X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.scl.runtime%2Fsrc%2Forg%2Fsimantics%2Fscl%2Fruntime%2FLists.java;h=99c19d6b951cbe26c140d13b3ed8dcbc2aefbf06;hp=5259ce6315a38b5b9b1ab64f94ce452cb82930ca;hb=e65cd7676f6e843e34a8501afc57f56cbc8602d3;hpb=3d043320cdee8dda92758f4ea1c324a82c7d9094

diff --git a/bundles/org.simantics.scl.runtime/src/org/simantics/scl/runtime/Lists.java b/bundles/org.simantics.scl.runtime/src/org/simantics/scl/runtime/Lists.java
index 5259ce631..99c19d6b9 100644
--- a/bundles/org.simantics.scl.runtime/src/org/simantics/scl/runtime/Lists.java
+++ b/bundles/org.simantics.scl.runtime/src/org/simantics/scl/runtime/Lists.java
@@ -240,7 +240,19 @@ public class Lists {
             }
         };
     }
-    
+
+    public static Function indexSet(List<Object> l) {
+        THashSet set = new THashSet(l.size());
+        for(Object obj : l)
+            set.add(obj);
+        return new FunctionImpl1<Object,Object>() {
+            @Override
+            public Object apply(Object p0) {
+                return set.contains(p0);
+            }
+        };
+    }
+
     public static Function indexBy(Function f, List l) {
         THashMap map = new THashMap(l.size());
         for(Object o : l)