DEV Community

Discussion on: Custom Object Iterators in JavaScript

kepta profile image
Kushan Joshi • Edited

Great article Steve, especially that you found a real world use case of making a custom iterable object. I had similar fun while writing How I learned to Stop Looping and Love the Iterator, though I wish I could add a section on generators.

One suggestion for you to improve the iterator of your se7enDwarves, is that you can redirect iteration to another iterable using yield *:

se7enDwarves[Symbol.iterator] = function* () {
  yield * se7enDwarves.members.values();


(7) ["Sleepy", "Grumpy", "Happy", "Bashful", "Sneezy", "Doc", "Dopey"]
stevebrownlee profile image
Steve Brownlee Author

Thanks, Kushan. I did realize that the iterator could be simplified about a month after I wrote the original article, but never updated it, so thanks for posting what that looks like. Great stuff.