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.
This comment is hidden because it contains spoiler information about the solution
That's a good point, but code tracing is something that every wannabe developer should be aware of. If you will need the original arg in any other place in your code, you can't mutate it and if not, that's not a thing. This is something that should be learned at a very early stage of coding.
As codes are abstractions, you ALWAYS should be AWARE of the CONTEXT where it is inserted.