Thank you for the kind words. Take a look at the answer by @mikgra also... it's very good. The anchors are necessary according to the problem description. Without the anchors, a length of "xyz123" would create a zero-length array rather than raising an error. If the kata's tests pass without the anchors, then I would think there must be missing tests.

I would agree. In the instructions, you state that a passing case is "WeIrD StRiNg CaSe" which counts spaces when capitalizing even indices. However, your test case seems to ignore spaces as counting as even indices.

/^\d+$/
Is it essential with these? ^ $
Seems working without those two.
Anyway awesome simple, readable code than mine

?= is a lookahead assertion. It checks for the match (with any uppercase letter in this case: [A-Z]) but doesn't include it in the match.

Can somebody explain this /(?=[A-Z])/?

try to make it DRY

I'm getting this as well... And no I'm not actually calculating factorials. Figure it out?

I translated this kata into Java, add it if you are interested :)

I think i made a good solution, but it keeps throwing this :(

Process was terminated. It took longer than 6000ms to complete

awesome solution

awesome solution

I think your comment has a little problem too ;). What's the problem in the kata? Also check whether the problem has already been covered by other users.

I think your test case has a little problem

Can you show or modify the test case after i submit the code?

suppose you have used assert method, this only shows

'Value is not what was expected'

I want to see the failed input! like this.

'Expected: "invalid11", instead got: "invalid"'