Struct recoreco::stats::DataDictionary

pub struct DataDictionary { /* private fields */ }

Mapping from original string based identifiers to internal u32 indexes.

Implementations

impl DataDictionary

pub fn num_users(&self) -> usize

Returns the overall number of users in the dataset.

pub fn num_items(&self) -> usize

Returns the overall number of items in the dataset.

pub fn num_interactions(&self) -> u64

Returns the overall number of interactions in the dataset.

pub fn user_index(&self, name: &str) -> &u32

Returns the internal index for the user with the string identifier name

pub fn item_index(&self, name: &str) -> &u32

Returns the internal index for the item with the string identifier name

pub fn from_owned<T>(interactions: T) -> Selfwhere
    T: Iterator<Item = (String, String)>,

Builds up a DataDictionary by consuming an iterator over string tuples representing user-item interactions. We assume that the first string in the tuple identifies a user and the second string identifies an item

pub fn from<'a, T>(interactions: T) -> DataDictionarywhere
    T: Iterator<Item = &'a (String, String)>,

Builds up a DataDictionary by reading an iterator over references to string tuples representing user-item interactions. We assume that the first string in the tuple identifies a user and the second string identifies an item

Trait Implementations

impl From<DataDictionary> for Renaming

Consume a DataDictionary to produce a Renaming for the reverse mapping

fn from(data_dict: DataDictionary) -> Self

Converts to this type from the input type.

impl<T> From<T> for DataDictionarywhere
    T: Iterator<Item = (String, String)>,

Builds up a DataDictionary by reading an iterator over string tuples representing user-item interactions. We assume that the first string in the tuple identifies a user and the second string identifies an item

fn from(iter: T) -> Self

Converts to this type from the input type.