1 files changed, 7 insertions, 0 deletions
diff --git a/core/src/ch/asynk/rustanddust/engine/util/ArrayListIt.java b/core/src/ch/asynk/rustanddust/engine/util/ArrayListIt.java
index 37e4b1f..16990eb 100644
--- a/core/src/ch/asynk/rustanddust/engine/util/ArrayListIt.java
+++ b/core/src/ch/asynk/rustanddust/engine/util/ArrayListIt.java
@@ -38,6 +38,13 @@ public class ArrayListIt<E> extends ArrayList<E> implements Iterator, Iterable<E
         return remove(0);
     }
 
+    public boolean addUnique(E e)
+    {
+        if (contains(e)) return false;
+        super.add(e);
+        return true;
+    }
+
     @Override
     @SuppressWarnings("unchecked")
     public Iterator<E> iterator()