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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.
Use spoiler flag next time please.
This comment is hidden because it contains spoiler information about the solution
No problem, I raised an issue about the error message being confusing above, because, it is in that case.
There is no such test, I'm guessing you're mutating the input value. Use
console.log(board)as the first line in your code to see the input as it was before your code mutated it.All javascript tests are ok. And if they weren't, you have to provide proof, like the input value, the expected value, the value you're returning and think it is the correct one.
What is the best practice for Unicode strings then?