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Jerry Z commented on SPARK-9744: -------------------------------- Not sure what you mean by "Why just the Java RDD?". Also, you touched on something I don't have a full grasp on. Since the java docs seem to be light on description, I don't know the full implication of the partitions. So for the SortBy() method, do I have a fully sorted RDD or only within those partitions? Does every method involving partitions neglect neighboring values? If I join two set with one being the reverse of the other, does that mean only the middle partition gets paired up? > Add Java RDD method to map with lag and lead > -------------------------------------------- > > Key: SPARK-9744 > URL: https://issues.apache.org/jira/browse/SPARK-9744 > Project: Spark > Issue Type: Wish > Reporter: Jerry Z > Priority: Minor > > To avoid zipping with index and doing numerous mapping and joins, having a > single method call to map with an additional two parameters (1: list of > offsets [(-) for lag, 0 for current and (+) for lead])) and (2:default > value). The other difference to the map function takes an argument of List<T> > and not just T. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org