Set: A Simple Way to Indicate if Something Is Part of a Set

set is this collection that's been added to JavaScript a while back, which basically is just a way for you to indicate if something is part of the set or not. So putting in Dan or Steve would basically you could check that they are in it and it would return true. But if you check with about Amy, unfortunately you will find false because Amy is no longer participating in the podcast. And like I said, it can be strings,. It can be objects, and it's really easy and simple to use  and it's supported by all browsers.