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.
When I run the code, the custom unique-method does not group properly. The length of the result is always the same as the lenth of the source-list.
I assume the problem is the bytearray here. If i run this code with an numeric id, it works correctly.