How to wait N seconds between operators in Scala?

Question

I have two statements like this:

val a = 1 val b = 2 

Between the two statements, I want to pause for N seconds, as I can, in bash using the sleep command.

Answer 1

You can try:

 val a = 1 Thread.sleep(1000) // wait for 1000 millisecond val b = 2 

You can change 1000 to other values ​​to suit your needs.

Answer 2

Given:

 package object wrap { import java.time._ def delayed[A](a: => A): A = { Console println Instant.now Thread.sleep(1000L) val x = a Console println Instant.now x } } 

You can:

 Welcome to Scala 2.12.0-M3 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_60). Type in expressions for evaluation. Or try :help. scala> $intp.setExecutionWrapper("wrap.delayed") scala> { println("running"); 42 } 2016-02-20T06:28:17.372Z running 2016-02-20T06:28:18.388Z res1: Int = 42 scala> :quit