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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.
Lol nice touch on the return.
Regular expressions are described by regular languages. When a regular language parses a string it keeps going without stopping (unless the compiler or implementation optimizes it out.) It's O(n).
It's clever but you could save a hair of time setting min and max to arr[0].
This is a pretty good solution provided that (n > 0 ? i : -i) is optimized away by the compiler and not calculated n times.
I wrote the exact same thing.
That's an interesting use of streams.