Hello,
It looks like the node version that is run behind the scenes may be 12 (or older). Is there a way to update it to higher version? This will allow us to use newer operators like ?. (optional chaining) which makes code much simpler.
thanks,
Rakshith
Course: Grokking the Coding Interview: Patterns for Coding Questions - Learn Interactively
Lesson: LinkedList Cycle (easy) - Grokking the Coding Interview: Patterns for Coding Questions