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https://issues.apache.org/jira/browse/SPARK-6510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14380262#comment-14380262
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Brennon York commented on SPARK-6510:
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Whoops, thanks for catching that!
> Add Graph#minus method to act as Set#difference
> -----------------------------------------------
>
> Key: SPARK-6510
> URL: https://issues.apache.org/jira/browse/SPARK-6510
> Project: Spark
> Issue Type: Improvement
> Components: GraphX
> Reporter: Brennon York
>
> Right now GraphX does not have a Set#difference method to operate on
> VertexIds. We do however have a {{diff}} method although that works on
> values. Given the optimizations of tombstoning already present this method
> can be implemented in a very efficient manner.
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