How do I use nested iterators with Mustache.js or Handlebars.js?

I would like to use handlebars.js or mustache.js to iterate over a list of families, and then iterate over that family's members. Inside of both loops, I want to display properties of both. However, once I get into the second iteration, none of the family variables are visible.

{{#each families}}
  {{#each members}}
    <p>{{ ( here I want a family name property ) }}</p>
    <p>{{ ( here I want a member name property ) }}</p>
  {{/each}}
{{/each}}

Is this possible? I'd greatly appreciate any help!

Solution

You can nest sections easily with lists of objects. Use a data structure where families is a list that has an object members that has a list of any objects (or even more lists)like:

{
  "families" : [
        {
          "surname": "Jones",
          "members": [
            {"given": "Jim"},
            {"given": "John"},
            {"given": "Jill"}
          ]
        },
        {
          "surname": "Smith",
          "members": [
            {"given": "Steve"},
            {"given": "Sally"}
          ]
        }
      ]
}

You would be able to populate a template like:

<ul>
    {{#families}}
    <li>{{surname}}
      <ul>
        {{#members}}
        <li>{{given}}</li>
        {{/members}}
      </ul>
    </li>
    {{/families}}
  </ul>

jsFiddle is currently down so here's the full working HTML with JS:

<!DOCTYPE html>
<head>

  <script src="http://cdnjs.cloudflare.com/ajax/libs/mustache.js/0.3.0/mustache.min.js"></script>
  <script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
  <script>
    $(function() {
      var tpl = $('#fam').html(),
        data = {
          "families" : [
            {
              "surname": "Jones",
              "members": [
                {"given": "Jim"},
                {"given": "John"},
                {"given": "Jill"}
              ]
            },
            {
              "surname": "Smith",
              "members": [
                {"given": "Steve"},
                {"given": "Sally"}
              ]
            }
          ]
        },
        html = Mustache.to_html(tpl, data);

        $("#main").append(html);

    });
  </script>

</head>

<div id="main"></div>

<script type="template/text" id="fam">
  <ul>
    {{#families}}
    <li>{{surname}}
      <ul>
        {{#members}}
        <li>{{given}}</li>
        {{/members}}
      </ul>
    </li>
    {{/families}}
  </ul>
</script>