Method get_or_try_create_with_flag

src/models/common.rs:621–636

This bool represents whether the key was found in the map or not.

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

    // This bool represents whether the key was found in the map or not.
    pub fn get_or_try_create_with_flag<F, E>(&self, k: K, f: F) -> Result<(V, bool), E>
    where
        F: FnOnce() -> Result<V, E>,
        V: Clone,
    {
        let index = self.hash_key(&k);
        let mut ht = self.hash_table_list[index].lock().unwrap();
        match ht.get(&k) {
            Some(v) => Ok((v.clone(), true)),
            None => {
                let new_v = f()?;
                ht.insert(k, new_v.clone());
                Ok((new_v, false))
            }
        }
    }

    pub fn lock_key_and_try<F, R>(&self, k: K, f: F) -> R
    where