}
data class BoardCellClass(override val x: Int, override val y: Int, override var player: BoardCell
data class Request(val board: MutableList<MutableLi
在我的Scala2.9.2队列上操作时,我得到了一个很少见的NoSuchElementException错误。我不理解这个异常,因为队列中有元素。简化后的代码如下所示:...$class.head(LinkedListLike.scala:76)
at scala.collection.mutable.LinkedList.head(LinkedList.sc