You can throw multiple eggs if you want, but only from one floor. Since they are identical, I can't think of a reason to do so unless in (2,14) you just want to throw two eggs from floor 105 at the end so you don't have to carry the last one down.

• 7x7, I don't think so. But that really depends on the approach you choose at the begginning (Maybe I'm not at the better place to make a judgment about that: I used the same approach for the 3 versions, beginning with the 6x6, so Id didn't see much of a difference...)
• mine sweeper: according to some power users, yes.

So cool, thinking that I'm not the only one! ;D (so you just did your first 1 dan. Too bad there is the other way... ;) )

(EDIT: wow, doing it this way in java...! x-D Respect! :) )

Fixed

It's not, because you can't drop more than one eggs per try ;-)

The translator came back from a three week holiday .... ;-)))

You can reset the example testcases by first backing up your code then use the reset button.

If you mean the example testcases, it's already corrected. Your will see the correct case when you train this kata again.

I'm sorry for this issue :(
Haskell version is a translation, but the translator haven't visit CW these days, and I don't know Haskell. So, only two ways: waiting for the translator come back, or some power user can help me fix it?

I'm sorry for this issue :(
Haskell version is a translation, but the translator haven't visit CW these days, and I don't know Haskell. So, only two ways: waiting for the translator come back, or some power user can help me fix it?

This has been fixed.

Probably a new function in that module since the kata was released.

Thank you again, senpai!

Well, that's just great. The Foldable-Traversable proposal patch seems to have hit CW. For those unaware, the type of concat and concatMap has changed from

concat    :: [[a]] -> [a]
concatMap :: (a -> [b]) -> [a] -> [b]

to

concat    :: Foldable t => t [a] -> [a]
concatMap :: Foldable t => (a -> [b]) -> t a -> [b]

And now the code needs to specify which t is used. Adding type signatures at the right place will suffice. The kata is now fixed.

I think is some kind of issue in Haskell which arose recently: can you work well on other katas and are you sure it has nothing to do with your solution, right?