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Scala example source code file (WrappedArrayBuilder.scala)
The Scala WrappedArrayBuilder.scala source code/* __ *\ ** ________ ___ / / ___ Scala API ** ** / __/ __// _ | / / / _ | (c) 2003-2011, LAMP/EPFL ** ** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ ** ** /____/\___/_/ |_/____/_/ | | ** ** |/ ** \* */ package scala.collection package mutable import generic._ import scala.reflect.ClassManifest /** A builder class for arrays. * * @tparam A type of elements that can be added to this builder. * @param manifest class manifest for objects of type `A`. * * @since 2.8 */ class WrappedArrayBuilder[A](manifest: ClassManifest[A]) extends Builder[A, WrappedArray[A]] { private var elems: WrappedArray[A] = _ private var capacity: Int = 0 private var size: Int = 0 private def mkArray(size: Int): WrappedArray[A] = { val newelems = manifest.newWrappedArray(size) if (this.size > 0) Array.copy(elems.array, 0, newelems.array, 0, this.size) newelems } private def resize(size: Int) { elems = mkArray(size) capacity = size } override def sizeHint(size: Int) { if (capacity < size) resize(size) } private def ensureSize(size: Int) { if (capacity < size) { var newsize = if (capacity == 0) 16 else capacity * 2 while (newsize < size) newsize *= 2 resize(newsize) } } def +=(elem: A): this.type = { ensureSize(size + 1) elems(size) = elem size += 1 this } def clear() { size = 0 } def result() = { if (capacity != 0 && capacity == size) elems else mkArray(size) } // todo: add ++= } Other Scala examples (source code examples)Here is a short list of links related to this Scala WrappedArrayBuilder.scala source code file: |
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