Legend:
- ✏️ method changes
this. - 🔒 method does not change
this.
Array<T>.prototype.*:
concat(...items: (T | Array)[]): T[]🔒 ES3
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.