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.
"Hint: Do not modify the original array."
What? Array is an object and copying it to the new array just copy the link, so sorting a new array is modify original array. So what was meant in that hint?