You should write a function with which you can print the board at any moment with all the information that you need. And don't try to solve this kata in the browser, I think the complexity demands an IDE / Editor with debugging capabilities

Haven't done this kata, but I assume the open method either returns or prints something. That's up to you.
And about the whole mine field, it's passed as an argument map, but the updated one you should have it saved yourself to a variable.
Hope I'm able to help.

Yeah, same. This is such a fun site to practice RegExp on... I had run out of RegEx challenges on most other sites! xD

:-D

Approved, although I just realized that test cases and example tests are mixed up.

I think this one's quite clear actually

Cheers!

Glad to see the test cases have been updated; it's a more robust kata now.

And @ASDF, any failure to match should return -1, that's correct.

Thanks guys! I've added some more knotty tests to push your code harder. Please let me know if there are still holes in the tests though...

Yes. From what i can see, a lot of solutions should fail. E.g. i read the description as "asdf".indexOf(".") should be -1? My solution also is improper and should fail (ignores the second variable for the string case of lastIndexOf) but passes all tests.

Thank you, good idea, I'll try to write one of these days.