Angular; How do I update an ordered array using itemindex

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AngularJs

Hi,

I have a table which I can sort by columns by using the orderBy filter in an ng-repeat row. I have a context menu that can make updates to that item up updates the row:

['Run Api', function ($itemScope) {
   var item = {};
   angular.copy($itemScope.item, item); //get the item from the repeat row
   item.ApiDiff = "spinner"; //change the current image to a spinner
   angular.copy(item, $scope.Items[$itemScope.$index]); //copy the item back to the array
   //Do some other stuff and get the new value for ApiDiff
}]

(I have a function that returns a green up arrow for positive numbers, a red down arrow for negative and a spinner.gif for the word "spinner". This is an easy way of setting the image to a spinner while we wait for the updated result)

The issue I have is that $itemScope.$index is the index of the item in the ordered array whereas $scope.Items is the un-ordered array. With sorting on, I get a miss match.

How do I update the original item in the array?

Thanks ^_^
Andy