Thank you for your first review, cglee079! 🙏 I was nervous waiting for your review, but I'm so glad that my intentions were conveyed well! Kotlin not only allows you to handle Java code safely, but it also supports functional programming wonderfully, allowing you to create more powerful and secure code. Switching from Java to Kotlin is a big challenge in itself, but I'm really proud that you gained confidence by applying functional programming to it! 😄 I think you're having an experience where your code is becoming safer and cleaner by utilizing the advantages of functional programming. You'll become even more addicted to the charm of functional programming in the future! ✨ If you have any difficulties applying functional programming, please feel free to ask me any time. I will do my best to help you to the best of my knowledge. I will continue to visit you with good content that you can apply directly to your work. Have a happy Christmas and a happy New Year! 🎄