You are right. I noticed this too.

I added (error:any) to the catch of the test to make it pass

Genius

Great kata, I had to rewrite my solution twice in order to optimize for the performance case, for sure it helped me to learn a lot!

Okay, that was an easy one, but at the first attempt random tests failed, while for the second without any changes it did pass 🤷

Took 2 weeks to solve, but I had a lot of fun, and learned a lot on the way!!

Something is wrong with the Duplication exception tests

TSError: ⨯ Unable to compile TypeScript:
test.ts:608:16 - error TS18046: 'e' is of type 'unknown'.

608         expect(e.message).to.equal('Duplicate ' + duplicate);

I did comment it out from my sample tests, and it allowed my solution to pass all tests.

I also, tried other users solutions, and they do not pass this test case as well.

Guys, I updated the description and added an example of how steps are counted, it should make the kata a bit better

People can index into strings just as well as they can index into arrays.

that's not true in JavaScript where strings are arrays of UTF-16 code-units. "🐸"[0] !== "🐸". I know that you know how to get around this, but many beginners do not, so i fell like it's not completely unwarranted to pass an array of codepoints

But spitting the inner string into an array of characters ( encoded as strings, because JS doesn't have characters ), doesn't add anything.

People can index into strings just as well as they can index into arrays.

All you're doing is adding visual clutter.

.

Done

it's still not sufficient. My original solution still passes. There needs to be a lot more random tests, something like 100-200

Increased the difficulty

testing really needs to be beefed up. Look at my solution

?

Yeah, but it is a matrix exercise