Hello world!

ember/app/utils/menu.js

@@ -0,0 +1,33 @@
+import Ember from 'ember';
+
+import NamedContainerView from './named-container-view';
+import MenuItemSeparator from '../components/menu-item-separator';
+
+export default NamedContainerView.extend({
+
+    tagName: 'ul',
+
+    active: null,
+
+    i: 1,
+    addSeparator: function(index) {
+        var item = MenuItemSeparator;
+        this.addItem('separator'+(this.i++), item, index);
+    },
+
+    activeChanged: function() {
+        var active = this.get('active');
+        if (typeof active != 'array') {
+            active = [active];
+        }
+
+        var namedViews = this.get('namedViews');
+        var view;
+        for (var name in namedViews) {
+            if (namedViews.hasOwnProperty(name) && (view = namedViews.get(name))) {
+                view.set('active', active.indexOf(name) !== -1);
+            }
+        }
+    }.observes('active')
+
+});