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

    Definition Classes
    GenSeqLikeParallelizableGenTraversableOnce

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
    TraversableLikeGenTraversableLike
    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
    SeqLikeGenSeqLike
    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
    TraversableOnceGenTraversableOnce
  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
    SeqLikeGenSeqLike
    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
    TraversableOnceGenTraversableOnce
  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
    TraversableOnceGenTraversableOnce
  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
    DoubleLinkedListLikeLinkedListLike
  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
    DoubleLinkedListLikeLinkedListLikeSeqLikeGenSeqLike
    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
    IterableLikeEquals
  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
    LinkedListLikeCloneable → 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
    TraversableLikeGenTraversableLike
    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
    IterableLikeTraversableLikeTraversableOnceGenTraversableOnce
    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
    TraversableOnceGenTraversableOnce
    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
    TraversableOnceGenTraversableOnce
    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
    SeqLikeGenSeqLike
  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
    TraversableOnceGenTraversableOnce
  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
    SeqLikeGenSeqLike
    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
    SeqLikeGenSeqLike
  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
    DoubleLinkedListLikeLinkedListLikeIterableLikeTraversableLikeGenTraversableLike
  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
    TraversableLikeGenTraversableLike
  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
    SeqLikeGenSeqLike
  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
    GenSeqLikeEqualsAny
  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
    IterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  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
    TraversableLikeGenTraversableLike
  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
    TraversableLikeGenTraversableLike
  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
    IterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  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
    TraversableLikeGenTraversableLikeFilterMonadic
    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
    TraversableOnceGenTraversableOnce
  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
    TraversableOnceGenTraversableOnce
  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
    IterableLikeTraversableOnceGenTraversableOnce
  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
    IterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  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
    LinkedListLikeIterableLikeTraversableLikeGenTraversableLikeTraversableOnceGenTraversableOnceFilterMonadic
    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
    DoubleLinkedListLikeLinkedListLike
  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
    TraversableLikeGenTraversableLike
  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
    TraversableLikeTraversableOnceGenTraversableOnce
  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
    GenSeqLikeAny
  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
    LinkedListLikeIterableLikeTraversableLikeGenTraversableLike
    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
    TraversableLikeGenTraversableLike
  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
    SeqLikeGenSeqLike
  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
    TraversableLikeGenTraversableLike
    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
    DoubleLinkedListLikeLinkedListLike
    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
    SeqLikeGenSeqLike
    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
    LinkedListLikeSeqLikeIterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  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
    TraversableLikeGenTraversableLikeGenTraversableOnce
  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
    LinkedListLikeIterableLikeGenIterableLike
  90. def last: A

    Selects the last element.

    Selects the last element.

    returns

    The last element of this double linked list.

    Definition Classes
    TraversableLikeGenTraversableLike
    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
    SeqLikeGenSeqLike
  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
    TraversableLikeGenTraversableLike
  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
    LinkedListLikeSeqLikeGenSeqLike
  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
    TraversableLikeGenTraversableLikeFilterMonadic
    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
    TraversableOnceGenTraversableOnce
    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
    TraversableOnceGenTraversableOnce
  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
    TraversableOnceGenTraversableOnce
    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
    TraversableOnceGenTraversableOnce
  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
    TraversableOnceGenTraversableOnce
  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
    TraversableOnceGenTraversableOnce
    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
    TraversableOnceGenTraversableOnce
    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
    TraversableOnceGenTraversableOnce
  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
    SeqLikeGenSeqLike
    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
    SeqLikeSeqLikeTraversableLikeParallelizable
  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
    TraversableLikeGenTraversableLike
  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
    SeqLikeGenSeqLike
    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
    TraversableOnceGenTraversableOnce
    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
    TraversableOnceGenTraversableOnce
    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
    TraversableOnceGenTraversableOnce
  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
    TraversableOnceGenTraversableOnce
  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
    IterableLikeTraversableOnceGenTraversableOnce
    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
    TraversableOnceGenTraversableOnce
  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
    TraversableLikeGenTraversableLike
  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
    SeqLikeGenSeqLike
  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
    SeqLikeGenSeqLike
    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
    IterableLikeGenIterableLike
    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
    TraversableLikeGenTraversableLike
  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
    TraversableLikeGenTraversableLike
  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
    TraversableLikeGenTraversableLike
    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
    SeqLikeGenSeqLike
  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
    SeqLikeGenTraversableLikeTraversableOnceGenTraversableOnce
  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
    IterableLikeTraversableLikeGenTraversableLike
  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
    TraversableLikeGenTraversableLike
  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
    TraversableLikeGenTraversableLike
  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
    SeqLikeGenSeqLike
  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
    TraversableLikeGenTraversableLike
  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
    TraversableOnceGenTraversableOnce
    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
    DoubleLinkedListLikeLinkedListLikeTraversableLikeGenTraversableLike
    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
    IterableLikeTraversableLikeGenTraversableLike
  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
    IterableLikeTraversableLikeGenTraversableLike
  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
    SeqLikeIterableLikeTraversableLike
  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
    TraversableLikeTraversableOnceGenTraversableOnce
    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
    TraversableOnceGenTraversableOnce
    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
    TraversableOnceGenTraversableOnce
  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
    SeqLikeIterableLikeTraversableLike
  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
    TraversableOnceGenTraversableOnce
  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
    IterableLikeTraversableOnceGenTraversableOnce
  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
    IterableLikeTraversableLikeGenTraversableOnce
  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
    TraversableOnceGenTraversableOnce
  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
    TraversableOnceGenTraversableOnce
    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
    SeqLikeGenSeqLikeTraversableOnceGenTraversableOnce
  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
    TraversableOnceGenTraversableOnce
  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
    IterableLikeTraversableLikeGenTraversableOnce
  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
    SeqLikeTraversableLikeAny
  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
    TraversableLikeTraversableOnceGenTraversableOnce
  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
    TraversableOnceGenTraversableOnce
  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
    SeqLikeGenSeqLike
    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
    DoubleLinkedListLikeLinkedListLikeSeqLike
    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
    SeqLikeGenSeqLike
    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
    SeqLikeIterableLikeTraversableLike
  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
    SeqLikeIterableLikeTraversableLike
  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
    TraversableLikeFilterMonadic
  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
    IterableLikeGenIterableLike
    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
    IterableLikeGenIterableLike
    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
    IterableLikeGenIterableLike
    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