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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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tel7as
I wouldn't exactly call this 'Best Practice' but maybe 'Clever' as it's short and concise.
Imagine the case where you have the iterator given in the example (trueIfEven) and a list of 1 million even numbers.
Could you please explain this solution?