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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.
simple and clear, clearly understandable thanks!
I think in order to solve this Kata with only fundamental knowledge is possible but so time consuming it deserves to be a in more advanced kyo.
The key is that all the test cases are all iterable objects and you need to iterate over them in order to remove the repeated caracters being them strings or arrays (including arrays of numbers, buy they are iterable anyways) NOT numbers, dont worry.