So I was super-stumped on this one, and checked the given solutions, but I was very confused about the curly braces used in the example solutions. Maybe I missed something, but when did we go over using the curly braces to limit the amount of characters that are tested in a code? That’s a very important lesson that I wish we had a chance to learn about!
Challenge: Regular Expressions - Restrict Possible Usernames
Link to the challenge: