A nice example of using for/yield in Scala, copied from Learning Functional Programming without Growing a Neckbeard (http://www.youtube.com/watch?v=OOvL6QAxRK4)

good_ice_creams.scala

def goodPairings(pies: List[Pie], iceCreams: List[IceCream]): List(Serving[Pie, IceCream]) {  
    for {
        p <- pies
        i <- iceCreams
        var serving = new Serving(p, i)
        if (serving.isGood)
    } yield {
        serving
    }
}