closure function闭包函数

“An object is data with functions. A closure is a function with data.” — John D. Cook

http://docs.scala-lang.org/tutorials/tour/automatic-closures.html

1. object TargetTest2 extends App{
2. def loop(body: =>Unit):LoopUnlessCond =new LoopUnlessCond(body)
3. protected class LoopUnlessCond(body:=>Unit){
4. def unless(cond:=>Boolean){
5. body
6. if(!cond) unless(cond)
7. }
8. }
9. var i =10
10. loop{
11. println("i = " + i)
12. i-=1
13. } unless (i==0)
14. }