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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.
You're right, missed that
sliceand just assumed it was a straight iteration over the original... even slower!This comment is hidden because it contains spoiler information about the solution
This is still O(n^2) - the worst case is when there are no negative numbers.
You don't have to return early in the empty array case ;) but other than that, this is the most concise and readable linear-time solution.