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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.
Love this, I had the same idea when I saw the problem.
Didn't think about the fact ParseUint will likely save me from needing the trim, oh well. Happy to see the top solution is basically the same.
It reduces your loops by 1.
vis already the first element of the array (1 * arr[0] == arr[0]), so you can simply skip the first element on the loop. IMHO this is the best solution.