use toggle rather than ternary with add/remove

todo-example/dojo/js/todo/app.js

@@ -94,8 +94,8 @@ define(["dojo/_base/declare",
          * we a number of completed and incomplete todo items.
          */
         onItemStatusUpdate: function () {
-            domClass[this.model.complete.value > 0 ? "add" : "remove" ](this.todo_stats, "items_selected");
-            domClass[this.model.todos.get("length") ? "add" : "remove" ](this.todo_stats, "items_present");
+            domClass.toggle(this.todo_stats, "items_selected", this.model.complete.value > 0);
+            domClass.toggle(this.todo_stats, "items_present", this.model.todos.get("length"));
         },
 
         /**