Struct HyperLogLog 

pub struct HyperLogLog { /* private fields */ }

HyperLogLog cardinality estimator.

Implementations

impl HyperLogLog

pub fn new() -> Self

pub fn insert<T: Hash>(&mut self, value: &T)

Hash a value and update the HLL registers.

pub fn insert_hash(&mut self, hash: u64)

Insert a pre-computed hash value directly.

pub fn merge(&mut self, other: &HyperLogLog)

Merge another HLL into this one (union operation).

pub fn count(&self) -> u64

Estimate the cardinality (number of distinct values seen).

pub fn non_zero_registers(&self) -> usize

Number of non-zero registers.

pub fn clear(&mut self)

Reset all registers to zero.

Trait Implementations

impl Clone for HyperLogLog

fn clone(&self) -> HyperLogLog

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HyperLogLog

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

Formats the value using the given formatter.

impl Default for HyperLogLog

fn default() -> Self

Returns the “default value” for a type.