Method get_or_create

src/models/common.rs:555–570

(&self, k: K, f: F)

    }

    pub fn get_or_create<F>(&self, k: K, f: F) -> V
    where
        F: FnOnce() -> V,
        V: Clone,
    {
        let index = self.hash_key(&k);
        let mut ht = self.hash_table_list[index].lock().unwrap();
        match ht.get(&k) {
            Some(v) => v.clone(),
            None => {
                let new_v = f();
                ht.insert(k, new_v.clone());
                new_v
            }
        }
    }

    pub fn modify_or_insert<M, I>(&self, k: K, modify: M, insert: I)
    where