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https://issues.apache.org/jira/browse/SPARK-8230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14629107#comment-14629107
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Cheng Hao commented on SPARK-8230:
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[~pedrorodriguez], actually [~TarekAuel] set a good example at
https://github.com/apache/spark/pull/7214/files, you can start get
understanding his PR first, and I would like to review your code once it's
ready.
> complex function: size
> ----------------------
>
> Key: SPARK-8230
> URL: https://issues.apache.org/jira/browse/SPARK-8230
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Assignee: Cheng Hao
>
> size(Map<K.V>): int
> size(Array<T>): int
> return the number of elements in the map or array.
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