( JS )

No items method is required ( now. it may have been back then ).

...and you need to round down the age like in the first example.

What's the difference?

Added sample tests and updated description.

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If the author says round "down", than he must understand what is rounding down and what isn't.

For beginner kata's, when you make such comments it would be helpful to either explain or provide a reference, without that it isn't going to help the author as they don't even realize what the issue is exactly.

That seems to be the part to make you not just use the defaults.

"Regular Expressions" tag removed

Done. That should hopefully make things clearer.

Wich changed to which

I hit this too. I generally find "import foo" a better practice since it makes it clearer to your readers when you're using something from another module.