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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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Haha surely best practice man :-)
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0.01d here means to divide the original result by 100, and then keep the final result to two decimal places.
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It is not the best way to use A==B to compare strings. Although most of the time A==B can successfully check whether two strings are equivalent, sometimes something weird may happen when using A==B. The method A.equals(B) is a better choice.