This's great. but this doesn't ruturn a false value.

Why am I so stupiddddd

forgot that there was a Java version, and it did not test it either... I added a test that uses reflection to find all non-private fields of the class that have a (possibly boxed) arithmetic type (int, Integer, double, etc.) and seem to influence the output of check(). there are many ways to bypass this, but I reckon for 7 kyu it's enough.

looks good, approved

That already fails if the keys are defined in the wrong order. Let's not do it like this. ( I am working on something better though. )

This JS fork tries to enforce exactly two methods "check" and "increment", and an inaccessible counter.

Please review.

This is a clever solution

wow this is much simpler

well that make sence.............

Why am I so stupiddddd

не ну круто!

Oh I definitely should have thought of this! Very clever.

I like it!

great!

best