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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.
It works like built-in
split(). Hint: message you're writing about isExpected an error when empty delimiter!, that means that there is delimeter, but just empty..na, you have to throw an error/exception if you don't get a delimiter.
Tho, that is when the delimiter is actually empty. when it's "somehting else", you have to do... something else... :/