iterator.example.use.js

let ob = { age: 41, name: 'Leonard', profession: 'JavaScript Developer' };
let obit = iteratorFactory(ob);
obit.next(); // returns { value: { age: 41 }, done: false }
obit.next(); // returns { value: { name: 'Leonard'}, done: false }
obit.next(); // returns { value: { profession: 'JavaScript Developer'}, done: false }
obit.next(); // returns { value: undefined, done: true }