scala "remove"不工作

Question

根据“Scala 编程”一书的第 44 页，存在用于 remove 数据结构的 list 函数。但是，当我在解释器中尝试该示例时，我不断收到错误消息。有谁知道为什么？这是一个示例

scala> val x = List(1,2,3,4,5,6,7,8,9)
x: List[Int] = List(1, 2, 3, 4, 5, 6, 7, 8, 9)

scala> x.remove(_ < 5)
<console>:9: error: value remove is not a member of List[Int]
              x.remove(_ < 5)
                ^

scala> x.remove(s => s == 5)
<console>:9: error: value remove is not a member of List[Int]
              x.remove(s => s == 5)
                ^

scala> val y = List("apple","Oranges","pine","sol")
y: List[String] = List(apple, Oranges, pine, sol)

scala> y.remove(s => s.length ==4)
<console>:9: error: value remove is not a member of List[String]
              y.remove(s => s.length ==4)

Answer 1

List 在早期版本中有一个 remove 方法，但它在 2.8 中已被弃用并在 2.9 中删除。请改用 filterNot。