Inability to use $index

[ornic]

Since vs-repeat uses new trimmed collection it is impossible to use $index to refer element in original collection.

This problem can be solved by adding index inside the elements of original collection. For example, by adding this into refresh() function after originalLength = originalCollection.length;:

for (var _originalIndex = 0; _originalIndex < originalLength; _originalIndex++) {
    originalCollection[_originalIndex]._originalIndex = _originalIndex;
}

and then use it like this:

<div class="list-group" style="max-height: 80vh; overflow-y: auto;" vs-repeat>
   <div ng-repeat="group in $ctrl.coding.itemGroups track by group._originalIndex">
   ...
   </div>
</div>