Loading collection data...
Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
This shows no indication of a problem with the kata.
I'm coing in JS and I pass everythink except one Invalid array that is STDERR.
I don't understand why cause I'm return null for everything that is not a number or that is not an array.
Can someone help pls