Add ::: to NonEmptyList

typelevel · Oct 4, 2017 · 6ea2425 · 6ea2425
1 parent c131fe4
commit 6ea2425
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/core/src/main/scala/cats/data/NonEmptyList.scala b/core/src/main/scala/cats/data/NonEmptyList.scala
@@ -82,6 +82,9 @@ final case class NonEmptyList[+A](head: A, tail: List[A]) {
   def ::[AA >: A](a: AA): NonEmptyList[AA] =
     NonEmptyList(a, head :: tail)
 
+  def :::[AA >: A](other: NonEmptyList[AA]): NonEmptyList[AA] =
+    other.concat(this)
+
   /**
    * Remove elements not matching the predicate
    *