scala.collection.SeqViewLike

# Mapped

#### trait Mapped[B] extends Mapped[B] with Mapped[B] with Transformed[B]

Definition Classes
  SeqViewLike → GenSeqViewLike → IterableViewLike → GenIterableViewLike → TraversableViewLike → GenTraversableViewLike
Source
  SeqViewLike.scala

Linear Supertypes
Transformed[B], SeqView[B, Coll], SeqViewLike[B, Coll, SeqView[B, Coll]], Seq[B], SeqLike[B, SeqView[B, Coll]], PartialFunction[Int, B], (Int) ⇒ B, Mapped[B], Transformed[B], GenSeqView[B, Coll], GenSeqViewLike[B, Coll, SeqView[B, Coll]], GenSeq[B], GenSeqLike[B, SeqView[B, Coll]], Mapped[B], Transformed[B], IterableView[B, Coll], IterableViewLike[B, Coll, SeqView[B, Coll]], Iterable[B], IterableLike[B, SeqView[B, Coll]], Equals, Mapped[B], Transformed[B], GenIterableView[B, Coll], GenIterableViewLike[B, Coll, SeqView[B, Coll]], GenIterable[B], GenIterableLike[B, SeqView[B, Coll]], Mapped[B], Mapped[B], Transformed[B], Transformed[B], TraversableView[B, Coll], GenTraversableView[B, Coll], TraversableViewLike[B, Coll, SeqView[B, Coll]], GenTraversableViewLike[B, Coll, SeqView[B, Coll]], ViewMkString[B], Traversable[B], GenTraversable[B], GenericTraversableTemplate[B, Seq], TraversableLike[B, SeqView[B, Coll]], GenTraversableLike[B, SeqView[B, Coll]], Parallelizable[B, ParSeq[B]], TraversableOnce[B], GenTraversableOnce[B], FilterMonadic[B, SeqView[B, Coll]], HasNewBuilder[B, SeqView[B, Coll]], AnyRef, Any
Known Subclasses
Mapped
Ordering

1. Alphabetic
2. By inheritance

Inherited

1. Hide All
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1. Mapped
2. Transformed
3. SeqView
4. SeqViewLike
5. Seq
6. SeqLike
7. PartialFunction
8. Function1
9. Mapped
10. Transformed
11. GenSeqView
12. GenSeqViewLike
13. GenSeq
14. GenSeqLike
15. Mapped
16. Transformed
17. IterableView
18. IterableViewLike
19. Iterable
20. IterableLike
21. Equals
22. Mapped
23. Transformed
24. GenIterableView
25. GenIterableViewLike
26. GenIterable
27. GenIterableLike
28. Mapped
29. Mapped
30. Transformed
31. Transformed
32. TraversableView
33. GenTraversableView
34. TraversableViewLike
35. GenTraversableViewLike
36. ViewMkString
37. Traversable
38. GenTraversable
39. GenericTraversableTemplate
40. TraversableLike
41. GenTraversableLike
42. Parallelizable
43. TraversableOnce
44. GenTraversableOnce
45. FilterMonadic
46. HasNewBuilder
47. AnyRef
48. Any

Visibility

1. Public
2. All

### Type Members

1. #### trait Appended[B >: A] extends Appended[B] with Appended[B] with Transformed[B]

   Definition Classes
     SeqViewLike → GenSeqViewLike → IterableViewLike → GenIterableViewLike → TraversableViewLike → GenTraversableViewLike

2. #### trait DroppedWhile extends DroppedWhile with DroppedWhile with Transformed[A]

   Definition Classes
     SeqViewLike → GenSeqViewLike → IterableViewLike → GenIterableViewLike → TraversableViewLike → GenTraversableViewLike

3. #### trait EmptyView extends Transformed[Nothing] with EmptyView with EmptyView

   Definition Classes
     SeqViewLike → GenSeqViewLike → IterableViewLike → GenIterableViewLike → TraversableViewLike → GenTraversableViewLike

4. #### trait Filtered extends Filtered with Filtered with Transformed[A]

   Definition Classes
     SeqViewLike → GenSeqViewLike → IterableViewLike → GenIterableViewLike → TraversableViewLike → GenTraversableViewLike

5. #### trait FlatMapped[B] extends FlatMapped[B] with FlatMapped[B] with Transformed[B]

   Definition Classes
     SeqViewLike → GenSeqViewLike → IterableViewLike → GenIterableViewLike → TraversableViewLike → GenTraversableViewLike

6. #### trait Forced[B] extends Forced[B] with Forced[B] with Transformed[B]

   A fall back which forces everything into a vector and then applies an operation on it.

7. #### trait Mapped[B] extends Mapped[B] with Mapped[B] with Transformed[B]

   Definition Classes
     SeqViewLike → GenSeqViewLike → IterableViewLike → GenIterableViewLike → TraversableViewLike → GenTraversableViewLike

8. #### trait Patched[B >: A] extends Transformed[B] with Patched[B]

   Definition Classes
     SeqViewLike → GenSeqViewLike

9. #### trait Prepended[B >: A] extends Transformed[B] with Prepended[B]

   Definition Classes
     SeqViewLike → GenSeqViewLike

10. #### trait Reversed extends Transformed[A] with Reversed

    Definition Classes
      SeqViewLike → GenSeqViewLike

11. #### type Self = SeqView[B, Coll]

    The type implementing this traversable

    The type implementing this traversable

    Attributes
      protected
    Definition Classes
      TraversableLike

12. #### trait Sliced extends Sliced with Sliced with Transformed[A]

    Definition Classes
      SeqViewLike → GenSeqViewLike → IterableViewLike → GenIterableViewLike → TraversableViewLike → GenTraversableViewLike

13. #### trait TakenWhile extends TakenWhile with TakenWhile with Transformed[A]

    Definition Classes
      SeqViewLike → GenSeqViewLike → IterableViewLike → GenIterableViewLike → TraversableViewLike → GenTraversableViewLike

14. #### trait Transformed[+B] extends SeqView[B, Coll] with Transformed[B] with Transformed[B]

    The implementation base trait of this view.

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

    A class supporting filtered operations.

16. #### trait Zipped[B] extends Zipped[B] with Zipped[B] with Transformed[(A, B)]

    Definition Classes
      SeqViewLike → GenSeqViewLike → IterableViewLike → GenIterableViewLike

17. #### trait ZippedAll[A1 >: A, B] extends ZippedAll[A1, B] with ZippedAll[A1, B] with Transformed[(A1, B)]

    Definition Classes
      SeqViewLike → GenSeqViewLike → IterableViewLike → GenIterableViewLike

### Abstract Value Members

1. #### abstract val mapping: (A) ⇒ B

   Attributes
     protected[this]
   Definition Classes
     Mapped

### Concrete Value Members

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

   Definition Classes
     AnyRef

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

   Test two objects for inequality.

   Test two objects for inequality.

   returns

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

   Definition Classes
     Any

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

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

   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 ==

   Definition Classes
     AnyRef → Any

4. #### abstract def ++[B](that: GenTraversableOnce[B]): Seq[B]

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

   [use case]

   Returns a new sequence containing the elements from the left hand operand followed by the elements from the right hand operand. The element type of the sequence is the most specific superclass encompassing the element types of the two operands (see example).

   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 sequence followed by all elements of `that`.

   Definition Classes
     GenTraversableLike

5. #### def ++[B >: B, That](xs: GenTraversableOnce[B])(implicit bf: CanBuildFrom[SeqView[B, Coll], B, That]): That

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

   Returns a new sequence containing the elements from the left hand operand followed by the elements from the right hand operand. The element type of the sequence is the most specific superclass encompassing the element types of the two operands (see example).

   Example:

           scala> val a = LinkedList(1)
           a: scala.collection.mutable.LinkedList[Int] = LinkedList(1)

           scala> val b = LinkedList(2)
           b: scala.collection.mutable.LinkedList[Int] = LinkedList(2)

           scala> val c = a ++ b
           c: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)

           scala> val d = LinkedList('a')
           d: scala.collection.mutable.LinkedList[Char] = LinkedList(a)

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

   B

     the element type of the returned collection.

   That

     the 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.

   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 sequence followed by all elements of `that`.

   Definition Classes
     TraversableViewLike → TraversableLike → GenTraversableLike

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

   As with `++`, returns a new collection containing the elements from the left operand followed by the elements from the right operand.

   As with `++`, returns a new collection containing the elements from the left operand followed by the elements from the right operand. It differs from `++` in that the right operand determines the type of the resulting collection rather than the left one.

   Example:

           scala> val x = List(1)
           x: List[Int] = List(1)

           scala> val y = LinkedList(2)
           y: scala.collection.mutable.LinkedList[Int] = LinkedList(2)

           scala> val z = x ++: y
           z: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)

   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.

   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 sequence which contains all elements of this sequence followed by all elements of `that`.

   Definition Classes
     TraversableLike

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

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

   [use case]

   Concatenates this sequence 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 sequence followed by all elements of `that`.

   Definition Classes
     TraversableLike

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

   Concatenates this sequence with the elements of a traversable collection.

   Concatenates this sequence 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.

   Example:

           scala> val x = List(1)
           x: List[Int] = List(1)

           scala> val y = LinkedList(2)
           y: scala.collection.mutable.LinkedList[Int] = LinkedList(2)

           scala> val z = x ++: y
           z: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)

   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 sequence followed by all elements of `that`.

   Definition Classes
     TraversableLike

9. #### abstract def +:(elem: B): Seq[B]

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

   [use case]

   A copy of the sequence with an element prepended.

   elem

     the prepended element

   returns

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

   Definition Classes
     GenSeqLike

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

    A copy of the sequence with an element prepended.

    A copy of the sequence with an element prepended.

    Note that :-ending operators are right associative (see example). Also, the original sequence is not modified, so you will want to capture the result.

    Example:

             scala> val x = LinkedList(1)
             x: scala.collection.mutable.LinkedList[Int] = LinkedList(1)

             scala> val y = 2 +: x
             y: scala.collection.mutable.LinkedList[Int] = LinkedList(2, 1)

             scala> println(x)
             LinkedList(1)

    B

      the element type of the returned sequence.

    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 sequence.

    Definition Classes
      SeqViewLike → SeqLike → GenSeqLike

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

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

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

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

    Examples:

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

             scala> val a = LinkedList(1,2,3,4)
             a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)

             scala> val b = (5 /: a)(_+_)
             b: Int = 15

             scala> val c = (5 /: a)((x,y) => x + y)
             c: Int = 15

    Note: will not terminate for infinite-sized collections.

    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 sequence, going left to right with the start value `z` on the left:

                      op(...op(op(z, x1), x2), ..., xn)

      where `x1, ..., xn` are the elements of this sequence.

    Definition Classes
      TraversableOnce → GenTraversableOnce

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

    A syntactic sugar for out of order folding.

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

    Example:

             scala> val a = LinkedList(1,2,3,4)
             a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)

             scala> val b = (a /:\ 5)(_+_)
             b: Int = 15

    Definition Classes
      GenTraversableOnce

13. #### abstract def :+(elem: B): Seq[B]

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

    [use case]

    A copy of this sequence with an element appended.

    elem

      the appended element

    returns

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

    Definition Classes
      GenSeqLike

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

    A copy of this sequence with an element appended.

    A copy of this sequence with an element appended.

    Note: will not terminate for infinite-sized collections.

    B

      the element type of the returned sequence.

    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 sequence followed by `elem`.

    Definition Classes
      SeqViewLike → SeqLike → GenSeqLike

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

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

    Applies a binary operator to all elements of this sequence 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.

    Examples:

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

             scala> val a = LinkedList(1,2,3,4)
             a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)

             scala> val b = (a :\ 5)(_+_)
             b: Int = 15

             scala> val c = (a :\ 5)((x,y) => x + y)
             c: Int = 15

    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 sequence, going right to left with the start value `z` on the right:

                      op(x1, op(x2, ... op(xn, z)...))

      where `x1, ..., xn` are the elements of this sequence.

    Definition Classes
      TraversableOnce → GenTraversableOnce

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

    Definition Classes
      AnyRef

17. #### final 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.

    Definition Classes
      Any

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

    Definition Classes
      ViewMkString

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

    Appends all elements of this sequence to a string builder.

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

    Example:

             scala> val a = LinkedList(1,2,3,4)
             a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)

             scala> val b = new StringBuilder()
             b: StringBuilder =

             scala> val h = a.addString(b)
             b: StringBuilder = 1234

    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 sequence to a string builder using a separator string.

    Appends all elements of this sequence 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 sequence, separated by the string `sep`.

    Example:

             scala> val a = LinkedList(1,2,3,4)
             a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)

             scala> val b = new StringBuilder()
             b: StringBuilder =

             scala> a.addString(b, ", ")
             res0: StringBuilder = 1, 2, 3, 4

    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, B) ⇒ 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 an 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).

    B

      the type of accumulated results

    z

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

    seqop

      an operator used to accumulate results within a partition

    combop

      an associative operator used to combine results from different partitions

    Definition Classes
      TraversableOnce → GenTraversableOnce

22. #### def andThen[C](k: (B) ⇒ 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 apply(idx: Int): B

    Selects an element by its index in the sequence.

    Selects an element by its index in the sequence.

    Example:

           scala> val x = LinkedList(1, 2, 3, 4, 5)
           x: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4, 5)

           scala> x(3)
           res1: Int = 4

    idx

      The index to select.

    returns

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

    Definition Classes
      Mapped → Transformed → GenSeqLike
    Exceptions thrown
      `IndexOutOfBoundsException`

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

24. #### final def asInstanceOf[T0]: T0

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

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

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

    returns

      the receiver object.

    Definition Classes
      Any
    Exceptions thrown
      ClassCastException

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

25. #### 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 sequence should be compared

    returns

      `true`, if this sequence 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

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

    Create a copy of the receiver object.

    Create a copy of the receiver object.

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

    returns

      a copy of the receiver object.

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

      not specified by SLS as a member of AnyRef

27. #### abstract def collect[B](pf: PartialFunction[B, B]): Seq[B]

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

    [use case]

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

    B

      the element type of the returned collection.

    pf

      the partial function which filters and maps the sequence.

    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.

    Definition Classes
      GenTraversableLike

28. #### def collect[B, That](pf: PartialFunction[B, B])(implicit bf: CanBuildFrom[SeqView[B, Coll], B, That]): That

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

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

    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.

    Definition Classes
      TraversableViewLike → TraversableLike → GenTraversableLike

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

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

    Finds the first element of the sequence 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)`

30. #### def combinations(n: Int): Iterator[SeqView[B, Coll]]

    Iterates over combinations.

    Iterates over combinations.

    returns

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

    Definition Classes
      SeqLike
    Example:

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

31. #### def companion: GenericCompanion[Seq]

    The factory companion object that builds instances of class Seq.

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

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

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

    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

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

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

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

    Note: may not terminate for infinite-sized collections.

    elem

      the element to test.

    returns

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

    Definition Classes
      SeqLike

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

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

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

    Note: may not terminate for infinite-sized collections.

    that

      the sequence to test

    returns

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

    Definition Classes
      SeqLike

35. #### abstract def copyToArray(xs: Array[B], start: Int, len: Int): Unit

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

    [use case]

    Copies elements of this sequence to an array. Fills the given array `xs` with at most `len` elements of this sequence, starting at position `start`. Copying will stop once either the end of the current sequence 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.

    Definition Classes
      TraversableLike

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

    Copies elements of this sequence to an array.

    Copies elements of this sequence to an array. Fills the given array `xs` with at most `len` elements of this sequence, starting at position `start`. Copying will stop once either the end of the current sequence 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

37. #### abstract def copyToArray(xs: Array[B]): Unit

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

    [use case]

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

    xs

      the array to fill.

    Definition Classes
      GenTraversableOnce

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

    Copies values of this sequence to an array.

    Copies values of this sequence to an array. Fills the given array `xs` with values of this sequence. Copying will stop once either the end of the current sequence 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

39. #### abstract def copyToArray(xs: Array[B], start: Int): Unit

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

    [use case]

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

    xs

      the array to fill.

    start

      the starting index.

    Definition Classes
      GenTraversableOnce

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

    Copies values of this sequence to an array.

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

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

    Copies all elements of this sequence to a buffer.

    Copies all elements of this sequence to a buffer.

    Note: will not terminate for infinite-sized collections.

    dest

      The buffer to which elements are copied.

    Definition Classes
      TraversableOnce

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

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

    Tests whether every element of this sequence 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 sequence and `y` of `that`, otherwise `false`.

    Definition Classes
      SeqLike → GenSeqLike

43. #### def count(p: (B) ⇒ Boolean): Int

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

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

    p

      the predicate used to test elements.

    returns

      the number of elements satisfying the predicate `p`.

    Definition Classes
      TraversableOnce → GenTraversableOnce

44. #### abstract def diff(that: Seq[B]): Seq[B]

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

    [use case]

    Computes the multiset difference between this sequence 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 sequence 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

45. #### def diff[B >: B](that: GenSeq[B]): SeqView[B, Coll]

    Computes the multiset difference between this sequence and another sequence.

    Computes the multiset difference between this sequence and another sequence.

    Note: will not terminate for infinite-sized collections.

    B

      the element type of the returned sequence.

    that

      the sequence of elements to remove

    returns

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

46. #### def distinct: SeqView[B, Coll]

    Builds a new sequence from this sequence without any duplicate elements.

    Builds a new sequence from this sequence without any duplicate elements.

    Note: will not terminate for infinite-sized collections.

    returns

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

    Definition Classes
      SeqLike → GenSeqLike

47. #### def drop(n: Int): SeqView[B, Coll]

    Selects all elements except first n ones.

    Selects all elements except first n ones.

    n

      the number of elements to drop from this sequence.

    returns

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

    Definition Classes
      IterableViewLike → TraversableViewLike → IterableLike → TraversableLike → GenTraversableLike

48. #### def dropRight(n: Int): SeqView[B, Coll]

    Selects all elements except last n ones.

    Selects all elements except last n ones.

    n

      The number of elements to take

    returns

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

    Definition Classes
      IterableLike

49. #### def dropWhile(p: (B) ⇒ Boolean): SeqView[B, Coll]

    Drops longest prefix of elements that satisfy a predicate.

    Drops longest prefix of elements that satisfy a predicate.

    p

      The predicate used to test elements.

    returns

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

    Definition Classes
      TraversableViewLike → TraversableLike → GenTraversableLike

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

    Tests whether this sequence ends with the given sequence.

    Tests whether this sequence ends with the given sequence.

    Note: will not terminate for infinite-sized collections.

    that

      the sequence to test

    returns

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

    Definition Classes
      SeqLike → GenSeqLike

51. #### final def eq(arg0: AnyRef): Boolean

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

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

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

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

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

    returns

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

    Definition Classes
      AnyRef

52. #### 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

53. #### def exists(p: (B) ⇒ Boolean): Boolean

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

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

    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 sequence, otherwise `false`.

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

54. #### def filter(p: (B) ⇒ Boolean): SeqView[B, Coll]

    Selects all elements of this sequence which satisfy a predicate.

    Selects all elements of this sequence which satisfy a predicate.

    p

      the predicate used to test elements.

    returns

      a new sequence consisting of all elements of this sequence that satisfy the given predicate `p`. The order of the elements is preserved.

    Definition Classes
      TraversableViewLike → TraversableLike → GenTraversableLike

55. #### def filterNot(p: (B) ⇒ Boolean): SeqView[B, Coll]

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

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

    p

      the predicate used to test elements.

    returns

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

    Definition Classes
      TraversableLike → GenTraversableLike

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

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

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

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

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

      not specified by SLS as a member of AnyRef

57. #### def find(p: (B) ⇒ Boolean): Option[B]

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

    Finds the first element of the sequence 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 sequence that satisfies `p`, or `None` if none exists.

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

58. #### abstract def flatMap[B](f: (B) ⇒ GenTraversableOnce[B]): Seq[B]

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

    [use case]

    Builds a new collection by applying a function to all elements of this sequence and using the elements of the resulting collections. For example:

    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 collection-valued function `f` to each element of this sequence and concatenating the results.

    Definition Classes
      GenTraversableLike

59. #### def flatMap[B, That](f: (B) ⇒ GenTraversableOnce[B])(implicit bf: CanBuildFrom[SeqView[B, Coll], B, That]): That

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

    Builds a new collection by applying a function to all elements of this sequence and using the elements of the resulting collections. For example:

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

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

         // lettersOf will return a Seq[Char] of likely repeated letters, instead of a Set
         def lettersOf(words: Seq[String]) = words flatMap (word => word.toSet)

         // lettersOf will return a Set[Char], not a Seq
         def lettersOf(words: Seq[String]) = words.toSet flatMap (word => word.toSeq)

         // xs will be a an Iterable[Int]
         val xs = Map("a" -> List(11,111), "b" -> List(22,222)).flatMap(_._2)

         // ys will be a Map[Int, Int]
         val ys = Map("a" -> List(1 -> 11,1 -> 111), "b" -> List(2 -> 22,2 -> 222)).flatMap(_._2)

    B

      the element type of the returned collection.

    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 collection-valued function `f` to each element of this sequence and concatenating the results.

    Definition Classes
      TraversableViewLike → TraversableLike → GenTraversableLike → FilterMonadic

60. #### abstract def flatten[B]: Seq[B]

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

    [use case]

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

    B

      the type of the elements of each traversable collection.

    returns

      a new sequence resulting from concatenating all element sequences.

    Definition Classes
      GenericTraversableTemplate

61. #### def fold[A1 >: B](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 operations are performed on elements is unspecified and may be nondeterministic.

    A1

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

    z

      a neutral element for the fold operation; may be added to the result an arbitrary number of times, and must not change 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

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

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

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

    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 sequence, going left to right with the start value `z` on the left:

                      op(...op(z, x1), x2, ..., xn)

      where `x1, ..., xn` are the elements of this sequence.

    Definition Classes
      TraversableOnce → GenTraversableOnce

63. #### def foldRight[B](z: B)(op: (B, B) ⇒ B): B

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

    Applies a binary operator to all elements of this sequence 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.

    op

      the binary operator.

    returns

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

                      op(x1, op(x2, ... op(xn, z)...))

      where `x1, ..., xn` are the elements of this sequence.

    Definition Classes
      IterableLike → TraversableOnce → GenTraversableOnce

64. #### def forall(p: (B) ⇒ Boolean): Boolean

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

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

    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 sequence, otherwise `false`.

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

65. #### def force[B >: B, That](implicit bf: CanBuildFrom[Coll, B, That]): That

    Definition Classes
      TraversableViewLike → GenTraversableViewLike

66. #### abstract def foreach(f: (B) ⇒ Unit): Unit

    [use case] Applies a function `f` to all elements of this sequence.

    [use case]

    Applies a function `f` to all elements of this sequence.

    f

      the function that is applied for its side-effect to every element. The result of function `f` is discarded.

    Definition Classes
      IterableLike

67. #### def foreach[U](f: (B) ⇒ U): Unit

    Applies a function `f` to all elements of this sequence.

    Applies a function `f` to all elements of this sequence.

    U

      the type parameter describing the result of function `f`. This result will always be ignored. Typically `U` is `Unit`, but this is not necessary.

    f

      the function that is applied for its side-effect to every element. The result of function `f` is discarded.

    Definition Classes
      Transformed → Transformed → Transformed → Transformed → IterableLike → GenericTraversableTemplate → TraversableLike → GenTraversableLike → TraversableOnce → GenTraversableOnce → FilterMonadic

68. #### def genericBuilder[B]: Builder[B, Seq[B]]

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

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

    Definition Classes
      GenericTraversableTemplate

69. #### final 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.

    Definition Classes
      AnyRef → Any
    Note

      not specified by SLS as a member of AnyRef

70. #### def groupBy[K](f: (B) ⇒ K): Map[K, SeqView[B, Coll]]

    Partitions this sequence into a map of sequences according to some discriminator function.

    Partitions this sequence into a map of sequences 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 sequence.

    K

      the type of keys returned by the discriminator function.

    f

      the discriminator function.

    returns

      A map from keys to sequences 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 sequence of those elements `x` for which `f(x)` equals `k`.

    Definition Classes
      TraversableViewLike → TraversableLike → GenTraversableLike

71. #### def grouped(size: Int): Iterator[SeqView[B, Coll]]

    Partitions elements in fixed size sequences.

    Partitions elements in fixed size sequences.

    size

      the number of elements per group

    returns

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

    Definition Classes
      IterableViewLike → IterableLike
    See also

      Iterator#grouped

72. #### def hasDefiniteSize: Boolean

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

    Tests whether this sequence 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
      TraversableLike → TraversableOnce → GenTraversableOnce

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

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

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

    returns

      the hash code value for this object.

    Definition Classes
      GenSeqLike → AnyRef → Any

74. #### def head: B

    Selects the first element of this sequence.

    Selects the first element of this sequence.

    returns

      the first element of this sequence.

    Definition Classes
      IterableLike → GenIterableLike → TraversableLike → GenTraversableLike
    Exceptions thrown
      `NoSuchElementException`

      if the sequence is empty.

75. #### def headOption: Option[B]

    Optionally selects the first element.

    Optionally selects the first element.

    returns

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

    Definition Classes
      Transformed → TraversableLike

76. #### abstract def indexOf(elem: B, from: Int): Int

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

    [use case]

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

    Definition Classes
      GenSeqLike

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

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

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

    Definition Classes
      GenSeqLike

78. #### abstract def indexOf(elem: B): Int

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

    [use case]

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

    elem

      the element value to search for.

    returns

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

    Definition Classes
      GenSeqLike

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

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

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

    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 sequence that is equal (wrt `==`) to `elem`, or `-1`, if none exists.

    Definition Classes
      GenSeqLike

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

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

    Finds first index after or at a start index where this sequence 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 sequence starting at this index match the elements of sequence `that`, or `-1` of no such subsequence exists.

    Definition Classes
      SeqLike

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

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

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

    Definition Classes
      SeqLike

82. #### def indexWhere(p: (B) ⇒ 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 sequence that satisfies the predicate `p`, or `-1`, if none exists.

    Definition Classes
      SeqLike → GenSeqLike

83. #### def indexWhere(p: (B) ⇒ 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 sequence that satisfies the predicate `p`, or `-1`, if none exists.

    Definition Classes
      GenSeqLike

84. #### 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 sequence.

    Definition Classes
      SeqLike

85. #### def init: SeqView[B, Coll]

    Selects all elements except the last.

    Selects all elements except the last.

    returns

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

    Definition Classes
      TraversableViewLike → TraversableLike
    Exceptions thrown
      `UnsupportedOperationException`

      if the sequence is empty.

86. #### def inits: Iterator[SeqView[B, Coll]]

    Iterates over the inits of this sequence.

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

    returns

      an iterator over all the inits of this sequence

    Definition Classes
      TraversableLike
    Example:

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

87. #### abstract def intersect(that: Seq[B]): Seq[B]

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

    [use case]

    Computes the multiset intersection between this sequence 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 sequence 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

88. #### def intersect[B >: B](that: GenSeq[B]): SeqView[B, Coll]

    Computes the multiset intersection between this sequence and another sequence.

    Computes the multiset intersection between this sequence and another sequence.

    Note: may not terminate for infinite-sized collections.

    B

      the element type of the returned sequence.

    that

      the sequence of elements to intersect with.

    returns

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

89. #### def isDefinedAt(idx: Int): Boolean

    Tests whether this sequence contains given index.

    Tests whether this sequence contains given index.

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

    idx

      the index to test

    returns

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

    Definition Classes
      GenSeqLike

90. #### def isEmpty: Boolean

    Tests whether the sequence is empty.

    Tests whether the sequence is empty.

    returns

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

    Definition Classes
      IterableLike → GenIterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

91. #### final def isInstanceOf[T0]: Boolean

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

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

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

    returns

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

    Definition Classes
      Any

92. #### final def isTraversableAgain: Boolean

    Tests whether this sequence can be repeatedly traversed.

    Tests whether this sequence can be repeatedly traversed.

    returns

      `true`

    Definition Classes
      GenTraversableLike → GenTraversableOnce

93. #### def iterator: Iterator[B]

    Definition Classes
      Mapped → Transformed → GenIterableLike

94. #### def last: B

    Selects the last element.

    Selects the last element.

    returns

      The last element of this sequence.

    Definition Classes
      TraversableLike
    Exceptions thrown
      NoSuchElementException

      If the sequence is empty.

95. #### abstract def lastIndexOf(elem: B, end: Int): Int

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

    [use case]

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

    Definition Classes
      GenSeqLike

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

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

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

    Definition Classes
      GenSeqLike

97. #### abstract def lastIndexOf(elem: B): Int

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

    [use case]

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

    elem

      the element value to search for.

    returns

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

    Definition Classes
      GenSeqLike

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

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

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

    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 sequence that is equal (wrt `==`) to `elem`, or `-1`, if none exists.

    Definition Classes
      GenSeqLike

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

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

    Finds last index before or at a given end index where this sequence 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 sequence starting at this index match the elements of sequence `that`, or `-1` of no such subsequence exists.

    Definition Classes
      SeqLike

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

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

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

     Definition Classes
       SeqLike

101. #### def lastIndexWhere(p: (B) ⇒ 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 sequence that satisfies the predicate `p`, or `-1`, if none exists.

     Definition Classes
       SeqLike → GenSeqLike

102. #### def lastIndexWhere(p: (B) ⇒ 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 sequence that satisfies the predicate `p`, or `-1`, if none exists.

     Definition Classes
       GenSeqLike

103. #### def lastOption: Option[B]

     Optionally selects the last element.

     Optionally selects the last element.

     returns

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

     Definition Classes
       Transformed → TraversableLike

104. #### def length: Int

     The length of the sequence.

     The length of the sequence.

     Note: will not terminate for infinite-sized collections.

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

     returns

       the number of elements in this sequence.

     Definition Classes
       Mapped → Transformed → GenSeqLike

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

     Compares the length of this sequence to a test value.

     Compares the length of this sequence 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
       SeqLike

106. #### def lift: (Int) ⇒ Option[B]

     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

107. #### abstract def map[B](f: (B) ⇒ B): Seq[B]

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

     [use case]

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

     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 sequence and collecting the results.

     Definition Classes
       GenTraversableLike

108. #### def map[B, That](f: (B) ⇒ B)(implicit bf: CanBuildFrom[SeqView[B, Coll], B, That]): That

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

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

     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 sequence and collecting the results.

     Definition Classes
       TraversableViewLike → TraversableLike → GenTraversableLike → FilterMonadic

109. #### abstract def max: B

     [use case] Finds the largest element.

     [use case]

     Finds the largest element.

     returns

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

     Definition Classes
       GenTraversableOnce

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

     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 sequence with respect to the ordering `cmp`.

     Definition Classes
       TraversableOnce → GenTraversableOnce

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

112. #### abstract def min: B

     [use case] Finds the smallest element.

     [use case]

     Finds the smallest element.

     returns

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

     Definition Classes
       GenTraversableOnce

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

     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 sequence with respect to the ordering `cmp`.

     Definition Classes
       TraversableOnce → GenTraversableOnce

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

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

     Definition Classes
       ViewMkString

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

     Definition Classes
       ViewMkString

117. #### def mkString: String

     Definition Classes
       ViewMkString

118. #### final def ne(arg0: AnyRef): Boolean

     Equivalent to `!(this eq that)`.

     Equivalent to `!(this eq that)`.

     returns

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

     Definition Classes
       AnyRef

119. #### def newAppended[B >: B](that: GenTraversable[B]): Transformed[B]

     Attributes
       protected
     Definition Classes
       SeqViewLike → IterableViewLike → TraversableViewLike

120. #### def newBuilder: Builder[B, SeqView[B, Coll]]

     The builder that builds instances of type Seq[A]

     The builder that builds instances of type Seq[A]

     Attributes
       protected[this]
     Definition Classes
       TraversableViewLike → GenericTraversableTemplate → TraversableLike → HasNewBuilder

121. #### def newDropped(n: Int): Transformed[B]

     Attributes
       protected
     Definition Classes
       SeqViewLike → IterableViewLike → TraversableViewLike

122. #### def newDroppedWhile(p: (B) ⇒ Boolean): Transformed[B]

     Attributes
       protected
     Definition Classes
       SeqViewLike → IterableViewLike → TraversableViewLike

123. #### def newFiltered(p: (B) ⇒ Boolean): Transformed[B]

     Attributes
       protected
     Definition Classes
       SeqViewLike → IterableViewLike → TraversableViewLike

124. #### def newFlatMapped[B](f: (B) ⇒ GenTraversableOnce[B]): Transformed[B]

     Attributes
       protected
     Definition Classes
       SeqViewLike → IterableViewLike → TraversableViewLike

125. #### def newForced[B](xs: ⇒ GenSeq[B]): Transformed[B]

     Boilerplate method, to override in each subclass This method could be eliminated if Scala had virtual classes

     Boilerplate method, to override in each subclass This method could be eliminated if Scala had virtual classes

     Attributes
       protected
     Definition Classes
       SeqViewLike → IterableViewLike → TraversableViewLike

126. #### def newMapped[B](f: (B) ⇒ B): Transformed[B]

     Attributes
       protected
     Definition Classes
       SeqViewLike → IterableViewLike → TraversableViewLike

127. #### def newPatched[B >: B](_from: Int, _patch: GenSeq[B], _replaced: Int): Transformed[B]

     Attributes
       protected
     Definition Classes
       SeqViewLike

128. #### def newPrepended[B >: B](elem: B): Transformed[B]

     Attributes
       protected
     Definition Classes
       SeqViewLike

129. #### def newReversed: Transformed[B]

     Attributes
       protected
     Definition Classes
       SeqViewLike

130. #### def newSliced(_endpoints: SliceInterval): Transformed[B]

     Attributes
       protected
     Definition Classes
       SeqViewLike → IterableViewLike → TraversableViewLike

131. #### def newTaken(n: Int): Transformed[B]

     Attributes
       protected
     Definition Classes
       SeqViewLike → IterableViewLike → TraversableViewLike

132. #### def newTakenWhile(p: (B) ⇒ Boolean): Transformed[B]

     Attributes
       protected
     Definition Classes
       SeqViewLike → IterableViewLike → TraversableViewLike

133. #### def newZipped[B](that: GenIterable[B]): Transformed[(B, B)]

     Boilerplate method, to override in each subclass This method could be eliminated if Scala had virtual classes

     Boilerplate method, to override in each subclass This method could be eliminated if Scala had virtual classes

     Attributes
       protected
     Definition Classes
       SeqViewLike → IterableViewLike

134. #### def newZippedAll[A1 >: B, B](that: GenIterable[B], _thisElem: A1, _thatElem: B): Transformed[(A1, B)]

     Attributes
       protected
     Definition Classes
       SeqViewLike → IterableViewLike

135. #### def nonEmpty: Boolean

     Tests whether the sequence is not empty.

     Tests whether the sequence is not empty.

     returns

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

136. #### final def notify(): Unit

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

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

     Definition Classes
       AnyRef
     Note

       not specified by SLS as a member of AnyRef

137. #### final def notifyAll(): Unit

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

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

     Definition Classes
       AnyRef
     Note

       not specified by SLS as a member of AnyRef

138. #### def orElse[A1 <: Int, B1 >: B](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

139. #### abstract def padTo(len: Int, elem: B): Seq[B]

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

     [use case]

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

     len

       the target length

     elem

       the padding value

     returns

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

     Definition Classes
       GenSeqLike

140. #### def padTo[B >: B, That](len: Int, elem: B)(implicit bf: CanBuildFrom[SeqView[B, Coll], B, That]): That

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

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

     B

       the element type of the returned sequence.

     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 sequence followed by the minimal number of occurrences of `elem` so that the resulting collection has a length of at least `len`.

     Definition Classes
       SeqViewLike → SeqLike → GenSeqLike

141. #### def par: ParSeq[B]

     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

142. #### def parCombiner: Combiner[B, ParSeq[B]]

     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
       SeqLike → TraversableLike → Parallelizable

143. #### def partition(p: (B) ⇒ Boolean): (SeqView[B, Coll], SeqView[B, Coll])

     Partitions this sequence in two sequences according to a predicate.

     Partitions this sequence in two sequences according to a predicate.

     p

       the predicate on which to partition.

     returns

       a pair of sequences: the first sequence consists of all elements that satisfy the predicate `p` and the second sequence consists of all elements that don't. The relative order of the elements in the resulting sequences is the same as in the original sequence.

     Definition Classes
       TraversableViewLike → TraversableLike → GenTraversableLike

144. #### abstract def patch(from: Int, that: GenSeq[B], replaced: Int): Seq[B]

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

     [use case]

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

     from

       the index of the first replaced element

     replaced

       the number of elements to drop in the original sequence

     returns

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

     Definition Classes
       GenSeqLike

145. #### def patch[B >: B, That](from: Int, patch: GenSeq[B], replaced: Int)(implicit bf: CanBuildFrom[SeqView[B, Coll], B, That]): That

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

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

     B

       the element type of the returned sequence.

     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 sequence

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

     Definition Classes
       SeqViewLike → SeqLike → GenSeqLike

146. #### def permutations: Iterator[SeqView[B, Coll]]

     Iterates over distinct permutations.

     Iterates over distinct permutations.

     returns

       An Iterator which traverses the distinct permutations of this sequence.

     Definition Classes
       SeqLike
     Example:

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

147. #### def prefixLength(p: (B) ⇒ 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 sequence such that every element of the segment satisfies the predicate `p`.

     Definition Classes
       GenSeqLike

148. #### abstract def product: B

     [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 sequence with respect to the `*` operator in `num`.

     Definition Classes
       GenTraversableOnce

149. #### def product[B >: B](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 sequence with respect to the `*` operator in `num`.

     Definition Classes
       TraversableOnce → GenTraversableOnce

150. #### def reduce[A1 >: B](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.

     A1

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

     op

       A binary operator that must be associative.

     returns

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

     Definition Classes
       TraversableOnce → GenTraversableOnce
     Exceptions thrown
       UnsupportedOperationException

       if this sequence is empty.

151. #### def reduceLeft[B >: B](op: (B, B) ⇒ B): B

     Definition Classes
       TraversableOnce

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

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

     Optionally applies a binary operator to all elements of this sequence, 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 sequence is nonempty, `None` otherwise.

     Definition Classes
       TraversableOnce → GenTraversableOnce

153. #### def reduceOption[A1 >: B](op: (A1, A1) ⇒ A1): Option[A1]

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

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

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

     A1

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

     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

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

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

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

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

       where `x1, ..., xn` are the elements of this sequence.

     Definition Classes
       IterableLike → TraversableOnce → GenTraversableOnce
     Exceptions thrown
       `UnsupportedOperationException`

       if this sequence is empty.

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

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

     Optionally applies a binary operator to all elements of this sequence, 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 sequence is nonempty, `None` otherwise.

     Definition Classes
       TraversableOnce → GenTraversableOnce

156. #### def repr: SeqView[B, Coll]

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

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

     Definition Classes
       TraversableLike → GenTraversableLike

157. #### def reverse: SeqView[B, Coll]

     Returns new sequence wih elements in reversed order.

     Returns new sequence wih elements in reversed order.

     Note: will not terminate for infinite-sized collections.

     returns

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

     Definition Classes
       SeqViewLike → SeqLike → GenSeqLike

158. #### def reverseIterator: Iterator[B]

     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 sequence in reversed order

     Definition Classes
       SeqLike

159. #### abstract def reverseMap[B](f: (B) ⇒ B): Seq[B]

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

     [use case]

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

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

     Definition Classes
       GenSeqLike

160. #### def reverseMap[B, That](f: (B) ⇒ B)(implicit bf: CanBuildFrom[SeqView[B, Coll], B, That]): That

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

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

     Definition Classes
       SeqViewLike → SeqLike → GenSeqLike

161. #### def reversed: List[B]

     Attributes
       protected[this]
     Definition Classes
       TraversableOnce

162. #### abstract def sameElements(that: GenIterable[B]): Boolean

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

     [use case]

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

     that

       the collection to compare with.

     returns

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

     Definition Classes
       GenIterableLike

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

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

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

     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
       IterableLike → GenIterableLike

164. #### def scan[B >: B, That](z: B)(op: (B, B) ⇒ B)(implicit cbf: CanBuildFrom[SeqView[B, Coll], 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 sequence containing the prefix scan of the elements in this sequence

     Definition Classes
       TraversableLike → GenTraversableLike

165. #### def scanLeft[B, That](z: B)(op: (B, B) ⇒ B)(implicit bf: CanBuildFrom[SeqView[B, Coll], B, That]): That

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

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

     Note: will not terminate for infinite-sized collections.

     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
       TraversableViewLike → TraversableLike → GenTraversableLike

166. #### def scanRight[B, That](z: B)(op: (B, B) ⇒ B)(implicit bf: CanBuildFrom[SeqView[B, Coll], 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
       TraversableViewLike → TraversableLike → GenTraversableLike
     Annotations
       @migration
     Migration

       (Changed in version 2.9.0) The behavior of `scanRight` has changed. The previous behavior can be reproduced with scanRight.reverse.

167. #### def segmentLength(p: (B) ⇒ 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 sequence starting from index `from` such that every element of the segment satisfies the predicate `p`.

     Definition Classes
       SeqLike → GenSeqLike

168. #### def seq: Seq[B]

     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 → GenSeq → Iterable → GenIterable → Traversable → GenTraversable → Parallelizable → TraversableOnce → GenTraversableOnce

169. #### def size: Int

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

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

     Note: will not terminate for infinite-sized collections.

     returns

       the number of elements in this sequence.

     Definition Classes
       SeqLike → GenTraversableLike → TraversableOnce → GenTraversableOnce

170. #### def slice(from: Int, until: Int): SeqView[B, Coll]

     Selects an interval of elements.

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

            from <= indexOf(x) < until

     from

       the lowest index to include from this sequence.

     until

       the highest index to EXCLUDE from this sequence.

     returns

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

     Definition Classes
       IterableLike → TraversableLike → GenTraversableLike

171. #### def sliding[B >: B](size: Int, step: Int): Iterator[SeqView[B, Coll]]

     Definition Classes
       IterableViewLike → IterableLike

172. #### def sliding[B >: B](size: Int): Iterator[SeqView[B, Coll]]

     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 sequences 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

173. #### def sortBy[B](f: (B) ⇒ B)(implicit ord: Ordering[B]): SeqView[B, Coll]

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

     Sorts this Seq 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 sequence consisting of the elements of this sequence 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.

174. #### def sortWith(lt: (B, B) ⇒ Boolean): SeqView[B, Coll]

     Sorts this sequence according to a comparison function.

     Sorts this sequence 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 sequence consisting of the elements of this sequence 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")

175. #### def sorted[B >: B](implicit ord: Ordering[B]): SeqView[B, Coll]

     Sorts this sequence according to an Ordering.

     Sorts this sequence 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 sequence consisting of the elements of this sequence sorted according to the ordering `ord`.

     Definition Classes
       SeqViewLike → SeqLike
     See also

       scala.math.Ordering

176. #### def span(p: (B) ⇒ Boolean): (SeqView[B, Coll], SeqView[B, Coll])

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

     Splits this sequence 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 sequence whose elements all satisfy `p`, and the rest of this sequence.

     Definition Classes
       TraversableViewLike → TraversableLike → GenTraversableLike

177. #### def splitAt(n: Int): (SeqView[B, Coll], SeqView[B, Coll])

     Splits this sequence into two at a given position.

     Splits this sequence 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 sequences consisting of the first `n` elements of this sequence, and the other elements.

     Definition Classes
       TraversableViewLike → TraversableLike → GenTraversableLike

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

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

     Tests whether this sequence 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 sequence at index `offset`, otherwise `false`.

     Definition Classes
       SeqLike → GenSeqLike

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

     Tests whether this sequence starts with the given sequence.

     Tests whether this sequence starts with the given sequence.

     that

       the sequence to test

     returns

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

     Definition Classes
       GenSeqLike

180. #### def stringPrefix: String

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

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

     returns

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

     Definition Classes
       SeqViewLike → IterableViewLike → TraversableViewLike → TraversableLike → GenTraversableLike

181. #### abstract def sum: B

     [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 sequence with respect to the `+` operator in `num`.

     Definition Classes
       GenTraversableOnce

182. #### def sum[B >: B](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 sequence with respect to the `+` operator in `num`.

     Definition Classes
       TraversableOnce → GenTraversableOnce

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

     Definition Classes
       AnyRef

184. #### def tail: SeqView[B, Coll]

     Selects all elements except the first.

     Selects all elements except the first.

     returns

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

     Definition Classes
       TraversableLike → GenTraversableLike
     Exceptions thrown
       `UnsupportedOperationException`

       if the sequence is empty.

185. #### def tails: Iterator[SeqView[B, Coll]]

     Iterates over the tails of this sequence.

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

     returns

       an iterator over all the tails of this sequence

     Definition Classes
       TraversableLike
     Example:

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

186. #### def take(n: Int): SeqView[B, Coll]

     Selects first n elements.

     Selects first n elements.

     n

       Tt number of elements to take from this sequence.

     returns

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

     Definition Classes
       IterableViewLike → TraversableViewLike → IterableLike → TraversableLike → GenTraversableLike

187. #### def takeRight(n: Int): SeqView[B, Coll]

     Selects last n elements.

     Selects last n elements.

     n

       the number of elements to take

     returns

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

     Definition Classes
       IterableLike

188. #### def takeWhile(p: (B) ⇒ Boolean): SeqView[B, Coll]

     Takes longest prefix of elements that satisfy a predicate.

     Takes longest prefix of elements that satisfy a predicate.

     p

       The predicate used to test elements.

     returns

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

     Definition Classes
       IterableLike → TraversableLike → GenTraversableLike

189. #### def thisCollection: Seq[B]

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

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

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

190. #### def thisSeq: Seq[B]

     Attributes
       protected[this]
     Definition Classes
       ViewMkString

191. #### abstract def toArray: Array[B]

     [use case] Converts this sequence to an array.

     [use case]

     Converts this sequence to an array.

     Note: will not terminate for infinite-sized collections.

     returns

       an array containing all elements of this sequence.

     Definition Classes
       GenTraversableOnce

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

     Converts this sequence to an array.

     Converts this sequence 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 sequence.

     Definition Classes
       TraversableOnce → GenTraversableOnce

193. #### def toBuffer[B >: B]: Buffer[B]

     Converts this sequence to a mutable buffer.

     Converts this sequence to a mutable buffer.

     Note: will not terminate for infinite-sized collections.

     returns

       a buffer containing all elements of this sequence.

     Definition Classes
       TraversableOnce → GenTraversableOnce

194. #### def toCollection(repr: SeqView[B, Coll]): Seq[B]

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

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

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

195. #### def toIndexedSeq[B >: B]: IndexedSeq[B]

     Converts this sequence to an indexed sequence.

     Converts this sequence to an indexed sequence.

     Note: will not terminate for infinite-sized collections.

     returns

       an indexed sequence containing all elements of this sequence.

     Definition Classes
       TraversableOnce → GenTraversableOnce

196. #### def toIterable: Iterable[B]

     Converts this sequence to an iterable collection.

     Converts this sequence 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 sequence.

     Definition Classes
       IterableLike → TraversableOnce → GenTraversableOnce

197. #### def toIterator: Iterator[B]

     Returns an Iterator over the elements in this sequence.

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

     Definition Classes
       TraversableLike → GenTraversableOnce

198. #### def toList: List[B]

     Converts this sequence to a list.

     Converts this sequence to a list.

     Note: will not terminate for infinite-sized collections.

     returns

       a list containing all elements of this sequence.

     Definition Classes
       TraversableOnce → GenTraversableOnce

199. #### abstract def toMap[T, U]: Map[T, U]

     [use case] Converts this sequence to a map.

     [use case]

     Converts this sequence 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 sequence.

     Definition Classes
       GenTraversableOnce

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

     Converts this sequence to a map.

     Converts this sequence 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 sequence.

     Definition Classes
       TraversableOnce → GenTraversableOnce

201. #### def toSeq: Seq[B]

     Converts this sequence to a sequence.

     Converts this sequence to a sequence.

     Note: will not terminate for infinite-sized collections.

     Overridden for efficiency.

     returns

       a sequence containing all elements of this sequence.

     Definition Classes
       SeqLike → GenSeqLike → TraversableOnce → GenTraversableOnce

202. #### def toSet[B >: B]: Set[B]

     Converts this sequence to a set.

     Converts this sequence to a set.

     Note: will not terminate for infinite-sized collections.

     returns

       a set containing all elements of this sequence.

     Definition Classes
       TraversableOnce → GenTraversableOnce

203. #### def toStream: Stream[B]

     Converts this sequence to a stream.

     Converts this sequence to a stream.

     Note: will not terminate for infinite-sized collections.

     returns

       a stream containing all elements of this sequence.

     Definition Classes
       IterableLike → TraversableLike → GenTraversableOnce

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

     Creates a String representation of this object.

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

     returns

       a String representation of the object.

     Definition Classes
       Transformed → Transformed → Transformed → Transformed → Transformed → Transformed → TraversableViewLike → SeqLike → TraversableLike → Function1 → AnyRef → Any

205. #### def toTraversable: Traversable[B]

     Converts this sequence to an unspecified Traversable.

     Converts this sequence 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 sequence.

     Definition Classes
       TraversableLike → TraversableOnce → GenTraversableOnce

206. #### def transpose[B](implicit asTraversable: (B) ⇒ GenTraversableOnce[B]): Seq[Seq[B]]

     Transposes this sequence of traversable collections into a sequence of sequences.

     Transposes this sequence of traversable collections into a sequence of sequences.

     B

       the type of the elements of each traversable collection.

     asTraversable

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

     returns

       a two-dimensional sequence of sequences which has as nth row the nth column of this sequence.

     Definition Classes
       GenericTraversableTemplate
     Annotations
       @migration
     Migration

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

     Exceptions thrown
       `IllegalArgumentException`

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

207. #### lazy val underlying: Coll

     Definition Classes
       Transformed → GenTraversableViewLike

208. #### abstract def union(that: Seq[B]): Seq[B]

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

     [use case]

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

     Definition Classes
       SeqLike

209. #### def union[B >: B, That](that: GenSeq[B])(implicit bf: CanBuildFrom[SeqView[B, Coll], B, That]): That

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

     Produces a new sequence which contains all elements of this sequence 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 sequence.

     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 sequence followed by all elements of `that`.

     Definition Classes
       SeqViewLike → SeqLike → GenSeqLike

210. #### def unzip[A1, A2](implicit asPair: (B) ⇒ (A1, A2)): (Seq[A1], Seq[A2])

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

     Converts this sequence 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 sequence is a pair.

     returns

       a pair sequences, containing the first, respectively second half of each element pair of this sequence.

     Definition Classes
       GenericTraversableTemplate

211. #### def unzip3[A1, A2, A3](implicit asTriple: (B) ⇒ (A1, A2, A3)): (Seq[A1], Seq[A2], Seq[A3])

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

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

     asTriple

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

     returns

       a triple sequences, containing the first, second, respectively third member of each element triple of this sequence.

     Definition Classes
       GenericTraversableTemplate

212. #### abstract def updated(index: Int, elem: B): Seq[B]

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

     [use case]

     A copy of this sequence with one single replaced element.

     index

       the position of the replacement

     elem

       the replacing element

     returns

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

     Definition Classes
       GenSeqLike

213. #### def updated[B >: B, That](index: Int, elem: B)(implicit bf: CanBuildFrom[SeqView[B, Coll], B, That]): That

     A copy of this sequence with one single replaced element.

     A copy of this sequence with one single replaced element.

     B

       the element type of the returned sequence.

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

     Definition Classes
       SeqViewLike → SeqLike → GenSeqLike

214. #### def view(from: Int, until: Int): SeqView[B, SeqView[B, Coll]]

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

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

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

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

     Definition Classes
       SeqLike → IterableLike → TraversableLike

215. #### def view: SeqView[B, SeqView[B, Coll]]

     Creates a non-strict view of this sequence.

     Creates a non-strict view of this sequence.

     returns

       a non-strict view of this sequence.

     Definition Classes
       SeqLike → IterableLike → TraversableLike

216. #### final def viewIdString: String

     Attributes
       protected[this]
     Definition Classes
       Transformed → GenTraversableViewLike

217. #### final def viewIdentifier: String

     Attributes
       protected[this]
     Definition Classes
       Mapped → GenTraversableViewLike

218. #### def viewToString: String

     Definition Classes
       GenTraversableViewLike

219. #### final def wait(): Unit

     Definition Classes
       AnyRef
     Annotations
       @throws()

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

     Definition Classes
       AnyRef
     Annotations
       @throws()

221. #### final def wait(arg0: Long): Unit

     Definition Classes
       AnyRef
     Annotations
       @throws()

222. #### def withFilter(p: (B) ⇒ Boolean): SeqView[B, Coll]

     Creates a non-strict filter of this sequence.

     Creates a non-strict filter of this sequence.

     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 sequence which satisfy the predicate `p`.

     Definition Classes
       TraversableViewLike → TraversableLike → FilterMonadic

223. #### abstract def zip[B](that: GenIterable[B]): Seq[(B, B)]

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

     [use case]

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

     B

       the type of the second half of the returned pairs

     that

       The iterable providing the second half of each result pair

     returns

       a new collection of type `That` containing pairs consisting of corresponding elements of this sequence and `that`. The length of the returned collection is the minimum of the lengths of this sequence and `that`.

     Definition Classes
       GenIterableLike

224. #### def zip[A1 >: B, B, That](that: GenIterable[B])(implicit bf: CanBuildFrom[SeqView[B, Coll], (A1, B), That]): That

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

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

     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

       a new collection of type `That` containing pairs consisting of corresponding elements of this sequence and `that`. The length of the returned collection is the minimum of the lengths of this sequence and `that`.

     Definition Classes
       IterableViewLike → IterableLike → GenIterableLike

225. #### abstract def zipAll[B](that: Iterable[B], thisElem: B, thatElem: B): Seq[(B, B)]

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

     [use case]

     Returns a sequence formed from this sequence 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 sequence is shorter than `that`.

     thatElem

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

     returns

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

     Definition Classes
       GenIterableLike

226. #### def zipAll[B, A1 >: B, That](that: GenIterable[B], thisElem: A1, thatElem: B)(implicit bf: CanBuildFrom[SeqView[B, Coll], (A1, B), That]): That

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

     Returns a sequence formed from this sequence 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 sequence is shorter than `that`.

     thatElem

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

     returns

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

     Definition Classes
       IterableViewLike → IterableLike → GenIterableLike

227. #### abstract def zipWithIndex: Seq[(B, Int)]

     [use case] Zips this sequence with its indices.

     [use case]

     Zips this sequence with its indices.

     returns

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

     Definition Classes
       GenIterableLike

228. #### def zipWithIndex[A1 >: B, That](implicit bf: CanBuildFrom[SeqView[B, Coll], (A1, Int), That]): That

     Zips this sequence with its indices.

     Zips this sequence with its 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 sequence paired with their index. Indices start at `0`.

     Definition Classes
       IterableViewLike → IterableLike → GenIterableLike

### Deprecated Value Members

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

   Definition Classes
     IterableLike
   Annotations
     @deprecated
   Deprecated

     (Since version 2.8.0) use `iterator' instead`

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

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

   Tests whether every element of this sequence 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 sequence and `y` of `that`, otherwise `false`.

   Definition Classes
     SeqLike
   Annotations
     @deprecated
   Deprecated

     (Since version 2.8.0) use `corresponds` instead

3. #### def findIndexOf(p: (B) ⇒ 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

     (Since version 2.8.0) Use indexWhere(p) instead.

4. #### def findLastIndexOf(p: (B) ⇒ 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

     (Since version 2.8.0) use `lastIndexWhere` instead

5. #### def first: B

   Definition Classes
     IterableLike
   Annotations
     @deprecated
   Deprecated

     (Since version 2.8.0) use `head' instead`

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

   `None` if iterable is empty.

   `None` if iterable is empty.

   Definition Classes
     IterableLike
   Annotations
     @deprecated
   Deprecated

     (Since version 2.8.0) use `headOption' instead`

7. #### def projection: SeqView[B, SeqView[B, Coll]]

   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

     (Since version 2.8.0) use `view' instead`

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

   Definition Classes
     SeqLike
   Annotations
     @deprecated
   Deprecated

     (Since version 2.8.0) use `reverseIterator' instead`

### Inherited from Transformed[B]

### Inherited from SeqView[B, Coll]

### Inherited from SeqViewLike[B, Coll, SeqView[B, Coll]]

### Inherited from Seq[B]

### Inherited from SeqLike[B, SeqView[B, Coll]]

### Inherited from PartialFunction[Int, B]

### Inherited from (Int) ⇒ B

### Inherited from Mapped[B]

### Inherited from Transformed[B]

### Inherited from GenSeqView[B, Coll]

### Inherited from GenSeqViewLike[B, Coll, SeqView[B, Coll]]

### Inherited from GenSeq[B]

### Inherited from GenSeqLike[B, SeqView[B, Coll]]

### Inherited from Mapped[B]

### Inherited from Transformed[B]

### Inherited from IterableView[B, Coll]

### Inherited from IterableViewLike[B, Coll, SeqView[B, Coll]]

### Inherited from Iterable[B]

### Inherited from IterableLike[B, SeqView[B, Coll]]

### Inherited from Equals

### Inherited from Mapped[B]

### Inherited from Transformed[B]

### Inherited from GenIterableView[B, Coll]

### Inherited from GenIterableViewLike[B, Coll, SeqView[B, Coll]]

### Inherited from GenIterable[B]

### Inherited from GenIterableLike[B, SeqView[B, Coll]]

### Inherited from Mapped[B]

### Inherited from Transformed[B]

### Inherited from TraversableView[B, Coll]

### Inherited from GenTraversableView[B, Coll]

### Inherited from TraversableViewLike[B, Coll, SeqView[B, Coll]]

### Inherited from GenTraversableViewLike[B, Coll, SeqView[B, Coll]]

### Inherited from ViewMkString[B]

### Inherited from Traversable[B]

### Inherited from GenTraversable[B]

### Inherited from GenericTraversableTemplate[B, Seq]

### Inherited from TraversableLike[B, SeqView[B, Coll]]

### Inherited from GenTraversableLike[B, SeqView[B, Coll]]

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

### Inherited from TraversableOnce[B]

### Inherited from GenTraversableOnce[B]

### Inherited from FilterMonadic[B, SeqView[B, Coll]]

### Inherited from HasNewBuilder[B, SeqView[B, Coll]]

### Inherited from AnyRef

### Inherited from Any