Increment elements of array by index

[Mason]

I am having a lot of trouble understanding what you mean here:

@dfdx

Indices may repeat, e.g. I = [1, 3, 1] . In this case A[1] should be updated with values in both - v[1] and v[3] .

Could you clarify?

Perhaps you can show your version that iterates over indices that will make it easier to help find a solution that is GPU friendly. Your current ‘partial solution’ errors, so I don’t really get what you’re trying to do.

Further questions:

• Does I need to be a mutable array? Can it be a CartesianIndex?