File: t550.scala

package info (click to toggle)
scala 2.11.12-6
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 62,924 kB
  • sloc: javascript: 28,808; java: 13,415; xml: 3,135; sh: 1,620; python: 756; makefile: 38; awk: 36; ansic: 6
file content (9 lines) | stat: -rw-r--r-- 170 bytes parent folder | download | duplicates (8) 
1
2
3
4
5
6
7
8
9
 
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))
}