update example more useful

README.md

@@ -387,15 +387,19 @@ counterReducer(0, increment()); // => 1
 
 A default handler can be attached, which is invoked for all actions not associated with a handler.
 ```ts
-const add = createAction('todos/ADD', length => length)<number>();
-const reset = createAction('', () => 0)<number>();
-const counterReducer = createReducer(0)
-  .handleAction(add, (state, action) => state + action.payload)
-  .defaultHandler((state, action) => state = action.payload);
-
-const store = createStore(counterReducer);
-store.dispatch(add(3));
-store.dispatch(reset());
+const increment = createAction('counter/INCREMENT')<number>();
+const decrement = createAction('counter/DECREMENT')<number>();
+const initialState = 0;
+const counterReducer = createReducer(initialState)
+  .handleAction(increment, (state, action) => state + action.payload)
+  .handleAction(decrement, (state, action) => state - action.payload)
+  .defaultHandler(() => initialState);
+const otherAction = createAction('others/ACTION', () => null)();
+
+const store = createStore(counterReducer); // => 0
+store.dispatch(increment(3)); // => 3
+store.dispatch(decrement(2)); // => 2
+store.dispatch(ohterAction()); // => 0
 ```
 
 #### Alternative usage with regular switch reducer