union$

Obtain values present in any set.

Alternatives: union, union$.
Similar: union, intersection, difference, symmetricDifference, isDisjoint.

function union$(x, y)
// x: a set (updated)
// 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) { "a" => 1, "b" => 2, "c" => 3, "d" => 40 }

x;
// → set(4) { "a" => 1, "b" => 2, "c" => 3, "d" => 40 }

References

• Data.Set.union: Haskell
• Set.union: Python
• _.union: lodash
• _.unionBy: lodash
• _.unionWith: lodash
• Array.union: sugarjs
• @thi.ng/associative: @thi-ng
• zet: @terkelg
• set-utils: @torbs
• set-tools: @ryanmcdermott
• Python Sets: w3schools
• Data.Set: Haskell
• Set: MDN web docs