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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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I missed the i modifier, learning new things, YAY!
damn this is acutally clever
It's best practice to minimize time complexity in case you're dealing with large amounts of data someday.
Interesting way of thinking about it, but your solution makes sense. Clever!
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g modifier: global. All matches (don't return on first match)
i modifier: insensitive. Case insensitive match (ignores case of x or o)