Loading collection data...
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.
But what will happen if null is passed? So, still good to check.
Nice catch ;)
As you are using TypeScript, you don't really need to verify if the
numsexists. It will always be an array: empty or full. TypeScript guarantee this for us.