TL;DR Adding Swift Code to Objective-C Project Ensure your Swift class derives direct or indirect from NSObject Ensure your Swift class is public to ensure the YourProjectName-Swift.h header generation Prefix the class to expose it to Objective-C. Any Property or method needs its own @objc annotation to be visible from Objective-C. Use the @objcMembers annotation to expose all properties and methods of the Swift class Reminder for myself I learned a couple of essential things about mixing Objective-C and Swift in one project.

Ho Ho Ho Now that we approach the last month of this extraordinary year, I’m looking forward to some coding challenges to distract myself and learn something new. And here it comes AdventOfCode. Sign in with any of the social accounts mentioned on their page and start solving the daily puzzles. The programming language doesn’t matter. You can produce the solution with whatever language/tool you like. And don’t forget to check AdventOfCode Subreddit for hints, help, and the solutions others have produced.

I like to learn new tools, programming languages, and exciting topics. I recently found the book Genetic Algorithms in Java Basics , and I found the code samples easy enough to understand to “translate” them to a different programming language for the sole purpose of getting some hands-on experience with a new programming language. I’m done with the 2nd chapter of the book and implemented the genetic algorithm described in that chapter to crystal lang.