Is there a iterative version of select? #1108

I'd like to iterate an Array along one axis over a set of selected indices. However I am not able to find such a method.

I notice that the fn select(&self, axis, &[Idx]) returns a copy, which is inefficient for read only iterative operation.

Is there such a method fulfill this purpose?

e.g., if there is hypothetical method, I'd like to use it in the way

for s in someArray.selected_indices(Axis(0), &[1,2,4,8,16]){
    //some read only operation to s
}