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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.
Solution is good, I would suggest using more descriptive names (obviously codewars isn't exactly nudging us in the right direction with parameter names like "s").
For example: "s1" and "s2" tell us nothing about the variables - something like "capitalizedAtEven" and "capitalizedAtOdd" would be clearer (although still not perfect).
Nice solution. One small tip, you can use [string, string] as the return type for capitalize if you want to be more specific. This will only accept an output array of two strings.
Cheers!
Nice solution!
Too much unnecessary operations.