Scala Tuple10 隐式排序不起作用

Question

我可以得到 Tuple9 的比较方法，如下所示：

  import scala.math.Ordered.orderingToOrdered
  (1,2,"ab",4,5,6.0,7l,"de",1.0) compare (1,2,"ab",4,5,6.0,7l,"de",1.0)

但是使用 Tuple10 时出现编译错误：

  import scala.math.Ordered.orderingToOrdered
  (1,2,"ab",4,5,6.0,7l,"de",1.0,2) compare (1,2,"ab",4,5,6.0,7l,"de",1.0,2) // >> compile error: value compare is not a member of (Int, Int, String, Int, Int, Double, Long, String, Double, Int)

我尝试了替代方法，但也给出了隐含错误：

implicitly[Ordering[Tuple10[Int, Int, String, Int, Int, Double, Long, String, Double, Double]]].compare((1,2,"ab",4,5,6.0,7l,"de",1.0,4), (1,2,"ab",4,5,6.0,7l,"de",1.0,4)) 

compiler error:
No implicit Ordering defined for (Int, Int, String, Int, Int, Double, Long, String, Double, Double).
not enough arguments for method implicitly: (implicit e: Ordering[(Int, Int, String, Int, Int, Double, Long, String, Double, Double)])Ordering[(Int, Int, String, Int, Int, Double, Long, String, Double, Double)]. Unspecified value parameter e.

似乎只为 Tuple9 定义了排序。如果我错了请纠正我。

Answer 1

从source code可以看出，你是对的，它只转到 Tuple9。但是在您看到每次迭代中的模式之后，您应该能够根据需要复制和扩展它。

Scala Tuple10 隐式排序不起作用

Scala Tuple10 implicit ordering not working

scala

implicit