fork download 
  1. class Lazy[A](thunk : () => A) {
  2.   lazy val body = thunk()
  3. }
  4.  
  5. object Lazy {
  6.   def lazy_[A](x : => A) = new Lazy(() => x)
  7.   def force[A](x : Lazy[A]) = x.body
  8. }
  9.  
  10. object Main {
  11.   def getX() = {
  12.     println("hello")
  13.     3
  14.   }
  15.   def main(args: Array[String]) {
  16.     import Lazy._
  17.     val x = lazy_(getX())
  18.     println("start")
  19.     println(x)
  20.     println(x)
  21.     println(x)
  22.   }
  23. }
Success #stdin #stdout 0.15s 211584KB
comments (?)
stdin 
Standard input is empty
stdout 
start
Lazy@2e7263
Lazy@2e7263
Lazy@2e7263
https://ideone.com/0dvgJ
language:
Scala (scala 2.12.8)
created:
14 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!