Scala example source code file (arrays.scala)

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Java - Scala tags/keywords

array, array, generic, generic, spec, spec, t, t, test

The Scala arrays.scala source code

import runtime.ScalaRunTime._


class Generic[T](a: Array[T]) {
  def apply() = a(0)
}


class Spec[@specialized(AnyRef) T](a: Array[T]) {
  def apply() = a(0)
}


object Test {
  
  def main(args: Array[String]) {
    val len = 50
    
    testSpec(new Array[String](len))
    println(arrayApplyCount)
    
    (new Spec(new Array[String](len)))()
    println(arrayApplyCount)
    
    testGeneric(new Array[String](len))
    println(arrayApplyCount)
    
    (new Generic(new Array[String](len)))()
    println(arrayApplyCount)
  }
  
  def testGeneric[T](a: Array[T]) = {
    var i = 0
    var sum = 0
    while (i < a.length) {
      sum += (if (a(i) != null) 1 else 0)
      i += 1
    }
    sum
  }
  
  def testSpec[@specialized(AnyRef) T](a: Array[T]) = {
    var i = 0
    var sum = 0
    while (i < a.length) {
      sum += (if (a(i) != null) 1 else 0)
      i += 1
    }
    sum
  }
  
}