48 Generic functions

first<T> returns the same type as its two arguments. Explicit type arguments here show two instantiations of one function.

T first<T>(T left, T right) {
  return left
}

main() {
  Integer number = first<Integer>(left: 7, right: 9)
  String label = first<String>(left: "Norm", right: "Java")
  printLine(number)
  printLine(label)
}

Expected output:

7
Norm

Try it: Try passing an Integer and a String in one call.

Precise rules: Reference.