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https://issues.apache.org/jira/browse/FLINK-1450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14362322#comment-14362322
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ASF GitHub Bot commented on FLINK-1450:
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Github user gyfora commented on the pull request:
https://github.com/apache/flink/pull/481#issuecomment-80941940
Hey,
I squashed some of your small fix commits to your last, one and also fixed
several minor issues:
-I swapped the type parameter order to make the type extraction work
properly
-I made the parameter order consistent through the scala and java api
-The GroupedFoldInvokable completely disregarded the first element in the
stream (also the test logic for this class was broken)
-And some minor windowing related stuff
I didnt include your last commit since I already added those fixes to yours.
> Add Fold operator to the Streaming api
> --------------------------------------
>
> Key: FLINK-1450
> URL: https://issues.apache.org/jira/browse/FLINK-1450
> Project: Flink
> Issue Type: New Feature
> Components: Streaming
> Affects Versions: 0.9
> Reporter: Gyula Fora
> Priority: Minor
> Labels: starter
>
> The streaming API currently doesn't support a fold operator.
> This operator would work as the foldLeft method in Scala. This would allow
> effective implementations in a lot of cases where a the simple reduce is
> inappropriate due to different return types.
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