Scala example source code file (Operators.scala)

This example Scala source code file (Operators.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

boolean, boolean, int, int, intoperators, list, operators, seq, t, t, unit, unit

The Scala Operators.scala source code

package scala.collection.parallel.benchmarks.generic






trait Operators[T] {
  
  def foreachFun: T => Unit
  def reducer: (T, T) => T
  def mediumreducer: (T, T) => T
  def filterer: T => Boolean
  def mapper: T => T
  def mapper2: T => T = error("unsupported")
  def heavymapper: T => T
  def flatmapper: T => Seq[T]
  def taker: T => Boolean
  def eachFun: T => Unit
  def eachPairFun: ((T, T)) => Unit = error("unsupported")
  def sequence(sz: Int): Seq[T] = error("unsupported")
  
}



trait IntOperators extends Operators[Int] {
  
  val foreachFun: Int => Unit = x => ()
  val reducer: (Int, Int) => Int = _ + _
  val mediumreducer: (Int, Int) => Int = (a: Int, b: Int) => {
    val result = if (b == 0) a else {
      mediumreducer.apply(b, a - b * (a / b))
    }
    result + 1000
  }
  val filterer: Int => Boolean = _ % 2 == 0
  val mapper: Int => Int = _ * 2
  val heavymapper: Int => Int = (n: Int) => {
    var i = -10
    var sum = 0
    while (i < 0) {
      sum += -i
      i += 1
    }
    n + sum
  }
  val flatmapper: Int => Seq[Int] = (n: Int) => {
    List(n, n, n, n, n)
  }
  val taker: Int => Boolean = _ < 10000
  val eachFun: Int => Unit = { n =>
    n % 2 == 0
  }
  
}