Angular filter in ng-repeat with sum on value length

angular-filter-length.js

<!-- If I want to hide done todos -->
<ul class="whatever">
    <li data-ng-repeat="todo in todos | filter:{done: false}">
        ...
    </li>
</ul>

<!-- Show done todos -->
<div class="whatever" data-ng-show="(todos | filter:{done: true} ).length > 0">
    ...
</div>

<!-- sums -->
<div class="whatever">
    <div>All: {{todos.length}}</div>
    <div>Incomplete: {{(todos | filter:{done: false}).length}}</div>
    <div>Done: {{(todos | filter:{done: true}).length}}</div>
</div>

There is more here : http://jsfiddle.net/mhevery/bpTXe/148/