Javascript 独占选择列表元素

我有一份无序的清单：

<ul>
    <li ng-class="{ 'active': selected }" ng-click="selected = !selcted">Stuff 1</li>
    <li ng-class="{ 'active': selected }" ng-click="selected = !selcted">Stuff 2</li>
    <li ng-class="{ 'active': selected }" ng-click="selected = !selcted">Stuff 3</li>
</ul>

1
2
3

---

我想对用户选择的列表项应用一个类。一次只能有一个项具有该类。最好的方法是什么？大约有十几个元素，所以我不想为每个项目声明一个新变量。

为每个项目设置一个属性：

<ul>
    <li ng-class="{ 'active': selected == 1 }" ng-click="selected = 1">Stuff 1</li>
    <li ng-class="{ 'active': selected == 2 }" ng-click="selected = 2">Stuff 2</li>
    <li ng-class="{ 'active': selected == 3 }" ng-click="selected = 3">Stuff 3</li>
</ul>

1
2
3

如果需要，请使用ng repat

HTML

---

我希望人们能解释他们的反对票：）

<ul ng-repeat="s in stuffs">
    <li ng-class="{active:$index==selected}" ng-click="selected=$index">{{s}}</li>
</ul>

$scope.stuffs = ['Stuff 1', 'Stuff 2', 'Stuff 3'];