superset

A library for ES6 that extends the built-in Set class to implement the missing fundamental methods such as map(), filter() and reduce() in addition to basic set methods such as union() and isSubsetOf().

Install from NPM

npm install superset --save

Use

"use strict";

const SuperSet = require("superset");
const numbers = new SuperSet([1, 2, 3, 4, 5]);
const evenNumbers = numbers.filter(num => num % 2 === 0);  // SuperSet { 2, 4 }

evenNumbers.isSubsetOf(numbers);  // true

numbers.diff(evenNumbers);  // SuperSet { 1, 3, 5 }

Docs

You can check out the docs or refer to the Array methods on MDN for further information. The code is also documented using JSDoc.