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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.
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Wut? It does return an array of int.
replace is always more efficient if u dont need regex
best one
this is what I did, but I used Math.pow because I'm used to it
I like this one the best