diff options
| -rw-r--r-- | sources/scala/List.scala | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sources/scala/List.scala b/sources/scala/List.scala index 34f7d7cf3d..503dc8b083 100644 --- a/sources/scala/List.scala +++ b/sources/scala/List.scala @@ -315,7 +315,7 @@ trait List[a] extends Seq[a] { * @return this list without the elements of the given list <code>that</code>. */ def diff(that: List[a]): List[a] = - if (that.isEmpty) this + if (this.isEmpty || that.isEmpty) this else { val result = this.tail diff that; if (that contains this.head) result else this.head :: result; |