diff --git a/.gitignore b/.gitignore
index fb5b676..d050424 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@
 *.gz
 *.iso
 *.jar
+!gradle/wrapper/gradle-wrapper.jar
 *.rar
 *.tar
 *.zip
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..71b37f0
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 442ea23..a484112 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.5-bin.zip
diff --git a/src/main/java/learnrxjava/ComposableListExercises.java b/src/main/java/learnrxjava/ComposableListExercises.java
index a13940c..efe3648 100644
--- a/src/main/java/learnrxjava/ComposableListExercises.java
+++ b/src/main/java/learnrxjava/ComposableListExercises.java
@@ -127,11 +127,11 @@ public <R> ComposableList<R> map(Function<T, R> projectionFunction) {
             // Note that you can apply a projectionFunction to a value like this:
             //  projectionFunction.apply(5)
             // ------------ INSERT CODE HERE! ----------------------------
-            
+            results.add(projectionFunction.apply(itemInList));
         });
         
-        //return results;
-        throw new UnsupportedOperationException("Not implemented yet.");
+        return results;
+//        throw new UnsupportedOperationException("Not implemented yet.");
     }
     
     /*