Method get

publication/code/chapter06/hashmap.rs:165–168

获取 val 的引用及可变引用

(&self, key: usize)

    // 获取 val 的引用及可变引用
    fn get(&self, key: usize) -> Option<&T> {
        let curr = self.get_pos(key);
        self.data.get(curr)
    }

    fn get_mut(&mut self, key: usize) -> Option<&mut T> {
        let curr = self.get_pos(key);