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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.
It will give you ['even', 'odd'][0] which means 'even' (the value of the first index of the array ) or ['even', 'odd'][1] which means 'odd' (the second value of the second index of the array).
Similar to myArray = ['a', 'b', 'c'], where myArray[0] = 'a', myArray[1] = 'b', myArray[2] = 'c'.