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https://issues.apache.org/jira/browse/FLINK-1023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14071493#comment-14071493
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Chesnay Schepler commented on FLINK-1023:
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is it not possible to provide an object that implements both Iterable and
Iterator?
> Provide Iterable instead of Iterator to grouped functions
> ---------------------------------------------------------
>
> Key: FLINK-1023
> URL: https://issues.apache.org/jira/browse/FLINK-1023
> Project: Flink
> Issue Type: Wish
> Components: Java API
> Reporter: Ufuk Celebi
> Priority: Trivial
> Labels: breaking-api
>
> I would like the grouped functions to provide an Iterable instead of an
> Iterator to the user, e.g. for the {{reduce}} method of
> {{GroupReduceFunction}}.
> We had a discussion about this previously (I couldn't find the respective
> issues/list threads right now) and the result was in favor of the change.
> We never got around to really push for it, because of the API break. With the
> renaming, it should be less of an issue.
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