I guess 8kyu for the long way, but right way is definitely at least 7kyu

Merged.

C: in the random tests, the user function is tested against itself

fork fixing it, also clearing a warning and moving the testing code out of preloaded

After a quick scan, I only found C, C++, coffeescript and JS to have some kind of restrictions. The way I see it, either those translations should be softened, or every other translation should be updated, but then shouldn't it be 6 kyu? Nasty situation overall :/

But why are JS tests so restrictive? Many other translations don't require any optimizations, and that makes sense for 7kyu.

Are we trying to learn to code or doing a math class?

You can choose literally every other kata to solve, you do not need to solve math kata if you do not like them :)

my answer was NOTHING like the common answer

The kata is labelled with Regex, and you chose to avoid it :P

in what world are people entering PINs like -1.234?

That's literally the point of this exercise: to validate the inputs. In the context of ATMs maybe it's not so accurate (probably impossible), but from 3rd example in description it should be clear that theoretically any data could be in input.

I do not believe this is 7kyu

It seems fine for 7kyu, especially if you use regex.

I do not believe this is 7kyu and my answer was NOTHING like the common answer. Also, this example is very strange because in what world are people entering PINs like -1.234?

Are we trying to learn to code or doing a math class? why test giant numbers that require optimizaton of code on a 7 kyu?

absolutely no reason for this to be 8 kyu or have that high of a satisfaction rating. this isn't math class what are we doing?

As a beginner, this solution is faster for me to write while staying extremely readable/understandable.