Method get_connects

code/chapter08/graph_adjlist.rs:33–40

获取相邻的点集合

(&self)

    // 获取相邻的点集合
    fn get_connects(&self) -> Vec<&T> {
        let mut connects = Vec::new();
        for (nbr, _wt) in self.connects.iter() {
            connects.push(nbr);
        }

        connects
    }

    // 返回到邻点的边权重
    fn get_nbr_weight(&self, key: &T) -> &i32 {