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https://issues.apache.org/jira/browse/SPARK-9744?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14662296#comment-14662296
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Jerry Z edited comment on SPARK-9744 at 8/7/15 7:19 PM:
--------------------------------------------------------
Fixed! Sorry didn't know you were referring to the title. So I think for
performance sake, this would be a handy feature to have.... also saves me a
lot of typing and avoiding my code wrapping around.
On a semi-related note, why does cogroup need an iterator of the class? join()
doesn't.
(sorry for the cloned replies early, the reply button wasn't responding...)
was (Author: mrunowen):
Fixed! Sorry didn't know you were referring to the title. So I think for
performance sake, this would be a handy feature to have.... also saves me a
lot of typing and avoiding my code wrapping around.
On a semi-related note, why does cogroup need an iterator of the class? join()
doesn't.
> Add 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.
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