Method insert

src/models/common.rs:520–524

(&self, k: K, v: V)

    }

    pub fn insert(&self, k: K, v: V) {
        let index = self.hash_key(&k);
        let mut ht = self.hash_table_list[index].lock().unwrap();
        ht.insert(k, v);
    }

    pub fn delete(&self, k: &K) {
        let index = self.hash_key(k);