Lets say I have a computed property like this:
computed:{
rows: "buildRows(data, numCols)"
}
Where 'data' is an array and I want 'rows' to be updated any time the
anything in the 'data' array changes. Currently, polymer expressions uses a
regular observer (path observer I think) to listen for changes to the
'data' object. Unfortunately, this means that the 'rows' property is only
being updated when the 'data' array is replaced with a new object, not if
elements are added or removed. Is there any way to tell polymer to use an
ArrayObserver in this case?
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