相关疑难解决方法(0)

如何将带有(例如)3个元素的列表转换为3个元组？

例如,假设我有val x = List(1, 2, 3),我想将其转换为(1, 2, 3).我怎样才能做到这一点？

这应该很简单.如何将函数应用于Scala中的元组？即:

scala> def f (i : Int, j : Int) = i + j
f: (Int,Int)Int

scala> val p = (3,4)
p: (Int, Int) = (3,4)

scala> f p
:6: error: missing arguments for method f in object $iw;
follow this method with `_' if you want to treat it as a partially applied function
       f p
       ^

scala> f _ p
:6: error: value p is not a member of (Int, Int) => Int
       f _ p
           ^

scala …