warning: non-variable type argument Int in type pattern scala.collection.mutable.WrappedArray[Int] i

warning: non-variable type argument Int in type pattern scala.collection.mutable.WrappedArray[Int] is unchecked since it is eliminated by erasure

问题：
    scala> indexes.rdd.foreach{
         |       case Row(wa: WrappedArray[Int]) =>
         |         println(vocab(wa(0))+"--"+vocab(wa(1))+"--"+vocab(wa(2)))
         |     }
    <console>:64: warning: non-variable type argument Int in type pattern scala.collection.mutable.WrappedArray[Int] is unchecked since it is eliminated by erasure
                 case Row(wa: WrappedArray[Int]) =>
                              ^
解决：


1.导包
scala> import scala.reflect.runtime.universe._ 


2.增加 @unchecked


indexes.rdd.foreach{
  case Row(wa: WrappedArray[Int] @unchecked) =>
    println(vocab(wa(0))+"--"+vocab(wa(1))+"--"+vocab(wa(2)))
}


或者


val aa = indexes.rdd.map{ case Row(wa: WrappedArray[Int] @unchecked) =>
(vocab(wa(0)), vocab(wa(1)), vocab(wa(2)))
}
aa.collect().take(1).foreach(println)