CODEWITHSUNDEEP
scalatype-mismatch
GClaramunt
GClaramunt

Reputation: 3158

varargs puzzle?

I'm sure the answer is pretty simple, but I got stuck in this:

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)
          ^

How I build an 'Int*' ?

Upvotes: 5

Views: 438

Answers (1)

Ben James
Ben James

Reputation: 125167

To unpack a sequence into the argument list, use _*

scala> f(xs: _*)
res1: Int = 0

Upvotes: 10

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