Has anybody tested the performance of this ? it feels to me like recursivity would be less efficient than a regular loop here

very clever and easy to understand answer

We all learn, part of the process. This platform will defo make you a more well rounded dev

What a fantastic one liner LOL

Since we were using numbers as the input this makes so much sense to do instead of writing our that long switch statement that I used for this.

Genius

he just sort them from 0 to 9 and uses the input as index when you type 1 as input you will get the value at index one from the array

can someone explain how this works? they dont provide actuall numbers.... im confused. is [n] somehow represent the numbers?

this is so much better than typing each case out

Dang...I wish I could take back my solution now. I even put break statements on my switch cases...and then realized they aren't needed.

haha I knew there had to be a faster way while writing out the switch statement and you found it!

If you don't declare variables they are automatically global in JavaScript which is bad as it can pollute other code places or even overwrite other variables. It is done here because this code is trimmed to have as few characters as possible (don't know why they use spaces though) and it can be expected that there are no side effects.
let and const only define the function in the current scope.
Since function definitions normally don't change it is best to define them with const.

What is the fundamental difference for real code, if in this decision at the very beginning you also write "let". And what is the right way?