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From "Jerry Z (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-9744) Add Java RDD method to map with lag and lead
Date Fri, 07 Aug 2015 17:15:45 GMT

     [ https://issues.apache.org/jira/browse/SPARK-9744?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jerry Z updated SPARK-9744:
---------------------------
    Summary: Add Java RDD method to map with lag and lead  (was: Add RDD method to map with
lag and lead)

> 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
>
> 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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