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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.
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Angular uses it to extract function arguments for dependency injection.
No because you're dealing with strings...
If it were as simple as that, it wouldn't be a 4kyu kata.
Well the tests want you to return the full number and if you process the number as a string.
the idea is to calculate the factorials and store the result as a string.