// ConnectedComponents returns the connected components of the undirected graph g.
func ConnectedComponents(g graph.Undirected) [][]graph.Node {
var (
w traverse.DepthFirst
c []graph.Node
cc [][]graph.Node
)
during := func(n graph.Node) {
c = append(c, n)
}
after := func() {
cc = append(cc, []graph.Node(nil))
cc[len(cc)-1] = append(cc[len(cc)-1], c...)
c = c[:0]
}
w.WalkAll(g, nil, after, during)
return cc
}
