Github user andralungu commented on a diff in the pull request:
https://github.com/apache/flink/pull/807#discussion_r31930812
--- Diff:
flink-staging/flink-gelly/src/main/java/org/apache/flink/graph/Graph.java ---
@@ -1233,6 +1233,34 @@ public void coGroup(Iterable<Edge<K, EV>> edge,
Iterable<Edge<K, EV>> edgeToBeRe
return new Graph<K, VV, EV>(unionedVertices, unionedEdges,
this.context);
}
+ /**
+ * Performs Difference on the vertices and edges sets of the
inputgraphs
+ * removes both vertices and edges with the vertex as a source/target
+ * @param graph the graph to perform differennce with
+ * @return a new graph
--- End diff --
a new graph where the common vertices and edges have been removed
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