javascript - 为什么 bindAttr 不适用于数组

Question

我只是好奇为什么在我的 example 中bindAttr 不适用于数组。它是将来会实现还是故意制作的，还是我遗漏了一些东西？

Handlebars

<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],        
    ]
});

​

Answer 1

我找到了一种方法来完成这项工作:

<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>

​