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https://issues.apache.org/jira/browse/SPARK-554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Patrick Wendell updated SPARK-554:
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Summary: Add aggregateByKey (was: Add foldByKey and aggregateByKey)
> Add aggregateByKey
> ------------------
>
> Key: SPARK-554
> URL: https://issues.apache.org/jira/browse/SPARK-554
> Project: Spark
> Issue Type: New Feature
> Reporter: Matei Zaharia
> Fix For: 1.1.0
>
>
> Similar to the new fold() and aggregate() methods in #95, we should have
> foldByKey and aggregateByKey for pair RDDs. The main thing that makes this
> slightly harder is that we'll have to change the combineByKey API and
> ShuffledRDD to allow taking in a "zero value".
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