wat.scala

import scala.concurrent.Future
import scala.concurrent.ExecutionContext.Implicits.global
val x = 5
val y = 6

def makeFuture(text: String) = Future { println(text) }

for {
    foo <- makeFuture("hi") if x == 5
    bar <- makeFuture("yo") if y == 4
    yar <- makeFuture("whattup")
} yield ()