I liked your code Bro

you can also use the loose operator just in case someone mistakenly types the number as a string.

What I like about this solution is it fixed the inherent bug of Truthy vs Falsy and evaluates the actual input.

love this one

lol

poor performace, you need to sort whole array to get a result

Can you please explain that last line? It's not very intuitive as for me.

Edits complete, potential cheats disabled. Issue resolved.

Thanks for the suggestion, I will disable them right now :D

Don't forget to prevent .toLocaleUpperCase() and .toLocaleLowercase().

Your right! This could be misleading because the description is talking about unique IDs. Therefore I added a note to the description's text.

One of the cases creates a random array. In this random array are occurences of the same value. Your instructions make no mention of an array with multiple values.

I didn't know of a shorthand evaluaiton such as that.

Very well explained, thank you.