There is a bug in this one, it fails for "[02-20]".

I think some people have cheated on this kata without realising. I think more test cases are needed for remove, e.g. remove node from high up on a deeper tree (more than a couple levels below it).

fantastic

I love this, it's a great approach to solving this problem. Compile to Javascript and run it through eval(). Neat! Potentially quite efficient too if the Javascript interpreter gets to compile it, not that these type of languages are ever meant to run fast.

I'd say this kata is already way too easy for 3 kyu, and there's no simpler version of this problem that would be interesting.

The tester for this problem appears to let through invalid solutions. Add a test case such as (-3).twos(5) === '11101'.

This doesn't work!!! Try e.g. (-3).twos(5) you get 11111

This also helps check if people have used decodeURI and encodeURI correctly. N.B. the path after the hostname, the parameter name and the parameter value can all have URI encoded characters in them! I reckon nearly all the current solutions won't work at all.

"Your Next Challenge..." is giving me challenges that I've already completed. Also, I can go to the next one but it just cycles through a very short list of these ones I've done already (even the one I literally just did).

This kata is just plain awful...

This can't possibly work!!

This kata should be deleted it's a duplicate of the one that asks you to give all numbers which are even...