Also, for lists it returns True if not and empty list

Seeing that you don't get any reply in 7 months, probably means it's not the right place. You might have better chances if you ask in Codewars's Discord Server instead.

er...I cant believe this worked!

Such a clever solution!

This means exactly: "When multiple hashtag occurrences are found, delete only the first." ;)

iirc if you link your github it takes the picture from that account.

You're doing recursion wrong.

Does not work how?

Did you read the FAQ? https://docs.codewars.com/training/troubleshooting/

oh thanks for that hint had no idea how to do this one

Is there a book/website that teaches using streams like this? Trying to self- learn before going to College.

Is there a good book/website to learn streams? The book I'm using does not cover streams in depth

java 8 in action.

Is there a book / website that taches streams? Something that teaches to self-learners?