scala.collection.mutable.ResizableArray

object ResizableArray extends SeqFactory[ResizableArray]

Type Members

type Coll = ResizableArray[_]

The underlying collection type with unknown element type

  • Attributes
    • protected[this]
  • Definition Classes
    • GenericCompanion

class GenericCanBuildFrom[A] extends CanBuildFrom[CC[_], A, CC[A]]

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

  • Definition Classes
    • GenTraversableFactory

Value Members From scala.collection.generic.GenTraversableFactory

def ReusableCBF: GenericCanBuildFrom[Nothing]

  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def concat[A](xss: collection.Traversable[A]*): ResizableArray[A]

Concatenates all argument collections into a single collection.

  • xss
    • the collections that are to be concatenated.
  • returns
    • the concatenation of all the collections.
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def fill[A](n: Int)(elem: ⇒ A): ResizableArray[A]

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

  • n
    • the number of elements contained in the collection.
  • elem
    • the element computation
  • returns
    • A collection that contains the results of n evaluations of elem .
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def fill[A](n1: Int, n2: Int)(elem: ⇒ A): ResizableArray[ResizableArray[A]]

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

  • n1
    • the number of elements in the 1st dimension
  • n2
    • the number of elements in the 2nd dimension
  • elem
    • the element computation
  • returns
    • A collection that contains the results of n1 x n2 evaluations of elem .
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def fill[A](n1: Int, n2: Int, n3: Int)(elem: ⇒ A): ResizableArray[ResizableArray[ResizableArray[A]]]

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

  • n1
    • the number of elements in the 1st dimension
  • n2
    • the number of elements in the 2nd dimension
  • n3
    • the number of elements in the 3nd dimension
  • elem
    • the element computation
  • returns
    • A collection that contains the results of n1 x n2 x n3 evaluations of elem .
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def fill[A](n1: Int, n2: Int, n3: Int, n4: Int)(elem: ⇒ A): ResizableArray[ResizableArray[ResizableArray[ResizableArray[A]]]]

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

  • n1
    • the number of elements in the 1st dimension
  • n2
    • the number of elements in the 2nd dimension
  • n3
    • the number of elements in the 3nd dimension
  • n4
    • the number of elements in the 4th dimension
  • elem
    • the element computation
  • returns
    • A collection that contains the results of n1 x n2 x n3 x n4 evaluations of elem .
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def fill[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(elem: ⇒ A): ResizableArray[ResizableArray[ResizableArray[ResizableArray[ResizableArray[A]]]]]

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

  • n1
    • the number of elements in the 1st dimension
  • n2
    • the number of elements in the 2nd dimension
  • n3
    • the number of elements in the 3nd dimension
  • n4
    • the number of elements in the 4th dimension
  • n5
    • the number of elements in the 5th dimension
  • elem
    • the element computation
  • returns
    • A collection that contains the results of n1 x n2 x n3 x n4 x n5 evaluations of elem .
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def iterate[A](start: A, len: Int)(f: (A) ⇒ A): ResizableArray[A]

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

  • start
    • the start value of the collection
  • len
    • the number of elements contained inthe collection
  • f
    • the function that’s repeatedly applied
  • returns
    • a collection with len values in the sequence start, f(start), f(f(start)), ...
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def range[T](start: T, end: T)(implicit arg0: Integral[T]): ResizableArray[T]

Produces a collection containing a sequence of increasing of integers.

  • start
    • the first element of the collection
  • end
    • the end value of the collection (the first value NOT contained)
  • returns
    • a collection with values start, start + 1, ..., end - 1
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def range[T](start: T, end: T, step: T)(implicit arg0: Integral[T]): ResizableArray[T]

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

  • start
    • the start value of the collection
  • end
    • the end value of the collection (the first value NOT contained)
  • step
    • the difference between successive elements of the collection (must be positive or negative)
  • returns
    • a collection with values start, start + step, ... up to, but excluding end
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def tabulate[A](n: Int)(f: (Int) ⇒ A): ResizableArray[A]

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

  • n
    • The number of elements in the collection
  • f
    • The function computing element values
  • returns
    • A collection consisting of elements f(0), ..., f(n -1)
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def tabulate[A](n1: Int, n2: Int)(f: (Int, Int) ⇒ A): ResizableArray[ResizableArray[A]]

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

  • n1
    • the number of elements in the 1st dimension
  • n2
    • the number of elements in the 2nd dimension
  • f
    • The function computing element values
  • returns
    • A collection consisting of elements f(i1, i2) for 0 <= i1 < n1 and 0 <= i2 < n2 .
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def tabulate[A](n1: Int, n2: Int, n3: Int)(f: (Int, Int, Int) ⇒ A): ResizableArray[ResizableArray[ResizableArray[A]]]

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

  • n1
    • the number of elements in the 1st dimension
  • n2
    • the number of elements in the 2nd dimension
  • n3
    • the number of elements in the 3nd dimension
  • f
    • The function computing element values
  • returns
    • A collection consisting of elements f(i1, i2, i3) for 0 <= i1 < n1 , 0 <= i2 < n2 , and 0 <= i3 < n3 .
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int)(f: (Int, Int, Int, Int) ⇒ A): ResizableArray[ResizableArray[ResizableArray[ResizableArray[A]]]]

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

  • n1
    • the number of elements in the 1st dimension
  • n2
    • the number of elements in the 2nd dimension
  • n3
    • the number of elements in the 3nd dimension
  • n4
    • the number of elements in the 4th dimension
  • f
    • The function computing element values
  • returns
    • A collection consisting of elements f(i1, i2, i3, i4) for 0 <= i1 < n1 , 0 <= i2 < n2 , 0 <= i3 < n3 , and 0 <= i4 < n4 .
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

def tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(f: (Int, Int, Int, Int, Int) ⇒ A): ResizableArray[ResizableArray[ResizableArray[ResizableArray[ResizableArray[A]]]]]

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

  • n1
    • the number of elements in the 1st dimension
  • n2
    • the number of elements in the 2nd dimension
  • n3
    • the number of elements in the 3nd dimension
  • n4
    • the number of elements in the 4th dimension
  • n5
    • the number of elements in the 5th dimension
  • f
    • The function computing element values
  • returns
    • A collection consisting of elements f(i1, i2, i3, i4, i5) for 0 <= i1 < n1 , 0 <= i2 < n2 , 0 <= i3 < n3 , 0 <= i4 < n4 , and 0 <= i5 < n5 .
  • Definition Classes
    • GenTraversableFactory

(defined at scala.collection.generic.GenTraversableFactory)

Value Members From scala.collection.generic.GenericCompanion

def apply[A](elems: A*): ResizableArray[A]

Creates a collection with the specified elements.

  • A
    • the type of the collection’s elements
  • elems
    • the elements of the created collection
  • returns
    • a new collection with elements elems
  • Definition Classes
    • GenericCompanion

(defined at scala.collection.generic.GenericCompanion)

def empty[A]: ResizableArray[A]

An empty collection of type CC[A]

  • A
    • the type of the collection’s elements
  • Definition Classes
    • GenericCompanion

(defined at scala.collection.generic.GenericCompanion)

Value Members From scala.collection.generic.SeqFactory

def unapplySeq[A](x: ResizableArray[A]): Some[ResizableArray[A]]

This method is called in a pattern match { case Seq(…) => }.

  • x
    • the selector value
  • returns
    • sequence wrapped in an option, if this is a Seq, otherwise none
  • Definition Classes
    • SeqFactory

(defined at scala.collection.generic.SeqFactory)

Value Members From scala.collection.mutable.ResizableArray

implicit def canBuildFrom[A]: CanBuildFrom[Coll, A, ResizableArray[A]]

(defined at scala.collection.mutable.ResizableArray)

def newBuilder[A]: Builder[A, ResizableArray[A]]

The default builder for Traversable objects.

  • A
    • the type of the collection’s elements
  • Definition Classes
    • ResizableArray → GenericCompanion (defined at scala.collection.mutable.ResizableArray)

Full Source:

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2003-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala
package collection
package mutable

import generic._

/** This class is used internally to implement data structures that
 *  are based on resizable arrays.
 *
 *  @tparam A    type of the elements contained in this resizable array.
 *
 *  @author  Matthias Zenger, Burak Emir
 *  @author Martin Odersky
 *  @version 2.8
 *  @since   1
 */
trait ResizableArray[A] extends IndexedSeq[A]
                           with GenericTraversableTemplate[A, ResizableArray]
                           with IndexedSeqOptimized[A, ResizableArray[A]] {

  override def companion: GenericCompanion[ResizableArray] = ResizableArray

  protected def initialSize: Int = 16
  protected var array: Array[AnyRef] = new Array[AnyRef](math.max(initialSize, 1))
  protected var size0: Int = 0

  //##########################################################################
  // implement/override methods of IndexedSeq[A]

  /** Returns the length of this resizable array.
   */
  def length: Int = size0

  def apply(idx: Int) = {
    if (idx >= size0) throw new IndexOutOfBoundsException(idx.toString)
    array(idx).asInstanceOf[A]
  }

  def update(idx: Int, elem: A) {
    if (idx >= size0) throw new IndexOutOfBoundsException(idx.toString)
    array(idx) = elem.asInstanceOf[AnyRef]
  }

  override def foreach[U](f: A => U) {
    var i = 0
    // size is cached here because profiling reports a lot of time spent calling
    // it on every iteration.  I think it's likely a profiler ghost but it doesn't
    // hurt to lift it into a local.
    val top = size
    while (i < top) {
      f(array(i).asInstanceOf[A])
      i += 1
    }
  }

  /** Fills the given array `xs` with at most `len` elements of this
   *  traversable starting at position `start`.
   *
   *  Copying will stop once either the end of the current traversable is
   *  reached or `len` elements have been copied or the end of the array
   *  is reached.
   *
   *  @param  xs the array to fill.
   *  @param  start starting index.
   *  @param  len number of elements to copy
   */
   override def copyToArray[B >: A](xs: Array[B], start: Int, len: Int) {
     val len1 = len min (xs.length - start) min length
     if (len1 > 0) Array.copy(array, 0, xs, start, len1)
   }

  //##########################################################################

  /** Remove elements of this array at indices after `sz`.
   */
  def reduceToSize(sz: Int) {
    require(sz <= size0)
    while (size0 > sz) {
      size0 -= 1
      array(size0) = null
    }
  }

  /** Ensure that the internal array has at least `n` cells. */
  protected def ensureSize(n: Int) {
    // Use a Long to prevent overflows
    val arrayLength: Long = array.length
    if (n > arrayLength) {
      var newSize: Long = arrayLength * 2
      while (n > newSize)
        newSize = newSize * 2
      // Clamp newSize to Int.MaxValue
      if (newSize > Int.MaxValue) newSize = Int.MaxValue

      val newArray: Array[AnyRef] = new Array(newSize.toInt)
      scala.compat.Platform.arraycopy(array, 0, newArray, 0, size0)
      array = newArray
    }
  }

  /** Swap two elements of this array.
   */
  protected def swap(a: Int, b: Int) {
    val h = array(a)
    array(a) = array(b)
    array(b) = h
  }

  /** Move parts of the array.
   */
  protected def copy(m: Int, n: Int, len: Int) {
    scala.compat.Platform.arraycopy(array, m, array, n, len)
  }
}

object ResizableArray extends SeqFactory[ResizableArray] {
  implicit def canBuildFrom[A]: CanBuildFrom[Coll, A, ResizableArray[A]] =
    ReusableCBF.asInstanceOf[GenericCanBuildFrom[A]]

  def newBuilder[A]: Builder[A, ResizableArray[A]] = new ArrayBuffer[A]
}