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Posted to issues@spark.apache.org by "Jerry Z (JIRA)" <ji...@apache.org> on 2015/08/07 21:11:46 UTC
[jira] [Updated] (SPARK-9744) Add RDD method to map with lag and
lead
[ https://issues.apache.org/jira/browse/SPARK-9744?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jerry Z updated SPARK-9744:
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Summary: Add RDD method to map with lag and lead (was: Add Java RDD method to map with lag and lead)
> 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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