if you solve the kata MongoDB object ID, you can know exactly how old this (and any other) solution is ;-)

If you see the oldest comment, it's from 8 years ago. The solution can be older than that.

This solution likely comes from a time when let didn't exist in JS

Great, but why do you keep using var?

Gauss is turning in his grave BUT it works.

Great

You are right😂

This is insightful

This one is at least 7 years old.

You're correct, it's best to use let in nearly all cases, unless you know what you're doing. I suspect that many of these solutions are old, posted either before let was introduced, or prior to its widespread usage.

Good job, I think i should be a let and result should be a var? for scoping reasons.
https://stackoverflow.com/questions/762011/what-is-the-difference-between-let-and-var

This solution is probably older than you

wow very simple and clever, great work !!

Well yea, no need to say thank you.

can someone please explain how we can refactor this solution to reflect O(1) concept?