Add Func helpe

Author: mythz

src/AndroidClient/client/src/main/java/net/servicestack/client/Func.java

@@ -0,0 +1,19 @@
+package net.servicestack.client;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Func {
+    public static interface Function<T,R> {
+        public R apply(T t);
+    }
+
+    public static <T,R> ArrayList<R> map(List<T> xs, Function<T,R> f) {
+        ArrayList<R> to = new ArrayList<>();
+        for (T x : xs) {
+            R ret = f.apply(x);
+            to.add(ret);
+        }
+        return to;
+    }
+}