion from ParSeq[T] to Ensuring[ParSeq[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
37.  def ensuring(cond: Boolean): ParSeq[T]
    Implicit
      This member is added by an implicit conversion from ParSeq[T] to Ensuring[ParSeq[T]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
38.  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
39.  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
      GenSeqLike → Equals → Any
40.  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
      ParIterableLike → GenTraversableOnce
41.  def filter(pred: (T) ⇒ Boolean): ParSeq[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
      ParIterableLike → GenTraversableLike
42.  def filterNot(pred: (T) ⇒ Boolean): ParSeq[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
      ParIterableLike → GenTraversableLike
43.  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

44.  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
      ParIterableLike → GenTraversableOnce
45.  def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): ParIterable[B]

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

    [use case]

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

    Definition Classes
      ParIterableLike → GenTraversableLike
     Full Signature

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

46.  def flatten[B]: ParIterable[B]

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

    [use case]

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

    The resulting collection's type will be guided by the static type of parallel iterable. 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 parallel iterable resulting from concatenating all element parallel iterables.

    Definition Classes
      GenericTraversableTemplate
     Full Signature

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

47.  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
      ParIterableLike → GenTraversableOnce
48.  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
      ParIterableLike → GenTraversableOnce
49.  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
      ParIterableLike → GenTraversableOnce
50.  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
      ParIterableLike → GenTraversableOnce
51.  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
      ParIterableLike → GenTraversableLike → GenTraversableOnce
52.  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 ParSeq[T] to StringFormat[ParSeq[T]] performed by method StringFormat in scala.Predef.
    Definition Classes
      StringFormat
    Annotations
      @inline()
53.  def genericBuilder[B]: Combiner[B, ParSeq[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
      GenericParTemplate → GenericTraversableTemplate
54.  def genericCombiner[B]: Combiner[B, ParSeq[B]]
    Definition Classes
      GenericParTemplate
55.  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()
56.  def groupBy[K](f: (T) ⇒ K): immutable.ParMap[K, ParSeq[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
      ParIterableLike → GenTraversableLike
57.  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
      ParIterableLike → GenTraversableOnce
58.  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
      GenSeqLike → Any
59.  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
      ParIterableLike → GenTraversableLike
    Exceptions thrown

      `NoSuchElementException` if the parallel iterable is empty.

60.  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
      ParIterableLike → GenTraversableLike
61.  def indexOf(elem: T, from: Int): Int

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

    [use case]

    Finds index of first occurrence of some value in this parallel iterable 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 parallel iterable 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

62.  def indexOf(elem: T): Int

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

    [use case]

    Finds index of first occurrence of some value in this parallel iterable.

    Note: may not terminate for infinite-sized collections.

    elem

      the element value to search for.

    returns

      the index of the first element of this parallel iterable 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

63.  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
      ParSeqLike → GenSeqLike
64.  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
65.  def init: ParSeq[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
      ParIterableLike → GenTraversableLike
    Exceptions thrown

      `UnsupportedOperationException` if the parallel iterable is empty.

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

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

    [use case]

    Computes the multiset intersection between this parallel iterable and another sequence.

    Note: may not terminate for infinite-sized collections.

    that

      the sequence of elements to intersect with.

    returns

      a new parallel iterable which contains all elements of this parallel iterable 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
      ParSeqLike → GenSeqLike
     Full Signature

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

68.  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
69.  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
      ParIterableLike → GenTraversableOnce
70.  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
71.  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
72.  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
      ParIterableLike → GenTraversableLike → GenTraversableOnce
73.  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
      ParSeqLike → ParIterableLike → GenIterableLike
74.  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
      ParIterableLike → GenTraversableLike
    Exceptions thrown

      `NoSuchElementException` If the parallel iterable is empty.

75.  def lastIndexOf(elem: T, end: Int): Int

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

    [use case]

    Finds index of last occurrence of some value in this parallel iterable 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 parallel iterable 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

76.  def lastIndexOf(elem: T): Int

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

    [use case]

    Finds index of last occurrence of some value in this parallel iterable.

    Note: will not terminate for infinite-sized collections.

    elem

      the element value to search for.

    returns

      the index of the last element of this parallel iterable 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

77.  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
      ParSeqLike → GenSeqLike
78.  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
79.  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
      ParIterableLike → GenTraversableLike
80.  def map[B](f: (A) ⇒ B): ParIterable[B]

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

    [use case]

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

    B

      the element type of the returned collection.

    f

      the function to apply to each element.

    returns

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

    Definition Classes
      ParIterableLike → GenTraversableLike
     Full Signature

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

81.  def max: A

    [use case] Finds the largest element.

    [use case]

    Finds the largest element.

    returns

      the largest element of this parallel iterable.

    Definition Classes
      ParIterableLike → GenTraversableOnce
     Full Signature

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

82.  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 parallel iterable with the largest value measured by function f.

    Definition Classes
      ParIterableLike → GenTraversableOnce
     Full Signature

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

83.  def min: A

    [use case] Finds the smallest element.

    [use case]

    Finds the smallest element.

    returns

      the smallest element of this parallel iterable

    Definition Classes
      ParIterableLike → GenTraversableOnce
     Full Signature

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

84.  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 parallel iterable with the smallest value measured by function f.

    Definition Classes
      ParIterableLike → GenTraversableOnce
     Full Signature

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

85.  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
      ParIterableLike → GenTraversableOnce
86.  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
      ParIterableLike → GenTraversableOnce
    Example:

    1. `List(1, 2, 3).mkString("|") = "1|2|3"`

87.  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
      ParIterableLike → GenTraversableOnce
    Example:

    1. `List(1, 2, 3).mkString("(", "; ", ")") = "(1; 2; 3)"`

88.  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
89.  def newBuilder: Builder[T, ParSeq[T]]

    The builder that builds instances of type Traversable[A]

    The builder that builds instances of type Traversable[A]

    Attributes
      protected[this]
    Definition Classes
      GenericParTemplate → GenericTraversableTemplate → HasNewBuilder
90.  def newCombiner: Combiner[T, ParSeq[T]]
    Attributes
      protected[this]
    Definition Classes
      GenericParTemplate → HasNewCombiner
91.  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
      ParIterableLike → GenTraversableOnce
92.  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

93.  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

94.  def padTo(len: Int, elem: A): ParIterable[A]

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

    [use case]

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

    len

      the target length

    elem

      the padding value

    returns

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

    Definition Classes
      ParSeqLike → GenSeqLike
     Full Signature

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

95.  def par: ParSeq[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
      ParIterableLike → CustomParallelizable → Parallelizable
96.  def parCombiner: Combiner[T, ParSeq[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
      CustomParallelizable → Parallelizable
97.  def partition(pred: (T) ⇒ Boolean): (ParSeq[T], ParSeq[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
      ParIterableLike → GenTraversableLike
98.  def patch(from: Int, that: GenSeq[A], replaced: Int): ParIterable[A]

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

    [use case]

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

    from

      the index of the first replaced element

    replaced

      the number of elements to drop in the original parallel iterable

    returns

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

    Definition Classes
      ParSeqLike → GenSeqLike
     Full Signature

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

99.  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
100.  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 parallel iterable 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 parallel iterable and as result type of `product`. Examples of such types are: `Long`, `Float`, `Double`, `BigInt`.

     Definition Classes
       ParIterableLike → GenTraversableOnce
      Full Signature

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

101.  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
       ParIterableLike → GenTraversableOnce
     Exceptions thrown

       `UnsupportedOperationException` if this parallel iterable is empty.

102.  def reduceLeft[U >: T](op: (U, T) ⇒ U): U
     Definition Classes
       ParIterableLike
103.  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
       ParIterableLike → GenTraversableOnce
104.  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
       ParIterableLike → GenTraversableOnce
105.  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
       ParIterableLike → GenTraversableOnce
     Exceptions thrown

       `UnsupportedOperationException` if this parallel iterable is empty.

106.  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
       ParIterableLike → GenTraversableOnce
107.  def repr: ParSeq[T]
     Definition Classes
       ParIterableLike → GenTraversableLike
108.  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
109.  def reverse: ParSeq[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
       ParSeqLike → GenSeqLike
110.  def reverseMap[B](f: (A) ⇒ B): ParIterable[B]

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

     [use case]

     Builds a new collection by applying a function to all elements of this parallel iterable 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 parallel iterable resulting from applying the given function `f` to each element of this parallel iterable and collecting the results in reversed order.

     Definition Classes
       ParSeqLike → GenSeqLike
      Full Signature

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

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

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

     [use case]

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

     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
       ParSeqLike → ParIterableLike → GenIterableLike
      Full Signature

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

112.  def scan(z: T)(op: (T, T) ⇒ T): ParIterable[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 parallel iterable containing the prefix scan of the elements in this parallel iterable

     Definition Classes
       ParIterableLike → GenTraversableLike
      Full Signature

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

113.  def scanBlockSize: Int
     Attributes
       protected[this]
     Definition Classes
       ParIterableLike
114.  def scanLeft[S, That](z: S)(op: (S, T) ⇒ S)(implicit bf: CanBuildFrom[ParSeq[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
       ParIterableLike → GenTraversableLike
115.  def scanRight[S, That](z: S)(op: (T, S) ⇒ S)(implicit bf: CanBuildFrom[ParSeq[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
       ParIterableLike → GenTraversableLike
116.  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
       ParSeqLike → GenSeqLike
117.  def sequentially[S, That <: Parallel](b: (scala.Seq[T]) ⇒ Parallelizable[S, That]): ParSeq[T]
     Attributes
       protected[this]
     Definition Classes
       ParIterableLike
118.  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
       ParSeqLike → GenTraversableLike → GenTraversableOnce
119.  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
120.  def slice(unc_from: Int, unc_until: Int): ParSeq[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
       ParIterableLike → GenTraversableLike
121.  def span(pred: (T) ⇒ Boolean): (ParSeq[T], ParSeq[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
       ParIterableLike → GenTraversableLike
122.  def splitAt(n: Int): (ParSeq[T], ParSeq[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
       ParIterableLike → GenTraversableLike
123.  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
       ParSeqLike → GenSeqLike
124.  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
125.  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
       ParSeq → ParIterable → GenTraversableLike
126.  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 parallel iterable 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 parallel iterable and as result type of `sum`. Examples of such types are: `Long`, `Float`, `Double`, `BigInt`.

     Definition Classes
       ParIterableLike → GenTraversableOnce
      Full Signature

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

127.  final def synchronized[T0](arg0: ⇒ T0): T0
     Definition Classes
       AnyRef
128.  def tail: ParSeq[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
       ParIterableLike → GenTraversableLike
     Exceptions thrown

       `UnsupportedOperationException` if the parallel iterable is empty.

129.  def take(n: Int): ParSeq[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
       ParIterableLike → GenTraversableLike
130.  def takeWhile(pred: (T) ⇒ Boolean): ParSeq[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
       ParIterableLike → GenTraversableLike
131.  implicit def task2ops[R, Tp](tsk: SSCTask[R, Tp]): TaskOps[R, Tp]
     Attributes
       protected
     Definition Classes
       ParIterableLike
132.  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

133.  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

134.  def to[Col[_]]: Col[A]

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

     [use case]

     Converts this parallel iterable 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 parallel iterable.

     Definition Classes
       ParIterableLike → GenTraversableOnce
      Full Signature

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

135.  def toArray: Array[A]

     [use case] Converts this parallel iterable to an array.

     [use case]

     Converts this parallel iterable to an array.

     Note: will not terminate for infinite-sized collections.

     returns

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

     Definition Classes
       ParIterableLike → GenTraversableOnce
      Full Signature

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

136.  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
       ParIterableLike → GenTraversableOnce
137.  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
       ParIterableLike → GenTraversableOnce
138.  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
       ParIterableLike → GenTraversableOnce
139.  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
       ParIterableLike → GenTraversableOnce
140.  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
       ParIterableLike → GenTraversableOnce
141.  def toMap[T, U]: collection.Map[T, U]

     [use case] Converts this parallel iterable to a map.

     [use case]

     Converts this parallel iterable 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 parallel iterable.

     Definition Classes
       ParIterableLike → GenTraversableOnce
      Full Signature

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

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

     Converts this parallel iterable to a sequence.

     Converts this parallel iterable 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 parallel iterable.

     Definition Classes
       ParSeqLike → ParIterableLike → GenSeqLike → GenTraversableOnce
146.  def toSet[U >: T]: immutable.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
       ParIterableLike → GenTraversableOnce
147.  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
       ParIterableLike → GenTraversableOnce
148.  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
       ParSeq → ParSeqLike → ParIterableLike → AnyRef → Any
149.  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
       ParIterableLike → GenTraversableOnce
150.  def toVector: Vector[T]

     Converts this parallel iterable to a Vector.

     Converts this parallel iterable to a Vector.

     Note: will not terminate for infinite-sized collections.

     returns

       a vector containing all elements of this parallel iterable.

     Definition Classes
       ParIterableLike → GenTraversableOnce
151.  def transpose[B](implicit asTraversable: (T) ⇒ GenTraversableOnce[B]): ParSeq[ParSeq[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.

152.  def union(that: GenSeq[T]): ParIterable[T]

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

     [use case]

     Produces a new sequence which contains all elements of this parallel iterable 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 parallel iterable which contains all elements of this parallel iterable followed by all elements of `that`.

     Definition Classes
       GenSeqLike
      Full Signature

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

153.  def unzip[A1, A2](implicit asPair: (T) ⇒ (A1, A2)): (ParSeq[A1], ParSeq[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
154.  def unzip3[A1, A2, A3](implicit asTriple: (T) ⇒ (A1, A2, A3)): (ParSeq[A1], ParSeq[A2], ParSeq[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
155.  def updated(index: Int, elem: A): ParIterable[A]

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

     [use case]

     A copy of this parallel iterable with one single replaced element.

     index

       the position of the replacement

     elem

       the replacing element

     returns

       a copy of this parallel iterable with the element at position `index` replaced by `elem`.

     Definition Classes
       ParSeqLike → GenSeqLike
      Full Signature

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

156.  final def wait(): Unit
     Definition Classes
       AnyRef
     Annotations
       @throws( ... )
157.  final def wait(arg0: Long, arg1: Int): Unit
     Definition Classes
       AnyRef
     Annotations
       @throws( ... )
158.  final def wait(arg0: Long): Unit
     Definition Classes
       AnyRef
     Annotations
       @native() @throws( ... )
159.  def withFilter(pred: (T) ⇒ Boolean): ParSeq[T]
     Definition Classes
       ParIterableLike
160.  def wrap[R](body: ⇒ R): NonDivisible[R]
     Attributes
       protected
     Definition Classes
       ParIterableLike
161.  def zip[B](that: GenIterable[B]): ParIterable[(A, B)]

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

     [use case]

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

     Definition Classes
       ParSeqLike → ParIterableLike → GenIterableLike
      Full Signature

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

162.  def zipAll[B](that: Iterable[B], thisElem: A, thatElem: B): ParIterable[(A, B)]

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

     [use case]

     Returns a parallel iterable formed from this parallel iterable 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 parallel iterable is shorter than `that`.

     thatElem

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

     returns

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

     Definition Classes
       ParIterableLike → GenIterableLike
      Full Signature

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

163.  def zipWithIndex: ParIterable[(A, Int)]

     [use case] Zips this parallel iterable with its indices.

     [use case]

     Zips this parallel iterable with its indices.

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

     returns

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

     Definition Classes
       ParIterableLike → GenIterableLike
      Full Signature

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

     Example:

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

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

### Deprecated Value Members

1.  def view: SeqView[T, scala.Seq[T]]
   Definition Classes
     ParSeqLike → ParIterableLike
   Annotations
     @deprecated
   Deprecated

     (Since version 2.11.0) use .seq.view

### Inherited from ParSeqLike[T, ParSeq[T], scala.Seq[T]]

### Inherited from ParIterable[T]

### Inherited from ParIterableLike[T, ParSeq[T], scala.Seq[T]]

### Inherited from Parallel

### Inherited from CustomParallelizable[T, ParSeq[T]]

### Inherited from GenericParTemplate[T, ParSeq]

### Inherited from HasNewCombiner[T, scala.collection.parallel.ParSeq[T] @scala.annotation.unchecked.uncheckedVariance]

### Inherited from GenSeq[T]

### Inherited from GenIterable[T]

### Inherited from GenTraversable[T]

### Inherited from GenericTraversableTemplate[T, ParSeq]

### Inherited from HasNewBuilder[T, scala.collection.parallel.ParSeq[T] @scala.annotation.unchecked.uncheckedVariance]

### Inherited from GenSeqLike[T, ParSeq[T]]

### Inherited from Equals

### Inherited from GenIterableLike[T, ParSeq[T]]

### Inherited from GenTraversableLike[T, ParSeq[T]]

### Inherited from Parallelizable[T, ParSeq[T]]

### Inherited from GenTraversableOnce[T]

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion CollectionsHaveToParArray from ParSeq[T] to CollectionsHaveToParArray[ParSeq[T], T]

### Inherited by implicit conversion any2stringadd from ParSeq[T] to any2stringadd[ParSeq[T]]

### Inherited by implicit conversion StringFormat from ParSeq[T] to StringFormat[ParSeq[T]]

### Inherited by implicit conversion Ensuring from ParSeq[T] to Ensuring[ParSeq[T]]

### Inherited by implicit conversion ArrowAssoc from ParSeq[T] to ArrowAssoc[ParSeq[T]]

### Ungrouped