Function stringmetrics::jaccard_set

pub fn jaccard_set<T, S: BuildHasher>(
    a: &HashSet<T, S>,
    b: &HashSet<T, S>
) -> f32where
    T: Eq + Hash,

Calculate the Jaccard index on two HashSets.

Returns the mathematical Jaccard index, i.e. |A ∩ B| / |A ∪ B|

Usually this is interfaced via jaccard; that is recommended unless your data is already in a HashSet.

Example

use std::collections::HashSet;
use stringmetrics::jaccard_set;

let crew1 = HashSet::from(["Einar", "Olaf", "Harald"]);
let crew2 = HashSet::from(["Olaf", "Harald", "Birger"]);

assert_eq!(jaccard_set(&crew1, &crew2), 0.5);