scala.collection

GenSeqViewLike

trait GenSeqViewLike[+A, +Coll, +This <: GenSeqView[A, Coll] with GenSeqViewLike[A, Coll, This]] extends GenSeq[A] with GenSeqLike[A, This] with GenIterableView[A, Coll] with GenIterableViewLike[A, Coll, This]

Self Type
GenSeqViewLike[A, Coll, This]
Source
GenSeqViewLike.scala
Linear Supertypes
Known Subclasses
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Inherited
  1. GenSeqViewLike
  2. GenIterableView
  3. GenIterableViewLike
  4. GenTraversableView
  5. GenTraversableViewLike
  6. GenSeq
  7. GenIterable
  8. GenTraversable
  9. GenericTraversableTemplate
  10. HasNewBuilder
  11. GenSeqLike
  12. Equals
  13. GenIterableLike
  14. GenTraversableLike
  15. Parallelizable
  16. GenTraversableOnce
  17. AnyRef
  18. Any
Implicitly
  1. by traversable2ops
  2. by any2stringadd
  3. by any2stringfmt
  4. by any2ArrowAssoc
  5. by any2Ensuring
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Type Members

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

  2. trait DroppedWhile extends DroppedWhile with Transformed[A]

  3. trait EmptyView extends Transformed[Nothing] with EmptyView

  4. trait Filtered extends Filtered with Transformed[A]

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

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

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

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

  10. trait Reversed extends Transformed[A]

  11. trait Sliced extends Sliced with Transformed[A]

  12. trait TakenWhile extends TakenWhile with Transformed[A]

  13. trait Transformed[+B] extends GenSeqView[B, Coll] with Transformed[B]

    The implementation base trait of this view.

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

    Definition Classes
    GenSeqViewLikeGenIterableViewLike
  15. trait ZippedAll[A1 >: A, B] extends ZippedAll[A1, B] with Transformed[(A1, B)]

    Definition Classes
    GenSeqViewLikeGenIterableViewLike

Abstract Value Members

  1. abstract def /:[B](z: B)(op: (B, A) ⇒ B): B

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

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

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

    Examples:

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

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

    Note: will not terminate for infinite-sized collections.

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

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

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

    where x1, ..., xn are the elements of this collection.

    Definition Classes
    GenTraversableOnce
  2. abstract def :\[B](z: B)(op: (A, B) ⇒ B): B

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

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

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

    Note: will not terminate for infinite-sized collections.

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

    Examples:

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

    scala> val a = LinkedList(1,2,3,4)
    a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)
    
    scala> val b = (a :\ 5)(_+_)
    b: Int = 15
    
    scala> val c = (a :\ 5)((x,y) => x + y)
    c: Int = 15
    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 collection, going right to left with the start value z on the right:

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

    where x1, ..., xn are the elements of this collection.

    Definition Classes
    GenTraversableOnce
  3. abstract def aggregate[B](z: B)(seqop: (B, A) ⇒ B, combop: (B, B) ⇒ B): B

    Aggregates the results of applying an operator to subsequent elements.

    Aggregates the results of applying an operator to subsequent elements.

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

    Selects an element by its index in the collection.

    Selects an element by its index in the collection.

    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 collection at index idx, where 0 indicates the first element.

    Definition Classes
    GenSeqLike
    Exceptions thrown
    `IndexOutOfBoundsException`

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

  5. abstract def canEqual(that: Any): Boolean

    A method that should be called from every well-designed equals method that is open to be overridden in a subclass.

    A method that should be called from every well-designed equals method that is open to be overridden in a subclass. See Programming in Scala, Chapter 28 for discussion and design.

    that

    the value being probed for possible equality

    returns

    true if this instance can possibly equal that, otherwise false

    Definition Classes
    Equals
  6. abstract def copyToArray[B >: A](xs: Array[B], start: Int, len: Int): Unit

    Definition Classes
    GenTraversableOnce
  7. abstract def corresponds[B](that: GenSeq[B])(p: (A, B) ⇒ Boolean): Boolean

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

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

    Definition Classes
    GenSeqLike
  8. abstract def count(p: (A) ⇒ Boolean): Int

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

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

    p

    the predicate used to test elements.

    returns

    the number of elements satisfying the predicate p.

    Definition Classes
    GenTraversableOnce
  9. abstract def distinct: This

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

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

    Note: will not terminate for infinite-sized collections.

    returns

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

    Definition Classes
    GenSeqLike
  10. abstract def drop(n: Int): This

    Selects all elements except first n ones.

    Selects all elements except first n ones.

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

    n

    the number of elements to drop from this collection.

    returns

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

    Definition Classes
    GenTraversableLike
  11. abstract def dropWhile(pred: (A) ⇒ Boolean): This

    Drops longest prefix of elements that satisfy a predicate.

    Drops longest prefix of elements that satisfy a predicate.

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

    pred

    The predicate used to test elements.

    returns

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

    Definition Classes
    GenTraversableLike
  12. abstract def endsWith[B](that: GenSeq[B]): Boolean

    Tests whether this collection ends with the given sequence.

    Tests whether this collection ends with the given sequence.

    Note: will not terminate for infinite-sized collections.

    that

    the sequence to test

    returns

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

    Definition Classes
    GenSeqLike
  13. abstract def exists(pred: (A) ⇒ Boolean): Boolean

    Definition Classes
    GenTraversableOnce
  14. abstract def filter(pred: (A) ⇒ Boolean): This

    Selects all elements of this collection which satisfy a predicate.

    Selects all elements of this collection which satisfy a predicate.

    pred

    the predicate used to test elements.

    returns

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

    Definition Classes
    GenTraversableLike
  15. abstract def filterNot(pred: (A) ⇒ Boolean): This

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

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

    pred

    the predicate used to test elements.

    returns

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

    Definition Classes
    GenTraversableLike
  16. abstract def find(pred: (A) ⇒ Boolean): Option[A]

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

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

    Note: may not terminate for infinite-sized collections.

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

    pred

    the predicate used to test elements.

    returns

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

    Definition Classes
    GenTraversableOnce
  17. abstract def fold[A1 >: A](z: A1)(op: (A1, A1) ⇒ A1): A1

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

    Folds the elements of this collection 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
    GenTraversableOnce
  18. abstract def foldLeft[B](z: B)(op: (B, A) ⇒ B): B

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

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

    Note: will not terminate for infinite-sized collections.

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

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

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

    where x1, ..., xn are the elements of this collection.

    Definition Classes
    GenTraversableOnce
  19. abstract def foldRight[B](z: B)(op: (A, B) ⇒ B): B

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

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

    Note: will not terminate for infinite-sized collections.

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

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

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

    where x1, ..., xn are the elements of this collection.

    Definition Classes
    GenTraversableOnce
  20. abstract def forall(pred: (A) ⇒ Boolean): Boolean

    Definition Classes
    GenTraversableOnce
  21. abstract def force[B >: A, That](implicit bf: CanBuildFrom[Coll, B, That]): That

    Definition Classes
    GenTraversableViewLike
  22. abstract def groupBy[K](f: (A) ⇒ K): GenMap[K, This]

    Partitions this collection into a map of collections according to some discriminator function.

    Partitions this collection into a map of collections 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 collection.

    K

    the type of keys returned by the discriminator function.

    f

    the discriminator function.

    returns

    A map from keys to collections 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 collection of those elements x for which f(x) equals k.

    Definition Classes
    GenTraversableLike
  23. abstract def hasDefiniteSize: Boolean

    Definition Classes
    GenTraversableOnce
  24. abstract def head: A

    Selects the first element of this collection.

    Selects the first element of this collection.

    returns

    the first element of this collection.

    Definition Classes
    GenericTraversableTemplate
    Exceptions thrown
    `NoSuchElementException`

    if the collection is empty.

  25. abstract def headOption: Option[A]

    Optionally selects the first element.

    Optionally selects the first element.

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

    returns

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

    Definition Classes
    GenTraversableLike
  26. abstract def indexWhere(p: (A) ⇒ Boolean, from: Int): Int

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

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

    Note: may not terminate for infinite-sized collections.

    p

    the predicate used to test elements.

    from

    the start index

    returns

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

    Definition Classes
    GenSeqLike
  27. abstract def init: This

    Selects all elements except the last.

    Selects all elements except the last.

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

    returns

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

    Definition Classes
    GenTraversableLike
    Exceptions thrown
    `UnsupportedOperationException`

    if the collection is empty.

  28. abstract def isEmpty: Boolean

    Tests whether this collection is empty.

    Tests whether this collection is empty.

    returns

    true if the collection contain no elements, false otherwise.

    Definition Classes
    GenericTraversableTemplate
  29. abstract def isTraversableAgain: Boolean

    Tests whether this collection can be repeatedly traversed.

    Tests whether this collection can be repeatedly traversed.

    returns

    true

    Definition Classes
    GenTraversableLikeGenTraversableOnce
  30. abstract def iterator: Iterator[A]

    Definition Classes
    GenIterableLike
  31. abstract def last: A

    Selects the last element.

    Selects the last element.

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

    returns

    The last element of this collection.

    Definition Classes
    GenTraversableLike
    Exceptions thrown
    NoSuchElementException

    If the collection is empty.

  32. abstract def lastIndexWhere(p: (A) ⇒ Boolean, end: Int): Int

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

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

    p

    the predicate used to test elements.

    returns

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

    Definition Classes
    GenSeqLike
  33. abstract def lastOption: Option[A]

    Optionally selects the last element.

    Optionally selects the last element.

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

    returns

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

    Definition Classes
    GenTraversableLike
  34. abstract def length: Int

    The length of the collection.

    The length of the collection.

    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 collection.

    Definition Classes
    GenSeqLike
  35. abstract def maxBy[B](f: (A) ⇒ B)(implicit cmp: Ordering[B]): A

    Definition Classes
    GenTraversableOnce
  36. abstract def minBy[B](f: (A) ⇒ B)(implicit cmp: Ordering[B]): A

    Definition Classes
    GenTraversableOnce
  37. abstract def mkString: String

    Displays all elements of this collection in a string.

    Displays all elements of this collection in a string.

    returns

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

    Definition Classes
    GenTraversableOnce
  38. abstract def mkString(sep: String): String

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

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

    sep

    the separator string.

    returns

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

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

  39. abstract def mkString(start: String, sep: String, end: String): String

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

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

    start

    the starting string.

    sep

    the separator string.

    end

    the ending string.

    returns

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

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

  40. abstract def nonEmpty: Boolean

    Tests whether the collection is not empty.

    Tests whether the collection is not empty.

    returns

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

    Definition Classes
    GenTraversableOnce
  41. abstract def parCombiner: Combiner[A, ParSeq[A]]

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

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

    returns

    a combiner for the parallel collection of type ParRepr

    Attributes
    protected[this]
    Definition Classes
    Parallelizable
  42. abstract def partition(pred: (A) ⇒ Boolean): (This, This)

    Partitions this collection in two collections according to a predicate.

    Partitions this collection in two collections according to a predicate.

    pred

    the predicate on which to partition.

    returns

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

    Definition Classes
    GenTraversableLike
  43. abstract def reduce[A1 >: A](op: (A1, A1) ⇒ A1): A1

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

    Reduces the elements of this collection 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 collection is nonempty.

    Definition Classes
    GenTraversableOnce
    Exceptions thrown
    UnsupportedOperationException

    if this collection is empty.

  44. abstract def reduceLeftOption[B >: A](op: (B, A) ⇒ B): Option[B]

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

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

    Note: will not terminate for infinite-sized collections.

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

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

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

    Definition Classes
    GenTraversableOnce
  45. abstract def reduceOption[A1 >: A](op: (A1, A1) ⇒ A1): Option[A1]

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

    Reduces the elements of this collection, 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
    GenTraversableOnce
  46. abstract def reduceRight[B >: A](op: (A, B) ⇒ B): B

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

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

    Note: will not terminate for infinite-sized collections.

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

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

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

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

    where x1, ..., xn are the elements of this collection.

    Definition Classes
    GenTraversableOnce
    Exceptions thrown
    `UnsupportedOperationException`

    if this collection is empty.

  47. abstract def reduceRightOption[B >: A](op: (A, B) ⇒ B): Option[B]

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

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

    Note: will not terminate for infinite-sized collections.

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

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

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

    Definition Classes
    GenTraversableOnce
  48. abstract def repr: This

    Definition Classes
    GenTraversableLike
  49. abstract def reverse: This

    Returns new collection wih elements in reversed order.

    Returns new collection wih elements in reversed order.

    Note: will not terminate for infinite-sized collections.

    returns

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

    Definition Classes
    GenSeqLike
  50. abstract def scan[B >: A, That](z: B)(op: (B, B) ⇒ B)(implicit cbf: CanBuildFrom[This, 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 collection containing the prefix scan of the elements in this collection

    Definition Classes
    GenTraversableLike
  51. abstract def scanLeft[B, That](z: B)(op: (B, A) ⇒ B)(implicit bf: CanBuildFrom[This, B, That]): That

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

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

    Note: will not terminate for infinite-sized collections.

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

    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 and the new element type B.

    returns

    collection with intermediate results

    Definition Classes
    GenTraversableLike
  52. abstract def scanRight[B, That](z: B)(op: (A, B) ⇒ B)(implicit bf: CanBuildFrom[This, B, That]): That

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

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

    Note: will not terminate for infinite-sized collections.

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

    Example:

    List(1, 2, 3, 4).scanRight(0)(_ + _) == List(10, 9, 7, 4, 0)
    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 and the new element type B.

    returns

    collection with intermediate results

    Definition Classes
    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.

  53. abstract def segmentLength(p: (A) ⇒ Boolean, from: Int): Int

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

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

    Note: may not terminate for infinite-sized collections.

    p

    the predicate used to test elements.

    from

    the index where the search starts.

    returns

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

    Definition Classes
    GenSeqLike
  54. abstract def seq: Seq[A]

  55. abstract def size: Int

    The size of this collection.

    The size of this collection.

    Note: will not terminate for infinite-sized collections.

    returns

    the number of elements in this collection.

    Definition Classes
    GenTraversableLikeGenTraversableOnce
  56. abstract def slice(unc_from: Int, unc_until: Int): This

    Selects an interval of elements.

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

    from <= indexOf(x) < until

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

    unc_from

    the lowest index to include from this collection.

    unc_until

    the lowest index to EXCLUDE from this collection.

    returns

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

    Definition Classes
    GenTraversableLike
  57. abstract def span(pred: (A) ⇒ Boolean): (This, This)

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

    Splits this collection 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.

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

    pred

    the test predicate

    returns

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

    Definition Classes
    GenTraversableLike
  58. abstract def splitAt(n: Int): (This, This)

    Splits this collection into two at a given position.

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

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

    n

    the position at which to split.

    returns

    a pair of collections consisting of the first n elements of this collection, and the other elements.

    Definition Classes
    GenTraversableLike
  59. abstract def startsWith[B](that: GenSeq[B], offset: Int): Boolean

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

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

    Note: 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 collection at index offset, otherwise false.

    Definition Classes
    GenSeqLike
  60. abstract def stringPrefix: String

    Defines the prefix of this object's toString representation.

    Defines the prefix of this object's toString representation.

    returns

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

    Definition Classes
    GenTraversableLike
  61. abstract def tail: This

    Selects all elements except the first.

    Selects all elements except the first.

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

    returns

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

    Definition Classes
    GenTraversableLike
    Exceptions thrown
    `UnsupportedOperationException`

    if the collection is empty.

  62. abstract def take(n: Int): This

    Selects first n elements.

    Selects first n elements.

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

    n

    Tt number of elements to take from this collection.

    returns

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

    Definition Classes
    GenTraversableLike
  63. abstract def takeWhile(pred: (A) ⇒ Boolean): This

    Takes longest prefix of elements that satisfy a predicate.

    Takes longest prefix of elements that satisfy a predicate.

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

    pred

    The predicate used to test elements.

    returns

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

    Definition Classes
    GenTraversableLike
  64. abstract def toBuffer[A1 >: A]: Buffer[A1]

    Converts this collection to a mutable buffer.

    Converts this collection to a mutable buffer.

    Note: will not terminate for infinite-sized collections.

    returns

    a buffer containing all elements of this collection.

    Definition Classes
    GenTraversableOnce
  65. abstract def toIndexedSeq: IndexedSeq[A]

    Converts this collection to an indexed sequence.

    Converts this collection to an indexed sequence.

    Note: will not terminate for infinite-sized collections.

    returns

    an indexed sequence containing all elements of this collection.

    Definition Classes
    GenTraversableOnce
  66. abstract def toIterable: GenIterable[A]

    Converts this collection to an iterable collection.

    Converts this collection 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 collection.

    Definition Classes
    GenTraversableOnce
  67. abstract def toIterator: Iterator[A]

    Returns an Iterator over the elements in this collection.

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

    Definition Classes
    GenTraversableOnce
  68. abstract def toList: List[A]

    Converts this collection to a list.

    Converts this collection to a list.

    Note: will not terminate for infinite-sized collections.

    returns

    a list containing all elements of this collection.

    Definition Classes
    GenTraversableOnce
  69. abstract def toSeq: GenSeq[A]

    Converts this collection to a sequence.

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

    Note: will not terminate for infinite-sized collections.

    returns

    a sequence containing all elements of this collection.

    Definition Classes
    GenSeqLikeGenTraversableOnce
  70. abstract def toSet[A1 >: A]: GenSet[A1]

    Converts this collection to a set.

    Converts this collection to a set.

    Note: will not terminate for infinite-sized collections.

    returns

    a set containing all elements of this collection.

    Definition Classes
    GenTraversableOnce
  71. abstract def toStream: Stream[A]

    Converts this collection to a stream.

    Converts this collection to a stream.

    Note: will not terminate for infinite-sized collections.

    returns

    a stream containing all elements of this collection.

    Definition Classes
    GenTraversableOnce
  72. abstract def toTraversable: GenTraversable[A]

    Converts this collection to an unspecified Traversable.

    Converts this collection 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 collection.

    Definition Classes
    GenTraversableOnce
  73. abstract def toVector: Vector[A]

    Converts this collection to a Vector.

    Converts this collection to a Vector.

    Note: will not terminate for infinite-sized collections.

    returns

    a vector containing all elements of this collection.

    Definition Classes
    GenTraversableOnce
  74. abstract def underlying: Coll

    Attributes
    protected
    Definition Classes
    GenTraversableViewLike
  75. abstract def viewIdString: String

    Attributes
    protected[this]
    Definition Classes
    GenTraversableViewLike
  76. abstract def viewIdentifier: String

    Attributes
    protected[this]
    Definition Classes
    GenTraversableViewLike

Concrete Value Members

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

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

    Test two objects for inequality.

    Test two objects for inequality.

    returns

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

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

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

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

    returns

    a hash value consistent with ==

    Definition Classes
    AnyRef → Any
  4. def +(other: String): String

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to StringAdd performed by method any2stringadd in scala.Predef.
    Definition Classes
    StringAdd
  5. abstract def ++[B](that: GenTraversableOnce[B]): CC[B]

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

    [use case]

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

    Example:

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

    the element type of the returned collection.

    that

    the traversable to append.

    returns

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

    Definition Classes
    GenTraversableLike
    Full Signature

    abstract def ++[B >: A, That](that: GenTraversableOnce[B])(implicit bf: CanBuildFrom[This, B, That]): That

  6. abstract def +:(elem: A): CC[A]

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

    [use case]

    A copy of the collection with an element prepended.

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

    Also, the original collection 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)
    elem

    the prepended element

    returns

    a new collection consisting of elem followed by all elements of this collection.

    Definition Classes
    GenSeqLike
    Full Signature

    abstract def +:[B >: A, That](elem: B)(implicit bf: CanBuildFrom[This, B, That]): That

  7. def ->[B](y: B): (GenSeqViewLike[A, Coll, This], B)

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to ArrowAssoc[GenSeqViewLike[A, Coll, This]] performed by method any2ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  8. abstract def :+(elem: A): CC[A]

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

    [use case]

    A copy of this collection with an element appended.

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

    Note: will not terminate for infinite-sized collections.

    Example:

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

    the appended element

    returns

    a new collection consisting of all elements of this collection followed by elem.

    Definition Classes
    GenSeqLike
    Full Signature

    abstract def :+[B >: A, That](elem: B)(implicit bf: CanBuildFrom[This, B, That]): That

  9. final def ==(arg0: AnyRef): Boolean

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

    Test two objects for equality.

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

    returns

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

    Definition Classes
    Any
  11. 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.

  12. def asParIterable: ParIterable[A]

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  13. def asParSeq: ParSeq[A]

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  14. 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

  15. abstract def collect[B](pf: PartialFunction[A, B]): CC[B]

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

    [use case]

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

    B

    the element type of the returned collection.

    pf

    the partial function which filters and maps the collection.

    returns

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

    Definition Classes
    GenTraversableLike
    Full Signature

    abstract def collect[B, That](pf: PartialFunction[A, B])(implicit bf: CanBuildFrom[This, B, That]): That

  16. def companion: GenericCompanion[GenSeq]

    The factory companion object that builds instances of class CC.

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

    Definition Classes
    GenSeqGenIterableGenTraversableGenericTraversableTemplate
  17. abstract def copyToArray(xs: Array[A], start: Int): Unit

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

    [use case]

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

    Note: will not terminate for infinite-sized collections.

    xs

    the array to fill.

    start

    the starting index.

    Definition Classes
    GenTraversableOnce
    Full Signature

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

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

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

    [use case]

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

    Note: will not terminate for infinite-sized collections.

    xs

    the array to fill.

    Definition Classes
    GenTraversableOnce
    Full Signature

    abstract def copyToArray[B >: A](xs: Array[B]): Unit

  19. abstract def diff(that: GenSeq[A]): CC[A]

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

    [use case]

    Computes the multiset difference between this collection and another sequence.

    Note: will not terminate for infinite-sized collections.

    that

    the sequence of elements to remove

    returns

    a new collection which contains all elements of this collection 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
    GenSeqLike
    Full Signature

    abstract def diff[B >: A](that: GenSeq[B]): This

  20. def ensuring(cond: (GenSeqViewLike[A, Coll, This]) ⇒ Boolean, msg: ⇒ Any): GenSeqViewLike[A, Coll, This]

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to Ensuring[GenSeqViewLike[A, Coll, This]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  21. def ensuring(cond: (GenSeqViewLike[A, Coll, This]) ⇒ Boolean): GenSeqViewLike[A, Coll, This]

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to Ensuring[GenSeqViewLike[A, Coll, This]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  22. def ensuring(cond: Boolean, msg: ⇒ Any): GenSeqViewLike[A, Coll, This]

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to Ensuring[GenSeqViewLike[A, Coll, This]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  23. def ensuring(cond: Boolean): GenSeqViewLike[A, Coll, This]

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to Ensuring[GenSeqViewLike[A, Coll, This]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  24. 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
  25. def equals(that: Any): Boolean

    The equals method for arbitrary sequences.

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

    that

    The object to compare the sequence to

    returns

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

    Definition Classes
    GenSeqLikeEqualsAny
  26. 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

  27. abstract def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): CC[B]

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

    [use case]

    Builds a new collection by applying a function to all elements of this collection 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 collection. This might cause unexpected results sometimes. For example:

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

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

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

    Definition Classes
    GenTraversableLike
    Full Signature

    abstract def flatMap[B, That](f: (A) ⇒ GenTraversableOnce[B])(implicit bf: CanBuildFrom[This, B, That]): That

  28. def flatten[B]: CC[B]

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

    [use case]

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

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

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

    the type of the elements of each traversable collection.

    returns

    a new collection resulting from concatenating all element collections.

    Definition Classes
    GenericTraversableTemplate
    Full Signature

    def flatten[B](implicit asTraversable: (A) ⇒ GenTraversableOnce[B]): GenSeq[B]

  29. abstract def foreach(f: (A) ⇒ Unit): Unit

    [use case]

    [use case]
    f

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

    Definition Classes
    GenericTraversableTemplate
    Full Signature

    abstract def foreach[U](f: (A) ⇒ U): Unit

  30. def formatted(fmtstr: String): String

    Returns string formatted according to given format string.

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

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to StringFormat performed by method any2stringfmt in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  31. def genericBuilder[B]: Builder[B, GenSeq[B]]

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

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

    Definition Classes
    GenericTraversableTemplate
  32. final def getClass(): Class[_]

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

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

    The nature of the representation is platform dependent.

    returns

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

    Definition Classes
    AnyRef → Any
    Note

    not specified by SLS as a member of AnyRef

  33. def hashCode(): Int

    Hashcodes for CC produce a value from the hashcodes of all the elements of the collection.

    Hashcodes for CC produce a value from the hashcodes of all the elements of the collection.

    returns

    the hash code value for this object.

    Definition Classes
    GenSeqLikeAny
  34. def ifParSeq[R](isbody: (ParSeq[A]) ⇒ R): Otherwise[R]

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  35. def indexOf(elem: A, from: Int): Int

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

    [use case]

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

    Note: may not terminate for infinite-sized collections.

    elem

    the element value to search for.

    from

    the start index

    returns

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

    Definition Classes
    GenSeqLike
    Full Signature

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

  36. def indexOf(elem: A): Int

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

    [use case]

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

    Note: may not terminate for infinite-sized collections.

    elem

    the element value to search for.

    returns

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

    Definition Classes
    GenSeqLike
    Full Signature

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

  37. def indexWhere(p: (A) ⇒ Boolean): Int

    Finds index of first element satisfying some predicate.

    Finds index of first element satisfying some predicate.

    Note: may not terminate for infinite-sized collections.

    p

    the predicate used to test elements.

    returns

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

    Definition Classes
    GenSeqLike
  38. abstract def intersect(that: GenSeq[A]): CC[A]

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

    [use case]

    Computes the multiset intersection between this collection and another sequence.

    Note: may not terminate for infinite-sized collections.

    that

    the sequence of elements to intersect with.

    returns

    a new collection which contains all elements of this collection 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
    GenSeqLike
    Full Signature

    abstract def intersect[B >: A](that: GenSeq[B]): This

  39. def isDefinedAt(idx: Int): Boolean

    Tests whether this collection contains given index.

    Tests whether this collection 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 collection contains an element at position idx, false otherwise.

    Definition Classes
    GenSeqLike
  40. 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
  41. def isParIterable: Boolean

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  42. def isParSeq: Boolean

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  43. def isParallel: Boolean

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  44. def lastIndexOf(elem: A, end: Int): Int

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

    [use case]

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

    Definition Classes
    GenSeqLike
    Full Signature

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

  45. def lastIndexOf(elem: A): Int

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

    [use case]

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

    Note: will not terminate for infinite-sized collections.

    elem

    the element value to search for.

    returns

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

    Definition Classes
    GenSeqLike
    Full Signature

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

  46. def lastIndexWhere(p: (A) ⇒ Boolean): Int

    Finds index of last element satisfying some predicate.

    Finds index of last element satisfying some predicate.

    Note: will not terminate for infinite-sized collections.

    p

    the predicate used to test elements.

    returns

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

    Definition Classes
    GenSeqLike
  47. abstract def map[B](f: (A) ⇒ B): CC[B]

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

    [use case]

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

    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

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

    Definition Classes
    GenTraversableLike
    Full Signature

    abstract def map[B, That](f: (A) ⇒ B)(implicit bf: CanBuildFrom[This, B, That]): That

  48. abstract def max: A

    [use case] Finds the largest element.

    [use case]

    Finds the largest element.

    returns

    the largest element of this collection.

    Definition Classes
    GenTraversableOnce
    Full Signature

    abstract def max[A1 >: A](implicit ord: Ordering[A1]): A

  49. abstract def min: A

    [use case] Finds the smallest element.

    [use case]

    Finds the smallest element.

    returns

    the smallest element of this collection

    Definition Classes
    GenTraversableOnce
    Full Signature

    abstract def min[A1 >: A](implicit ord: Ordering[A1]): A

  50. 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
  51. def newBuilder: Builder[A, GenSeq[A]]

    The builder that builds instances of type CC[A]

    The builder that builds instances of type CC[A]

    Attributes
    protected[this]
    Definition Classes
    GenericTraversableTemplateHasNewBuilder
  52. 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

  53. 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

  54. abstract def padTo(len: Int, elem: A): CC[A]

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

    [use case]

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

    len

    the target length

    elem

    the padding value

    returns

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

    Definition Classes
    GenSeqLike
    Full Signature

    abstract def padTo[B >: A, That](len: Int, elem: B)(implicit bf: CanBuildFrom[This, B, That]): That

  55. def par: ParSeq[A]

    Returns a parallel implementation of this collection.

    Returns a parallel implementation of this collection.

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

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

    All parallel collections return a reference to themselves.

    returns

    a parallel implementation of this collection

    Definition Classes
    Parallelizable
  56. abstract def patch(from: Int, that: GenSeq[A], replaced: Int): CC[A]

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

    [use case]

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

    from

    the index of the first replaced element

    replaced

    the number of elements to drop in the original collection

    returns

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

    Definition Classes
    GenSeqLike
    Full Signature

    abstract def patch[B >: A, That](from: Int, patch: GenSeq[B], replaced: Int)(implicit bf: CanBuildFrom[This, B, That]): That

  57. def prefixLength(p: (A) ⇒ Boolean): Int

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

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

    Note: may not terminate for infinite-sized collections.

    p

    the predicate used to test elements.

    returns

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

    Definition Classes
    GenSeqLike
  58. abstract def product: A

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

    [use case]

    Multiplies up the elements of this collection.

    returns

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

    Definition Classes
    GenTraversableOnce
    Full Signature

    abstract def product[A1 >: A](implicit num: Numeric[A1]): A1

  59. abstract def reverseMap[B](f: (A) ⇒ B): CC[B]

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

    [use case]

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

    Note: will not terminate for infinite-sized collections.

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

    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

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

    Definition Classes
    GenSeqLike
    Full Signature

    abstract def reverseMap[B, That](f: (A) ⇒ B)(implicit bf: CanBuildFrom[This, B, That]): That

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

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

    [use case]

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

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

    Note: will not terminate for infinite-sized collections.

    that

    the collection to compare with.

    returns

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

    Definition Classes
    GenIterableLike
    Full Signature

    abstract def sameElements[A1 >: A](that: GenIterable[A1]): Boolean

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

    Tests whether this collection starts with the given sequence.

    Tests whether this collection 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
  62. abstract def sum: A

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

    [use case]

    Sums up the elements of this collection.

    returns

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

    Definition Classes
    GenTraversableOnce
    Full Signature

    abstract def sum[A1 >: A](implicit num: Numeric[A1]): A1

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

    Definition Classes
    AnyRef
  64. abstract def to[Col[_]]: Col[A]

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

    [use case]

    Converts this collection into another by copying all elements.

    Note: will not terminate for infinite-sized collections.

    Col

    The collection type to build.

    returns

    a new collection containing all elements of this collection.

    Definition Classes
    GenTraversableOnce
    Full Signature

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

  65. abstract def toArray: Array[A]

    [use case] Converts this collection to an array.

    [use case]

    Converts this collection to an array.

    Note: will not terminate for infinite-sized collections.

    returns

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

    Definition Classes
    GenTraversableOnce
    Full Signature

    abstract def toArray[A1 >: A](implicit arg0: ClassTag[A1]): Array[A1]

  66. abstract def toMap[T, U]: Map[T, U]

    [use case] Converts this collection to a map.

    [use case]

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

    Note: will not terminate for infinite-sized collections.

    returns

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

    Definition Classes
    GenTraversableOnce
    Full Signature

    abstract def toMap[K, V](implicit ev: <:<[A, (K, V)]): GenMap[K, V]

  67. def toParArray: ParArray[A]

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  68. 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
    AnyRef → Any
  69. def transpose[B](implicit asTraversable: (A) ⇒ GenTraversableOnce[B]): GenSeq[GenSeq[B]]

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

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

    B

    the type of the elements of each traversable collection.

    asTraversable

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

    returns

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

    Definition Classes
    GenericTraversableTemplate
    Annotations
    @migration
    Migration

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

    Exceptions thrown
    `IllegalArgumentException`

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

  70. def union(that: GenSeq[A]): CC[A]

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

    [use case]

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

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

    that

    the sequence to add.

    returns

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

    Definition Classes
    GenSeqLike
    Full Signature

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

  71. def unzip[A1, A2](implicit asPair: (A) ⇒ (A1, A2)): (GenSeq[A1], GenSeq[A2])

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

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

    A1

    the type of the first half of the element pairs

    A2

    the type of the second half of the element pairs

    asPair

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

    returns

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

    Definition Classes
    GenericTraversableTemplate
  72. def unzip3[A1, A2, A3](implicit asTriple: (A) ⇒ (A1, A2, A3)): (GenSeq[A1], GenSeq[A2], GenSeq[A3])

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

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

    A1

    the type of the first member of the element triples

    A2

    the type of the second member of the element triples

    A3

    the type of the third member of the element triples

    asTriple

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

    returns

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

    Definition Classes
    GenericTraversableTemplate
  73. abstract def updated(index: Int, elem: A): CC[A]

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

    [use case]

    A copy of this collection with one single replaced element.

    index

    the position of the replacement

    elem

    the replacing element

    returns

    a copy of this collection with the element at position index replaced by elem.

    Definition Classes
    GenSeqLike
    Full Signature

    abstract def updated[B >: A, That](index: Int, elem: B)(implicit bf: CanBuildFrom[This, B, That]): That

  74. def viewToString: String

    Definition Classes
    GenTraversableViewLike
  75. final def wait(): Unit

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

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

    Definition Classes
    AnyRef
    Annotations
    @throws()
  78. abstract def zip[B](that: GenIterable[B]): CC[(A, B)]

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

    [use case]

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

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

    B

    the type of the second half of the returned pairs

    that

    The iterable providing the second half of each result pair

    returns

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

    Definition Classes
    GenIterableLike
    Full Signature

    abstract def zip[A1 >: A, B, That](that: GenIterable[B])(implicit bf: CanBuildFrom[This, (A1, B), That]): That

  79. abstract def zipAll[B](that: Iterable[B], thisElem: A, thatElem: B): CC[(A, B)]

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

    [use case]

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

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

    B

    the type of the second half of the returned pairs

    that

    The iterable providing the second half of each result pair

    thisElem

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

    thatElem

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

    returns

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

    Definition Classes
    GenIterableLike
    Full Signature

    abstract def zipAll[B, A1 >: A, That](that: GenIterable[B], thisElem: A1, thatElem: B)(implicit bf: CanBuildFrom[This, (A1, B), That]): That

  80. abstract def zipWithIndex: CC[(A, Int)]

    [use case] Zips this collection with its indices.

    [use case]

    Zips this collection with its indices.

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

    returns

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

    Definition Classes
    GenIterableLike
    Full Signature

    abstract def zipWithIndex[A1 >: A, That](implicit bf: CanBuildFrom[This, (A1, Int), That]): That

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

  81. def [B](y: B): (GenSeqViewLike[A, Coll, This], B)

    Implicit information
    This member is added by an implicit conversion from GenSeqViewLike[A, Coll, This] to ArrowAssoc[GenSeqViewLike[A, Coll, This]] performed by method any2ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Shadowed Implict Value Members

  1. val self: Any

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

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

Deprecated Value Members

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

    A syntactic sugar for out of order folding.

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

    Example:

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

    (Since version 2.10.0) use fold instead

  2. def x: GenSeqViewLike[A, Coll, This]

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

    (Since version 2.10.0) Use leftOfArrow instead

  3. def x: GenSeqViewLike[A, Coll, This]

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

    (Since version 2.10.0) Use resultOfEnsuring instead

Inherited from GenIterableView[A, Coll]

Inherited from GenIterableViewLike[A, Coll, This]

Inherited from GenTraversableView[A, Coll]

Inherited from GenTraversableViewLike[A, Coll, This]

Inherited from GenSeq[A]

Inherited from GenIterable[A]

Inherited from GenTraversable[A]

Inherited from GenericTraversableTemplate[A, GenSeq]

Inherited from HasNewBuilder[A, GenSeq[A]]

Inherited from GenSeqLike[A, This]

Inherited from Equals

Inherited from GenIterableLike[A, This]

Inherited from GenTraversableLike[A, This]

Inherited from Parallelizable[A, ParSeq[A]]

Inherited from GenTraversableOnce[A]

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion traversable2ops from GenSeqViewLike[A, Coll, This] to TraversableOps[A]

Inherited by implicit conversion any2stringadd from GenSeqViewLike[A, Coll, This] to StringAdd

Inherited by implicit conversion any2stringfmt from GenSeqViewLike[A, Coll, This] to StringFormat

Inherited by implicit conversion any2ArrowAssoc from GenSeqViewLike[A, Coll, This] to ArrowAssoc[GenSeqViewLike[A, Coll, This]]

Inherited by implicit conversion any2Ensuring from GenSeqViewLike[A, Coll, This] to Ensuring[GenSeqViewLike[A, Coll, This]]