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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.
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it is stated that text and numbers alternate, which it does not do in your output
it is however a problem that the tests don't consistently catch that
It's your solution. Your solution fails on inputs where encoded text could also be a binary number, and you can see it in the output of the test that you included.
Expected: 'wrqjvi, 0, dubb, 13, j...Your solution produced:instead got: 'wrqjvi, 0, dubb, 13, 6..., notice that you have two numbers in a row? Becausejis110, which can also be interpreted as a binary number. Your solution will fail on similar tests, you can add this to the sample tests:Test.assertEquals(decode('1011011011019800110110'), "aaa, 54");to see it failing in real time.You just got lucky when you resubmitted your solution and the tests didn't generate a case like this one. The random tests might need to be hardened to make sure to include a "tricky" case like this, but as it is, there is nothing going "wrong" with the tests.