Method degree

src/graph/undirected/graph.rs:74–76

compute the degree of v

(&self, v: usize)

impl Graph {
    /// compute the degree of v
    pub fn degree(&self, v: usize) -> usize {
        self.adj(v).fold(0, |acc, _| acc + 1)
    }

    /// compute maximum degree
    pub fn max_degree(&self) -> usize {