Why recursive lambda?
It is generaly not a good practice to try to make the code as short as possible but to make it as readable as possible...
For example if you look at my solution, it is basicaly the same as yours but a lot more readable.
(Just a tip :))

How can anyone vote for a best practice here blows my mind. Disgusting code tbh

• you should be doing return statements like yours (type: return ... else True) it makes no sense. If you think of this solution, just make the condition return True if the else happens

Not a good practice to go for a one-liner like this. It makes it really unreadable. Try not going for one-liners but for a readable code.

Hi, your solution is unreadable. It is a lot easier to think about an algorithm then using some regex. (It is probably only an opinion and some people could argue)

Hi, that isList method of yours is not a good practice. Having this function, that only does exactly one function which is inside is not very good. You can just use it explicitely there

In a perfect world, all kata would be, and would always have been, written according to all best practices.

This is not a perfect world.

( JavaScript doesn't even have tuples, yet people program in it. )

It should be changed. It is even more sad, that 38000 people are getting the wrong practice.

Do you think the kata will be changed when more than 38000 people passed it?

Hello,
I believe it is a terrible practice to return an array, which consists of multiple types.
For example in python, the arguments should be typed - I believe it would be much better if the function returned a Tuple[int, int, bool]