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.
As far as I know, there is no such method in Long class.
You could do String.valueOf(n).length() instead, but it's slower.
why you use custome method instead of using Long.length property from Java?