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.
You can actually just pass the string 'ucfirst' to array_map and it will work all the same, and it would also make it the same as my solution ;)
Are you not supposed to use the push() method within the build_one_two_three()?