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What i know:
scala> def fx(s: String *) = s.foreach(println)
fx: (s: String*)Unit
scala> val lst = List("1","2","3")
lst: List[java.lang.String] = List(1, 2, 3)
scala> fx(lst:_*)
1
2
3
What i want to know:
- How can I implement
:_*? by map?- Is there any other way that replace it?
- How :_* defined in Scala?
Thank you
It is only a syntactic sugar to indicates to the compiler that you already provide a sequence of elements, there is no other “implementation” of it. For more information, you can refer to the Scala Language Specification (§6.6, p. 78)