@extra-array/union-update/example.js

Gives values present in any array.

const array = require("extra-array");

var x = [1, 2, 3, 4];
var y = [2, 3, 5];
array.union$(x, y);

x;

var x = [1, 2, 3, 4];
var y = [-2, -3, -5];
array.union$(x, y, (a, b) => Math.abs(a) - Math.abs(b));

var x = [1, 2, 3, 4];
array.union$(x, y, null, v => Math.abs(v));