union_all

The union of every set in sets.

HashSet::union only combines two sets and returns a lazy iterator; this takes any number of sets and returns an owned set. An empty slice gives an empty set.

Import

use helpers4::set::union_all;

Cargo feature set (enabled by default). To compile only this module:

cargo add helpers4 --no-default-features --features set

or in Cargo.toml:

[dependencies]
helpers4 = { version = "0.0.6", default-features = false, features = ["set"] }

Signature

pub fn union_all<T: Clone + Eq + Hash, S: BuildHasher>(sets: &[HashSet<T, S>]) -> HashSet<T>

Parameters

Parameter	Type	Description
sets	&[HashSet<T, S>]	The sets to merge.

Returns

HashSet<T> — A new set with every element that appears in at least one of sets.

Examples

use helpers4::set::union_all;
use std::collections::HashSet;

let a = HashSet::from([1, 2]);
let b = HashSet::from([2, 3]);
let c = HashSet::from([4]);
assert_eq!(union_all(&[a, b, c]), HashSet::from([1, 2, 3, 4]));

Source

src/set/union_all.rs