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https://issues.apache.org/jira/browse/SPARK-9613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14659811#comment-14659811
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Sean Owen commented on SPARK-9613:
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+1 and I'd like to work on this for 1.6. There are a lot of accidental
translations to Java and back just because a Java collections method was
invoked on a Scala collection when there's an entirely suitable Scala method.
It's a big cross-cutting change but worth it.
> Ban use of JavaConversions and migrate all existing uses to JavaConverters
> --------------------------------------------------------------------------
>
> Key: SPARK-9613
> URL: https://issues.apache.org/jira/browse/SPARK-9613
> Project: Spark
> Issue Type: Improvement
> Reporter: Josh Rosen
>
> Spark's style checker should ban the use of Scala's JavaConversions, which
> provides implicit conversions between Java and Scala collections types.
> Instead, we should be performing these conversions explicitly using
> JavaConverters (or forgoing the conversions altogether if they're occurring
> inside of performance-critical code).
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