Thank you very much for your addition, I think it will be useful.

Yes, they have a certain similarity, I'm very sorry. I will remove this kata. Thanks you very much.

Thanks for your feedback. I think than prototype properties and Symbol as key is too much for 8 kyu. And here a number of simplifications were adopted for its solution.

I will add it to the description

• We don't have to check prototype properties;

fixed

fixed

fixed

fixed

I added it to description.

• Argument's strings (and object's keys) will always have one class in the string like 'button' and will not have more as 'button action'.

I think additional code is needed to properly handle this case. I'll probably delete this case in the test.
Thanks.

I changed description

• There should be no extra spaces ('' and ' ' should be deleted; ' button ' should change to 'button')

I'm sorry, it was the idea of the first kata, when values were stored in an array instead of arguments. I will change the description.

thanks a lot

Thank you very much, I will correct the tests.

1. I have test for spaces in the strings/keys, but maybe i should add it to example test too;
2. Yeah, I deleted it.

Thanks :)

In the order of the arguments, if there is already one value in the list, it must remain there.
I'll add it to the description, thanks

Thank you very much for your comment.