相关疑难解决方法(0)

我想知道request.body.asFormUrlEncoded包含deviceId与否.

val formValues=request.body.asFormUrlEncoded
val number = formValues.get("mobile").head
var deviceId ="deviceIdNotFound"
if(condtion) //thats the problem
deviceId= formValues.get("deviceId").head

是否有任何方式的conatins或任何其他功能 Option[Map[String,Seq[String]]]

我有一个清单

val first = List("A","B","C","D")

我想从它创建一个新列表,但只更改最后一个元素:

val newLastVal = "E"
val second = List("A","B","C","E")

无法想出这一个!提前致谢