scala 可变列表

把所有负数都改为零

object multableList {def main(args: Array[String]): Unit = {val lst = scala.collection.mutable.LinkedList(1,-2,7,-9)var cur = lstwhile (cur!=Nil){if(cur.elem<0) cur.elem = 0
      cur = cur.next  }lst.foreach(println _)}
}