Trait HyperLogLogIterator

pub trait HyperLogLogIterator<P: Precision + WordType<BITS>, const BITS: usize> {
    // Required method
    fn union(self) -> HyperLogLog<P, BITS>;
}

Required Methods

fn union(self) -> HyperLogLog<P, BITS>

Returns a HyperLogLog that is the union of all HyperLogLogs in the iterator.

Example

use hyperloglog_rs::prelude::*;

let mut hll1 = HyperLogLog::<Precision12, 6>::default();
hll1.insert(&1);
hll1.insert(&2);

let mut hll2 = HyperLogLog::<Precision12, 6>::default();
hll2.insert(&3);
hll2.insert(&4);

let mut hll3 = HyperLogLog::<Precision12, 6>::default();
hll3.insert(&5);
hll3.insert(&6);

let hll_union = vec![hll1, hll2, hll3].iter().union();

assert!(hll_union.estimate_cardinality() - 6.0 < 1.0, "Expected 6.0, got {}", hll_union.estimate_cardinality());

Implementors

impl<P: Precision + WordType<BITS>, const BITS: usize, I, C> HyperLogLogIterator<P, BITS> for I

where I: Iterator<Item = C>, HyperLogLog<P, BITS>: BitOr<C, Output = HyperLogLog<P, BITS>>,