Scala example source code file (ParallelArrayCheck.scala)

This example Scala source code file (ParallelArrayCheck.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

colltype, int, int, intparallelarraycheck, intseqoperators, intvalues, parallelarraycheck, parallelarraycheck, parallelseqcheck, pararray, pararray, seq, seq, string

The Scala ParallelArrayCheck.scala source code

package scala.collection.parallel
package mutable



import org.scalacheck._
import org.scalacheck.Gen
import org.scalacheck.Gen._
import org.scalacheck.Prop._
import org.scalacheck.Properties
import org.scalacheck.Arbitrary._

import scala.collection._
import scala.collection.parallel.ops._


abstract class ParallelArrayCheck[T](tp: String) extends ParallelSeqCheck[T]("ParArray[" + tp + "]") {
  // ForkJoinTasks.defaultForkJoinPool.setMaximumPoolSize(Runtime.getRuntime.availableProcessors * 2)
  // ForkJoinTasks.defaultForkJoinPool.setParallelism(Runtime.getRuntime.availableProcessors * 2)
  
  type CollType = ParArray[T]
  
  def isCheckingViews = false
  
  def hasStrictOrder = true

  def ofSize(vals: Seq[Gen[T]], sz: Int) = {
    val a = new mutable.ArrayBuffer[T](sz)
    val gen = vals(rnd.nextInt(vals.size))
    for (i <- 0 until sz) a += sample(gen)
    a
  }
  
  def fromSeq(a: Seq[T]) = {
    val pa = new ParArray[T](a.size)
    var i = 0
    for (elem <- a.toList) {
      pa(i) = elem
      i += 1
    }
    pa
  }
  
  property("array mappings must be equal") = forAll(collectionPairs) { case (t, coll) =>
    val results = for ((f, ind) <- mapFunctions.zipWithIndex)
      yield ("op index: " + ind) |: t.map(f) == coll.map(f)
    results.reduceLeft(_ && _)
  }
  
}


object IntParallelArrayCheck extends ParallelArrayCheck[Int]("Int") with IntSeqOperators with IntValues {
  override def instances(vals: Seq[Gen[Int]]) = oneOf(super.instances(vals), sized { sz =>
    (0 until sz).toArray.toSeq
  }, sized { sz => 
    (-sz until 0).toArray.toSeq
  })
}