Question regarding multi-level each

[Jezternz]

Hi, I am looking for a templating engine and handlebars looks pretty great!
However I have some rather advanced requirements and I am not sure if handlebars is capable, or if it is,
what the syntax should look like. I have tried below to describe my problem.
eg given the following json structures:

var x = [{"XX":1},{"XX":3}];
var z = [
  "a":{
    1:{"Q":"A"},
    2:{"Q":"B"},
    3:{"Q":"C"},
    4:{"Q":"D"}
  }
];

I need to be able to template something like this:

<ul>
{{#each x}}
  {{#each z.a.(this.XX).Q}}
    <li>Item - {{this}}</li>
  {{/each}}
{{/each}}
</ul>

// Where 'this' refers to the element from the most outer loop
and output something like this:

<ul>
  <li>Item A</li>
  <li>Item C</lI>
</ul>

Any ideas on whether this is possible and what the template syntax should look like would be great! (Or any plans for future implementation).

[kpdecker]

This is basically the same issue as #569. We don't currently support index type operators but helpers can provide this in the mean time as discussed over there.