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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.
Fix merged.
It's helpful to note what language you're working in when raising issues.
Confirming this is an issue in TypeScript, however. The random test generator is sorting inputs lexicographically rather than numerically. Will post a fix.
Should pass random tests
ipsBetween("74.107.44.16", "9.244.235.108"): expected 1081491620 to equal -1081491620
I suppose number of IPs should be positive though?