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https://issues.apache.org/jira/browse/SPARK-10296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14720706#comment-14720706
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holdenk commented on SPARK-10296:
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mapValues won't expose the key that its being operated on (its possible to have
something where you aren't going to change the key but the change to the value
depends on in part the key).
> add preservesParitioning parameter to RDD.map
> ---------------------------------------------
>
> Key: SPARK-10296
> URL: https://issues.apache.org/jira/browse/SPARK-10296
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Esteban Donato
> Priority: Minor
>
> It would be nice to add the Boolean parameter preservesParitioning with
> default false to RDD.map method just as it is in RDD.mapPartitions method.
> If you agree I can submit a pull request with this enhancement.
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