GenTraversableFactory - Scala Standard Library 2.11.6 - scala.collection.generic.GenTraversableFactory
Keywords: GenTraversableFactory Scala Standard Library 2.11.6 scala.collection.generic.GenTraversableFactory

scala.collection.generic

# GenTraversableFactory

###
Related Doc: package generic

#### abstract class GenTraversableFactory[CC[X] <: GenTraversable[X] with GenericTraversableTemplate[X, CC]] extends GenericCompanion[CC]

A template for companion objects of `Traversable` and subclasses thereof. This class provides a set of operations to create ``Traversable`` objects. It is typically inherited by companion objects of subclasses of `Traversable`.

Source
  GenTraversableFactory.scala
Since

  2.8

Linear Supertypes
GenericCompanion[CC], AnyRef, Any
Known Subclasses
ArrayBuffer, ArraySeq, ArrayStack, Buffer, DoubleLinkedList, GenIterable, GenSeq, GenSeqFactory, GenSet, GenTraversable, IndexedSeq, IndexedSeq, IndexedSeq, IndexedSeqFactory, Iterable, Iterable, Iterable, LinearSeq, LinearSeq, LinearSeq, LinkedList, List, ListBuffer, MutableList, ParArray, ParFactory, ParIterable, ParIterable, ParIterable, ParSeq, ParSeq, ParSeq, ParVector, Queue, Queue, ResizableArray, Seq, Seq, Seq, SeqFactory, Stack, Stack, Stream, Traversable, Traversable, Traversable, TraversableFactory, Vector
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Inherited

1. GenTraversableFactory
2. GenericCompanion
3. AnyRef
4. Any

Implicitly

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

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Visibility

1. Public
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### Instance Constructors

1. #### new GenTraversableFactory()

### Type Members

1. #### type Coll = CC[_]

   The underlying collection type with unknown element type

   The underlying collection type with unknown element type

   Attributes
     protected[this]
   Definition Classes
     GenericCompanion

2. #### class GenericCanBuildFrom[A] extends CanBuildFrom[CC[_], A, CC[A]]

   A generic implementation of the `CanBuildFrom` trait, which forwards all calls to `apply(from)` to the `genericBuilder` method of collection `from`, and which forwards all calls of `apply()` to the `newBuilder` method of this factory.

### Abstract Value Members

1. #### abstract def newBuilder[A]: Builder[A, CC[A]]

   The default builder for ``CC`` objects.

   The default builder for ``CC`` objects.

   A

     the type of the collection's elements

   Definition Classes
     GenericCompanion

### Concrete Value Members

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

   Test two objects for inequality.

   Test two objects for inequality.

   returns

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

   Definition Classes
     AnyRef → Any

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

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

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

   returns

     a hash value consistent with ==

   Definition Classes
     AnyRef → Any

3. #### def +(other: String): String

   Implicit information
     This member is added by an implicit conversion from GenTraversableFactory[CC] to any2stringadd[GenTraversableFactory[CC]] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd

4. #### def ->[B](y: B): (GenTraversableFactory[CC], B)

   Implicit information
     This member is added by an implicit conversion from GenTraversableFactory[CC] to ArrowAssoc[GenTraversableFactory[CC]] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()

5. #### final def ==(arg0: Any): Boolean

   The expression `x == that` is equivalent to `if (x eq null) that eq null else x.equals(that)`.

   The expression `x == that` is equivalent to `if (x eq null) that eq null else x.equals(that)`.

   arg0

     the object to compare against this object for equality.

   returns

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

   Definition Classes
     AnyRef → Any

6. #### def ReusableCBF: GenericCanBuildFrom[Nothing]

7. #### def apply[A](elems: A*): CC[A]

   Creates a collection with the specified elements.

   Creates a collection with the specified elements.

   A

     the type of the collection's elements

   elems

     the elements of the created collection

   returns

     a new collection with elements `elems`

   Definition Classes
     GenericCompanion

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[java.lang]
   Definition Classes
     AnyRef
   Annotations
     @throws( ... )
   Note

     not specified by SLS as a member of AnyRef

10. #### def concat[A](xss: Traversable[A]*): CC[A]

    Concatenates all argument collections into a single collection.

    Concatenates all argument collections into a single collection.

    xss

      the collections that are to be concatenated.

    returns

      the concatenation of all the collections.

11. #### def empty[A]: CC[A]

    An empty collection of type ``CC`[A]`

    An empty collection of type ``CC`[A]`

    A

      the type of the collection's elements

    Definition Classes
      GenericCompanion

12. #### def ensuring(cond: (GenTraversableFactory[CC]) ⇒ Boolean, msg: ⇒ Any): GenTraversableFactory[CC]

    Implicit information
      This member is added by an implicit conversion from GenTraversableFactory[CC] to Ensuring[GenTraversableFactory[CC]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

13. #### def ensuring(cond: (GenTraversableFactory[CC]) ⇒ Boolean): GenTraversableFactory[CC]

    Implicit information
      This member is added by an implicit conversion from GenTraversableFactory[CC] to Ensuring[GenTraversableFactory[CC]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

14. #### def ensuring(cond: Boolean, msg: ⇒ Any): GenTraversableFactory[CC]

    Implicit information
      This member is added by an implicit conversion from GenTraversableFactory[CC] to Ensuring[GenTraversableFactory[CC]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

15. #### def ensuring(cond: Boolean): GenTraversableFactory[CC]

    Implicit information
      This member is added by an implicit conversion from GenTraversableFactory[CC] to Ensuring[GenTraversableFactory[CC]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring

16. #### 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

17. #### 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 scala.Any.

    returns

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

    Definition Classes
      AnyRef → Any

18. #### def fill[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(elem: ⇒ A): CC[CC[CC[CC[CC[A]]]]]

    Produces a five-dimensional collection containing the results of some element computation a number of times.

    Produces a five-dimensional collection containing the results of some element computation a number of times.

    n1

      the number of elements in the 1st dimension

    n2

      the number of elements in the 2nd dimension

    n3

      the number of elements in the 3nd dimension

    n4

      the number of elements in the 4th dimension

    n5

      the number of elements in the 5th dimension

    elem

      the element computation

    returns

      A collection that contains the results of `n1 x n2 x n3 x n4 x n5` evaluations of `elem`.

19. #### def fill[A](n1: Int, n2: Int, n3: Int, n4: Int)(elem: ⇒ A): CC[CC[CC[CC[A]]]]

    Produces a four-dimensional collection containing the results of some element computation a number of times.

    Produces a four-dimensional collection containing the results of some element computation a number of times.

    n1

      the number of elements in the 1st dimension

    n2

      the number of elements in the 2nd dimension

    n3

      the number of elements in the 3nd dimension

    n4

      the number of elements in the 4th dimension

    elem

      the element computation

    returns

      A collection that contains the results of `n1 x n2 x n3 x n4` evaluations of `elem`.

20. #### def fill[A](n1: Int, n2: Int, n3: Int)(elem: ⇒ A): CC[CC[CC[A]]]

    Produces a three-dimensional collection containing the results of some element computation a number of times.

    Produces a three-dimensional collection containing the results of some element computation a number of times.

    n1

      the number of elements in the 1st dimension

    n2

      the number of elements in the 2nd dimension

    n3

      the number of elements in the 3nd dimension

    elem

      the element computation

    returns

      A collection that contains the results of `n1 x n2 x n3` evaluations of `elem`.

21. #### def fill[A](n1: Int, n2: Int)(elem: ⇒ A): CC[CC[A]]

    Produces a two-dimensional collection containing the results of some element computation a number of times.

    Produces a two-dimensional collection containing the results of some element computation a number of times.

    n1

      the number of elements in the 1st dimension

    n2

      the number of elements in the 2nd dimension

    elem

      the element computation

    returns

      A collection that contains the results of `n1 x n2` evaluations of `elem`.

22. #### def fill[A](n: Int)(elem: ⇒ A): CC[A]

    Produces a collection containing the results of some element computation a number of times.

    Produces a collection containing the results of some element computation a number of times.

    n

      the number of elements contained in the collection.

    elem

      the element computation

    returns

      A collection that contains the results of `n` evaluations of `elem`.

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

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

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

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

    Attributes
      protected[java.lang]
    Definition Classes
      AnyRef
    Annotations
      @throws( classOf[java.lang.Throwable] )
    Note

      not specified by SLS as a member of AnyRef

24. #### 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 GenTraversableFactory[CC] to StringFormat[GenTraversableFactory[CC]] performed by method StringFormat in scala.Predef.
    Definition Classes
      StringFormat
    Annotations
      @inline()

25. #### 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

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

    The hashCode method for reference types.

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

    returns

      the hash code value for this object.

    Definition Classes
      AnyRef → Any

27. #### 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

28. #### def iterate[A](start: A, len: Int)(f: (A) ⇒ A): CC[A]

    Produces a collection containing repeated applications of a function to a start value.

    Produces a collection containing repeated applications of a function to a start value.

    start

      the start value of the collection

    len

      the number of elements contained inthe collection

    f

      the function that's repeatedly applied

    returns

      a collection with `len` values in the sequence `start, f(start), f(f(start)), ...`

29. #### 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

30. #### 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

31. #### 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

32. #### def range[T](start: T, end: T, step: T)(implicit arg0: Integral[T]): CC[T]

    Produces a collection containing equally spaced values in some integer interval.

    Produces a collection containing equally spaced values in some integer interval.

    start

      the start value of the collection

    end

      the end value of the collection (the first value NOT contained)

    step

      the difference between successive elements of the collection (must be positive or negative)

    returns

      a collection with values `start, start + step, ...` up to, but excluding `end`

33. #### def range[T](start: T, end: T)(implicit arg0: Integral[T]): CC[T]

    Produces a collection containing a sequence of increasing of integers.

    Produces a collection containing a sequence of increasing of integers.

    start

      the first element of the collection

    end

      the end value of the collection (the first value NOT contained)

    returns

      a collection with values `start, start + 1, ..., end - 1`

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

    Definition Classes
      AnyRef

35. #### def tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(f: (Int, Int, Int, Int, Int) ⇒ A): CC[CC[CC[CC[CC[A]]]]]

    Produces a five-dimensional collection containing values of a given function over ranges of integer values starting from 0.

    Produces a five-dimensional collection containing values of a given function over ranges of integer values starting from 0.

    n1

      the number of elements in the 1st dimension

    n2

      the number of elements in the 2nd dimension

    n3

      the number of elements in the 3nd dimension

    n4

      the number of elements in the 4th dimension

    n5

      the number of elements in the 5th dimension

    f

      The function computing element values

    returns

      A collection consisting of elements `f(i1, i2, i3, i4, i5)` for `0 <= i1 < n1`, `0 <= i2 < n2`, `0 <= i3 < n3`, `0 <= i4 < n4`, and `0 <= i5 < n5`.

36. #### def tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int)(f: (Int, Int, Int, Int) ⇒ A): CC[CC[CC[CC[A]]]]

    Produces a four-dimensional collection containing values of a given function over ranges of integer values starting from 0.

    Produces a four-dimensional collection containing values of a given function over ranges of integer values starting from 0.

    n1

      the number of elements in the 1st dimension

    n2

      the number of elements in the 2nd dimension

    n3

      the number of elements in the 3nd dimension

    n4

      the number of elements in the 4th dimension

    f

      The function computing element values

    returns

      A collection consisting of elements `f(i1, i2, i3, i4)` for `0 <= i1 < n1`, `0 <= i2 < n2`, `0 <= i3 < n3`, and `0 <= i4 < n4`.

37. #### def tabulate[A](n1: Int, n2: Int, n3: Int)(f: (Int, Int, Int) ⇒ A): CC[CC[CC[A]]]

    Produces a three-dimensional collection containing values of a given function over ranges of integer values starting from 0.

    Produces a three-dimensional collection containing values of a given function over ranges of integer values starting from 0.

    n1

      the number of elements in the 1st dimension

    n2

      the number of elements in the 2nd dimension

    n3

      the number of elements in the 3nd dimension

    f

      The function computing element values

    returns

      A collection consisting of elements `f(i1, i2, i3)` for `0 <= i1 < n1`, `0 <= i2 < n2`, and `0 <= i3 < n3`.

38. #### def tabulate[A](n1: Int, n2: Int)(f: (Int, Int) ⇒ A): CC[CC[A]]

    Produces a two-dimensional collection containing values of a given function over ranges of integer values starting from 0.

    Produces a two-dimensional collection containing values of a given function over ranges of integer values starting from 0.

    n1

      the number of elements in the 1st dimension

    n2

      the number of elements in the 2nd dimension

    f

      The function computing element values

    returns

      A collection consisting of elements `f(i1, i2)` for `0 <= i1 < n1` and `0 <= i2 < n2`.

39. #### def tabulate[A](n: Int)(f: (Int) ⇒ A): CC[A]

    Produces a collection containing values of a given function over a range of integer values starting from 0.

    Produces a collection containing values of a given function over a range of integer values starting from 0.

    n

      The number of elements in the collection

    f

      The function computing element values

    returns

      A collection consisting of elements `f(0), ..., f(n -1)`

40. #### def toParArray: ParArray[T]

    Implicit information
      This member is added by an implicit conversion from GenTraversableFactory[CC] to CollectionsHaveToParArray[GenTraversableFactory[CC], T] performed by method CollectionsHaveToParArray in scala.collection.parallel. This conversion will take place only if an implicit value of type (GenTraversableFactory[CC]) ⇒ GenTraversableOnce[T] is in scope.
    Definition Classes
      CollectionsHaveToParArray

41. #### 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

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

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

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

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

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

    Definition Classes
      AnyRef
    Annotations
      @throws( ... )

45. #### def →[B](y: B): (GenTraversableFactory[CC], B)

    Implicit information
      This member is added by an implicit conversion from GenTraversableFactory[CC] to ArrowAssoc[GenTraversableFactory[CC]] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
      ArrowAssoc

### Inherited from GenericCompanion[CC]

### Inherited from AnyRef

### Inherited from Any

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

### Inherited by implicit conversion any2stringadd from GenTraversableFactory[CC] to any2stringadd[GenTraversableFactory[CC]]

### Inherited by implicit conversion StringFormat from GenTraversableFactory[CC] to StringFormat[GenTraversableFactory[CC]]

### Inherited by implicit conversion Ensuring from GenTraversableFactory[CC] to Ensuring[GenTraversableFactory[CC]]

### Inherited by implicit conversion ArrowAssoc from GenTraversableFactory[CC] to ArrowAssoc[GenTraversableFactory[CC]]

### Ungrouped