Struct SimHash 

pub struct SimHash(pub u64);

SimHash fingerprint for text or feature vectors.

Computed by weighted XOR accumulation with threshold by bit position.

Tuple Fields

0: u64

Implementations

impl SimHash

pub fn compute(features: &[u64]) -> Self

Compute a SimHash from a slice of feature values.

Each feature votes for/against each of the 64 bit positions. If the weighted vote for a position is positive, that bit is 1.

pub fn hamming_distance(self, other: &Self) -> u32

Compute Hamming distance to another SimHash.

pub fn bits(self) -> u64

Return the raw 64-bit value.

pub fn similarity(self, other: &Self) -> f32

Similarity in [0.0, 1.0].

Trait Implementations

impl Clone for SimHash

fn clone(&self) -> SimHash

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SimHash

impl Debug for SimHash

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

Formats the value using the given formatter.

impl Eq for SimHash

impl Hash for SimHash

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SimHash

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for SimHash