Question: How would I use AngularJS `ng-repeat` to display the following HTML (Twitter Bootstrap Scaffolding)? Essentially, every third record I need to close the `</div>`, print an `<hr>`, then open another `<div class="span4">` 

```
    <div class="row">
      <div class="span4">
        <h3>
          Project A
        </h3>
      </div>
      <div class="span4">
        <h3>
          Project B
        </h3>
      </div>
      <div class="span4">
        <h3>
          Project C
        </h3>
      </div>
    </div>

    <hr>

    <div class="row">
      <div class="span4">
        <h3>
          Project D
        </h3>
      </div>
      <div class="span4">
        <h3>
          Lab Title
        </h3>
      </div>
      <div class="span4">
        <h3>
          Project E
        </h3>
      </div>
    </div>

```

I've created a fiddle for code demos.  

<http://jsfiddle.net/ADukg/261/>

Answer: 
Moving on from [the more easy answer](https://stackoverflow.com/a/11058532/1447384). I dislike the original solution because of the empty dom elements it produces. This is for 3 divs per row.

```
<div ng-controller="ModulesCtrl">
    <div class="row" ng-repeat="i in fields.range()">
        <div class="span4" ng-repeat="field in fields.slice(i,i+3)">
            <h2>{{field}}</h2>
        </div>
    </div>
</div>

```

In function FieldsCtrl($scope):

```
$scope.fields.range = function() {
    var range = [];
    for( var i = 0; i < $scope.fields.length; i = i + 3 )
        range.push(i);
    return range;
}

```

If you know fields.length you can in place of fields.range() use [0,3,6,9] etc
[ng-repeat-start and ng-repeat-end end points](https://docs.angularjs.org/api/ng/directive/ngRepeat#special-repeat-start-and-end-points) seems a convenient way to achieve this :

Which leads to simple code

```
<div ng-controller="MyCtrl">
    <div ng-repeat-start="project in projects">
        <span>
            <div class="row">
                <h3 class="span4">{{project}}</h3>
            </div
        </span>
    </div>
    <hr ng-repeat-end ng-if="($index + 1) % 3 == 0" />
</div>

```

See this [jsfiddle](http://jsfiddle.net/grafmik/c0cu64r6/1/)