Packages

  • package root
    Definition Classes
    root
  • package strawman
    Definition Classes
    root
  • package collection

    A strawman architecture for new collections.

    A strawman architecture for new collections. It contains some example collection classes and methods with the intent to expose some key issues. It would be good to compare this to odether implementations of the same functionality, to get an idea of the strengths and weaknesses of different collection architectures.

    For a test file, see tests/run/CollectionTests.scala.

    Strawman6 is like strawman5, and adds lazy lists (i.e. lazie streams), arrays and some utilitity methods (take, tail, mkString, toArray). Also, systematically uses builders for all strict collections.

    Types covered in this strawman:

    1. Collection base types:

    IterableOnce, Iterable, Seq, LinearSeq, View, IndexedView

    2. Collection creator base types:

    FromIterable, IterableFactory, Buildable, Builder

    3. Types that bundle operations:

    IterableOps, IterableMonoTransforms, IterablePolyTransforms, IterableLike SeqMonoTransforms, SeqLike

    4. Concrete collection types:

    List, LazyList, ListBuffer, ArrayBuffer, ArrayBufferView, StringView, ArrayView

    5. Decorators for existing types

    StringOps, ArrayOps

    6. Related non collection types:

    Iterator, StringBuilder

    Operations covered in this strawman:

    1. Abstract operations, or expected to be overridden:

    For iterables:

    iterator, fromIterable, fromIterableWithSameElemType, knownLength, className

    For sequences:

    apply, length

    For buildables:

    newBuilder

    For builders:

    +=, result

    2. Utility methods, might be overridden for performance:

    Operations returning not necessarily a collection:

    foreach, foldLeft, foldRight, indexWhere, isEmpty, head, size, mkString

    Operations returning a collection of a fixed type constructor:

    view, to, toArray, copyToArray

    Type-preserving generic transforms:

    filter, partition, take, drop, tail, reverse

    Generic transforms returning collections of different element types:

    map, flatMap, ++, zip

    Definition Classes
    strawman
  • package mutable
    Definition Classes
    collection
  • ArrayBuffer
  • ArrayBufferView
  • BitSet
  • Buildable
  • Builder
  • Growable
  • GrowableSeq
  • HashMap
  • HashSet
  • IndexedOptimizedGrowableSeq
  • IndexedOptimizedSeq
  • Iterable
  • ListBuffer
  • Map
  • MapLike
  • RefArrayUtils
  • Seq
  • Set
  • SetLike
  • SetMonoTransforms
  • SortedSet
  • SortedSetLike
  • StringBuilder

class ArrayBuffer[A] extends IndexedOptimizedGrowableSeq[A] with SeqLike[A, ArrayBuffer] with Buildable[A, ArrayBuffer[A]] with Builder[A, ArrayBuffer[A]]

Concrete collection type: ArrayBuffer

Linear Supertypes
Builder[A, ArrayBuffer[A]], Buildable[A, ArrayBuffer[A]], IndexedOptimizedGrowableSeq[A], GrowableSeq[A], Growable[A], IndexedOptimizedSeq[A], Seq[A], Iterable[A], collection.Seq[A], ArrayLike[A], SeqLike[A, ArrayBuffer], Equals, SeqMonoTransforms[A, ArrayBuffer[A @scala.annotation.unchecked.uncheckedVariance]], collection.Iterable[A], IterableLike[A, ArrayBuffer], IterablePolyTransforms[A, ArrayBuffer], IterableMonoTransforms[A, ArrayBuffer[A @scala.annotation.unchecked.uncheckedVariance]], IterableOps[A], FromIterable[ArrayBuffer], IterableOnce[A], AnyRef, Any
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  2. By Inheritance
Inherited
  1. ArrayBuffer
  2. Builder
  3. Buildable
  4. IndexedOptimizedGrowableSeq
  5. GrowableSeq
  6. Growable
  7. IndexedOptimizedSeq
  8. Seq
  9. Iterable
  10. Seq
  11. ArrayLike
  12. SeqLike
  13. Equals
  14. SeqMonoTransforms
  15. Iterable
  16. IterableLike
  17. IterablePolyTransforms
  18. IterableMonoTransforms
  19. IterableOps
  20. FromIterable
  21. IterableOnce
  22. AnyRef
  23. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new ArrayBuffer()

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. def ++[B >: A](xs: IterableOnce[B]): ArrayBuffer[B]

    Concatenation

    Concatenation

    Definition Classes
    IterablePolyTransforms
  4. def ++=(elems: IterableOnce[A]): ArrayBuffer.this.type

    Overridden to use array copying for efficiency where possible.

    Overridden to use array copying for efficiency where possible.

    returns

    the $coll itself.

    Definition Classes
    ArrayBuffer → Growable
  5. def +=(elem: A): ArrayBuffer.this.type

    Append an element

    Append an element

    returns

    the $coll itself

    Definition Classes
    ArrayBuffer → Builder → Growable
  6. def +=(elem1: A, elem2: A, elems: A*): ArrayBuffer.this.type

    ${Add}s two or more elements to this $coll.

    ${Add}s two or more elements to this $coll.

    elem1

    the first element to $add.

    elem2

    the second element to $add.

    elems

    the remaining elements to $add.

    returns

    the $coll itself

    Definition Classes
    Growable
  7. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. def apply(n: Int): A
    Definition Classes
    ArrayBuffer → ArrayLike
  9. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  10. 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 $coll should be compared

    returns

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

    Definition Classes
    SeqLike → Equals
  11. def className: String

    The class name of this collection.

    The class name of this collection. To be used for converting to string. Collections generally print like this:

    <className>(elem_1, ..., elem_n)

    Definition Classes
    ArrayBuffer → IterableOps
  12. def clear(): Unit

    Clears the contents of this builder.

    Clears the contents of this builder. After execution of this method the builder will contain no elements.

    Definition Classes
    ArrayBuffer → Builder → Growable
  13. def clone(): AnyRef
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  14. def coll: ArrayBuffer.this.type

    The collection itself

    The collection itself

    Attributes
    protected
    Definition Classes
    Iterable → IterablePolyTransforms → IterableMonoTransforms → IterableOps
  15. def copyToArray[B >: A](xs: Array[B], start: Int = 0): xs.type

    Copy all elements of this collection to array xs, starting at start.

    Copy all elements of this collection to array xs, starting at start.

    Definition Classes
    IterableOps
  16. def drop(n: Int): ArrayBuffer[A @scala.annotation.unchecked.uncheckedVariance]

    The rest of the collection without its n first elements.

    The rest of the collection without its n first elements. For linear, immutable collections this should avoid making a copy.

    Definition Classes
    IterableMonoTransforms
  17. def dropInPlace(n: Int): ArrayBuffer.this.type
    Definition Classes
    GrowableSeq
  18. def dropRightInPlace(n: Int): ArrayBuffer.this.type
    Definition Classes
    GrowableSeq
  19. def dropWhileInPlace(p: (A) ⇒ Boolean): ArrayBuffer.this.type
    Definition Classes
    GrowableSeq
  20. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  21. def equals(o: Any): Boolean
    Definition Classes
    SeqLike → Equals → AnyRef → Any
  22. def filter(p: (A) ⇒ Boolean): ArrayBuffer[A @scala.annotation.unchecked.uncheckedVariance]

    All elements satisfying predicate p

    All elements satisfying predicate p

    Definition Classes
    IterableMonoTransforms
  23. def filterInPlace(p: (A) ⇒ Boolean): ArrayBuffer.this.type
    Definition Classes
    IndexedOptimizedGrowableSeq → GrowableSeq
  24. def finalize(): Unit
    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  25. def flatMap[B](f: (A) ⇒ IterableOnce[B]): ArrayBuffer[B]

    Flatmap

    Flatmap

    Definition Classes
    IterablePolyTransforms
  26. def flatMapInPlace(f: (A) ⇒ IterableOnce[A]): ArrayBuffer.this.type
    Definition Classes
    IndexedOptimizedGrowableSeq → GrowableSeq
  27. def foldLeft[B](z: B)(op: (B, A) ⇒ B): B

    Fold left

    Fold left

    Definition Classes
    IterableOps
  28. def foldRight[B](z: B)(op: (A, B) ⇒ B): B

    Fold right

    Fold right

    Definition Classes
    IterableOps
  29. def foreach[U](f: (A) ⇒ U): Unit

    Apply f to each element for its side effects Note: [U] parameter needed to help scalac's type inference.

    Apply f to each element for its side effects Note: [U] parameter needed to help scalac's type inference.

    Definition Classes
    IterableOps
  30. def fromIterable[B](it: collection.Iterable[B]): ArrayBuffer[B]
    Definition Classes
    ArrayBuffer → IterablePolyTransforms → FromIterable
  31. def fromIterableWithSameElemType(coll: collection.Iterable[A]): ArrayBuffer[A]

    Create a collection of type C[A] from the elements of coll, which has the same element type as this collection.

    Create a collection of type C[A] from the elements of coll, which has the same element type as this collection. Overridden in StringOps and ArrayOps.

    Attributes
    protected[this]
    Definition Classes
    SeqLike → IterableLike → IterableMonoTransforms
  32. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
  33. def hashCode(): Int
    Definition Classes
    SeqLike → AnyRef → Any
  34. def head: A

    The first element of the collection.

    The first element of the collection.

    Definition Classes
    IterableOps
  35. def indexWhere(p: (A) ⇒ Boolean): Int

    The index of the first element in this collection for which p holds.

    The index of the first element in this collection for which p holds.

    Definition Classes
    IterableOps
  36. def insert(idx: Int, elem: A): Unit
    Definition Classes
    ArrayBuffer → GrowableSeq
  37. def insertAll(idx: Int, elems: IterableOnce[A]): Unit
    Definition Classes
    ArrayBuffer → GrowableSeq
  38. def isEmpty: Boolean

    Is the collection empty?

    Is the collection empty?

    Definition Classes
    IterableOps
  39. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  40. def iterator(): Iterator[Nothing]

    Iterator can be used only once

    Iterator can be used only once

    Definition Classes
    ArrayBuffer → IterableOnce
  41. def knownSize: Int

    The number of elements in this collection, if it can be cheaply computed, -1 otherwise.

    The number of elements in this collection, if it can be cheaply computed, -1 otherwise. Cheaply usually means: Not requiring a collection traversal.

    Definition Classes
    ArrayBuffer → IterableOps
  42. def length: Int
    Definition Classes
    ArrayBuffer → ArrayLike
  43. def map[B](f: (A) ⇒ B): ArrayBuffer[B]

    Map

    Map

    Definition Classes
    IterablePolyTransforms
  44. def mapInPlace(f: (A) ⇒ A): ArrayBuffer.this.type
    Definition Classes
    IndexedOptimizedSeq → Seq
  45. def mapResult[NewTo](f: (ArrayBuffer[A]) ⇒ NewTo): Builder[A, NewTo]

    A builder resulting from this builder my mapping the result using f.

    A builder resulting from this builder my mapping the result using f.

    Definition Classes
    Builder
  46. def mkString(sep: String): String

    A string showing all elements of this collection, separated by string sep.

    A string showing all elements of this collection, separated by string sep.

    Definition Classes
    IterableOps
  47. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  48. def newBuilder: ArrayBuffer[A]

    Creates a new builder.

    Creates a new builder.

    Attributes
    protected[this]
    Definition Classes
    ArrayBuffer → Buildable
  49. def nonEmpty: Boolean

    Is the collection not empty?

    Is the collection not empty?

    Definition Classes
    IterableOps
  50. final def notify(): Unit
    Definition Classes
    AnyRef
  51. final def notifyAll(): Unit
    Definition Classes
    AnyRef
  52. def padToInPlace(len: Int, elem: A): ArrayBuffer.this.type
    Definition Classes
    GrowableSeq
  53. def partition(p: (A) ⇒ Boolean): (ArrayBuffer[A], ArrayBuffer[A])

    Optimized, push-based version of partition.

    Optimized, push-based version of partition.

    Definition Classes
    Buildable → IterableMonoTransforms
  54. def patchInPlace(from: Int, patch: collection.Seq[A], replaced: Int): ArrayBuffer.this.type
    Definition Classes
    IndexedOptimizedGrowableSeq → GrowableSeq
  55. def remove(from: Int, n: Int): Unit
    Definition Classes
    ArrayBuffer → GrowableSeq
  56. def remove(idx: Int): A
    Definition Classes
    ArrayBuffer → GrowableSeq
  57. def result: ArrayBuffer[A]

    Result collection consisting of all elements appended so far.

    Result collection consisting of all elements appended so far.

    Definition Classes
    ArrayBuffer → Builder
  58. def reverse: ArrayBuffer[A @scala.annotation.unchecked.uncheckedVariance]
    Definition Classes
    SeqMonoTransforms
  59. def sameElements[B >: A](that: IterableOnce[B]): Boolean

    Do the elements of this collection are the same (and in the same order) as those of that?

    Do the elements of this collection are the same (and in the same order) as those of that?

    Definition Classes
    SeqLike
  60. def size: Int

    The number of elements in this collection.

    The number of elements in this collection. Does not terminate for infinite collections.

    Definition Classes
    IterableOps
  61. def sliceInPlace(start: Int, end: Int): ArrayBuffer.this.type
    Definition Classes
    GrowableSeq
  62. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  63. def tail: ArrayBuffer[A @scala.annotation.unchecked.uncheckedVariance]

    The rest of the collection without its first element.

    The rest of the collection without its first element.

    Definition Classes
    IterableMonoTransforms
  64. def take(n: Int): ArrayBuffer[A @scala.annotation.unchecked.uncheckedVariance]

    A collection containing the first n elements of this collection.

    A collection containing the first n elements of this collection.

    Definition Classes
    IterableMonoTransforms
  65. def takeInPlace(n: Int): ArrayBuffer.this.type
    Definition Classes
    GrowableSeq
  66. def takeRightInPlace(n: Int): ArrayBuffer.this.type
    Definition Classes
    GrowableSeq
  67. def takeWhileInPlace(p: (A) ⇒ Boolean): ArrayBuffer.this.type
    Definition Classes
    GrowableSeq
  68. def to[C[X] <: collection.Iterable[X]](fi: FromIterable[C]): C[A]

    Given a collection factory fi for collections of type constructor C, convert this collection to one of type C[A].

    Given a collection factory fi for collections of type constructor C, convert this collection to one of type C[A]. Example uses:

    xs.to(List) xs.to(ArrayBuffer)

    Definition Classes
    IterableOps
  69. def toArray[B >: A](implicit arg0: ClassTag[B]): Array[B]

    Convert collection to array.

    Convert collection to array.

    Definition Classes
    IterableOps
  70. def toString(): String
    Definition Classes
    IterableOps → Any
  71. def update(n: Int, elem: A): Unit
    Definition Classes
    ArrayBuffer → Seq
  72. def view: ArrayBufferView[Nothing]

    A view representing the elements of this collection.

    A view representing the elements of this collection.

    Definition Classes
    ArrayBuffer → IterableOps
  73. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  74. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  75. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  76. def zip[B](xs: IterableOnce[B]): ArrayBuffer[(A, B)]

    Zip.

    Zip. Interesting because it requires to align to source collections.

    Definition Classes
    IterablePolyTransforms

Inherited from Builder[A, ArrayBuffer[A]]

Inherited from Buildable[A, ArrayBuffer[A]]

Inherited from IndexedOptimizedGrowableSeq[A]

Inherited from GrowableSeq[A]

Inherited from Growable[A]

Inherited from IndexedOptimizedSeq[A]

Inherited from Seq[A]

Inherited from Iterable[A]

Inherited from collection.Seq[A]

Inherited from ArrayLike[A]

Inherited from SeqLike[A, ArrayBuffer]

Inherited from Equals

Inherited from SeqMonoTransforms[A, ArrayBuffer[A @scala.annotation.unchecked.uncheckedVariance]]

Inherited from collection.Iterable[A]

Inherited from IterableLike[A, ArrayBuffer]

Inherited from IterablePolyTransforms[A, ArrayBuffer]

Inherited from IterableMonoTransforms[A, ArrayBuffer[A @scala.annotation.unchecked.uncheckedVariance]]

Inherited from IterableOps[A]

Inherited from FromIterable[ArrayBuffer]

Inherited from IterableOnce[A]

Inherited from AnyRef

Inherited from Any

Ungrouped