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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.
Is the java version of this relevant?? I was thinking about contributing...There are very few questions for java on codewars
You should also have a test case for array size zero in kata test cases
When you are doing population=newPopulation,Shouldn't you also update fitnesses as fitnesses=newFitnesses by generating fitnesses again??