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From "Martin Junghanns (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-2905) Add intersect method to Graph class
Date Wed, 04 Nov 2015 10:24:27 GMT

    [ https://issues.apache.org/jira/browse/FLINK-2905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14989264#comment-14989264
] 

Martin Junghanns commented on FLINK-2905:
-----------------------------------------

Hi, 
this is a good idea. We need to make too many assumptions about what the user would want.
Returning {{NullValue}} as vertex value gives the user more flexibility. However, I would
like to keep the two strategies for the edges and let (1) be the default way. If this is ok,
I would update the code, rebase and create the PR.

> Add intersect method to Graph class
> -----------------------------------
>
>                 Key: FLINK-2905
>                 URL: https://issues.apache.org/jira/browse/FLINK-2905
>             Project: Flink
>          Issue Type: New Feature
>          Components: Gelly
>    Affects Versions: 0.10
>            Reporter: Martin Junghanns
>            Assignee: Martin Junghanns
>            Priority: Minor
>
> Currently, the Gelly Graph supports the set operations {{Graph.union(otherGraph)}} and
{{Graph.difference(otherGraph)}}. It would be nice to have a {{Graph.intersect(otherGraph)}}
method, where the resulting graph contains all vertices and edges contained in both input
graphs.



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