@extra-array/difference/example.js

Gives values of array not present in another.

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

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

var y = [-2, -4];
array.difference(x, y);

array.difference(x, y, (a, b) => Math.abs(a) - Math.abs(b));

array.difference(x, y, null, v => Math.abs(v));