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.
f.trim(); would also work in this case - I find it easier to read than substring, though substring is more efficient probably.
Sure. See my other solutions.