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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.
Needs random tests
Seems already fixed
Out of spec.
What should happen on invalid input?
It looks like you're missing a closing parenthesis in C#, but otherwise it works.
I'll edit, solved a few and didn't notice.
By the way, is there a way for you to enforce it?
The point of the Kata was to use the Null-Conditional operator.
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