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  1. import scala.util.control.TailCalls._
  2.  
  3.  
  4.  
  5. object Main {
  6.     def isEven(xs: List[Int]): TailRec[Boolean] =
  7.         if (xs.isEmpty) done(true) else tailcall(isOdd(xs.tail))
  8.  
  9.     def isOdd(xs: List[Int]): TailRec[Boolean] =
  10.         if (xs.isEmpty) done(false) else tailcall(isEven(xs.tail))
  11.  
  12.     def main(args: Array[String]) {
  13.         println(isEven((1 to 100000).toList).result.toString)
  14.     }
  15. }
Success #stdin #stdout 0.44s 383104KB
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https://ideone.com/QC6S1n
language:
Scala (scala 2.12.8)
created:
12 years ago
visibility:
public

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