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

In Scala 2.8 and newer:

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

// Note the underscore after the f
scala> val ff = f _
ff: (Int, Int) => Int = 

scala> val fft = ff.tupled
fft: ((Int, Int)) => Int = 

In Scala 2.7:

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

// Note the underscore after the f
scala> val ff = f _
ff: (Int, Int) => Int = 

scala> val fft = Function.tupled(ff)
fft: ((Int, Int)) => Int =