Enum imdb_index::NameScorer

pub enum NameScorer {
    OkapiBM25,
    TFIDF,
    Jaccard,
    QueryRatio,
}

The type of scorer that the name index should use.

The default is OkapiBM25. If you aren't sure which scorer to use, then stick with the default.

Variants

OkapiBM25

OkapiBM25 is a TF-IDF-like ranking function, which takes name length into account.

TFIDF

TFIDF is the traditional TF-IDF ranking function, which does not incorporate document length.

Jaccard

Jaccard is a ranking function determined by computing the similarity of ngrams between the query and a name in the index. The similarity is computed by dividing the number of ngrams in common by the total number of distinct ngrams in both the query and the name combined.

QueryRatio

QueryRatio is a ranking function that represents the ratio of query terms that matched a name. It is computed by dividing the number of ngrams in common by the total number of ngrams in the query only.

Methods

impl NameScorer

pub fn possible_names() -> &'static [&'static str]

Returns a list of strings representing the possible scorer values.

pub fn as_str(&self) -> &'static str

Return a string representation of this scorer.

The string returned can be parsed back into a NameScorer.

Trait Implementations

impl Clone for NameScorer

fn clone(&self) -> NameScorer

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for NameScorer

impl Debug for NameScorer

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Eq for NameScorer

impl Hash for NameScorer

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where     H: Hasher,

Feeds a slice of this type into the given [Hasher].

impl PartialEq for NameScorer

fn eq(&self, other: &NameScorer) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Default for NameScorer

fn default() -> NameScorer

Returns the "default value" for a type.

impl Display for NameScorer

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl FromStr for NameScorer

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<NameScorer>

Parses a string s to return a value of this type.