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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.
but it's handy for assignment
the return statement isn't required.
I've thought the same plenty of times on this site. What you implemented was the canonical swap solution. There are plenty of other ways to swap variables. E.g. XOR swap for integers.
Argh, I should have thought of that!
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This comment is hidden because it contains spoiler information about the solution