use a Vector as accumulator of map.traverse (#1633)

vavr-io · Nov 21, 2016 · 8dc38ca · 8dc38ca
1 parent 101cbe4
commit 8dc38ca
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/javaslang/src/main/java/javaslang/collection/Map.java b/javaslang/src/main/java/javaslang/collection/Map.java
@@ -190,7 +190,7 @@ default <U> U transform(Function<? super Map<K, V>, ? extends U> f) {
 
     default <U> Seq<U> traverse(BiFunction<K, V, ? extends U> mapper) {
         Objects.requireNonNull(mapper, "mapper is null");
-        return foldLeft(List.empty(), (acc, entry) -> acc.append(mapper.apply(entry._1, entry._2)));
+        return foldLeft(Vector.empty(), (acc, entry) -> acc.append(mapper.apply(entry._1, entry._2)));
     }
 
     default <T1, T2> Tuple2<Seq<T1>, Seq<T2>> unzip(BiFunction<? super K, ? super V, Tuple2<? extends T1, ? extends T2>> unzipper) {