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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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Is a solution better than O(n^2) even possible?
how does one calculate the sol has O(n^2) ?
Oh yahhh takes 2ms longer than my solution lol
Oddly enough I had to add a .find polyfill, even though it is supposed to run through babel/support es6
Good point, I like your solution!