连接到窗体列表scala

我想创建一个测试类列表。

 case class Person(name:String)

   case class Test (desc:String)

   val list =Seq(Person("abc"),Person("def"))
    val s = Option(list)
    private val elems = scala.collection.mutable.ArrayBuffer[Test]()
    val f =for{
      l<-s
    }yield {
      for{
        e <-l
      } yield elems+=tranform(e)

    }
    f.toSeq

    def tranform(p:Person):Test= {
    Test(desc = "Hello "+p.name)
    }

有人能帮忙做以下事情吗

1. 避免多重 for
2. 我想得到list(test(“hello abc”),test(“hello def”),而不是使用arraybuffer