scala.collection.GenIterableViewLike

FlatMapped

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

Definition Classes
GenIterableViewLikeGenTraversableViewLike
Source
GenIterableViewLike.scala
Linear Supertypes
Known Subclasses
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  1. FlatMapped
  2. Transformed
  3. GenIterableView
  4. GenIterableViewLike
  5. GenIterable
  6. GenIterableLike
  7. FlatMapped
  8. Transformed
  9. GenTraversableView
  10. GenTraversableViewLike
  11. GenTraversable
  12. GenericTraversableTemplate
  13. HasNewBuilder
  14. GenTraversableLike
  15. Parallelizable
  16. GenTraversableOnce
  17. AnyRef
  18. Any
Visibility
  1. Public
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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 Sliced extends Sliced with Transformed[A]

  9. trait TakenWhile extends TakenWhile with Transformed[A]

  10. trait Transformed[+B] extends GenIterableView[B, Coll] with Transformed[B]

    The implementation base trait of this view.

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

  12. trait ZippedAll[A1 >: A, B] extends Transformed[(A1, B)]

Abstract Value Members

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

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

    Applies a binary operator to a start value and all elements of this general iterable 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 general iterable collection , 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 general iterable collection .

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

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

    Applies a binary operator to all elements of this general iterable 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 general iterable collection , 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 general iterable collection .

    Definition Classes
    GenTraversableOnce
  3. abstract 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
    GenTraversableOnce
  4. abstract def copyToArray[B >: B](xs: Array[B], start: Int, len: Int): Unit

    Definition Classes
    GenTraversableOnce
  5. abstract def count(p: (B) ⇒ Boolean): Int

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

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

    p

    the predicate used to test elements.

    returns

    the number of elements satisfying the predicate p.

    Definition Classes
    GenTraversableOnce
  6. abstract def drop(n: Int): GenIterableView[B, Coll]

    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 general iterable collection .

    returns

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

    Definition Classes
    GenTraversableLike
  7. abstract def dropWhile(pred: (B) ⇒ Boolean): GenIterableView[B, Coll]

    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.

    returns

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

    Definition Classes
    GenTraversableLike
  8. abstract def exists(pred: (B) ⇒ Boolean): Boolean

    Definition Classes
    GenTraversableOnce
  9. abstract def filter(pred: (B) ⇒ Boolean): GenIterableView[B, Coll]

    Selects all elements of this general iterable collection which satisfy a predicate.

    Selects all elements of this general iterable collection which satisfy a predicate.

    returns

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

    Definition Classes
    GenTraversableLike
  10. abstract def filterNot(pred: (B) ⇒ Boolean): GenIterableView[B, Coll]

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

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

    returns

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

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

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

    Finds the first element of the general iterable 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.

    returns

    an option value containing the first element in the general iterable collection

    that satisfies p, or None if none exists.

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

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

    Folds the elements of this general iterable 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
  13. abstract def foldLeft[B](z: B)(op: (B, B) ⇒ B): B

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

    Applies a binary operator to a start value and all elements of this general iterable 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 general iterable collection , 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 general iterable collection .

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

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

    Applies a binary operator to all elements of this general iterable 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 general iterable collection , 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 general iterable collection .

    Definition Classes
    GenTraversableOnce
  15. abstract def forall(pred: (B) ⇒ Boolean): Boolean

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

    Definition Classes
    GenTraversableViewLike
  17. abstract def groupBy[K](f: (B) ⇒ K): GenMap[K, GenIterableView[B, Coll]]

    Partitions this general iterable collection into a map of general iterable collection s according to some discriminator function.

    Partitions this general iterable collection into a map of general iterable collection s 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 general iterable collection .

    K

    the type of keys returned by the discriminator function.

    f

    the discriminator function.

    returns

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

    Definition Classes
    GenTraversableLike
  18. abstract def hasDefiniteSize: Boolean

    Definition Classes
    GenTraversableOnce
  19. abstract val mapping: (A) ⇒ GenTraversableOnce[B]

    Attributes
    protected[this]
    Definition Classes
    FlatMapped
  20. abstract def maxBy[B](f: (B) ⇒ B)(implicit cmp: Ordering[B]): B

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

    Definition Classes
    GenTraversableOnce
  22. abstract def mkString: String

    Displays all elements of this general iterable collection in a string.

    Displays all elements of this general iterable collection in a string.

    returns

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

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

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

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

    sep

    the separator string.

    returns

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

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

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

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

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

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

  25. abstract def nonEmpty: Boolean

    Tests whether the general iterable collection is not empty.

    Tests whether the general iterable collection is not empty.

    returns

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

    Definition Classes
    GenTraversableOnce
  26. abstract def parCombiner: Combiner[B, ParIterable[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
    Parallelizable
  27. abstract def partition(pred: (B) ⇒ Boolean): (GenIterableView[B, Coll], GenIterableView[B, Coll])

    Partitions this general iterable collection in two general iterable collection s according to a predicate.

    Partitions this general iterable collection in two general iterable collection s according to a predicate.

    returns

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

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

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

    Reduces the elements of this general iterable 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 general iterable collection is nonempty.

    Definition Classes
    GenTraversableOnce
    Exceptions thrown
    UnsupportedOperationException

    if this general iterable collection is empty.

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

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

    Optionally applies a binary operator to all elements of this general iterable 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 general iterable collection is nonempty, None otherwise.

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

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

    Reduces the elements of this general iterable 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
  31. abstract def reduceRight[B >: B](op: (B, B) ⇒ B): B

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

    Applies a binary operator to all elements of this general iterable 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 general iterable 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 general iterable collection .

    Definition Classes
    GenTraversableOnce
    Exceptions thrown
    `UnsupportedOperationException`

    if this general iterable collection is empty.

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

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

    Optionally applies a binary operator to all elements of this general iterable 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 general iterable collection is nonempty, None otherwise.

    Definition Classes
    GenTraversableOnce
  33. abstract def repr: GenIterableView[B, Coll]

    Definition Classes
    GenTraversableLike
  34. abstract def scan[B >: B, That](z: B)(op: (B, B) ⇒ B)(implicit cbf: CanBuildFrom[GenIterableView[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 general iterable collection containing the prefix scan of the elements in this general iterable collection

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

    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
  36. abstract def scanRight[B, That](z: B)(op: (B, B) ⇒ B)(implicit bf: CanBuildFrom[GenIterableView[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.

    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.

  37. abstract def seq: Iterable[B]

  38. abstract def size: Int

    The size of this general iterable collection .

    The size of this general iterable collection .

    Note: will not terminate for infinite-sized collections.

    returns

    the number of elements in this general iterable collection .

    Definition Classes
    GenTraversableLikeGenTraversableOnce
  39. abstract def slice(unc_from: Int, unc_until: Int): GenIterableView[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
    

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

    returns

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

    Definition Classes
    GenTraversableLike
  40. abstract def span(pred: (B) ⇒ Boolean): (GenIterableView[B, Coll], GenIterableView[B, Coll])

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

    Splits this general iterable 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.

    returns

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

    Definition Classes
    GenTraversableLike
  41. abstract def splitAt(n: Int): (GenIterableView[B, Coll], GenIterableView[B, Coll])

    Splits this general iterable collection into two at a given position.

    Splits this general iterable 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 general iterable collection s consisting of the first n elements of this general iterable collection , and the other elements.

    Definition Classes
    GenTraversableLike
  42. abstract def take(n: Int): GenIterableView[B, Coll]

    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 general iterable collection .

    returns

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

    Definition Classes
    GenTraversableLike
  43. abstract def takeWhile(pred: (B) ⇒ Boolean): GenIterableView[B, Coll]

    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.

    returns

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

    Definition Classes
    GenTraversableLike
  44. abstract def toBuffer[A1 >: B]: Buffer[A1]

    Converts this general iterable collection to a mutable buffer.

    Converts this general iterable collection to a mutable buffer.

    Note: will not terminate for infinite-sized collections.

    returns

    a buffer containing all elements of this general iterable collection .

    Definition Classes
    GenTraversableOnce
  45. abstract def toIndexedSeq: IndexedSeq[B]

    Converts this general iterable collection to an indexed sequence.

    Converts this general iterable collection to an indexed sequence.

    Note: will not terminate for infinite-sized collections.

    returns

    an indexed sequence containing all elements of this general iterable collection .

    Definition Classes
    GenTraversableOnce
  46. abstract def toIterable: GenIterable[B]

    Converts this general iterable collection to an iterable collection.

    Converts this general iterable 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 general iterable collection .

    Definition Classes
    GenTraversableOnce
  47. abstract def toIterator: Iterator[B]

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

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

    Definition Classes
    GenTraversableOnce
  48. abstract def toList: List[B]

    Converts this general iterable collection to a list.

    Converts this general iterable collection to a list.

    Note: will not terminate for infinite-sized collections.

    returns

    a list containing all elements of this general iterable collection .

    Definition Classes
    GenTraversableOnce
  49. abstract def toSeq: GenSeq[B]

    Converts this general iterable collection to a sequence.

    Converts this general iterable 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 general iterable collection .

    Definition Classes
    GenTraversableOnce
  50. abstract def toSet[A1 >: B]: GenSet[A1]

    Converts this general iterable collection to a set.

    Converts this general iterable collection to a set.

    Note: will not terminate for infinite-sized collections.

    returns

    a set containing all elements of this general iterable collection .

    Definition Classes
    GenTraversableOnce
  51. abstract def toStream: Stream[B]

    Converts this general iterable collection to a stream.

    Converts this general iterable collection to a stream.

    Note: will not terminate for infinite-sized collections.

    returns

    a stream containing all elements of this general iterable collection .

    Definition Classes
    GenTraversableOnce
  52. abstract def toTraversable: GenTraversable[B]

    Converts this general iterable collection to an unspecified Traversable.

    Converts this general iterable 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 general iterable collection .

    Definition Classes
    GenTraversableOnce

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. abstract def ++[B](that: GenTraversableOnce[B]): GenIterable[B]

    [use case]

    [use case]
    B

    the element type of the returned collection.

    that

    the traversable to append.

    returns

    a new general iterable collection which contains all elements of this general iterable collection

    followed by all elements of that.

    Definition Classes
    GenTraversableLike
  5. 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
  6. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  7. 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
  8. 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.

  9. 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

  10. abstract def collect[B](pf: PartialFunction[B, B]): GenIterable[B]

    [use case]

    [use case]
    B

    the element type of the returned collection.

    pf

    the partial function which filters and maps the general iterable collection .

    returns

    a new general iterable 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
  11. def companion: GenericCompanion[GenIterable]

    The factory companion object that builds instances of class GenIterable.

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

    Definition Classes
    GenIterableGenTraversableGenericTraversableTemplate
  12. abstract def copyToArray(xs: Array[B], start: Int): Unit

    [use case]

    [use case]
    xs

    the array to fill.

    start

    the starting index.

    Definition Classes
    GenTraversableOnce
  13. abstract def copyToArray(xs: Array[B]): Unit

    [use case]

    [use case]
    xs

    the array to fill.

    Definition Classes
    GenTraversableOnce
  14. 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
  15. def equals(arg0: Any): Boolean

    The equality method for reference types.

    The equality method for reference types. Default implementation delegates to eq.

    See also equals in Any.

    returns

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

    Definition Classes
    AnyRef → Any
  16. 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

  17. abstract def flatMap[B](f: (B) ⇒ GenTraversableOnce[B]): GenIterable[B]

    [use case]

    [use case]
    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

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

    Definition Classes
    GenTraversableLike
  18. def flatten[B]: GenIterable[B]

    [use case]

    [use case]
    B

    the type of the elements of each traversable collection.

    returns

    a new general iterable collection resulting from concatenating all element general iterable collection s.

    Definition Classes
    GenericTraversableTemplate
  19. def foreach(f: (B) ⇒ 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
    TransformedTransformedGenericTraversableTemplateGenTraversableLikeGenTraversableOnce
  20. def genericBuilder[B]: Builder[B, GenIterable[B]]

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

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

    Definition Classes
    GenericTraversableTemplate
  21. 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

  22. def hashCode(): Int

    The hashCode method for reference types.

    The hashCode method for reference types. See hashCode in Any.

    returns

    the hash code value for this object.

    Definition Classes
    AnyRef → Any
  23. def head: B

    Definition Classes
    GenIterableLikeGenTraversableLike
  24. def isEmpty: Boolean

    Tests whether the general iterable collection is empty.

    Tests whether the general iterable collection is empty.

    returns

    true if the general iterable collection contains no elements, false otherwise.

    Definition Classes
    GenIterableLikeGenTraversableOnce
  25. 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
  26. final def isTraversableAgain: Boolean

    Tests whether this general iterable collection can be repeatedly traversed.

    Tests whether this general iterable collection can be repeatedly traversed.

    returns

    true

    Definition Classes
    GenTraversableLikeGenTraversableOnce
  27. def iterator: Iterator[B]

    Definition Classes
    FlatMappedTransformedGenIterableLike
  28. abstract def map[B](f: (B) ⇒ B): GenIterable[B]

    [use case]

    [use case]
    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

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

    Definition Classes
    GenTraversableLike
  29. abstract def max: B

    [use case]

    [use case]
    returns

    the largest element of this general iterable collection .

    Definition Classes
    GenTraversableOnce
  30. abstract def min: B

    [use case]

    [use case]
    returns

    the smallest element of this general iterable collection

    Definition Classes
    GenTraversableOnce
  31. 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
  32. def newBuilder: Builder[B, GenIterable[B]]

    The builder that builds instances of type GenIterable[A]

    The builder that builds instances of type GenIterable[A]

    Attributes
    protected[this]
    Definition Classes
    GenericTraversableTemplateHasNewBuilder
  33. 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

  34. 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

  35. def par: ParIterable[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
  36. abstract def product: B

    [use case]

    [use case]
    returns

    the product of all elements in this general iterable 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 general iterable collection and as result type of product. Examples of such types are: Long, Float, Double, BigInt.

    Definition Classes
    GenTraversableOnce
  37. abstract def sameElements(that: GenIterable[B]): Boolean

    [use case]

    [use case]
    that

    the collection to compare with.

    returns

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

    Definition Classes
    GenIterableLike
  38. 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 general iterable collection . By default the string prefix is the simple name of the collection class general iterable collection .

    Definition Classes
    TransformedGenTraversableLike
  39. abstract def sum: B

    [use case]

    [use case]
    returns

    the sum of all elements in this general iterable 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 general iterable collection and as result type of sum. Examples of such types are: Long, Float, Double, BigInt.

    Definition Classes
    GenTraversableOnce
  40. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  41. def tail: GenIterableView[B, Coll]

    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 general iterable collection consisting of all elements of this general iterable collection

    except the first one.

    Definition Classes
    GenTraversableLike
    Exceptions thrown
    `UnsupportedOperationException`

    if the general iterable collection is empty.

  42. abstract def toArray: Array[B]

    [use case]

    [use case]
    returns

    an array containing all elements of this general iterable collection . A ClassManifest must be available for the element type of this general iterable collection .

    Definition Classes
    GenTraversableOnce
  43. abstract def toMap[T, U]: Map[T, U]

    [use case]

    [use case]
    returns

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

    Definition Classes
    GenTraversableOnce
  44. 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
    TransformedTransformed → AnyRef → Any
  45. def transpose[B](implicit asTraversable: (B) ⇒ GenTraversableOnce[B]): GenIterable[GenIterable[B]]

    Transposes this general iterable collection of traversable collections into a general iterable collection of general iterable collection s.

    Transposes this general iterable collection of traversable collections into a general iterable collection of general iterable collection s.

    B

    the type of the elements of each traversable collection.

    asTraversable

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

    returns

    a two-dimensional general iterable collection of general iterable collection s which has as nth row the nth column of this general iterable 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 general iterable collection

    are not of the same size.

  46. lazy val underlying: Coll

    Definition Classes
    TransformedGenTraversableViewLike
  47. def unzip[A1, A2](implicit asPair: (B) ⇒ (A1, A2)): (GenIterable[A1], GenIterable[A2])

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

    Converts this general iterable collection 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 general iterable collection is a pair.

    returns

    a pair general iterable collection s, containing the first, respectively second half of each element pair of this general iterable collection .

    Definition Classes
    GenericTraversableTemplate
  48. def unzip3[A1, A2, A3](implicit asTriple: (B) ⇒ (A1, A2, A3)): (GenIterable[A1], GenIterable[A2], GenIterable[A3])

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

    Converts this general iterable collection 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 general iterable collection is a triple.

    returns

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

    Definition Classes
    GenericTraversableTemplate
  49. final def viewIdString: String

    Attributes
    protected[this]
    Definition Classes
    TransformedGenTraversableViewLike
  50. final def viewIdentifier: String

    Attributes
    protected[this]
    Definition Classes
    FlatMappedGenTraversableViewLike
  51. def viewToString: String

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

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

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

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

    [use case]

    [use case]
    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 general iterable collection containing pairs consisting of corresponding elements of this general iterable collection and that. The length of the returned collection is the minimum of the lengths of this general iterable collection and that.

    Definition Classes
    GenIterableLike
  56. abstract def zipAll[B](that: Iterable[B], thisElem: B, thatElem: B): GenIterable[(B, B)]

    [use case]

    [use case]
    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 general iterable collection is shorter than that.

    thatElem

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

    returns

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

    Definition Classes
    GenIterableLike
  57. abstract def zipWithIndex: GenIterable[(B, Int)]

    [use case]

    [use case]
    returns

    A new general iterable collection containing pairs consisting of all elements of this general iterable collection paired with their index. Indices start at 0. @example List("a", "b", "c").zipWithIndex = List(("a", 0), ("b", 1), ("c", 2))

    Definition Classes
    GenIterableLike

Inherited from Transformed[B]

Inherited from GenIterableView[B, Coll]

Inherited from GenIterableViewLike[B, Coll, GenIterableView[B, Coll]]

Inherited from GenIterable[B]

Inherited from GenIterableLike[B, GenIterableView[B, Coll]]

Inherited from FlatMapped[B]

Inherited from Transformed[B]

Inherited from GenTraversableView[B, Coll]

Inherited from GenTraversableViewLike[B, Coll, GenIterableView[B, Coll]]

Inherited from GenTraversable[B]

Inherited from HasNewBuilder[B, GenIterable[B]]

Inherited from GenTraversableLike[B, GenIterableView[B, Coll]]

Inherited from Parallelizable[B, ParIterable[B]]

Inherited from GenTraversableOnce[B]

Inherited from AnyRef

Inherited from Any