scala.collection.immutable

# Stream

#### class Stream [+A] extends LinearSeq[A] with GenericTraversableTemplate[A, Stream] with LinearSeqOptimized[A, Stream[A]]

The class `Stream` implements lazy lists where elements are only evaluated when they are needed. Here is an example:

     object Main extends Application {

       def from(n: Int): Stream[Int] =
         Stream.cons(n, from(n + 1))

       def sieve(s: Stream[Int]): Stream[Int] =
         Stream.cons(s.head, sieve(s.tail filter { _ % s.head != 0 }))

       def primes = sieve(from(2))

       primes take 10 print
     }

A

  the type of the elements contained in this stream.

Attributes
  abstract
Self Type
  Stream[A]
Source
  Stream.scala
Version

  1.1 08/08/03

Since

  2.8

Linear Supertypes
LinearSeqOptimized[A, Stream[A]], LinearSeq[A], LinearSeq[A], LinearSeqLike[A, Stream[A]], Seq[A], Seq[A], SeqLike[A, Stream[A]], GenSeq[A], GenSeqLike[A, Stream[A]], PartialFunction[Int, A], (Int) ⇒ A, Iterable[A], Iterable[A], IterableLike[A, Stream[A]], Equals, GenIterable[A], GenIterableLike[A, Stream[A]], Traversable[A], Immutable, Traversable[A], GenTraversable[A], GenericTraversableTemplate[A, Stream], TraversableLike[A, Stream[A]], GenTraversableLike[A, Stream[A]], Parallelizable[A, ParSeq[A]], TraversableOnce[A], GenTraversableOnce[A], FilterMonadic[A, Stream[A]], HasNewBuilder[A, Stream[A]], AnyRef, Any
Known Subclasses
Cons, Empty
Ordering

1. Alphabetic
2. By inheritance

Inherited

1. Hide All
2. Show all

1. Stream
2. LinearSeqOptimized
3. LinearSeq
4. LinearSeq
5. LinearSeqLike
6. Seq
7. Seq
8. SeqLike
9. GenSeq
10. GenSeqLike
11. PartialFunction
12. Function1
13. Iterable
14. Iterable
15. IterableLike
16. Equals
17. GenIterable
18. GenIterableLike
19. Traversable
20. Immutable
21. Traversable
22. GenTraversable
23. GenericTraversableTemplate
24. TraversableLike
25. GenTraversableLike
26. Parallelizable
27. TraversableOnce
28. GenTraversableOnce
29. FilterMonadic
30. HasNewBuilder
31. AnyRef
32. Any

Visibility

1. Public
2. All

### Instance Constructors

1. #### new Stream ()

### Type Members

1. #### type Self = Stream[A]

   The type implementing this traversable

   The type implementing this traversable

   Attributes
     protected
   Definition Classes
     TraversableLike

2. #### class StreamWithFilter extends WithFilter

   A lazier implementation of WithFilter than TraversableLike's.

3. #### class WithFilter extends FilterMonadic[A, Repr]

   A class supporting filtered operations.

### Abstract Value Members

1. #### def tailDefined : Boolean

   Is the tail of this stream defined?

   Is the tail of this stream defined?

   Attributes
     protected abstract

### Concrete Value Members

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

   Attributes
     final
   Definition Classes
     AnyRef

2. #### def != (arg0: Any): Boolean

   Test two objects for inequality.

   Test two objects for inequality.

   returns

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

   Attributes
     final
   Definition Classes
     Any

3. #### def ## (): Int

   Equivalent to `x.hashCode` except for boxed numeric types.

   Equivalent to `x.hashCode` except for boxed numeric types. 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.

   returns

     a hash value consistent with ==

   Attributes
     final
   Definition Classes
     AnyRef → Any

4. #### def ++ [B >: A, That] (that: GenTraversableOnce[B])(implicit bf: CanBuildFrom[Stream[A], B, That]): That

   Create a new stream which contains all elements of this stream followed by all elements of Traversable `that`.

   Create a new stream which contains all elements of this stream followed by all elements of Traversable `that`.

   B

     the element type of the returned collection.

   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 stream followed by all elements of `that`.

   Definition Classes
     Stream → TraversableLike → GenTraversableLike

5. #### def ++ [B >: A, That] (that: TraversableOnce[B])(implicit bf: CanBuildFrom[Stream[A], B, That]): That

   Definition Classes
     TraversableLike
   Annotations
     @bridge()

6. #### def ++: [B >: A, That] (that: Traversable[B])(implicit bf: CanBuildFrom[Stream[A], B, That]): That

   This overload exists because: for the implementation of ++: we should reuse that of ++ because many collections override it with more efficient versions.

   This overload exists because: for the implementation of ++: we should reuse that of ++ because many collections override it with more efficient versions. Since TraversableOnce has no '++' method, we have to implement that directly, but Traversable and down can use the overload.

   Definition Classes
     TraversableLike

7. #### def ++: [B] (that: TraversableOnce[B]): Stream[B]

   [use case] Concatenates this stream with the elements of a traversable collection.

   [use case]

   Concatenates this stream with the elements of a traversable collection. It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one.

   B

     the element type of the returned collection.

   that

     the traversable to append.

   returns

     a new collection of type `That` which contains all elements of this stream followed by all elements of `that`.

   Attributes
     abstract
   Definition Classes
     TraversableLike

8. #### def ++: [B >: A, That] (that: TraversableOnce[B])(implicit bf: CanBuildFrom[Stream[A], B, That]): That

   Concatenates this stream with the elements of a traversable collection.

   Concatenates this stream with the elements of a traversable collection. It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one.

   B

     the element type of the returned collection.

   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 stream followed by all elements of `that`.

   Definition Classes
     TraversableLike

9. #### def +: (elem: A): Stream[A]

   [use case] Prepends an element to this stream

   [use case]

   Prepends an element to this stream

   elem

     the prepended element

   returns

     a new collection of type `That` consisting of `elem` followed by all elements of this stream.

   Attributes
     abstract
   Definition Classes
     GenSeqLike

10. #### def +: [B >: A, That] (elem: B)(implicit bf: CanBuildFrom[Stream[A], B, That]): That

    Prepends an element to this stream

    Prepends an element to this stream

    B

      the element type of the returned stream.

    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.

    elem

      the prepended 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

      a new collection of type `That` consisting of `elem` followed by all elements of this stream.

    Definition Classes
      Stream → SeqLike → GenSeqLike

11. #### def /: [B] (z: B)(op: (B, A) ⇒ B): B

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

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

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

    Note: will not terminate for infinite-sized collections.

    B

      the result type of the binary operator.

    z

      the start value.

    op

      the binary operator.

    returns

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

                      op(...op(op(z, x,,1,,), x,,2,,), ..., x,,n,,)

      where `x,,1,,, ..., x,,n,,` are the elements of this stream.

    Definition Classes
      TraversableOnce → GenTraversableOnce

12. #### def /:\ [A1 >: A] (z: A1)(op: (A1, A1) ⇒ A1): A1

    A syntactic sugar for out of order folding.

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

    Definition Classes
      GenTraversableOnce

13. #### def :+ (elem: A): Stream[A]

    [use case] Appends an element to this stream

    [use case]

    Appends an element to this stream

    Note: will not terminate for infinite-sized collections.

    elem

      the appended element

    returns

      a new collection of type `That` consisting of all elements of this stream followed by `elem`.

    Attributes
      abstract
    Definition Classes
      GenSeqLike

14. #### def :+ [B >: A, That] (elem: B)(implicit bf: CanBuildFrom[Stream[A], B, That]): That

    Appends an element to this stream

    Appends an element to this stream

    Note: will not terminate for infinite-sized collections.

    B

      the element type of the returned stream.

    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.

    elem

      the appended 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

      a new collection of type `That` consisting of all elements of this stream followed by `elem`.

    Definition Classes
      SeqLike → GenSeqLike

15. #### def :\ [B] (z: B)(op: (A, B) ⇒ B): B

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

    Applies a binary operator to all elements of this stream 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.

    B

      the result type of the binary operator.

    z

      the start value

    op

      the binary operator

    returns

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

                      op(x,,1,,, op(x,,2,,, ... op(x,,n,,, z)...))

      where `x,,1,,, ..., x,,n,,` are the elements of this stream.

    Definition Classes
      TraversableOnce → GenTraversableOnce

16. #### def == (arg0: AnyRef): Boolean

    Attributes
      final
    Definition Classes
      AnyRef

17. #### def == (arg0: Any): Boolean

    Test two objects for equality.

    Test two objects for equality.

    returns

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

    Attributes
      final
    Definition Classes
      Any

18. #### def addString (b: StringBuilder, start: String, sep: String, end: String): StringBuilder

    Write all defined elements of this iterable into given string builder.

    Write all defined elements of this iterable into given string builder. The written text begins with the string `start` and is finished by the string `end`. Inside, the string representations of defined elements (w.r.t. the method `toString()`) are separated by the string `sep`. The method will not force evaluation of undefined elements. A tail of such elements will be represented by a "?" instead.

    b

      the string builder to which elements are appended.

    start

      the starting string.

    sep

      the separator string.

    end

      the ending string.

    returns

      the string builder `b` to which elements were appended.

    Definition Classes
      Stream → TraversableOnce

19. #### def addString (b: StringBuilder): StringBuilder

    Appends all elements of this stream to a string builder.

    Appends all elements of this stream to a string builder. The written text consists of the string representations (w.r.t. the method `toString`) of all elements of this stream without any separator string.

    b

      the string builder to which elements are appended.

    returns

      the string builder `b` to which elements were appended.

    Definition Classes
      TraversableOnce

20. #### def addString (b: StringBuilder, sep: String): StringBuilder

    Appends all elements of this stream to a string builder using a separator string.

    Appends all elements of this stream to a string builder using a separator string. The written text consists of the string representations (w.r.t. the method `toString`) of all elements of this stream, separated by the string `sep`.

    b

      the string builder to which elements are appended.

    sep

      the separator string.

    returns

      the string builder `b` to which elements were appended.

    Definition Classes
      TraversableOnce

21. #### def aggregate [B] (z: B)(seqop: (B, A) ⇒ B, combop: (B, B) ⇒ B): B

    Aggregates the results of applying an operator to subsequent elements.

    Aggregates the results of applying an operator to subsequent elements.

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

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

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

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

    z

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

    seqop

      an operator used to accumulate results within a partition

    combop

      an associative operator used to combine results from different partitions

    Definition Classes
      TraversableOnce → GenTraversableOnce

22. #### def andThen [C] (k: (A) ⇒ C): PartialFunction[Int, C]

    Composes this partial function with a transformation function that gets applied to results of this partial function.

    Composes this partial function with a transformation function that gets applied to results of this partial function.

    C

      the result type of the transformation function.

    k

      the transformation function

    returns

      a partial function with the same domain as this partial function, which maps arguments `x` to `k(this(x))`.

    Definition Classes
      PartialFunction → Function1

23. #### def append [B >: A] (rest: ⇒ TraversableOnce[B]): Stream[B]

    The stream resulting from the concatenation of this stream with the argument stream.

    The stream resulting from the concatenation of this stream with the argument stream.

    rest

      The stream that gets appended to this stream

    returns

      The stream containing elements of this stream and the traversable object.

24. #### def apply (n: Int): A

    Selects an element by its index in the stream.

    Selects an element by its index in the stream. Note: the execution of `apply` may take time proportial to the index value.

    returns

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

    Definition Classes
      LinearSeqOptimized → SeqLike → GenSeqLike

25. #### 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.

    Attributes
      final
    Definition Classes
      Any

26. #### def canEqual (that: Any): Boolean

    Method called from equality methods, so that user-defined subclasses can refuse to be equal to other collections of the same kind.

    Method called from equality methods, so that user-defined subclasses can refuse to be equal to other collections of the same kind.

    that

      The object with which this stream should be compared

    returns

      `true`, if this stream can possibly equal `that`, `false` otherwise. The test takes into consideration only the run-time types of objects but ignores their elements.

    Definition Classes
      IterableLike → Equals

27. #### def clone (): AnyRef

    Create a copy of the receiver object.

    Create a copy of the receiver object.

    The default implementation of the `clone` method is platform dependent.

    returns

      a copy of the receiver object.

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

28. #### def collect [B] (pf: PartialFunction[A, B]): Stream[B]

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

    [use case]

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

    B

      the element type of the returned collection.

    pf

      the partial function which filters and maps the stream.

    returns

      a new collection of type `That` resulting from applying the partial function `pf` to each element on which it is defined and collecting the results. The order of the elements is preserved.

    Attributes
      abstract
    Definition Classes
      GenTraversableLike

29. #### def collect [B, That] (pf: PartialFunction[A, B])(implicit bf: CanBuildFrom[Stream[A], B, That]): That

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

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

    B

      the element type of the returned collection.

    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.

    pf

      the partial function which filters and maps the stream.

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

    Attributes
      final
    Definition Classes
      Stream → TraversableLike → GenTraversableLike

30. #### def collectFirst [B] (pf: PartialFunction[A, B]): Option[B]

    Finds the first element of the stream for which the given partial function is defined, and applies the partial function to it.

    Finds the first element of the stream for which the given partial function is defined, and applies the partial function to it.

    Note: may not terminate for infinite-sized collections.

    pf

      the partial function

    returns

      an option value containing pf applied to the first value for which it is defined, or `None` if none exists.

    Definition Classes
      TraversableOnce
    Example:

    1. `Seq("a", 1, 5L).collectFirst({ case x: Int => x*10 }) = Some(10)`

31. #### def combinations (n: Int): Iterator[Stream[A]]

    Iterates over combinations.

    Iterates over combinations.

    returns

      An Iterator which traverses the possible n-element combinations of this stream.

    Definition Classes
      SeqLike
    Example:

    1. `"abbbc".combinations(2) = Iterator(ab, ac, bb, bc)`

32. #### def companion : GenericCompanion[Stream]

    The factory companion object that builds instances of class Stream.

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

    Definition Classes
      Stream → LinearSeq → LinearSeq → Seq → Seq → GenSeq → Iterable → Iterable → GenIterable → Traversable → Traversable → GenTraversable → GenericTraversableTemplate

33. #### def compose [A] (g: (A) ⇒ Int): (A) ⇒ A

    Composes two instances of Function1 in a new Function1, with this function applied last.

    Composes two instances of Function1 in a new Function1, with this function applied last.

    A

      the type to which function `g` can be applied

    g

      a function A => T1

    returns

      a new function `f` such that `f(x) == apply(g(x))`

    Definition Classes
      Function1

34. #### def contains (elem: Any): Boolean

    Tests whether this stream contains a given value as an element.

    Tests whether this stream contains a given value as an element.

    Note: may not terminate for infinite-sized collections.

    elem

      the element to test.

    returns

      `true` if this stream has an element that is is equal (wrt `==`) to `elem`, `false` otherwise.

    Definition Classes
      SeqLike

35. #### def containsSlice [B] (that: Seq[B]): Boolean

    Definition Classes
      SeqLike
    Annotations
      @bridge()

36. #### def containsSlice [B] (that: GenSeq[B]): Boolean

    Tests whether this stream contains a given sequence as a slice.

    Tests whether this stream contains a given sequence as a slice.

    Note: may not terminate for infinite-sized collections.

    that

      the sequence to test

    returns

      `true` if this stream contains a slice with the same elements as `that`, otherwise `false`.

    Definition Classes
      SeqLike

37. #### def copyToArray (xs: Array[A], start: Int, len: Int): Unit

    [use case] Copies elements of this stream to an array.

    [use case]

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

    xs

      the array to fill.

    start

      the starting index.

    len

      the maximal number of elements to copy.

    Attributes
      abstract
    Definition Classes
      TraversableLike

38. #### def copyToArray [B >: A] (xs: Array[B], start: Int, len: Int): Unit

    Copies elements of this stream to an array.

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

    Note: will not terminate for infinite-sized collections.

    B

      the type of the elements of the array.

    xs

      the array to fill.

    start

      the starting index.

    len

      the maximal number of elements to copy.

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

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

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

    [use case]

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

    xs

      the array to fill.

    Attributes
      abstract
    Definition Classes
      GenTraversableOnce

40. #### def copyToArray [B >: A] (xs: Array[B]): Unit

    Copies values of this stream to an array.

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

    Note: will not terminate for infinite-sized collections.

    B

      the type of the elements of the array.

    xs

      the array to fill.

    Definition Classes
      TraversableOnce → GenTraversableOnce

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

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

    [use case]

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

    xs

      the array to fill.

    start

      the starting index.

    Attributes
      abstract
    Definition Classes
      GenTraversableOnce

42. #### def copyToArray [B >: A] (xs: Array[B], start: Int): Unit

    Copies values of this stream to an array.

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

    Note: will not terminate for infinite-sized collections.

    B

      the type of the elements of the array.

    xs

      the array to fill.

    start

      the starting index.

    Definition Classes
      TraversableOnce → GenTraversableOnce

43. #### def copyToBuffer [B >: A] (dest: Buffer[B]): Unit

    Copies all elements of this stream to a buffer.

    Copies all elements of this stream to a buffer.

    Note: will not terminate for infinite-sized collections.

    dest

      The buffer to which elements are copied.

    Definition Classes
      TraversableOnce

44. #### def corresponds [B] (that: Seq[B])(p: (A, B) ⇒ Boolean): Boolean

    Definition Classes
      SeqLike
    Annotations
      @bridge()

45. #### def corresponds [B] (that: GenSeq[B])(p: (A, B) ⇒ Boolean): Boolean

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

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

    B

      the type of the elements of `that`

    that

      the other sequence

    p

      the test predicate, which relates elements from both sequences

    returns

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

    Definition Classes
      SeqLike → GenSeqLike

46. #### def count (p: (A) ⇒ Boolean): Int

    Counts the number of elements in the stream which satisfy a predicate.

    Counts the number of elements in the stream which satisfy a predicate.

    p

      the predicate used to test elements.

    returns

      the number of elements satisfying the predicate `p`.

    Definition Classes
      LinearSeqOptimized → TraversableOnce → GenTraversableOnce

47. #### def diff [B >: A] (that: Seq[B]): Stream[A]

    Definition Classes
      SeqLike
    Annotations
      @bridge()

48. #### def diff (that: Seq[A]): Stream[A]

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

    [use case]

    Computes the multiset difference between this stream and another sequence.

    Note: will not terminate for infinite-sized collections.

    that

      the sequence of elements to remove

    returns

      a new collection of type `That` which contains all elements of this stream 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.

    Attributes
      abstract
    Definition Classes
      SeqLike

49. #### def diff [B >: A] (that: GenSeq[B]): Stream[A]

    Computes the multiset difference between this stream and another sequence.

    Computes the multiset difference between this stream and another sequence.

    Note: will not terminate for infinite-sized collections.

    B

      the element type of the returned stream.

    that

      the sequence of elements to remove

    returns

      a new collection of type `That` which contains all elements of this stream 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
      SeqLike → GenSeqLike

50. #### def distinct : Stream[A]

    Builds a new stream from this stream in which any duplicates (wrt to ==) removed.

    Builds a new stream from this stream in which any duplicates (wrt to ==) removed. Among duplicate elements, only the first one is retained in the result stream

    returns

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

    Definition Classes
      Stream → SeqLike → GenSeqLike

51. #### def drop (n: Int): Stream[A]

    Selects all elements except first n ones.

    Selects all elements except first n ones.

    n

      the number of elements to drop from this stream.

    returns

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

    Attributes
      final
    Definition Classes
      Stream → LinearSeqOptimized → IterableLike → TraversableLike → GenTraversableLike
    Annotations
      @tailrec()

52. #### def dropRight (n: Int): Stream[A]

    Selects all elements except last n ones.

    Selects all elements except last n ones.

    n

      The number of elements to take

    returns

      a stream consisting of all elements of this stream except the last `n` ones, or else the empty stream, if this stream has less than `n` elements.

    Definition Classes
      LinearSeqOptimized → IterableLike

53. #### def dropWhile (p: (A) ⇒ Boolean): Stream[A]

    Returns the longest suffix of this iterable whose first element does not satisfy the predicate `p`.

    Returns the longest suffix of this iterable whose first element does not satisfy the predicate `p`.

    p

      the test predicate.

    returns

      the longest suffix of this stream whose first element does not satisfy the predicate `p`.

    Definition Classes
      Stream → TraversableLike → GenTraversableLike

54. #### def endsWith [B] (that: Seq[B]): Boolean

    Definition Classes
      SeqLike
    Annotations
      @bridge()

55. #### def endsWith [B] (that: GenSeq[B]): Boolean

    Tests whether this stream ends with the given sequence.

    Tests whether this stream ends with the given sequence.

    Note: will not terminate for infinite-sized collections.

    that

      the sequence to test

    returns

      `true` if this stream has `that` as a suffix, `false` otherwise.

    Definition Classes
      SeqLike → GenSeqLike

56. #### def eq (arg0: AnyRef): Boolean

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

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

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

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

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

    returns

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

    Attributes
      final
    Definition Classes
      AnyRef

57. #### 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 → AnyRef → Any

58. #### def exists (p: (A) ⇒ Boolean): Boolean

    Tests whether a predicate holds for some of the elements of this stream.

    Tests whether a predicate holds for some of the elements of this stream.

    Note: may not terminate for infinite-sized collections.

    p

      the predicate used to test elements.

    returns

      `true` if the given predicate `p` holds for some of the elements of this stream, otherwise `false`.

    Definition Classes
      LinearSeqOptimized → IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

59. #### def filter (p: (A) ⇒ Boolean): Stream[A]

    Returns all the elements of this stream that satisfy the predicate `p`.

    Returns all the elements of this stream that satisfy the predicate `p`. The order of the elements is preserved.

    p

      the predicate used to filter the stream.

    returns

      the elements of this stream satisfying `p`.

    Definition Classes
      Stream → TraversableLike → GenTraversableLike

60. #### def filterNot (p: (A) ⇒ Boolean): Stream[A]

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

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

    p

      the predicate used to test elements.

    returns

      a new stream consisting of all elements of this stream that do not satisfy the given predicate `p`. The order of the elements is preserved.

    Definition Classes
      TraversableLike → GenTraversableLike

61. #### def finalize (): Unit

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

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

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

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

62. #### def find (p: (A) ⇒ Boolean): Option[A]

    Finds the first element of the stream satisfying a predicate, if any.

    Finds the first element of the stream satisfying a predicate, if any.

    Note: may not terminate for infinite-sized collections.

    p

      the predicate used to test elements.

    returns

      an option value containing the first element in the stream that satisfies `p`, or `None` if none exists.

    Definition Classes
      LinearSeqOptimized → IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

63. #### def flatMap [B, That] (f: (A) ⇒ GenTraversableOnce[B])(implicit bf: CanBuildFrom[Stream[A], B, That]): That

    Applies the given function `f` to each element of this stream, then concatenates the results.

    Applies the given function `f` to each element of this stream, then concatenates the results.

    B

      the element type of the returned collection.

    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.

    f

      the function to apply on each 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

      `f(a0) ::: ... ::: f(an)` if this stream is `[a0, ..., an]`.

    Attributes
      final
    Definition Classes
      Stream → TraversableLike → GenTraversableLike → FilterMonadic

64. #### def flatten [B] : Stream[B]

    [use case] Converts this stream of traversable collections into a stream in which all element collections are concatenated.

    [use case]

    Converts this stream of traversable collections into a stream in which all element collections are concatenated.

    B

      the type of the elements of each traversable collection.

    returns

      a new stream resulting from concatenating all element streams.

    Attributes
      abstract
    Definition Classes
      GenericTraversableTemplate

65. #### def flatten [B] (implicit asTraversable: (A) ⇒ TraversableOnce[B]): Stream[B]

    Converts this stream of traversable collections into a stream in which all element collections are concatenated.

    Converts this stream of traversable collections into a stream in which all element collections are concatenated.

    B

      the type of the elements of each traversable collection.

    asTraversable

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

    returns

      a new stream resulting from concatenating all element streams.

    Definition Classes
      Stream → Traversable → GenericTraversableTemplate

66. #### def fold [A1 >: A] (z: A1)(op: (A1, A1) ⇒ A1): A1

    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`.

    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
      TraversableOnce → GenTraversableOnce

67. #### def foldLeft [B] (z: B)(op: (B, A) ⇒ B): B

    Stream specialization of foldLeft which allows GC to collect along the way.

    Stream specialization of foldLeft which allows GC to collect along the way.

    B

      the result type of the binary operator.

    z

      the start value.

    op

      the binary operator.

    returns

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

                      op(...op(z, x,,1,,), x,,2,,, ..., x,,n,,)

      where `x,,1,,, ..., x,,n,,` are the elements of this stream.

    Attributes
      final
    Definition Classes
      Stream → LinearSeqOptimized → TraversableOnce → GenTraversableOnce
    Annotations
      @tailrec()

68. #### def foldRight [B] (z: B)(f: (A, B) ⇒ B): B

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

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

    Note: will not terminate for infinite-sized collections.

    B

      the result type of the binary operator.

    z

      the start value.

    returns

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

                      op(x,,1,,, op(x,,2,,, ... op(x,,n,,, z)...))

      where `x,,1,,, ..., x,,n,,` are the elements of this stream.

    Definition Classes
      LinearSeqOptimized → IterableLike → TraversableOnce → GenTraversableOnce

69. #### def forall (p: (A) ⇒ Boolean): Boolean

    Tests whether a predicate holds for all elements of this stream.

    Tests whether a predicate holds for all elements of this stream.

    Note: may not terminate for infinite-sized collections.

    p

      the predicate used to test elements.

    returns

      `true` if the given predicate `p` holds for all elements of this stream, otherwise `false`.

    Definition Classes
      LinearSeqOptimized → IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

70. #### def force : Stream[A]

    Forces evaluation of the whole stream and returns it.

71. #### def foreach [B] (f: (A) ⇒ B): Unit

    Apply the given function `f` to each element of this linear sequence (while respecting the order of the elements).

    Apply the given function `f` to each element of this linear sequence (while respecting the order of the elements).

    f

      the treatment to apply to each element.

    Attributes
      final
    Definition Classes
      Stream → LinearSeqOptimized → IterableLike → GenericTraversableTemplate → TraversableLike → GenTraversableLike → TraversableOnce → GenTraversableOnce → FilterMonadic
    Annotations
      @tailrec()

72. #### def genericBuilder [B] : Builder[B, Stream[B]]

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

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

    Definition Classes
      GenericTraversableTemplate

73. #### def getClass (): java.lang.Class[_]

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

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

    The nature of the representation is platform dependent.

    returns

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

    Attributes
      final
    Definition Classes
      AnyRef → Any

74. #### def groupBy [K] (f: (A) ⇒ K): Map[K, Stream[A]]

    Partitions this stream into a map of streams according to some discriminator function.

    Partitions this stream into a map of streams 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 stream.

    K

      the type of keys returned by the discriminator function.

    f

      the discriminator function.

    returns

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

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

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

    Definition Classes
      TraversableLike → GenTraversableLike

75. #### def grouped (size: Int): Iterator[Stream[A]]

    Partitions elements in fixed size streams.

    Partitions elements in fixed size streams.

    size

      the number of elements per group

    returns

      An iterator producing streams of size `size`, except the last will be truncated if the elements don't divide evenly.

    Definition Classes
      IterableLike
    See also

      Iterator#grouped

76. #### def hasDefiniteSize : Boolean

    Tests whether this stream is known to have a finite size.

    Tests whether this stream 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.

    Note: many collection methods will not work on collections of infinite sizes.

    returns

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

    Definition Classes
      Stream → TraversableLike → TraversableOnce → GenTraversableOnce

77. #### def hashCode (): Int

    Hashcodes for Stream produce a value from the hashcodes of all the elements of the stream.

    Hashcodes for Stream produce a value from the hashcodes of all the elements of the stream.

    returns

      the hash code value for this object.

    Definition Classes
      GenSeqLike → AnyRef → Any

78. #### def head : A

    Selects the first element of this stream.

    Selects the first element of this stream.

    returns

      the first element of this stream.

    Definition Classes
      IterableLike → GenIterableLike → TraversableLike → GenTraversableLike

79. #### def headOption : Option[A]

    Optionally selects the first element.

    Optionally selects the first element.

    returns

      the first element of this stream if it is nonempty, `None` if it is empty.

    Definition Classes
      TraversableLike

80. #### def indexOf (elem: A, from: Int): Int

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

    [use case]

    Finds index of first occurrence of some value in this stream after or at some start index.

    elem

      the element value to search for.

    from

      the start index

    returns

      the index `>= from` of the first element of this stream that is equal (wrt `==`) to `elem`, or `-1`, if none exists.

    Attributes
      abstract
    Definition Classes
      GenSeqLike

81. #### def indexOf [B >: A] (elem: B, from: Int): Int

    Finds index of first occurrence of some value in this stream after or at some start index.

    Finds index of first occurrence of some value in this stream after or at some start index.

    Note: may not terminate for infinite-sized collections.

    B

      the type of the element `elem`.

    elem

      the element value to search for.

    from

      the start index

    returns

      the index `>= from` of the first element of this stream that is equal (wrt `==`) to `elem`, or `-1`, if none exists.

    Definition Classes
      GenSeqLike

82. #### def indexOf (elem: A): Int

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

    [use case]

    Finds index of first occurrence of some value in this stream.

    elem

      the element value to search for.

    returns

      the index of the first element of this stream that is equal (wrt `==`) to `elem`, or `-1`, if none exists.

    Attributes
      abstract
    Definition Classes
      GenSeqLike

83. #### def indexOf [B >: A] (elem: B): Int

    Finds index of first occurrence of some value in this stream.

    Finds index of first occurrence of some value in this stream.

    Note: may not terminate for infinite-sized collections.

    B

      the type of the element `elem`.

    elem

      the element value to search for.

    returns

      the index of the first element of this stream that is equal (wrt `==`) to `elem`, or `-1`, if none exists.

    Definition Classes
      GenSeqLike

84. #### def indexOfSlice [B >: A] (that: Seq[B], from: Int): Int

    Definition Classes
      SeqLike
    Annotations
      @bridge()

85. #### def indexOfSlice [B >: A] (that: GenSeq[B], from: Int): Int

    Finds first index after or at a start index where this stream contains a given sequence as a slice.

    Finds first index after or at a start index where this stream contains a given sequence as a slice.

    Note: may not terminate for infinite-sized collections.

    that

      the sequence to test

    from

      the start index

    returns

      the first index `>= from` such that the elements of this stream starting at this index match the elements of sequence `that`, or `-1` of no such subsequence exists.

    Definition Classes
      SeqLike

86. #### def indexOfSlice [B >: A] (that: Seq[B]): Int

    Definition Classes
      SeqLike
    Annotations
      @bridge()

87. #### def indexOfSlice [B >: A] (that: GenSeq[B]): Int

    Finds first index where this stream contains a given sequence as a slice.

    Finds first index where this stream contains a given sequence as a slice.

    Note: may not terminate for infinite-sized collections.

    that

      the sequence to test

    returns

      the first index such that the elements of this stream starting at this index match the elements of sequence `that`, or `-1` of no such subsequence exists.

    Definition Classes
      SeqLike

88. #### def indexWhere (p: (A) ⇒ Boolean, from: Int): Int

    Finds index of the first element satisfying some predicate after or at some start index.

    Finds index of the first element satisfying some predicate after or at some start index.

    Note: may not terminate for infinite-sized collections.

    p

      the predicate used to test elements.

    from

      the start index

    returns

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

    Definition Classes
      LinearSeqOptimized → SeqLike → GenSeqLike

89. #### def indexWhere (p: (A) ⇒ 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 stream that satisfies the predicate `p`, or `-1`, if none exists.

    Definition Classes
      GenSeqLike

90. #### def indices : Range

    Produces the range of all indices of this sequence.

    Produces the range of all indices of this sequence.

    returns

      a `Range` value from `0` to one less than the length of this stream.

    Definition Classes
      SeqLike

91. #### def init : Stream[A]

    The stream without its last element.

    The stream without its last element.

    returns

      a stream consisting of all elements of this stream except the last one.

    Definition Classes
      Stream → TraversableLike

92. #### def inits : Iterator[Stream[A]]

    Iterates over the inits of this stream.

    Iterates over the inits of this stream. The first value will be this stream and the final one will be an empty stream, with the intervening values the results of successive applications of `init`.

    returns

      an iterator over all the inits of this stream

    Definition Classes
      TraversableLike
    Example:

    1. `List(1,2,3).inits = Iterator(List(1,2,3), List(1,2), List(1), Nil)`

93. #### def intersect [B >: A] (that: Seq[B]): Stream[A]

    Definition Classes
      SeqLike
    Annotations
      @bridge()

94. #### def intersect (that: Seq[A]): Stream[A]

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

    [use case]

    Computes the multiset intersection between this stream and another sequence.

    Note: may not terminate for infinite-sized collections.

    that

      the sequence of elements to intersect with.

    returns

      a new collection of type `That` which contains all elements of this stream 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.

    Attributes
      abstract
    Definition Classes
      SeqLike

95. #### def intersect [B >: A] (that: GenSeq[B]): Stream[A]

    Computes the multiset intersection between this stream and another sequence.

    Computes the multiset intersection between this stream and another sequence.

    Note: may not terminate for infinite-sized collections.

    B

      the element type of the returned stream.

    that

      the sequence of elements to intersect with.

    returns

      a new collection of type `That` which contains all elements of this stream 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
      SeqLike → GenSeqLike

96. #### def isDefinedAt (x: Int): Boolean

    Tests whether this stream contains given index.

    Tests whether this stream contains given index.

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

    returns

      `true` if this stream contains an element at position `idx`, `false` otherwise.

    Definition Classes
      LinearSeqOptimized → GenSeqLike

97. #### def isEmpty : Boolean

    Tests whether the stream is empty.

    Tests whether the stream is empty.

    returns

      `true` if the stream contains no elements, `false` otherwise.

    Definition Classes
      IterableLike → GenIterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

98. #### 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.

    Attributes
      final
    Definition Classes
      Any

99. #### def isTraversableAgain : Boolean

    Tests whether this stream can be repeatedly traversed.

    Tests whether this stream can be repeatedly traversed.

    returns

      `true`

    Attributes
      final
    Definition Classes
      GenTraversableLike → GenTraversableOnce

100. #### def iterator : Iterator[A]

     A lazier Iterator than LinearSeqLike's.

     A lazier Iterator than LinearSeqLike's.

     returns

       the new iterator

     Definition Classes
       Stream → LinearSeqLike → IterableLike → GenIterableLike

101. #### def last : A

     Selects the last element.

     Selects the last element.

     returns

       The last element of this stream.

     Definition Classes
       LinearSeqOptimized → TraversableLike

102. #### def lastIndexOf (elem: A, end: Int): Int

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

     [use case]

     Finds index of last occurrence of some value in this stream 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 stream that is equal (wrt `==`) to `elem`, or `-1`, if none exists.

     Attributes
       abstract
     Definition Classes
       GenSeqLike

103. #### def lastIndexOf [B >: A] (elem: B, end: Int): Int

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

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

     B

       the type of the element `elem`.

     elem

       the element value to search for.

     end

       the end index.

     returns

       the index `<= end` of the last element of this stream that is equal (wrt `==`) to `elem`, or `-1`, if none exists.

     Definition Classes
       GenSeqLike

104. #### def lastIndexOf (elem: A): Int

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

     [use case]

     Finds index of last occurrence of some value in this stream.

     elem

       the element value to search for.

     returns

       the index of the last element of this stream that is equal (wrt `==`) to `elem`, or `-1`, if none exists.

     Attributes
       abstract
     Definition Classes
       GenSeqLike

105. #### def lastIndexOf [B >: A] (elem: B): Int

     Finds index of last occurrence of some value in this stream.

     Finds index of last occurrence of some value in this stream.

     Note: will not terminate for infinite-sized collections.

     B

       the type of the element `elem`.

     elem

       the element value to search for.

     returns

       the index of the last element of this stream that is equal (wrt `==`) to `elem`, or `-1`, if none exists.

     Definition Classes
       GenSeqLike

106. #### def lastIndexOfSlice [B >: A] (that: Seq[B], end: Int): Int

     Definition Classes
       SeqLike
     Annotations
       @bridge()

107. #### def lastIndexOfSlice [B >: A] (that: GenSeq[B], end: Int): Int

     Finds last index before or at a given end index where this stream contains a given sequence as a slice.

     Finds last index before or at a given end index where this stream contains a given sequence as a slice.

     that

       the sequence to test

     end

       the end index

     returns

       the last index `<= end` such that the elements of this stream starting at this index match the elements of sequence `that`, or `-1` of no such subsequence exists.

     Definition Classes
       SeqLike

108. #### def lastIndexOfSlice [B >: A] (that: Seq[B]): Int

     Definition Classes
       SeqLike
     Annotations
       @bridge()

109. #### def lastIndexOfSlice [B >: A] (that: GenSeq[B]): Int

     Finds last index where this stream contains a given sequence as a slice.

     Finds last index where this stream contains a given sequence as a slice.

     Note: will not terminate for infinite-sized collections.

     that

       the sequence to test

     returns

       the last index such that the elements of this stream starting a this index match the elements of sequence `that`, or `-1` of no such subsequence exists.

     Definition Classes
       SeqLike

110. #### def lastIndexWhere (p: (A) ⇒ Boolean, end: Int): Int

     Finds index of last element satisfying some predicate before or at given end index.

     Finds index of last element satisfying some predicate before or at given end index.

     p

       the predicate used to test elements.

     returns

       the index `<= end` of the last element of this stream that satisfies the predicate `p`, or `-1`, if none exists.

     Definition Classes
       LinearSeqOptimized → SeqLike → GenSeqLike

111. #### def lastIndexWhere (p: (A) ⇒ 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 stream that satisfies the predicate `p`, or `-1`, if none exists.

     Definition Classes
       GenSeqLike

112. #### def lastOption : Option[A]

     Optionally selects the last element.

     Optionally selects the last element.

     returns

       the last element of this stream$ if it is nonempty, `None` if it is empty.

     Definition Classes
       TraversableLike

113. #### def length : Int

     The length of the stream.

     The length of the stream.

     Note: will not terminate for infinite-sized collections.

     Note: the execution of `length` may take time proportial to the length of the sequence.

     returns

       the number of elements in this stream.

     Definition Classes
       Stream → LinearSeqOptimized → SeqLike → GenSeqLike

114. #### def lengthCompare (len: Int): Int

     Compares the length of this stream to a test value.

     Compares the length of this stream to a test value.

     len

       the test value that gets compared with the length.

     returns

       A value `x` where

                  x <  0       if this.length <  len
                  x == 0       if this.length == len
                  x >  0       if this.length >  len

       The method as implemented here does not call `length` directly; its running time is `O(length min len)` instead of `O(length)`. The method should be overwritten if computing `length` is cheap.

     Definition Classes
       LinearSeqOptimized → SeqLike

115. #### def lift : (Int) ⇒ Option[A]

     Turns this partial function into an plain function returning an `Option` result.

     Turns this partial function into an plain function returning an `Option` result.

     returns

       a function that takes an argument `x` to `Some(this(x))` if `this` is defined for `x`, and to `None` otherwise.

     Definition Classes
       PartialFunction
     See also

       Function.unlift

116. #### def map [B, That] (f: (A) ⇒ B)(implicit bf: CanBuildFrom[Stream[A], B, That]): That

     Returns the stream resulting from applying the given function `f` to each element of this stream.

     Returns the stream resulting from applying the given function `f` to each element of this stream.

     B

       the element type of the returned collection.

     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.

     f

       function to apply to each 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

       `f(a0), ..., f(an)` if this sequence is `a0, ..., an`.

     Attributes
       final
     Definition Classes
       Stream → TraversableLike → GenTraversableLike → FilterMonadic

117. #### def max : A

     [use case] Finds the largest element.

     [use case]

     Finds the largest element.

     returns

       the largest element of this stream with respect to the ordering `cmp`.

     Attributes
       abstract
     Definition Classes
       GenTraversableOnce

118. #### def max [B >: A] (implicit cmp: Ordering[B]): A

     Finds the largest element.

     Finds the largest element.

     B

       The type over which the ordering is defined.

     cmp

       An ordering to be used for comparing elements.

     returns

       the largest element of this stream with respect to the ordering `cmp`.

     Definition Classes
       TraversableOnce → GenTraversableOnce

119. #### def maxBy [B] (f: (A) ⇒ B)(implicit cmp: Ordering[B]): A

     Definition Classes
       TraversableOnce → GenTraversableOnce

120. #### def min : A

     [use case] Finds the smallest element.

     [use case]

     Finds the smallest element.

     returns

       the smallest element of this stream with respect to the ordering `cmp`.

     Attributes
       abstract
     Definition Classes
       GenTraversableOnce

121. #### def min [B >: A] (implicit cmp: Ordering[B]): A

     Finds the smallest element.

     Finds the smallest element.

     B

       The type over which the ordering is defined.

     cmp

       An ordering to be used for comparing elements.

     returns

       the smallest element of this stream with respect to the ordering `cmp`.

     Definition Classes
       TraversableOnce → GenTraversableOnce

122. #### def minBy [B] (f: (A) ⇒ B)(implicit cmp: Ordering[B]): A

     Definition Classes
       TraversableOnce → GenTraversableOnce

123. #### def mkString (start: String, sep: String, end: String): String

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

     Displays all elements of this stream 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 stream. 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 stream are separated by the string `sep`.

     Definition Classes
       Stream → TraversableOnce → GenTraversableOnce
     Example:

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

124. #### def mkString : String

     Displays all elements of this stream in a string.

     Displays all elements of this stream in a string.

     returns

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

     Definition Classes
       Stream → TraversableOnce → GenTraversableOnce

125. #### def mkString (sep: String): String

     Displays all elements of this stream in a string using a separator string.

     Displays all elements of this stream in a string using a separator string.

     sep

       the separator string.

     returns

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

     Definition Classes
       Stream → TraversableOnce → GenTraversableOnce
     Example:

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

126. #### 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.

     Attributes
       final
     Definition Classes
       AnyRef

127. #### def newBuilder : Builder[A, Stream[A]]

     The builder that builds instances of type Stream[A]

     The builder that builds instances of type Stream[A]

     Attributes
       protected[this]
     Definition Classes
       GenericTraversableTemplate → HasNewBuilder

128. #### def nonEmpty : Boolean

     Tests whether the stream is not empty.

     Tests whether the stream is not empty.

     returns

       `true` if the stream contains at least one element, `false` otherwise.

     Definition Classes
       TraversableOnce → GenTraversableOnce

129. #### 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.

     Attributes
       final
     Definition Classes
       AnyRef

130. #### 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.

     Attributes
       final
     Definition Classes
       AnyRef

131. #### def orElse [A1 <: Int, B1 >: A] (that: PartialFunction[A1, B1]): PartialFunction[A1, B1]

     Composes this partial function with a fallback partial function which gets applied where this partial function is not defined.

     Composes this partial function with a fallback partial function which gets applied where this partial function is not defined.

     A1

       the argument type of the fallback function

     B1

       the result type of the fallback function

     that

       the fallback function

     returns

       a partial function which has as domain the union of the domains of this partial function and `that`. The resulting partial function takes `x` to `this(x)` where `this` is defined, and to `that(x)` where it is not.

     Definition Classes
       PartialFunction

132. #### def padTo [B >: A, That] (len: Int, elem: B)(implicit bf: CanBuildFrom[Stream[A], B, That]): That

     Returns a new sequence of given length containing the elements of this sequence followed by zero or more occurrences of given elements.

     Returns a new sequence of given length containing the elements of this sequence followed by zero or more occurrences of given elements.

     B

       the element type of the returned stream.

     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.

     len

       the target length

     elem

       the padding value

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

     Definition Classes
       Stream → SeqLike → GenSeqLike

133. #### def par : ParSeq[A]

     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
       Parallelizable

134. #### def parCombiner : Combiner[A, ParSeq[A]]

     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
       Seq → SeqLike → Iterable → TraversableLike → Parallelizable

135. #### def partition (p: (A) ⇒ Boolean): (Stream[A], Stream[A])

     Returns all the elements of this stream that satisfy the predicate `p`.

     Returns all the elements of this stream that satisfy the predicate `p`. The order of the elements is preserved.

     p

       the predicate used to filter the stream.

     returns

       the elements of this stream satisfying `p`.

     Definition Classes
       Stream → TraversableLike → GenTraversableLike

136. #### def patch [B >: A, That] (from: Int, patch: Seq[B], replaced: Int)(implicit bf: CanBuildFrom[Stream[A], B, That]): That

     Definition Classes
       SeqLike
     Annotations
       @bridge()

137. #### def patch (from: Int, that: GenSeq[A], replaced: Int): Stream[A]

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

     [use case]

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

     from

       the index of the first replaced element

     replaced

       the number of elements to drop in the original stream

     returns

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

     Attributes
       abstract
     Definition Classes
       GenSeqLike

138. #### def patch [B >: A, That] (from: Int, patch: GenSeq[B], replaced: Int)(implicit bf: CanBuildFrom[Stream[A], B, That]): That

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

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

     B

       the element type of the returned stream.

     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.

     from

       the index of the first replaced element

     patch

       the replacement sequence

     replaced

       the number of elements to drop in the original stream

     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 stream consisting of all elements of this stream except that `replaced` elements starting from `from` are replaced by `patch`.

     Definition Classes
       SeqLike → GenSeqLike

139. #### def permutations : Iterator[Stream[A]]

     Iterates over distinct permutations.

     Iterates over distinct permutations.

     returns

       An Iterator which traverses the distinct permutations of this stream.

     Definition Classes
       SeqLike
     Example:

     1. `"abb".permutations = Iterator(abb, bab, bba)`

140. #### def prefixLength (p: (A) ⇒ 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 stream such that every element of the segment satisfies the predicate `p`.

     Definition Classes
       GenSeqLike

141. #### def print (sep: String): Unit

     Prints elements of this stream one by one, separated by `sep`.

     Prints elements of this stream one by one, separated by `sep`.

     sep

       The separator string printed between consecutive elements.

142. #### def print (): Unit

     Prints elements of this stream one by one, separated by commas.

143. #### 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 of this stream with respect to the `*` operator in `num`.

     Attributes
       abstract
     Definition Classes
       GenTraversableOnce

144. #### def product [B >: A] (implicit num: Numeric[B]): B

     Multiplies up the elements of this collection.

     Multiplies up the elements of this collection.

     B

       the result type of the `*` operator.

     num

       an implicit parameter defining a set of numeric operations which includes the `*` operator to be used in forming the product.

     returns

       the product of all elements of this stream with respect to the `*` operator in `num`.

     Definition Classes
       TraversableOnce → GenTraversableOnce

145. #### def reduce [A1 >: A] (op: (A1, A1) ⇒ A1): A1

     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`.

     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
       TraversableOnce → GenTraversableOnce

146. #### def reduceLeft [B >: A] (f: (B, A) ⇒ B): B

     Stream specialization of reduceLeft which allows GC to collect along the way.

     Stream specialization of reduceLeft which allows GC to collect along the way.

     Attributes
       final
     Definition Classes
       Stream → LinearSeqOptimized → TraversableOnce

147. #### def reduceLeftOption [B >: A] (op: (B, A) ⇒ B): Option[B]

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

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

     Note: will not terminate for infinite-sized collections.

     B

       the result type of the binary operator.

     op

       the binary operator.

     returns

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

148. #### def reduceOption [A1 >: A] (op: (A1, A1) ⇒ A1): Option[A1]

     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`.

     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
       TraversableOnce → GenTraversableOnce

149. #### def reduceRight [B >: A] (op: (A, B) ⇒ B): B

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

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

     Note: will not terminate for infinite-sized collections.

     B

       the result type of the binary operator.

     op

       the binary operator.

     returns

       the result of inserting `op` between consecutive elements of this stream, going right to left:

                       op(x,,1,,, op(x,,2,,, ..., op(x,,n-1,,, x,,n,,)...))

       where `x,,1,,, ..., x,,n,,` are the elements of this stream.

     Definition Classes
       LinearSeqOptimized → IterableLike → TraversableOnce → GenTraversableOnce

150. #### def reduceRightOption [B >: A] (op: (A, B) ⇒ B): Option[B]

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

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

     Note: will not terminate for infinite-sized collections.

     B

       the result type of the binary operator.

     op

       the binary operator.

     returns

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

151. #### def repr : Stream[A]

     The collection of type stream underlying this `TraversableLike` object.

     The collection of type stream underlying this `TraversableLike` object. By default this is implemented as the `TraversableLike` object itself, but this can be overridden.

     Definition Classes
       TraversableLike → GenTraversableLike

152. #### def reverse : Stream[A]

     A list consisting of all elements of this list in reverse order.

     A list consisting of all elements of this list in reverse order.

     returns

       A new stream with all elements of this stream in reversed order.

     Definition Classes
       Stream → SeqLike → GenSeqLike

153. #### def reverseIterator : Iterator[A]

     An iterator yielding elements in reversed order.

     An iterator yielding elements in reversed order.

     Note: will not terminate for infinite-sized collections.

     Note: `xs.reverseIterator` is the same as `xs.reverse.iterator` but might be more efficient.

     returns

       an iterator yielding the elements of this stream in reversed order

     Definition Classes
       SeqLike

154. #### def reverseMap [B] (f: (A) ⇒ B): Stream[B]

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

     [use case]

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

     B

       the element type of the returned collection.

     f

       the function to apply to each element.

     returns

       a new collection of type `That` resulting from applying the given function `f` to each element of this stream and collecting the results in reversed order.

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

     Attributes
       abstract
     Definition Classes
       GenSeqLike

155. #### def reverseMap [B, That] (f: (A) ⇒ B)(implicit bf: CanBuildFrom[Stream[A], B, That]): That

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

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

     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.

     f

       the function to apply to each 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

       a new collection of type `That` resulting from applying the given function `f` to each element of this stream and collecting the results in reversed order.

     Definition Classes
       SeqLike → GenSeqLike

156. #### def reversed : List[A]

     Attributes
       protected[this]
     Definition Classes
       TraversableOnce

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

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

     [use case]

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

     that

       the collection to compare with.

     returns

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

     Attributes
       abstract
     Definition Classes
       GenIterableLike

158. #### def sameElements [B >: A] (that: GenIterable[B]): Boolean

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

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

     Note: will not terminate for infinite-sized collections.

     B

       the type of the elements of collection `that`.

     that

       the collection to compare with.

     returns

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

     Definition Classes
       LinearSeqOptimized → IterableLike → GenIterableLike

159. #### def sameElements [B >: A] (that: Iterable[B]): Boolean

     Definition Classes
       IterableLike
     Annotations
       @bridge()

160. #### def scan [B >: A, That] (z: B)(op: (B, B) ⇒ B)(implicit cbf: CanBuildFrom[Stream[A], B, That]): That

     Computes a prefix scan of the elements of the collection.

     Computes a prefix scan of the elements of the collection.

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

     B

       element type of the resulting collection

     That

       type of the resulting collection

     z

       neutral element for the operator `op`

     op

       the associative operator for the scan

     cbf

       combiner factory which provides a combiner

     returns

       a new stream containing the prefix scan of the elements in this stream

     Definition Classes
       TraversableLike → GenTraversableLike

161. #### def scanLeft [B, That] (z: B)(op: (B, A) ⇒ B)(implicit bf: CanBuildFrom[Stream[A], B, That]): That

     Create a new stream which contains all intermediate results of applying the operator to subsequent elements left to right.

     Create a new stream which contains all intermediate results of applying the operator to subsequent elements left to right.

     B

       the type of the elements in the resulting collection

     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

     Attributes
       final
     Definition Classes
       Stream → TraversableLike → GenTraversableLike

162. #### def scanRight [B, That] (z: B)(op: (A, B) ⇒ B)(implicit bf: CanBuildFrom[Stream[A], B, That]): That

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

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

     Note: will not terminate for infinite-sized collections.

     Example:

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

     B

       the type of the elements in the resulting collection

     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
       TraversableLike → GenTraversableLike
     Annotations
       @migration
     Migration

       "This scanRight definition has changed in 2.9.\n" + "The previous behavior can be reproduced with scanRight.reverse."

163. #### def segmentLength (p: (A) ⇒ Boolean, from: Int): Int

     Computes length of longest segment whose elements all satisfy some predicate.

     Computes length of longest segment whose elements all satisfy some predicate.

     Note: may not terminate for infinite-sized collections.

     p

       the predicate used to test elements.

     from

       the index where the search starts.

     returns

       the length of the longest segment of this stream starting from index `from` such that every element of the segment satisfies the predicate `p`.

     Definition Classes
       LinearSeqOptimized → SeqLike → GenSeqLike

164. #### def seq : Seq[A]

     A version of this collection with all of the operations implemented sequentially (i.

     A version of this collection with all of the operations implemented sequentially (i.e. in a single-threaded manner).

     This method returns a reference to this collection. In parallel collections, it is redefined to return a sequential implementation of this collection. In both cases, it has O(1) complexity.

     returns

       a sequential view of the collection.

     Definition Classes
       Seq → Seq → GenSeq → Iterable → Iterable → GenIterable → Traversable → Traversable → GenTraversable → Parallelizable → TraversableOnce → GenTraversableOnce

165. #### def size : Int

     The size of this stream, equivalent to `length`.

     The size of this stream, equivalent to `length`.

     Note: will not terminate for infinite-sized collections.

     returns

       the number of elements in this stream.

     Definition Classes
       SeqLike → GenTraversableLike → TraversableOnce → GenTraversableOnce

166. #### def slice (from: Int, until: Int): Stream[A]

     A substream starting at index `from` and extending up to (but not including) index `until`.

     A substream starting at index `from` and extending up to (but not including) index `until`.

     from

       the lowest index to include from this stream.

     until

       the highest index to EXCLUDE from this stream.

     returns

       a stream containing the elements greater than or equal to index `from` extending up to (but not including) index `until` of this stream.@param start The index of the first element of the returned subsequence

     Definition Classes
       Stream → LinearSeqOptimized → IterableLike → TraversableLike → GenTraversableLike

167. #### def sliding [B >: A] (size: Int, step: Int): Iterator[Stream[A]]

     Definition Classes
       IterableLike

168. #### def sliding [B >: A] (size: Int): Iterator[Stream[A]]

     Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.

     Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)

     size

       the number of elements per group

     returns

       An iterator producing streams of size `size`, except the last and the only element will be truncated if there are fewer elements than size.

     Definition Classes
       IterableLike
     See also

       Iterator#sliding

169. #### def sortBy [B] (f: (A) ⇒ B)(implicit ord: Ordering[B]): Stream[A]

     Sorts this Stream according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.

     Sorts this Stream according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.

     B

       the target type of the transformation `f`, and the type where the ordering `ord` is defined.

     f

       the transformation function mapping elements to some other domain `B`.

     ord

       the ordering assumed on domain `B`.

     returns

       a stream consisting of the elements of this stream sorted according to the ordering where `x < y` if `ord.lt(f(x), f(y))`.

     Definition Classes
       SeqLike
     Example:

     1.        val words = "The quick brown fox jumped over the lazy dog".split(' ')
               // this works because scala.Ordering will implicitly provide an Ordering[Tuple2[Int, Char]]
               words.sortBy(x => (x.length, x.head))
               res0: Array[String] = Array(The, dog, fox, the, lazy, over, brown, quick, jumped)

     See also

       scala.math.Ordering

       Note: will not terminate for infinite-sized collections.

170. #### def sortWith (lt: (A, A) ⇒ Boolean): Stream[A]

     Sorts this stream according to a comparison function.

     Sorts this stream according to a comparison function.

     Note: will not terminate for infinite-sized collections.

     The sort is stable. That is, elements that are equal wrt `lt` appear in the same order in the sorted sequence as in the original.

     lt

       the comparison function which tests whether its first argument precedes its second argument in the desired ordering.

     returns

       a stream consisting of the elements of this stream sorted according to the comparison function `lt`.

     Definition Classes
       SeqLike
     Example:

     1.        List("Steve", "Tom", "John", "Bob").sortWith(_.compareTo(_) < 0) =
               List("Bob", "John", "Steve", "Tom")

171. #### def sorted [B >: A] (implicit ord: Ordering[B]): Stream[A]

     Sorts this stream according to an Ordering.

     Sorts this stream according to an Ordering.

     The sort is stable. That is, elements that are equal wrt `lt` appear in the same order in the sorted sequence as in the original.

     ord

       the ordering to be used to compare elements.

     returns

       a stream consisting of the elements of this stream sorted according to the ordering `ord`.

     Definition Classes
       SeqLike
     See also

       scala.math.Ordering

172. #### def span (p: (A) ⇒ Boolean): (Stream[A], Stream[A])

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

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

     Note: `c span p` is equivalent to (but possibly more efficient than) `(c takeWhile p, c dropWhile p)`, provided the evaluation of the predicate `p` does not cause any side-effects.

     p

       the test predicate

     returns

       a pair consisting of the longest prefix of this stream whose elements all satisfy `p`, and the rest of this stream.

     Definition Classes
       LinearSeqOptimized → TraversableLike → GenTraversableLike

173. #### def splitAt (n: Int): (Stream[A], Stream[A])

     Splits this stream into two at a given position.

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

     n

       the position at which to split.

     returns

       a pair of streams consisting of the first `n` elements of this stream, and the other elements.

     Definition Classes
       Stream → TraversableLike → GenTraversableLike

174. #### def startsWith [B] (that: Seq[B], offset: Int): Boolean

     Definition Classes
       SeqLike
     Annotations
       @bridge()

175. #### def startsWith [B] (that: GenSeq[B], offset: Int): Boolean

     Tests whether this stream contains the given sequence at a given index.

     Tests whether this stream contains the given sequence at a given index.

     If the both the receiver object, `this` and the argument, `that` are infinite sequences this method may not terminate.

     that

       the sequence to test

     offset

       the index where the sequence is searched.

     returns

       `true` if the sequence `that` is contained in this stream at index `offset`, otherwise `false`.

     Definition Classes
       SeqLike → GenSeqLike

176. #### def startsWith [B] (that: Seq[B]): Boolean

     Definition Classes
       GenSeqLike
     Annotations
       @bridge()

177. #### def startsWith [B] (that: GenSeq[B]): Boolean

     Tests whether this stream starts with the given sequence.

     Tests whether this stream 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

178. #### def stringPrefix : String

     Defines the prefix of this object's `toString` representation as ``Stream.

     Defines the prefix of this object's `toString` representation as ``Stream.

     returns

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

     Definition Classes
       Stream → TraversableLike → GenTraversableLike

179. #### 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 of this stream with respect to the `+` operator in `num`.

     Attributes
       abstract
     Definition Classes
       GenTraversableOnce

180. #### def sum [B >: A] (implicit num: Numeric[B]): B

     Sums up the elements of this collection.

     Sums up the elements of this collection.

     B

       the result type of the `+` operator.

     num

       an implicit parameter defining a set of numeric operations which includes the `+` operator to be used in forming the sum.

     returns

       the sum of all elements of this stream with respect to the `+` operator in `num`.

     Definition Classes
       TraversableOnce → GenTraversableOnce

181. #### def synchronized [T0] (arg0: ⇒ T0): T0

     Attributes
       final
     Definition Classes
       AnyRef

182. #### def tail : Stream[A]

     Selects all elements except the first.

     Selects all elements except the first.

     returns

       a stream consisting of all elements of this stream except the first one.

     Definition Classes
       TraversableLike → GenTraversableLike

183. #### def tails : Iterator[Stream[A]]

     Iterates over the tails of this stream.

     Iterates over the tails of this stream. The first value will be this stream and the final one will be an empty stream, with the intervening values the results of successive applications of `tail`.

     returns

       an iterator over all the tails of this stream

     Definition Classes
       TraversableLike
     Example:

     1. `List(1,2,3).tails = Iterator(List(1,2,3), List(2,3), List(3), Nil)`

184. #### def take (n: Int): Stream[A]

     Returns the `n` first elements of this stream, or else the whole stream, if it has less than `n` elements.

     Returns the `n` first elements of this stream, or else the whole stream, if it has less than `n` elements.

     n

       the number of elements to take.

     returns

       the `n` first elements of this stream.

     Definition Classes
       Stream → LinearSeqOptimized → IterableLike → TraversableLike → GenTraversableLike

185. #### def takeRight (n: Int): Stream[A]

     Returns the rightmost `n` elements from this iterable.

     Returns the rightmost `n` elements from this iterable.

     n

       the number of elements to take

     returns

       a stream consisting only of the last `n` elements of this stream, or else the whole stream, if it has less than `n` elements.

     Definition Classes
       Stream → IterableLike

186. #### def takeWhile (p: (A) ⇒ Boolean): Stream[A]

     Returns the longest prefix of this stream whose elements satisfy the predicate `p`.

     Returns the longest prefix of this stream whose elements satisfy the predicate `p`.

     p

       the test predicate.

     returns

       the longest prefix of this stream whose elements all satisfy the predicate `p`.

     Definition Classes
       Stream → LinearSeqOptimized → IterableLike → TraversableLike → GenTraversableLike

187. #### def thisCollection : LinearSeq[A]

     The underlying collection seen as an instance of `Stream`.

     The underlying collection seen as an instance of `Stream`. By default this is implemented as the current collection object itself, but this can be overridden.

     Attributes
       protected[this]
     Definition Classes
       LinearSeqLike → SeqLike → IterableLike → TraversableLike

188. #### def toArray : Array[A]

     [use case] Converts this stream to an array.

     [use case]

     Converts this stream to an array.

     Note: will not terminate for infinite-sized collections.

     returns

       an array containing all elements of this stream.

     Attributes
       abstract
     Definition Classes
       GenTraversableOnce

189. #### def toArray [B >: A] (implicit arg0: ClassManifest[B]): Array[B]

     Converts this stream to an array.

     Converts this stream to an array.

     Note: will not terminate for infinite-sized collections.

     B

       the type of the elements of the array. A `ClassManifest` for this type must be available.

     returns

       an array containing all elements of this stream.

     Definition Classes
       TraversableOnce → GenTraversableOnce

190. #### def toBuffer [B >: A] : Buffer[B]

     Converts this stream to a mutable buffer.

     Converts this stream to a mutable buffer.

     Note: will not terminate for infinite-sized collections.

     returns

       a buffer containing all elements of this stream.

     Definition Classes
       TraversableOnce → GenTraversableOnce

191. #### def toCollection (repr: Stream[A]): LinearSeq[A]

     A conversion from collections of type `Repr` to `Stream` objects.

     A conversion from collections of type `Repr` to `Stream` objects. By default this is implemented as just a cast, but this can be overridden.

     Attributes
       protected[this]
     Definition Classes
       LinearSeqLike → SeqLike → IterableLike → TraversableLike

192. #### def toIndexedSeq [B >: A] : IndexedSeq[B]

     Converts this stream to an indexed sequence.

     Converts this stream to an indexed sequence.

     Note: will not terminate for infinite-sized collections.

     returns

       an indexed sequence containing all elements of this stream.

     Definition Classes
       TraversableOnce → GenTraversableOnce

193. #### def toIterable : Iterable[A]

     Converts this stream to an iterable collection.

     Converts this stream 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 stream.

     Definition Classes
       IterableLike → TraversableOnce → GenTraversableOnce

194. #### def toIterator : Iterator[A]

     Returns an Iterator over the elements in this stream.

     Returns an Iterator over the elements in this stream. 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 stream.

     Definition Classes
       TraversableLike → GenTraversableOnce

195. #### def toList : List[A]

     Converts this stream to a list.

     Converts this stream to a list.

     Note: will not terminate for infinite-sized collections.

     returns

       a list containing all elements of this stream.

     Definition Classes
       TraversableOnce → GenTraversableOnce

196. #### def toMap [T, U] : Map[T, U]

     [use case] Converts this stream to a map.

     [use case]

     Converts this stream 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 containing all elements of this stream.

     Attributes
       abstract
     Definition Classes
       GenTraversableOnce

197. #### def toMap [T, U] (implicit ev: <:<[A, (T, U)]): Map[T, U]

     Converts this stream to a map.

     Converts this stream 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 containing all elements of this stream.

     Definition Classes
       TraversableOnce → GenTraversableOnce

198. #### def toSeq : Seq[A]

     Converts this stream to a sequence.

     Converts this stream to a sequence.

     Note: will not terminate for infinite-sized collections.

     Overridden for efficiency.

     returns

       a sequence containing all elements of this stream.

     Definition Classes
       Seq → SeqLike → GenSeqLike → TraversableOnce → GenTraversableOnce

199. #### def toSet [B >: A] : Set[B]

     Converts this stream to a set.

     Converts this stream to a set.

     Note: will not terminate for infinite-sized collections.

     returns

       a set containing all elements of this stream.

     Definition Classes
       TraversableOnce → GenTraversableOnce

200. #### def toStream : Stream[A]

     Converts this stream to a stream.

     Converts this stream to a stream.

     Note: will not terminate for infinite-sized collections.

     returns

       a stream containing all elements of this stream.

     Definition Classes
       Stream → IterableLike → TraversableLike → GenTraversableOnce

201. #### def toString (): String

     Converts this stream to a string.

     Converts this stream to a string.

     returns

       a string representation of this collection. By default this string consists of the `stringPrefix` of this stream, followed by all elements separated by commas and enclosed in parentheses.

     Definition Classes
       Stream → SeqLike → Function1 → TraversableLike → AnyRef → Any

202. #### def toTraversable : Traversable[A]

     Converts this stream to an unspecified Traversable.

     Converts this stream 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 stream.

     Definition Classes
       TraversableLike → TraversableOnce → GenTraversableOnce

203. #### def transpose [B] (implicit asTraversable: (A) ⇒ TraversableOnce[B]): Traversable[Traversable[B]]

     Transposes this stream of traversable collections into a stream of streams.

     Transposes this stream of traversable collections into a stream of streams.

     B

       the type of the elements of each traversable collection.

     asTraversable

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

     returns

       a two-dimensional stream of streams which has as nth row the nth column of this stream.

     Definition Classes
       Traversable → GenericTraversableTemplate
     Annotations
       @bridge()

204. #### def union (that: Seq[A]): Stream[A]

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

     [use case]

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

     Note: will not terminate for infinite-sized collections.

     that

       the sequence to add.

     returns

       a new collection of type `That` which contains all elements of this stream followed by all elements of `that`.

     Attributes
       abstract
     Definition Classes
       SeqLike

205. #### def union [B >: A, That] (that: GenSeq[B])(implicit bf: CanBuildFrom[Stream[A], B, That]): That

     Produces a new sequence which contains all elements of this stream and also all elements of a given sequence.

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

     Note: will not terminate for infinite-sized collections.

     Another way to express this is that `xs union ys` computes the order-presevring 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.

     B

       the element type of the returned stream.

     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 sequence to add.

     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 stream followed by all elements of `that`.

     Definition Classes
       SeqLike → GenSeqLike

206. #### def union [B >: A, That] (that: Seq[B])(implicit bf: CanBuildFrom[Stream[A], B, That]): That

     Definition Classes
       GenSeqLike
     Annotations
       @bridge()

207. #### def unzip [A1, A2] (implicit asPair: (A) ⇒ (A1, A2)): (Stream[A1], Stream[A2])

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

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

     asPair

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

     returns

       a pair streams, containing the first, respectively second half of each element pair of this stream.

     Definition Classes
       GenericTraversableTemplate

208. #### def unzip3 [A1, A2, A3] (implicit asTriple: (A) ⇒ (A1, A2, A3)): (Stream[A1], Stream[A2], Stream[A3])

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

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

     returns

       a triple streams, containing the first, second, respectively third member of each element triple of this stream.

     Definition Classes
       GenericTraversableTemplate

209. #### def updated (index: Int, elem: A): Stream[A]

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

     [use case]

     A copy of this stream with one single replaced element.

     index

       the position of the replacement

     elem

       the replacing element

     returns

       a new stream`which is a copy of this stream with the element at position` index`replaced by` elem`.`

     Attributes
       abstract
     Definition Classes
       GenSeqLike

210. #### def updated [B >: A, That] (index: Int, elem: B)(implicit bf: CanBuildFrom[Stream[A], B, That]): That

     A copy of this stream with one single replaced element.

     A copy of this stream with one single replaced element.

     B

       the element type of the returned stream.

     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.

     index

       the position of the replacement

     elem

       the replacing 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

       a new stream`which is a copy of this stream with the element at position` index`replaced by` elem`.`

     Definition Classes
       SeqLike → GenSeqLike

211. #### def view : StreamView[A, Stream[A]]

     Creates a non-strict view of this stream.

     Creates a non-strict view of this stream.

     returns

       a non-strict view of this stream.

     Definition Classes
       Stream → SeqLike → IterableLike → TraversableLike

212. #### def view (from: Int, until: Int): SeqView[A, Stream[A]]

     Creates a non-strict view of a slice of this stream.

     Creates a non-strict view of a slice of this stream.

     Note: the difference between `view` and `slice` is that `view` produces a view of the current stream, whereas `slice` produces a new stream.

     Note: `view(from, to)` is equivalent to `view.slice(from, to)`

     from

       the index of the first element of the view

     until

       the index of the element following the view

     returns

       a non-strict view of a slice of this stream, starting at index `from` and extending up to (but not including) index `until`.

     Definition Classes
       SeqLike → IterableLike → TraversableLike

213. #### def wait (): Unit

     Attributes
       final
     Definition Classes
       AnyRef
     Annotations
       @throws()

214. #### def wait (arg0: Long, arg1: Int): Unit

     Attributes
       final
     Definition Classes
       AnyRef
     Annotations
       @throws()

215. #### def wait (arg0: Long): Unit

     Attributes
       final
     Definition Classes
       AnyRef
     Annotations
       @throws()

216. #### def withFilter (p: (A) ⇒ Boolean): StreamWithFilter

     Creates a non-strict filter of this stream.

     Creates a non-strict filter of this stream.

     Note: the difference between `c filter p` and `c withFilter p` is that the former creates a new collection, whereas the latter only restricts the domain of subsequent `map`, `flatMap`, `foreach`, and `withFilter` operations.

     p

       the predicate used to test elements.

     returns

       an object of class `WithFilter`, which supports `map`, `flatMap`, `foreach`, and `withFilter` operations. All these operations apply to those elements of this stream which satisfy the predicate `p`.

     Attributes
       final
     Definition Classes
       Stream → TraversableLike → FilterMonadic

217. #### def zip [A1 >: A, B, That] (that: GenIterable[B])(implicit bf: CanBuildFrom[Stream[A], (A1, B), That]): That

     Returns a stream formed from this stream and the specified stream `that` by associating each element of the former with the element at the same position in the latter.

     Returns a stream formed from this stream and the specified stream `that` by associating each element of the former with the element at the same position in the latter. If one of the two streams is longer than the other, its remaining elements are ignored.

     A1

       the type of the first half of the returned pairs (this is always a supertype of the collection's element type `A`).

     B

       the type of the second half of the returned pairs

     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 `(A1, B)` being admissible for that class, which means that an implicit instance of type `CanBuildFrom[Repr, (A1, B), That]`. is found.

     that

       The iterable providing the second half of each result pair

     bf

       an implicit value of class `CanBuildFrom` which determines the result class `That` from the current representation type `Repr` and the new element type `(A1, B)`.

     returns

       `Stream({a0,b0}, ..., {amin(m,n),bmin(m,n))}` when `Stream(a0, ..., am) zip Stream(b0, ..., bn)` is invoked.

     Attributes
       final
     Definition Classes
       Stream → IterableLike → GenIterableLike

218. #### def zip [A1 >: A, B, That] (that: Iterable[B])(implicit bf: CanBuildFrom[Stream[A], (A1, B), That]): That

     Definition Classes
       IterableLike
     Annotations
       @bridge()

219. #### def zipAll [B, A1 >: A, That] (that: Iterable[B], thisElem: A1, thatElem: B)(implicit bf: CanBuildFrom[Stream[A], (A1, B), That]): That

     Definition Classes
       IterableLike
     Annotations
       @bridge()

220. #### def zipAll [B] (that: Iterable[B], thisElem: A, thatElem: B): Stream[(A, B)]

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

     [use case]

     Returns a stream formed from this stream 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.

     that

       the iterable providing the second half of each result pair

     thisElem

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

     thatElem

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

     returns

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

     Attributes
       abstract
     Definition Classes
       GenIterableLike

221. #### def zipAll [B, A1 >: A, That] (that: GenIterable[B], thisElem: A1, thatElem: B)(implicit bf: CanBuildFrom[Stream[A], (A1, B), That]): That

     Returns a stream formed from this stream and another iterable collection by combining corresponding elements in pairs.

     Returns a stream formed from this stream 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.

     that

       the iterable providing the second half of each result pair

     thisElem

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

     thatElem

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

     returns

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

     Definition Classes
       IterableLike → GenIterableLike

222. #### def zipWithIndex [A1 >: A, That] (implicit bf: CanBuildFrom[Stream[A], (A1, Int), That]): That

     Zips this iterable with its indices.

     Zips this iterable with its indices. `s.zipWithIndex` is equivalent to `s zip s.indices`

     A1

       the type of the first half of the returned pairs (this is always a supertype of the collection's element type `A`).

     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 `(A1, Int)` being admissible for that class, which means that an implicit instance of type `CanBuildFrom[Repr, (A1, Int), That]`. is found.

     returns

       A new collection of type `That` containing pairs consisting of all elements of this stream paired with their index. Indices start at `0`.

     Definition Classes
       Stream → IterableLike → GenIterableLike

### Deprecated Value Members

1. #### def elements : Iterator[A]

   Definition Classes
     IterableLike
   Annotations
     @deprecated
   Deprecated

     use `iterator' instead`

2. #### def equalsWith [B] (that: Seq[B])(f: (A, B) ⇒ Boolean): Boolean

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

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

   B

     the type of the elements of `that`

   that

     the other sequence

   returns

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

   Definition Classes
     SeqLike
   Annotations
     @deprecated
   Deprecated

     use `corresponds` instead

3. #### def findIndexOf (p: (A) ⇒ Boolean): Int

   Returns index of the first element satisfying a predicate, or `-1`.

   Returns index of the first element satisfying a predicate, or `-1`.

   Definition Classes
     SeqLike
   Annotations
     @deprecated
   Deprecated

     Use indexWhere(p) instead.

4. #### def findLastIndexOf (p: (A) ⇒ Boolean): Int

   Returns index of the last element satisfying a predicate, or -1.

   Returns index of the last element satisfying a predicate, or -1.

   Definition Classes
     SeqLike
   Annotations
     @deprecated
   Deprecated

     use `lastIndexWhere` instead

5. #### def first : A

   Definition Classes
     IterableLike
   Annotations
     @deprecated
   Deprecated

     use `head' instead`

6. #### def firstOption : Option[A]

   `None` if iterable is empty.

   `None` if iterable is empty.

   Definition Classes
     IterableLike
   Annotations
     @deprecated
   Deprecated

     use `headOption' instead`

7. #### def projection : SeqView[A, Stream[A]]

   returns a projection that can be used to call non-strict `filter`, `map`, and `flatMap` methods that build projections of the collection.

   returns a projection that can be used to call non-strict `filter`, `map`, and `flatMap` methods that build projections of the collection.

   Definition Classes
     SeqLike → IterableLike
   Annotations
     @deprecated
   Deprecated

     use `view' instead`

8. #### def reversedElements : Iterator[A]

   Definition Classes
     SeqLike
   Annotations
     @deprecated
   Deprecated

     use `reverseIterator' instead`

### Inherited from LinearSeqOptimized[A, Stream[A]]

### Inherited from LinearSeq[A]

### Inherited from LinearSeqLike[A, Stream[A]]

### Inherited from Seq[A]

### Inherited from SeqLike[A, Stream[A]]

### Inherited from GenSeq[A]

### Inherited from GenSeqLike[A, Stream[A]]

### Inherited from PartialFunction[Int, A]

### Inherited from (Int) ⇒ A

### Inherited from Iterable[A]

### Inherited from IterableLike[A, Stream[A]]

### Inherited from Equals

### Inherited from GenIterable[A]

### Inherited from GenIterableLike[A, Stream[A]]

### Inherited from Traversable[A]

### Inherited from Immutable

### Inherited from Traversable[A]

### Inherited from GenTraversable[A]

### Inherited from GenericTraversableTemplate[A, Stream]

### Inherited from TraversableLike[A, Stream[A]]

### Inherited from GenTraversableLike[A, Stream[A]]

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

### Inherited from TraversableOnce[A]

### Inherited from GenTraversableOnce[A]

### Inherited from FilterMonadic[A, Stream[A]]

### Inherited from HasNewBuilder[A, Stream[A]]

### Inherited from AnyRef

### Inherited from Any