Contents

import NumberType.NumberType

object PerfectNumbers {
  def classify(n: Int): Either[String, NumberType] = {
    if (n <= 0)
      Left("Classification is only possible for natural numbers.")
    else {
      val sumOfFactors
      = (1 until n)
        .foldLeft(0)((acc, i) => if (n % i == 0) acc + i else acc)

      if (sumOfFactors < n)
        Right(NumberType.Deficient)
      else if (sumOfFactors > n)
        Right(NumberType.Abundant)
      else
        Right(NumberType.Perfect)
    }
  }
}

object NumberType extends Enumeration {
  type NumberType = Value

  val Perfect = Value("Perfect")
  val Abundant = Value("Abundant")
  val Deficient = Value("Deficient")
}

Version data entries

212 entries across 212 versions & 1 rubygems

Version	Path
trackler-2.2.1.180	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.179	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.178	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.177	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.176	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.175	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.174	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.173	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.172	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.171	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.170	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.169	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.167	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.166	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.165	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.164	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.163	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.162	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.161	tracks/scala/exercises/perfect-numbers/example.scala
trackler-2.2.1.160	tracks/scala/exercises/perfect-numbers/example.scala