Example 2

Example2.scala

def example2() = {
    val a = Future(0.5)
    val b = Future(Set(1, 2, 3))
    for {
        x <- SetF.lift(a)
        y <- SetF(b)
    } yield {
        x * y
    }
}
// Result: Future[Set(0.5, 1.0, 1.5)]