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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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This solution is built off basic Javascript and clearly shows each actionable step.
+1 don't mutate original array
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Agreed. This solution is not as performant as it ought to be. It's using O(n) lookups just to check visited nodes, for example.
How can this be a best practive, or clever, if it walks the entire graph even after it has found a solution?