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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.
Nice. This was most similar to my solution. Don't completely understand the syntax of the #1 solution for this problem. But in the meanwhile, this is great. Thanks!
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Nice solution. Gives me new idea to solve a problem.
Thanks all.
you probably forget arr.length - 1 instead of arr.length