Scala example source code file (bug550.scala)

This example Scala source code file (bug550.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

list, list, monoid, monoid

The Scala bug550.scala source code

abstract class Monoid[a] {
  def unit: a
}

object test {
  def sum[a](xs: List)(implicit m: Monoid[a]): a =
    if (xs.isEmpty) m.unit else xs.head
  sum(List(1,2,3))
}