union - nodef/extra-set GitHub Wiki
Obtain values present in any set.
Alternatives: union, union$. Similar: union, intersection, difference, symmetricDifference, isDisjoint.
function union(x, y)
// x: a set
// y: another set
const set = require('extra-set');
var x = new Set([1, 2, 3]);
var y = new Set([2, 3, 4]);
set.union(x, y);
// → Set(4) { 1, 2, 3, 4 }