iterables.js

const makeInterable = (array) => {
  let nextIndex = 0;
  
  return {
    next: () => {
      if (nextIndex < array.length) {
        return {value: array[nextIndex ++], done: false}
      } else {
        return {done: true};
     }

    }
  }
}

const it = makeInterable(['Dayana', 'Joel', 'Lola']);
console.log(it.next().value)
console.log(it.next().value)
console.log(it.next().done)
console.log(it.next().done)