How to iterate over DataSet elements without converting it to List

[subash basnet]

Hello there,

I have been stuck on how to iterate over the DataSet, perform operations
and return a new modified DataSet similar to that of list operation as
shown below.
Eg:
for (Centroid centroid : centroids.collect()) {
    for (Tuple2<Integer, Point> element : clusteredPoints.collect()) {
       //perform necessary operations
     }
//add elements
}
//return elements list

I need to iterate over dataSet without converting it to List.


Best Regards,
Subash Basnet