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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.
Note that your solution is wrong. The tests are bad.
Test.assertEquals(XO('xxxoo'),false);You're confusing the logs, they appear above the test result.Just typecast it to an integer and it should take care of it for you, depending on which language you're using