javascript - 为什么bindAttr无法使用数组

我只是很好奇为什么在我的example bindAttr中不能使用数组。它会在将来实施还是故意制造，或者我缺少什么？

车把

<script type="text/x-handlebars">
  <h1>Using bindAttr with objects</h1>
  {{#each App.residents}}
  <div {{bindAttr class="isIrish:irish"}}>{{name}}</div>
  {{/each}}
</script>

<script type="text/x-handlebars">
  <h1>Using bindAttr with arrays</h1>
  {{#each App.residents2}}
  <div {{bindAttr class="[1]:irish"}}>{{[0]}}</div>
  {{/each}}
</script>

javascript

App = Ember.Application.create({
    residents: [
        {name: "St. Patrick", isIrish: true},
        {name: "Leprechaun", isIrish: true},
        {name: "Saulius", isIrish: false},
    ],
    residents2: [
        ["St. Patrick",true],
        ["Leprechaun",true],
        ["Saulius",false],
    ]
});

最佳答案

我找到了一种使这项工作有效的方法：

<script type="text/x-handlebars">
  <h1>Using bindAttr with arrays</h1>
  {{#each resident in App.residents2}}
    <div {{bindAttr class="resident.lastObject:irish"}}>{{resident.firstObject}}</div>
  {{/each}}
</script>