题
我敢肯定的答案非常简单,但我被困在此:
Welcome to Scala version 2.7.1.final (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_14).
Type in expressions to have them evaluated.
Type :help for more information.
scala> def f(x:Int*)=0
f: (Int*)Int
scala> val xs:Seq[Int]=1::2::3::4::Nil
xs: Seq[Int] = List(1, 2, 3, 4)
scala> f (xs)
<console>:7: error: type mismatch;
found : Seq[Int]
required: Int
f (xs)
^
我如何建立一个 '诠释*'?
解决方案
要解压缩的序列到参数列表,使用_*
scala> f(xs: _*)
res1: Int = 0
不隶属于 StackOverflow