How to apply a function to a tuple?

Question

This should be an easy one. How do I apply a function to a tuple in Scala? Viz:

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

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


        

Answer 1

Following up on the other answer, one could write (tested with 2.11.4):

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

scala> val ff = f _
ff: (Int, Int) => Int = 

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

scala> ff.tupled(p)
res0: Int = 7

See def tupled: ((T1, T2)) ⇒ R:

Creates a tupled version of this function: instead of 2 arguments, it accepts a single scala.Tuple2 argument.