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.
This is a good kata to practice recursion. Not everyone is a recursion ninja
Because digits isn't a string for some input value.
why digits.split('') is not a function ?
this is a 10 kyu level
This problem should be translated to english first, cuz it's dead language