Question

I have a function like so:

def print(name:String, surname:String) { println(name + " " + surname) }

I also have a Tuple2:

val johnsmith = ("John", "Smith")

When I call print with johnsmith I get the following error:

scala> print(johnsmith)                                                       

error: not enough arguments for method print: (name: String,surname: String)Unit.
Unspecified value parameter surname.
       print(johnsmith)
            ^

Is there some way around this? I can get this to work by making print accept a Tuple2:

def print2(t:Tuple2[String,String]) { println(t._1 + " " + t._2) }

Now I can call it either way:

scala> print2(johnsmith)
John Smith

scala> print2("john", "smith")
john smith

Is there something I’m missing?

Answer 1

First convert the method to a function, and then convert the function of two args into a function of one tuple.

Function.tupled(print _)(johnsmith)