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Posted to issues@spark.apache.org by "Hans Uhlig (JIRA)" <ji...@apache.org> on 2014/06/26 17:50:24 UTC

[jira] [Commented] (SPARK-2280) Java & Scala reference docs should describe function reference behavior.

    [ https://issues.apache.org/jira/browse/SPARK-2280?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14044780#comment-14044780 ] 

Hans Uhlig commented on SPARK-2280:
-----------------------------------

This looks to be partially done for the Python docs although some more complex examples might be better.

> Java & Scala reference docs should describe function reference behavior.
> ------------------------------------------------------------------------
>
>                 Key: SPARK-2280
>                 URL: https://issues.apache.org/jira/browse/SPARK-2280
>             Project: Spark
>          Issue Type: Improvement
>          Components: Documentation
>    Affects Versions: 1.0.0
>            Reporter: Hans Uhlig
>
> Example
> <K> JavaPairRDD<K,Iterable<T>> groupBy(Function<T,K> f)
> Return an RDD of grouped elements. Each group consists of a key and a sequence of elements mapping to that key. 
> T and K are not described and there is no explanation of what the function's inputs and outputs should be and how GroupBy uses this information.



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