Github user linbojin commented on a diff in the pull request: https://github.com/apache/spark/pull/16276#discussion_r92550699 --- Diff: core/src/main/scala/org/apache/spark/rdd/RDD.scala --- @@ -381,6 +381,14 @@ abstract class RDD[T: ClassTag]( } /** + * Return a new RDD by flattening all elements from RDD with traversable elements + */ + def flatten[U: ClassTag](implicit asTraversable: T => TraversableOnce[U]): RDD[U] = withScope { --- End diff -- @srowen I think i figured out a simpler way: ``` def flatten[U: ClassTag](implicit asTraversable: T => TraversableOnce[U]): RDD[U] = withScope { new MapPartitionsRDD[U, T](this, (context, pid, iter) => { var newIter: Iterator[U] = Iterator.empty for (x <- iter) newIter ++= asTraversable(x) newIter }) } ```
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org