Method get_neighbors

code/chapter08/word_ladder.rs:75–82

获取邻点

(&self)

    // 获取邻点
    fn get_neighbors(&self) -> Vec<&T> {
        let mut neighbors = Vec::new();
        for (nbr, _wt) in self.neighbors.iter() {
            neighbors.push(nbr);
        }

        neighbors
    }
}

// 图定义