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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.
I think it is not safe to directly compare two float64 variables produced by math.Sqrt(float64(x)) and math.Floor(sqrt). You could get more details at this discussion on stack overflow regarding comparison two float numbers https://stackoverflow.com/questions/47969385/go-float-comparison