scala.collection.mutable

# DoubleLinkedListLike

#### trait DoubleLinkedListLike[A, This <: Seq[A] with DoubleLinkedListLike[A, This]] extends SeqLike[A, This] with LinkedListLike[A, This]

This extensible class may be used as a basis for implementing double linked lists. Type variable `A` refers to the element type of the list, type variable `This` is used to model self types of linked lists.

The invariant of this data structure is that `prev` is always a reference to the previous node in the list. If `this` is the first node of the list, `prev` will be `null`. Field `next` is set to `this` iff the list is empty.

Examples (right arrow represents `next`, left arrow represents `prev`, `_` represents no value):

    Empty:

    null <-- [ _ ] --,
             [   ] <-`

    Single element:

    null <-- [ x ] --> [ _ ] --,
             [   ] <-- [   ] <-`

    More elements:

    null <-- [ x ] --> [ y ] --> [ z ] --> [ _ ] --,
             [   ] <-- [   ] <-- [   ] <-- [   ] <-`

A

  type of the elements contained in the double linked list

This

  the type of the actual linked list holding the elements

Self Type
  DoubleLinkedListLike[A, This]
Source
  DoubleLinkedListLike.scala
Version

  1.0, 08/07/2003

Since

  2.8

Linear Supertypes
LinkedListLike[A, This], SeqLike[A, This], Cloneable[This], scala.Cloneable, java.lang.Cloneable, collection.SeqLike[A, This], GenSeqLike[A, This], IterableLike[A, This], GenIterableLike[A, This], TraversableLike[A, This], GenTraversableLike[A, This], Parallelizable[A, ParSeq[A]], TraversableOnce[A], GenTraversableOnce[A], FilterMonadic[A, This], HasNewBuilder[A, This], Equals, AnyRef, Any
Known Subclasses
DoubleLinkedList
Type Hierarchy Learn more about scaladoc diagrams
Ordering

1. Alphabetic
2. By inheritance

Inherited

1. DoubleLinkedListLike
2. LinkedListLike
3. SeqLike
4. Cloneable
5. Cloneable
6. Cloneable
7. SeqLike
8. GenSeqLike
9. IterableLike
10. GenIterableLike
11. TraversableLike
12. GenTraversableLike
13. Parallelizable
14. TraversableOnce
15. GenTraversableOnce
16. FilterMonadic
17. HasNewBuilder
18. Equals
19. AnyRef
20. Any

Implicitly

1. by traversable2ops
2. by MonadOps
3. by any2stringadd
4. by any2stringfmt
5. by any2ArrowAssoc
6. by any2Ensuring
7. by alternateImplicit

1. Hide All
2. Show all

Learn more about member selection
Visibility

1. Public
2. All

### Type Members

1. #### type Self = This

   The type implementing this traversable

   The type implementing this traversable

   Attributes
     protected
   Definition Classes
     TraversableLike

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

   A class supporting filtered operations.

### Abstract Value Members

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

   Creates a new builder for this collection type.

   Creates a new builder for this collection type.

   Attributes
     protected[this]
   Definition Classes
     TraversableLike → HasNewBuilder

2. #### abstract def seq: collection.Seq[A]

   Definition Classes
     GenSeqLike → Parallelizable → 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. #### def +(other: String): String

   Implicit information
     This member is added by an implicit conversion from DoubleLinkedListLike[A, This] to StringAdd performed by method any2stringadd in scala.Predef.
   Definition Classes
     StringAdd

5. #### def ++[B](that: GenTraversableOnce[B]): DoubleLinkedList[B]

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

   [use case]

   Returns a new double linked list containing the elements from the left hand operand followed by the elements from the right hand operand. The element type of the double linked list 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 double linked list which contains all elements of this double linked list followed by all elements of `that`.

   Definition Classes
     TraversableLike → GenTraversableLike
   Full Signature

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

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

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

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

   It differs from `++` in that the right operand determines the type of the resulting collection rather than the left one. Mnemonic: the COLon is on the side of the new COLlection type.

   Example:

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

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

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

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

   Since `TraversableOnce` has no `++` method, we have to implement that directly, but `Traversable` and down can use the overload.

   B

     the element type of the returned collection.

   That

     the class of the returned collection. Where possible, `That` is the same class as the current collection class `Repr`, but this depends on the element type `B` being admissible for that class, which means that an implicit instance of type `CanBuildFrom[Repr, B, That]` is found.

   that

     the traversable to append.

   bf

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

   returns

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

   Definition Classes
     TraversableLike

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

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

   [use case]

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

   It differs from `++` in that the right operand determines the type of the resulting collection rather than the left one. Mnemonic: the COLon is on the side of the new COLlection type.

   Example:

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

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

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

   B

     the element type of the returned collection.

   that

     the traversable to append.

   returns

     a new double linked list which contains all elements of this double linked list followed by all elements of `that`.

   Definition Classes
     TraversableLike
   Full Signature

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

8. #### def +:(elem: A): DoubleLinkedList[A]

   [use case] A copy of the double linked list with an element prepended.

   [use case]

   A copy of the double linked list 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 double linked list 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 double linked list consisting of `elem` followed by all elements of this double linked list.

   Definition Classes
     SeqLike → GenSeqLike
   Full Signature

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

9. #### def ->[B](y: B): (DoubleLinkedListLike[A, This], B)

   Implicit information
     This member is added by an implicit conversion from DoubleLinkedListLike[A, This] to ArrowAssoc[DoubleLinkedListLike[A, This]] performed by method any2ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()

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

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

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

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

    Examples:

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

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

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

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

    Note: will not terminate for infinite-sized collections.

    B

      the result type of the binary operator.

    z

      the start value.

    op

      the binary operator.

    returns

      the result of inserting `op` between consecutive elements of this double linked list, 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 double linked list.

    Definition Classes
      TraversableOnce → GenTraversableOnce

11. #### def :+(elem: A): DoubleLinkedList[A]

    [use case] A copy of this double linked list with an element appended.

    [use case]

    A copy of this double linked list 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 double linked list consisting of all elements of this double linked list followed by `elem`.

    Definition Classes
      SeqLike → GenSeqLike
    Full Signature

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

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

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

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

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

    Note: will not terminate for infinite-sized collections.

    Examples:

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

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

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

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

    B

      the result type of the binary operator.

    z

      the start value

    op

      the binary operator

    returns

      the result of inserting `op` between consecutive elements of this double linked list, 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 double linked list.

    Definition Classes
      TraversableOnce → GenTraversableOnce

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

    Definition Classes
      AnyRef

14. #### 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

15. #### def addString(b: scala.StringBuilder): scala.StringBuilder

    Appends all elements of this double linked list to a string builder.

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

    Example:

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

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

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

    b

      the string builder to which elements are appended.

    returns

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

    Definition Classes
      TraversableOnce

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

    Appends all elements of this double linked list to a string builder using a separator string.

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

    Example:

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

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

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

    b

      the string builder to which elements are appended.

    sep

      the separator string.

    returns

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

    Definition Classes
      TraversableOnce

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

    Appends all elements of this double linked list to a string builder using start, end, and separator strings.

    Appends all elements of this double linked list to a string builder using start, end, and separator strings. The written text 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 double linked list are separated by the string `sep`.

    Example:

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

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

        scala> a.addString(b, "LinkedList(", ", ", ")")
        res1: StringBuilder = LinkedList(1, 2, 3, 4)

    b

      the string builder to which elements are appended.

    start

      the starting string.

    sep

      the separator string.

    end

      the ending string.

    returns

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

    Definition Classes
      TraversableOnce

18. #### 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
      TraversableOnce → GenTraversableOnce

19. #### def append(that: This): This

    If `this` is empty then it does nothing and returns `that`.

    If `this` is empty then it does nothing and returns `that`. Otherwise, appends `that` to `this`. The append requires a full traversal of `this`.

    Examples:

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

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

        scala> a.append(b)
        res0: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 1, 2)

        scala> println(a)
        LinkedList(1, 2, 1, 2)

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

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

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

        scala> println(a)
        LinkedList()

    returns

      the list after append (this is the list itself if nonempty, or list `that` if list this is empty. )

    Definition Classes
      DoubleLinkedListLike → LinkedListLike

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

    Selects an element by its index in the double linked list.

    Selects an element by its index in the double linked list.

    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

    returns

      the element of this double linked list at index `idx`, where `0` indicates the first element.

    Definition Classes
      DoubleLinkedListLike → LinkedListLike → SeqLike → GenSeqLike
    Exceptions thrown
      `IndexOutOfBoundsException`

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

21. #### 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`.

22. #### def asParIterable: ParIterable[A]

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

23. #### def asParSeq: ParSeq[A]

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

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

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

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

    that

      The object with which this double linked list should be compared

    returns

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

    Definition Classes
      IterableLike → Equals

25. #### def clone(): This

    Return a clone of this list.

    Return a clone of this list.

    returns

      a `LinkedList` with the same elements.

    Definition Classes
      LinkedListLike → Cloneable → AnyRef

26. #### def collect[B](pf: PartialFunction[A, B]): DoubleLinkedList[B]

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

    [use case]

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

    B

      the element type of the returned collection.

    pf

      the partial function which filters and maps the double linked list.

    returns

      a new double linked list 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
      TraversableLike → GenTraversableLike
    Full Signature

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

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

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

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

    Note: may not terminate for infinite-sized collections.

    pf

      the partial function

    returns

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

    Definition Classes
      TraversableOnce
    Example:

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

28. #### def combinations(n: Int): Iterator[This]

    Iterates over combinations.

    Iterates over combinations.

    returns

      An Iterator which traverses the possible n-element combinations of this double linked list.

    Definition Classes
      SeqLike
    Example:

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

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

    Tests whether this double linked list contains a given value as an element.

    Tests whether this double linked list contains a given value as an element.

    Note: may not terminate for infinite-sized collections.

    elem

      the element to test.

    returns

      `true` if this double linked list has an element that is equal (as determined by `==`) to `elem`, `false` otherwise.

    Definition Classes
      SeqLike

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

    Tests whether this double linked list contains a given sequence as a slice.

    Tests whether this double linked list contains a given sequence as a slice.

    Note: may not terminate for infinite-sized collections.

    that

      the sequence to test

    returns

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

    Definition Classes
      SeqLike

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

    [use case] Copies elements of this double linked list to an array.

    [use case]

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

    Note: will not terminate for infinite-sized collections.

    xs

      the array to fill.

    start

      the starting index.

    len

      the maximal number of elements to copy.

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
    Full Signature

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

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

    [use case] Copies values of this double linked list to an array.

    [use case]

    Copies values of this double linked list to an array. Fills the given array `xs` with values of this double linked list. Copying will stop once either the end of the current double linked list 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
      TraversableOnce → GenTraversableOnce
    Full Signature

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

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

    [use case] Copies values of this double linked list to an array.

    [use case]

    Copies values of this double linked list to an array. Fills the given array `xs` with values of this double linked list, beginning at index `start`. Copying will stop once either the end of the current double linked list 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
      TraversableOnce → GenTraversableOnce
    Full Signature

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

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

    Copies all elements of this double linked list to a buffer.

    Copies all elements of this double linked list to a buffer.

    Note: will not terminate for infinite-sized collections.

    dest

      The buffer to which elements are copied.

    Definition Classes
      TraversableOnce

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

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

    Tests whether every element of this double linked list 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 double linked list and `y` of `that`, otherwise `false`.

    Definition Classes
      SeqLike → GenSeqLike

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

    Counts the number of elements in the double linked list which satisfy a predicate.

    Counts the number of elements in the double linked list which satisfy a predicate.

    p

      the predicate used to test elements.

    returns

      the number of elements satisfying the predicate `p`.

    Definition Classes
      TraversableOnce → GenTraversableOnce

37. #### def diff(that: collection.Seq[A]): DoubleLinkedList[A]

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

    [use case]

    Computes the multiset difference between this double linked list and another sequence.

    Note: will not terminate for infinite-sized collections.

    that

      the sequence of elements to remove

    returns

      a new double linked list which contains all elements of this double linked list except some of occurrences of elements that also appear in `that`. If an element value `x` appears n times in `that`, then the first n occurrences of `x` will not form part of the result, but any following occurrences will.

    Definition Classes
      SeqLike → GenSeqLike
    Full Signature

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

38. #### def distinct: This

    Builds a new double linked list from this double linked list without any duplicate elements.

    Builds a new double linked list from this double linked list without any duplicate elements.

    Note: will not terminate for infinite-sized collections.

    returns

      A new double linked list which contains the first occurrence of every element of this double linked list.

    Definition Classes
      SeqLike → GenSeqLike

39. #### def drop(n: Int): This

    Selects all elements except first n ones.

    Selects all elements except first n ones.

    n

      the number of elements to drop from this double linked list.

    returns

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

    Definition Classes
      DoubleLinkedListLike → LinkedListLike → IterableLike → TraversableLike → GenTraversableLike

40. #### def dropRight(n: Int): This

    Selects all elements except last n ones.

    Selects all elements except last n ones.

    n

      The number of elements to take

    returns

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

    Definition Classes
      IterableLike

41. #### def dropWhile(p: (A) ⇒ Boolean): This

    Drops longest prefix of elements that satisfy a predicate.

    Drops longest prefix of elements that satisfy a predicate.

    returns

      the longest suffix of this double linked list whose first element does not satisfy the predicate `p`.

    Definition Classes
      TraversableLike → GenTraversableLike

42. #### var elem: A

    Definition Classes
      LinkedListLike

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

    Tests whether this double linked list ends with the given sequence.

    Tests whether this double linked list ends with the given sequence.

    Note: will not terminate for infinite-sized collections.

    that

      the sequence to test

    returns

      `true` if this double linked list has `that` as a suffix, `false` otherwise.

    Definition Classes
      SeqLike → GenSeqLike

44. #### def ensuring(cond: (DoubleLinkedListLike[A, This]) ⇒ Boolean, msg: ⇒ Any): DoubleLinkedListLike[A, This]

    Implicit information
      This member is added by an implicit conversion from DoubleLinkedListLike[A, This] to Ensuring[DoubleLinkedListLike[A, This]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
      Ensuring

45. #### def ensuring(cond: (DoubleLinkedListLike[A, This]) ⇒ Boolean): DoubleLinkedListLike[A, This]

    Implicit information
      This member is added by an implicit conversion from DoubleLinkedListLike[A, This] to Ensuring[DoubleLinkedListLike[A, This]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
      Ensuring

46. #### def ensuring(cond: Boolean, msg: ⇒ Any): DoubleLinkedListLike[A, This]

    Implicit information
      This member is added by an implicit conversion from DoubleLinkedListLike[A, This] to Ensuring[DoubleLinkedListLike[A, This]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
      Ensuring

47. #### def ensuring(cond: Boolean): DoubleLinkedListLike[A, This]

    Implicit information
      This member is added by an implicit conversion from DoubleLinkedListLike[A, This] to Ensuring[DoubleLinkedListLike[A, This]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
      Ensuring

48. #### 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

49. #### def equals(that: Any): Boolean

    The equals method for arbitrary sequences.

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

    that

      The object to compare the sequence to

    returns

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

    Definition Classes
      GenSeqLike → Equals → Any

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

    Tests whether a predicate holds for some of the elements of this double linked list.

    Tests whether a predicate holds for some of the elements of this double linked list.

    Note: may not terminate for infinite-sized collections.

    p

      the predicate used to test elements.

    returns

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

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

51. #### def filter(p: (A) ⇒ Boolean): This

    Selects all elements of this double linked list which satisfy a predicate.

    Selects all elements of this double linked list which satisfy a predicate.

    p

      the predicate used to test elements.

    returns

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

    Definition Classes
      TraversableLike → GenTraversableLike

52. #### def filterNot(p: (A) ⇒ Boolean): This

    Selects all elements of this double linked list which do not satisfy a predicate.

    Selects all elements of this double linked list which do not satisfy a predicate.

    p

      the predicate used to test elements.

    returns

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

    Definition Classes
      TraversableLike → GenTraversableLike

53. #### 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()
    Note

      not specified by SLS as a member of AnyRef

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

    Finds the first element of the double linked list satisfying a predicate, if any.

    Finds the first element of the double linked list satisfying a predicate, if any.

    Note: may not terminate for infinite-sized collections.

    p

      the predicate used to test elements.

    returns

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

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

55. #### def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): DoubleLinkedList[B]

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

    [use case]

    Builds a new collection by applying a function to all elements of this double linked list 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 double linked list. 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 double linked list resulting from applying the given collection-valued function `f` to each element of this double linked list and concatenating the results.

    Definition Classes
      TraversableLike → GenTraversableLike → FilterMonadic
    Full Signature

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

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

    Folds the elements of this double linked list using the specified associative binary operator.

    Folds the elements of this double linked list using the specified associative binary operator.

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

    A1

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

    z

      a neutral element for the fold operation; may be added to the result an arbitrary number of times, and must not change the result (e.g., `Nil` for list concatenation, 0 for addition, or 1 for multiplication.)

    op

      a binary operator that must be associative

    returns

      the result of applying fold operator `op` between all the elements and `z`

    Definition Classes
      TraversableOnce → GenTraversableOnce

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

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

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

    Note: will not terminate for infinite-sized collections.

    B

      the result type of the binary operator.

    z

      the start value.

    op

      the binary operator.

    returns

      the result of inserting `op` between consecutive elements of this double linked list, 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 double linked list.

    Definition Classes
      TraversableOnce → GenTraversableOnce

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

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

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

    Note: will not terminate for infinite-sized collections.

    B

      the result type of the binary operator.

    z

      the start value.

    op

      the binary operator.

    returns

      the result of inserting `op` between consecutive elements of this double linked list, 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 double linked list.

    Definition Classes
      IterableLike → TraversableOnce → GenTraversableOnce

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

    Tests whether a predicate holds for all elements of this double linked list.

    Tests whether a predicate holds for all elements of this double linked list.

    Note: may not terminate for infinite-sized collections.

    p

      the predicate used to test elements.

    returns

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

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

60. #### def foreach(f: (A) ⇒ Unit): Unit

    [use case] Applies a function `f` to all elements of this double linked list.

    [use case]

    Applies a function `f` to all elements of this double linked list.

    Note: this method underlies the implementation of most other bulk operations. Subclasses should re-implement this method if a more efficient implementation exists.

    f

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

    Definition Classes
      LinkedListLike → IterableLike → TraversableLike → GenTraversableLike → TraversableOnce → GenTraversableOnce → FilterMonadic
    Full Signature

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

61. #### 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 DoubleLinkedListLike[A, This] to StringFormat performed by method any2stringfmt in scala.Predef.
    Definition Classes
      StringFormat
    Annotations
      @inline()

62. #### def get(n: Int): Option[A]

    Definition Classes
      DoubleLinkedListLike → LinkedListLike

63. #### 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

64. #### def groupBy[K](f: (A) ⇒ K): immutable.Map[K, This]

    Partitions this double linked list into a map of double linked lists according to some discriminator function.

    Partitions this double linked list into a map of double linked lists 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 double linked list.

    K

      the type of keys returned by the discriminator function.

    f

      the discriminator function.

    returns

      A map from keys to double linked lists 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 double linked list of those elements `x` for which `f(x)` equals `k`.

    Definition Classes
      TraversableLike → GenTraversableLike

65. #### def grouped(size: Int): Iterator[This]

    Partitions elements in fixed size double linked lists.

    Partitions elements in fixed size double linked lists.

    size

      the number of elements per group

    returns

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

    Definition Classes
      IterableLike
    See also

      scala.collection.Iterator, method `grouped`

66. #### def hasDefiniteSize: Boolean

    Tests whether this double linked list is known to have a finite size.

    Tests whether this double linked list is known to have a finite size. All strict collections are known to have finite size. For a non-strict collection such as `Stream`, the predicate returns `true` if all elements have been computed. It returns `false` if the stream is not yet evaluated to the end.

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

    returns

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

    Definition Classes
      TraversableLike → TraversableOnce → GenTraversableOnce

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

    Hashcodes for `DoubleLinkedList` produce a value from the hashcodes of all the elements of the double linked list.

    Hashcodes for `DoubleLinkedList` produce a value from the hashcodes of all the elements of the double linked list.

    returns

      the hash code value for this object.

    Definition Classes
      GenSeqLike → Any

68. #### def head: A

    Selects the first element of this double linked list.

    Selects the first element of this double linked list.

    returns

      the first element of this double linked list.

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

      if the double linked list is empty.

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

    Optionally selects the first element.

    Optionally selects the first element.

    returns

      the first element of this double linked list if it is nonempty, `None` if it is empty.

    Definition Classes
      TraversableLike → GenTraversableLike

70. #### def ifParSeq[R](isbody: (ParSeq[A]) ⇒ R): (TraversableOps[A])#Otherwise[R]

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

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

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

    [use case]

    Finds index of first occurrence of some value in this double linked list 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 double linked list that is equal (as determined by `==`) to `elem`, or `-1`, if none exists.

    Definition Classes
      GenSeqLike
    Full Signature

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

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

    [use case] Finds index of first occurrence of some value in this double linked list.

    [use case]

    Finds index of first occurrence of some value in this double linked list.

    Note: may not terminate for infinite-sized collections.

    elem

      the element value to search for.

    returns

      the index of the first element of this double linked list that is equal (as determined by `==`) to `elem`, or `-1`, if none exists.

    Definition Classes
      GenSeqLike
    Full Signature

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

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

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

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

    Note: may not terminate for infinite-sized collections.

    that

      the sequence to test

    from

      the start index

    returns

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

    Definition Classes
      SeqLike

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

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

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

    Note: may not terminate for infinite-sized collections.

    that

      the sequence to test

    returns

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

    Definition Classes
      SeqLike

75. #### 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 double linked list that satisfies the predicate `p`, or `-1`, if none exists.

    Definition Classes
      SeqLike → GenSeqLike

76. #### 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 double linked list that satisfies the predicate `p`, or `-1`, if none exists.

    Definition Classes
      GenSeqLike

77. #### def indices: immutable.Range

    Produces the range of all indices of this sequence.

    Produces the range of all indices of this sequence.

    returns

      a `Range` value from `0` to one less than the length of this double linked list.

    Definition Classes
      SeqLike

78. #### def init: This

    Selects all elements except the last.

    Selects all elements except the last.

    returns

      a double linked list consisting of all elements of this double linked list except the last one.

    Definition Classes
      TraversableLike → GenTraversableLike
    Exceptions thrown
      `UnsupportedOperationException`

      if the double linked list is empty.

79. #### def inits: Iterator[This]

    Iterates over the inits of this double linked list.

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

    returns

      an iterator over all the inits of this double linked list

    Definition Classes
      TraversableLike
    Example:

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

80. #### def insert(that: This): Unit

    Insert linked list `that` at current position of this linked list

    Insert linked list `that` at current position of this linked list

    Definition Classes
      DoubleLinkedListLike → LinkedListLike
    Note

      this linked list must not be empty

81. #### def intersect(that: collection.Seq[A]): DoubleLinkedList[A]

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

    [use case]

    Computes the multiset intersection between this double linked list and another sequence.

    Note: may not terminate for infinite-sized collections.

    that

      the sequence of elements to intersect with.

    returns

      a new double linked list which contains all elements of this double linked list which also appear in `that`. If an element value `x` appears n times in `that`, then the first n occurrences of `x` will be retained in the result, but any following occurrences will be omitted.

    Definition Classes
      SeqLike → GenSeqLike
    Full Signature

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

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

    Tests whether this double linked list contains given index.

    Tests whether this double linked list 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 double linked list contains an element at position `idx`, `false` otherwise.

    Definition Classes
      GenSeqLike

83. #### def isEmpty: Boolean

    Tests whether this double linked list is empty.

    Tests whether this double linked list is empty.

    returns

      `true` if the double linked list contain no elements, `false` otherwise.

    Definition Classes
      LinkedListLike → SeqLike → IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

84. #### 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

85. #### def isParIterable: Boolean

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

86. #### def isParSeq: Boolean

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

87. #### def isParallel: Boolean

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

88. #### final def isTraversableAgain: Boolean

    Tests whether this double linked list can be repeatedly traversed.

    Tests whether this double linked list can be repeatedly traversed.

    returns

      `true`

    Definition Classes
      TraversableLike → GenTraversableLike → GenTraversableOnce

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

    Creates a new iterator over all elements contained in this iterable object.

    Creates a new iterator over all elements contained in this iterable object.

    returns

      the new iterator

    Definition Classes
      LinkedListLike → IterableLike → GenIterableLike

90. #### def last: A

    Selects the last element.

    Selects the last element.

    returns

      The last element of this double linked list.

    Definition Classes
      TraversableLike → GenTraversableLike
    Exceptions thrown
      NoSuchElementException

      If the double linked list is empty.

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

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

    [use case]

    Finds index of last occurrence of some value in this double linked list 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 double linked list that is equal (as determined by `==`) to `elem`, or `-1`, if none exists.

    Definition Classes
      GenSeqLike
    Full Signature

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

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

    [use case] Finds index of last occurrence of some value in this double linked list.

    [use case]

    Finds index of last occurrence of some value in this double linked list.

    Note: will not terminate for infinite-sized collections.

    elem

      the element value to search for.

    returns

      the index of the last element of this double linked list that is equal (as determined by `==`) to `elem`, or `-1`, if none exists.

    Definition Classes
      GenSeqLike
    Full Signature

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

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

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

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

    that

      the sequence to test

    end

      the end index

    returns

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

    Definition Classes
      SeqLike

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

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

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

    Note: will not terminate for infinite-sized collections.

    that

      the sequence to test

    returns

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

    Definition Classes
      SeqLike

95. #### 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 double linked list that satisfies the predicate `p`, or `-1`, if none exists.

    Definition Classes
      SeqLike → GenSeqLike

96. #### 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 double linked list that satisfies the predicate `p`, or `-1`, if none exists.

    Definition Classes
      GenSeqLike

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

    Optionally selects the last element.

    Optionally selects the last element.

    returns

      the last element of this double linked list$ if it is nonempty, `None` if it is empty.

    Definition Classes
      TraversableLike → GenTraversableLike

98. #### def length: Int

    Determines the length of this double linked list by traversing and counting every node.

    Determines the length of this double linked list by traversing and counting every node.

    returns

      the number of elements in this double linked list.

    Definition Classes
      LinkedListLike → SeqLike → GenSeqLike

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

    Compares the length of this double linked list to a test value.

    Compares the length of this double linked list to a test value.

    len

      the test value that gets compared with the length.

    returns

      A value `x` where

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

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

    Definition Classes
      SeqLike

100. #### def map[B](f: (A) ⇒ B): DoubleLinkedList[B]

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

     [use case]

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

     B

       the element type of the returned collection.

     f

       the function to apply to each element.

     returns

       a new double linked list resulting from applying the given function `f` to each element of this double linked list and collecting the results.

     Definition Classes
       TraversableLike → GenTraversableLike → FilterMonadic
     Full Signature

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

101. #### def max: A

     [use case] Finds the largest element.

     [use case]

     Finds the largest element.

     returns

       the largest element of this double linked list.

     Definition Classes
       TraversableOnce → GenTraversableOnce
     Full Signature

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

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

103. #### def min: A

     [use case] Finds the smallest element.

     [use case]

     Finds the smallest element.

     returns

       the smallest element of this double linked list

     Definition Classes
       TraversableOnce → GenTraversableOnce
     Full Signature

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

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

105. #### def mkString: String

     Displays all elements of this double linked list in a string.

     Displays all elements of this double linked list in a string.

     returns

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

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

     Displays all elements of this double linked list in a string using a separator string.

     Displays all elements of this double linked list in a string using a separator string.

     sep

       the separator string.

     returns

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

     Definition Classes
       TraversableOnce → GenTraversableOnce
     Example:

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

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

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

     Displays all elements of this double linked list 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 double linked list. 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 double linked list are separated by the string `sep`.

     Definition Classes
       TraversableOnce → GenTraversableOnce
     Example:

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

108. #### 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

109. #### var next: This

     Definition Classes
       LinkedListLike

110. #### def nonEmpty: Boolean

     Tests whether the double linked list is not empty.

     Tests whether the double linked list is not empty.

     returns

       `true` if the double linked list contains at least one element, `false` otherwise.

     Definition Classes
       TraversableOnce → GenTraversableOnce

111. #### 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

112. #### 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

113. #### def padTo(len: Int, elem: A): DoubleLinkedList[A]

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

     [use case]

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

     len

       the target length

     elem

       the padding value

     returns

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

     Definition Classes
       SeqLike → GenSeqLike
     Full Signature

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

114. #### 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

115. #### 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
       SeqLike → SeqLike → TraversableLike → Parallelizable

116. #### def partition(p: (A) ⇒ Boolean): (This, This)

     Partitions this double linked list in two double linked lists according to a predicate.

     Partitions this double linked list in two double linked lists according to a predicate.

     p

       the predicate on which to partition.

     returns

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

     Definition Classes
       TraversableLike → GenTraversableLike

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

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

     [use case]

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

     from

       the index of the first replaced element

     replaced

       the number of elements to drop in the original double linked list

     returns

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

     Definition Classes
       SeqLike → GenSeqLike
     Full Signature

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

118. #### def permutations: Iterator[This]

     Iterates over distinct permutations.

     Iterates over distinct permutations.

     returns

       An Iterator which traverses the distinct permutations of this double linked list.

     Definition Classes
       SeqLike
     Example:

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

119. #### 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 double linked list such that every element of the segment satisfies the predicate `p`.

     Definition Classes
       GenSeqLike

120. #### var prev: This

     A reference to the node in the linked list preceeding the current node.

121. #### 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 double linked list 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 double linked list and as result type of `product`. Examples of such types are: `Long`, `Float`, `Double`, `BigInt`.

     Definition Classes
       TraversableOnce → GenTraversableOnce
     Full Signature

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

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

     Reduces the elements of this double linked list using the specified associative binary operator.

     Reduces the elements of this double linked list 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 double linked list is nonempty.

     Definition Classes
       TraversableOnce → GenTraversableOnce
     Exceptions thrown
       UnsupportedOperationException

       if this double linked list is empty.

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

     Applies a binary operator to all elements of this double linked list, going left to right.

     Applies a binary operator to all elements of this double linked list, going left to right.

     Note: will not terminate for infinite-sized collections.

     B

       the result type of the binary operator.

     op

       the binary operator.

     returns

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

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

       where `x1, ..., xn` are the elements of this double linked list.

     Definition Classes
       TraversableOnce
     Exceptions thrown
       `UnsupportedOperationException`

       if this double linked list is empty.

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

     Optionally applies a binary operator to all elements of this double linked list, going left to right.

     Optionally applies a binary operator to all elements of this double linked list, going left to right.

     Note: will not terminate for infinite-sized collections.

     B

       the result type of the binary operator.

     op

       the binary operator.

     returns

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

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

     Reduces the elements of this double linked list, if any, using the specified associative binary operator.

     Reduces the elements of this double linked list, if any, using the specified associative binary operator.

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

     A1

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

     op

       A binary operator that must be associative.

     returns

       An option value containing result of applying reduce operator `op` between all the elements if the collection is nonempty, and `None` otherwise.

     Definition Classes
       TraversableOnce → GenTraversableOnce

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

     Applies a binary operator to all elements of this double linked list, going right to left.

     Applies a binary operator to all elements of this double linked list, going right to left.

     Note: will not terminate for infinite-sized collections.

     B

       the result type of the binary operator.

     op

       the binary operator.

     returns

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

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

       where `x1, ..., xn` are the elements of this double linked list.

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

       if this double linked list is empty.

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

     Optionally applies a binary operator to all elements of this double linked list, going right to left.

     Optionally applies a binary operator to all elements of this double linked list, going right to left.

     Note: will not terminate for infinite-sized collections.

     B

       the result type of the binary operator.

     op

       the binary operator.

     returns

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

128. #### def remove(): Unit

     Removes the current node from the double linked list.

     Removes the current node from the double linked list. If the node was chained into a double linked list, it will no longer be a part of it. If the node was the last node in the list, i.e. a sentinel, this method does nothing.

     Note: this method will not set the fields `elem`, `next` or `prev` of the current node, i.e. `this` node itself will still point "into" the list it was in.

     Annotations
       @migration
     Migration

       (Changed in version 2.9.0) Double linked list now removes the current node from the list.

129. #### def repr: This

     The collection of type double linked list underlying this `TraversableLike` object.

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

     Definition Classes
       TraversableLike → GenTraversableLike

130. #### def reverse: This

     Returns new double linked list wih elements in reversed order.

     Returns new double linked list wih elements in reversed order.

     Note: will not terminate for infinite-sized collections.

     returns

       A new double linked list with all elements of this double linked list in reversed order.

     Definition Classes
       SeqLike → GenSeqLike

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

     An iterator yielding elements in reversed order.

     An iterator yielding elements in reversed order.

     Note: will not terminate for infinite-sized collections.

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

     returns

       an iterator yielding the elements of this double linked list in reversed order

     Definition Classes
       SeqLike

132. #### def reverseMap[B](f: (A) ⇒ B): DoubleLinkedList[B]

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

     [use case]

     Builds a new collection by applying a function to all elements of this double linked list 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 double linked list resulting from applying the given function `f` to each element of this double linked list and collecting the results in reversed order.

     Definition Classes
       SeqLike → GenSeqLike
     Full Signature

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

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

     Attributes
       protected[this]
     Definition Classes
       TraversableOnce

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

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

     [use case]

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

     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
       IterableLike → GenIterableLike
     Full Signature

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

135. #### 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 double linked list containing the prefix scan of the elements in this double linked list

     Definition Classes
       TraversableLike → GenTraversableLike

136. #### 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.

     B

       the type of the elements in the resulting collection

     That

       the actual type of the resulting collection

     z

       the initial value

     op

       the binary operator applied to the intermediate result and the element

     bf

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

     returns

       collection with intermediate results

     Definition Classes
       TraversableLike → GenTraversableLike

137. #### 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.

     Example:

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

     B

       the type of the elements in the resulting collection

     That

       the actual type of the resulting collection

     z

       the initial value

     op

       the binary operator applied to the intermediate result and the element

     bf

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

     returns

       collection with intermediate results

     Definition Classes
       TraversableLike → GenTraversableLike
     Annotations
       @migration
     Migration

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

138. #### 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 double linked list starting from index `from` such that every element of the segment satisfies the predicate `p`.

     Definition Classes
       SeqLike → GenSeqLike

139. #### def size: Int

     The size of this double linked list, equivalent to `length`.

     The size of this double linked list, equivalent to `length`.

     Note: will not terminate for infinite-sized collections.

     returns

       the number of elements in this double linked list.

     Definition Classes
       SeqLike → GenTraversableLike → TraversableOnce → GenTraversableOnce

140. #### def slice(from: Int, 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

     returns

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

     Definition Classes
       IterableLike → TraversableLike → GenTraversableLike

141. #### def sliding(size: Int, step: Int): Iterator[This]

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

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

     size

       the number of elements per group

     step

       the distance between the first elements of successive groups (defaults to 1)

     returns

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

     Definition Classes
       IterableLike
     See also

       scala.collection.Iterator, method `sliding`

142. #### def sliding(size: Int): Iterator[This]

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

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

     size

       the number of elements per group

     returns

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

     Definition Classes
       IterableLike
     See also

       scala.collection.Iterator, method `sliding`

143. #### def sortBy[B](f: (A) ⇒ B)(implicit ord: math.Ordering[B]): This

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

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

     B

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

     f

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

     ord

       the ordering assumed on domain `B`.

     returns

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

     Definition Classes
       SeqLike
     Example:

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

     See also

       scala.math.Ordering

       Note: will not terminate for infinite-sized collections.

144. #### def sortWith(lt: (A, A) ⇒ Boolean): This

     Sorts this double linked list according to a comparison function.

     Sorts this double linked list according to a comparison function.

     Note: will not terminate for infinite-sized collections.

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

     lt

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

     returns

       a double linked list consisting of the elements of this double linked list sorted according to the comparison function `lt`.

     Definition Classes
       SeqLike
     Example:

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

145. #### def sorted[B >: A](implicit ord: math.Ordering[B]): This

     Sorts this double linked list according to an Ordering.

     Sorts this double linked list according to an Ordering.

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

     ord

       the ordering to be used to compare elements.

     returns

       a double linked list consisting of the elements of this double linked list sorted according to the ordering `ord`.

     Definition Classes
       SeqLike
     See also

       scala.math.Ordering

146. #### def span(p: (A) ⇒ Boolean): (This, This)

     Splits this double linked list into a prefix/suffix pair according to a predicate.

     Splits this double linked list 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.

     returns

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

     Definition Classes
       TraversableLike → GenTraversableLike

147. #### def splitAt(n: Int): (This, This)

     Splits this double linked list into two at a given position.

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

     n

       the position at which to split.

     returns

       a pair of double linked lists consisting of the first `n` elements of this double linked list, and the other elements.

     Definition Classes
       TraversableLike → GenTraversableLike

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

     Tests whether this double linked list contains the given sequence at a given index.

     Tests whether this double linked list 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 double linked list at index `offset`, otherwise `false`.

     Definition Classes
       SeqLike → GenSeqLike

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

     Tests whether this double linked list starts with the given sequence.

     Tests whether this double linked list 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

150. #### 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 double linked list. By default the string prefix is the simple name of the collection class double linked list.

     Definition Classes
       TraversableLike → GenTraversableLike

151. #### 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 double linked list 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 double linked list and as result type of `sum`. Examples of such types are: `Long`, `Float`, `Double`, `BigInt`.

     Definition Classes
       TraversableOnce → GenTraversableOnce
     Full Signature

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

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

     Definition Classes
       AnyRef

153. #### def tail: This

     Selects all elements except the first.

     Selects all elements except the first.

     returns

       a double linked list consisting of all elements of this double linked list except the first one.

     Definition Classes
       DoubleLinkedListLike → LinkedListLike → TraversableLike → GenTraversableLike
     Exceptions thrown
       `UnsupportedOperationException`

       if the double linked list is empty.

154. #### def tails: Iterator[This]

     Iterates over the tails of this double linked list.

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

     returns

       an iterator over all the tails of this double linked list

     Definition Classes
       TraversableLike
     Example:

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

155. #### def take(n: Int): This

     Selects first n elements.

     Selects first n elements.

     n

       the number of elements to take from this double linked list.

     returns

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

     Definition Classes
       IterableLike → TraversableLike → GenTraversableLike

156. #### def takeRight(n: Int): This

     Selects last n elements.

     Selects last n elements.

     n

       the number of elements to take

     returns

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

     Definition Classes
       IterableLike

157. #### def takeWhile(p: (A) ⇒ Boolean): This

     Takes longest prefix of elements that satisfy a predicate.

     Takes longest prefix of elements that satisfy a predicate.

     returns

       the longest prefix of this double linked list whose elements all satisfy the predicate `p`.

     Definition Classes
       IterableLike → TraversableLike → GenTraversableLike

158. #### def thisCollection: collection.Seq[A]

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

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

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

159. #### def to[Col[_]]: Col[A]

     [use case] Converts this double linked list into another by copying all elements.

     [use case]

     Converts this double linked list 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 double linked list.

     Definition Classes
       TraversableLike → TraversableOnce → GenTraversableOnce
     Full Signature

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

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

     [use case] Converts this double linked list to an array.

     [use case]

     Converts this double linked list to an array.

     Note: will not terminate for infinite-sized collections.

     returns

       an array containing all elements of this double linked list. An `ClassTag` must be available for the element type of this double linked list.

     Definition Classes
       TraversableOnce → GenTraversableOnce
     Full Signature

     #### def toArray[B >: A](implicit arg0: ClassTag[B]): Array[B]

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

     Converts this double linked list to a mutable buffer.

     Converts this double linked list to a mutable buffer.

     Note: will not terminate for infinite-sized collections.

     returns

       a buffer containing all elements of this double linked list.

     Definition Classes
       TraversableOnce → GenTraversableOnce

162. #### def toCollection(repr: This): collection.Seq[A]

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

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

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

163. #### def toIndexedSeq: immutable.IndexedSeq[A]

     Converts this double linked list to an indexed sequence.

     Converts this double linked list to an indexed sequence.

     Note: will not terminate for infinite-sized collections.

     returns

       an indexed sequence containing all elements of this double linked list.

     Definition Classes
       TraversableOnce → GenTraversableOnce

164. #### def toIterable: collection.Iterable[A]

     Converts this double linked list to an iterable collection.

     Converts this double linked list 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 double linked list.

     Definition Classes
       IterableLike → TraversableOnce → GenTraversableOnce

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

     Returns an Iterator over the elements in this double linked list.

     Returns an Iterator over the elements in this double linked list. 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 double linked list.

     Definition Classes
       IterableLike → TraversableLike → GenTraversableOnce

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

     Converts this double linked list to a list.

     Converts this double linked list to a list.

     Note: will not terminate for infinite-sized collections.

     returns

       a list containing all elements of this double linked list.

     Definition Classes
       TraversableOnce → GenTraversableOnce

167. #### def toMap[T, U]: collection.Map[T, U]

     [use case] Converts this double linked list to a map.

     [use case]

     Converts this double linked list 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 double linked list.

     Definition Classes
       TraversableOnce → GenTraversableOnce
     Full Signature

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

168. #### def toParArray: ParArray[A]

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

169. #### def toSeq: collection.Seq[A]

     Converts this double linked list to a sequence.

     Converts this double linked list to a sequence.

     Note: will not terminate for infinite-sized collections.

     Overridden for efficiency.

     returns

       a sequence containing all elements of this double linked list.

     Definition Classes
       SeqLike → GenSeqLike → TraversableOnce → GenTraversableOnce

170. #### def toSet[B >: A]: immutable.Set[B]

     Converts this double linked list to a set.

     Converts this double linked list to a set.

     Note: will not terminate for infinite-sized collections.

     returns

       a set containing all elements of this double linked list.

     Definition Classes
       TraversableOnce → GenTraversableOnce

171. #### def toStream: immutable.Stream[A]

     Converts this double linked list to a stream.

     Converts this double linked list to a stream.

     Note: will not terminate for infinite-sized collections.

     returns

       a stream containing all elements of this double linked list.

     Definition Classes
       IterableLike → TraversableLike → GenTraversableOnce

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

     Converts this double linked list to a string.

     Converts this double linked list to a string.

     returns

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

     Definition Classes
       SeqLike → TraversableLike → Any

173. #### def toTraversable: collection.Traversable[A]

     Converts this double linked list to an unspecified Traversable.

     Converts this double linked list 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 double linked list.

     Definition Classes
       TraversableLike → TraversableOnce → GenTraversableOnce

174. #### def toVector: Vector[A]

     Converts this double linked list to a Vector.

     Converts this double linked list to a Vector.

     Note: will not terminate for infinite-sized collections.

     returns

       a vector containing all elements of this double linked list.

     Definition Classes
       TraversableOnce → GenTraversableOnce

175. #### def transform(f: (A) ⇒ A): DoubleLinkedListLike.this.type

     Applies a transformation function to all values contained in this sequence.

     Applies a transformation function to all values contained in this sequence. The transformation function produces new values from existing elements.

     f

       the transformation to apply

     returns

       the sequence itself.

     Definition Classes
       SeqLike

176. #### def union(that: collection.Seq[A]): DoubleLinkedList[A]

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

     [use case]

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

     Definition Classes
       SeqLike → GenSeqLike
     Full Signature

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

177. #### def update(n: Int, x: A): Unit

     Replaces element at given index with a new value.

     Replaces element at given index with a new value.

     Definition Classes
       DoubleLinkedListLike → LinkedListLike → SeqLike
     Exceptions thrown
       IndexOutOfBoundsException

       if the index is not valid.

178. #### def updated(index: Int, elem: A): DoubleLinkedList[A]

     [use case] A copy of this double linked list with one single replaced element.

     [use case]

     A copy of this double linked list with one single replaced element.

     index

       the position of the replacement

     elem

       the replacing element

     returns

       a copy of this double linked list with the element at position `index` replaced by `elem`.

     Definition Classes
       SeqLike → GenSeqLike
     Full Signature

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

179. #### def view(from: Int, until: Int): SeqView[A, This]

     Creates a non-strict view of a slice of this double linked list.

     Creates a non-strict view of a slice of this double linked list.

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

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

     from

       the index of the first element of the view

     until

       the index of the element following the view

     returns

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

     Definition Classes
       SeqLike → IterableLike → TraversableLike

180. #### def view: SeqView[A, This]

     Creates a non-strict view of this double linked list.

     Creates a non-strict view of this double linked list.

     returns

       a non-strict view of this double linked list.

     Definition Classes
       SeqLike → IterableLike → TraversableLike

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

     Definition Classes
       AnyRef
     Annotations
       @throws()

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

     Definition Classes
       AnyRef
     Annotations
       @throws()

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

     Definition Classes
       AnyRef
     Annotations
       @throws()

184. #### def withFilter(p: (A) ⇒ Boolean): FilterMonadic[A, This]

     Creates a non-strict filter of this double linked list.

     Creates a non-strict filter of this double linked list.

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

     p

       the predicate used to test elements.

     returns

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

     Definition Classes
       TraversableLike → FilterMonadic

185. #### def zip[B](that: GenIterable[B]): DoubleLinkedList[(A, B)]

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

     [use case]

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

     B

       the type of the second half of the returned pairs

     that

       The iterable providing the second half of each result pair

     returns

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

     Definition Classes
       IterableLike → GenIterableLike
     Full Signature

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

186. #### def zipAll[B](that: collection.Iterable[B], thisElem: A, thatElem: B): DoubleLinkedList[(A, B)]

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

     [use case]

     Returns a double linked list formed from this double linked list 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.

     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 double linked list is shorter than `that`.

     thatElem

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

     returns

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

     Definition Classes
       IterableLike → GenIterableLike
     Full Signature

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

187. #### def zipWithIndex: DoubleLinkedList[(A, Int)]

     [use case] Zips this double linked list with its indices.

     [use case]

     Zips this double linked list with its indices.

     returns

       A new double linked list containing pairs consisting of all elements of this double linked list paired with their index. Indices start at `0`.

     Definition Classes
       IterableLike → GenIterableLike
     Full Signature

     #### 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))`

188. #### def →[B](y: B): (DoubleLinkedListLike[A, This], B)

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

### Shadowed Implict Value Members

1. #### def filter(p: (A) ⇒ Boolean): TraversableOnce[A]

   Implicit information
     This member is added by an implicit conversion from DoubleLinkedListLike[A, This] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (doubleLinkedListLike: MonadOps[A]).filter(p)

   Definition Classes
     MonadOps

2. #### def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): TraversableOnce[B]

   Implicit information
     This member is added by an implicit conversion from DoubleLinkedListLike[A, This] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (doubleLinkedListLike: MonadOps[A]).flatMap(f)

   Definition Classes
     MonadOps

3. #### def map[B](f: (A) ⇒ B): TraversableOnce[B]

   Implicit information
     This member is added by an implicit conversion from DoubleLinkedListLike[A, This] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (doubleLinkedListLike: MonadOps[A]).map(f)

   Definition Classes
     MonadOps

4. #### val self: Any

   Implicit information
     This member is added by an implicit conversion from DoubleLinkedListLike[A, 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:

         (doubleLinkedListLike: StringAdd).self

   Definition Classes
     StringAdd

5. #### val self: Any

   Implicit information
     This member is added by an implicit conversion from DoubleLinkedListLike[A, 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:

         (doubleLinkedListLike: StringFormat).self

   Definition Classes
     StringFormat

6. #### def withFilter(p: (A) ⇒ Boolean): Iterator[A]

   Implicit information
     This member is added by an implicit conversion from DoubleLinkedListLike[A, This] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (doubleLinkedListLike: MonadOps[A]).withFilter(p)

   Definition Classes
     MonadOps

### 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: DoubleLinkedListLike[A, This]

   Implicit information
     This member is added by an implicit conversion from DoubleLinkedListLike[A, This] to ArrowAssoc[DoubleLinkedListLike[A, 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:

         (doubleLinkedListLike: ArrowAssoc[DoubleLinkedListLike[A, This]]).x

   Definition Classes
     ArrowAssoc
   Annotations
     @deprecated
   Deprecated

     (Since version 2.10.0) Use `leftOfArrow`instead``

3. #### def x: DoubleLinkedListLike[A, This]

   Implicit information
     This member is added by an implicit conversion from DoubleLinkedListLike[A, This] to Ensuring[DoubleLinkedListLike[A, 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:

         (doubleLinkedListLike: Ensuring[DoubleLinkedListLike[A, This]]).x

   Definition Classes
     Ensuring
   Annotations
     @deprecated
   Deprecated

     (Since version 2.10.0) Use `resultOfEnsuring`instead``

### Inherited from LinkedListLike[A, This]

### Inherited from SeqLike[A, This]

### Inherited from Cloneable[This]

### Inherited from scala.Cloneable

### Inherited from java.lang.Cloneable

### Inherited from collection.SeqLike[A, This]

### Inherited from GenSeqLike[A, This]

### Inherited from IterableLike[A, This]

### Inherited from GenIterableLike[A, This]

### Inherited from TraversableLike[A, This]

### Inherited from GenTraversableLike[A, This]

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

### Inherited from TraversableOnce[A]

### Inherited from GenTraversableOnce[A]

### Inherited from FilterMonadic[A, This]

### Inherited from HasNewBuilder[A, This]

### Inherited from Equals

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion traversable2ops from DoubleLinkedListLike[A, This] to TraversableOps[A]

### Inherited by implicit conversion MonadOps from DoubleLinkedListLike[A, This] to MonadOps[A]

### Inherited by implicit conversion any2stringadd from DoubleLinkedListLike[A, This] to StringAdd

### Inherited by implicit conversion any2stringfmt from DoubleLinkedListLike[A, This] to StringFormat

### Inherited by implicit conversion any2ArrowAssoc from DoubleLinkedListLike[A, This] to ArrowAssoc[DoubleLinkedListLike[A, This]]

### Inherited by implicit conversion any2Ensuring from DoubleLinkedListLike[A, This] to Ensuring[DoubleLinkedListLike[A, This]]

### Inherited by implicit conversion alternateImplicit from DoubleLinkedListLike[A, This] to ForceImplicitAmbiguity

### Ungrouped