Port transitivity to rustworkx-core #1482
Merged
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This ports the undirected graph and directed graph transitivity functions to rustworkx-core (#1121).
While this is mostly a copy and paste, I changed for loops to iterators and
HashSet::remove
for afilter
when constructing the set.I think the functions
digraph_node_triangles
andgraph_node_triangles
that count the triangles of a vertex could be part of the public API. Implementing the local clustering is direct using these functions while it doesn't seem part of rustworkx right now.