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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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8kyu katas are indeed very basic ones so it is logical not needing to handle any invalid input, therefore the output format. Otherwise the description should state explicitly how to handle invalid inputs. You may be right that using
Result<T,E>is idiomatic, though in such cases many katas expect anOption.This comment is hidden because it contains spoiler information about the solution
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Mine was a lot like this, but I only defined isEven. I really should have commited xD
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