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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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Do you have any test case to prove it is a problem?
I know the difference: your solution will make both branches execute if func1() returns something not truth-ish!
I think you might run into a problem if two of the numbers are the same.
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Yes, I would very much like to know the difference as well... Have you tried stackoverflow @vlakas