Struct List 

pub struct List<T, K> { /* private fields */ }

List implements methods to work with small lists stored as a Col object. List keeps index map in the memory to reduce the access to the data in the file, so if there are too many records, List object may be consuming. The main purpose of List the is inner data management between files, data types, structeres and so on in the DBSM.

Implementations

impl<K: Clone + Eq + Hash, T: Clone + ListKeyTrait<K>> List<T, K>

pub async fn new(path: impl AsRef<Path>) -> TokioResult<Self>

Create a new List object located at path.

pub fn exists(&self, key: &K) -> bool

Check whether the key exists.

pub async fn size(&self) -> TokioResult<usize>

Size of the list.

pub async fn list(&mut self) -> TokioResult<Vec<T>>

List all records as a vector.

pub async fn map(&mut self) -> TokioResult<HashMap<K, T>>

Mapping of all records by key.

pub async fn detail(&mut self, key: &K) -> TokioResult<T>

Get record by key.

pub async fn add(&mut self, rec: &T) -> TokioResult<()>

Add a new record.

pub async fn remove(&mut self, key: &K) -> TokioResult<()>

Remove the record by key.

pub async fn modify(&mut self, key: &K, rec: &T) -> TokioResult<()>

Modify record by key.