diff --git a/app/src/main/java/com/mindorks/kotlinFlow/learn/retrofit/parallel/ParallelNetworkCallsViewModel.kt b/app/src/main/java/com/mindorks/kotlinFlow/learn/retrofit/parallel/ParallelNetworkCallsViewModel.kt
index 2d92677..08bd082 100644
--- a/app/src/main/java/com/mindorks/kotlinFlow/learn/retrofit/parallel/ParallelNetworkCallsViewModel.kt
+++ b/app/src/main/java/com/mindorks/kotlinFlow/learn/retrofit/parallel/ParallelNetworkCallsViewModel.kt
@@ -31,10 +31,7 @@ class ParallelNetworkCallsViewModel(
             users.postValue(Resource.loading(null))
             apiHelper.getUsers()
                 .zip(apiHelper.getMoreUsers()) { usersFromApi, moreUsersFromApi ->
-                    val allUsersFromApi = mutableListOf<ApiUser>()
-                    allUsersFromApi.addAll(usersFromApi)
-                    allUsersFromApi.addAll(moreUsersFromApi)
-                    return@zip allUsersFromApi
+                    usersFromApi + moreUsersFromApi
                 }
                 .flowOn(Dispatchers.Default)
                 .catch { e ->
diff --git a/app/src/main/java/com/mindorks/kotlinFlow/learn/room/RoomDBViewModel.kt b/app/src/main/java/com/mindorks/kotlinFlow/learn/room/RoomDBViewModel.kt
index fbdef08..cfee7b3 100644
--- a/app/src/main/java/com/mindorks/kotlinFlow/learn/room/RoomDBViewModel.kt
+++ b/app/src/main/java/com/mindorks/kotlinFlow/learn/room/RoomDBViewModel.kt
@@ -29,17 +29,14 @@ class RoomDBViewModel(private val apiHelper: ApiHelper, private val dbHelper: Da
                     if (usersFromDb.isEmpty()) {
                         return@flatMapConcat apiHelper.getUsers()
                             .map { apiUserList ->
-                                val userList = mutableListOf<User>()
-                                for (apiUser in apiUserList) {
-                                    val user = User(
+                                apiUserList.map { apiUser ->
+                                    User(
                                         apiUser.id,
                                         apiUser.name,
                                         apiUser.email,
                                         apiUser.avatar
                                     )
-                                    userList.add(user)
                                 }
-                                userList
                             }
                             .flatMapConcat { usersToInsertInDB ->
                                 dbHelper.insertAll(usersToInsertInDB)