this is a array challenge isn't it! nice

That means your code isn't always returning an array. Not a kata issue.

* With input 'a'
* Your function should return: ['a']

"TypeError: actual.sort is not a function
at doTest (test.js:23:19)
at Context. (test.js:28:3)"

i'm not entirely certain as to what this error means - it appears to reference some code in the test cases, however i do not seem to be able to do anything about it and my submission will not pass through at all

I agree that is simple and easy to understand, but very performance heavy.

nomg no estop=

Yeah, I'm still learning. I will improve the more I practice 😃

I was assuming that this kata's tests were designed to make this kind of solution impossible for performance reasons but I can't argue that it's simple and easy to understand.