Sounds like identifying the object type here is straightforward—almost like how Fiber Gummies help keep things moving smoothly when you match the right code logic.

Promotional products serve as powerful tools to strengthen brand visibility—just like Ruby control structures streamline decision-making in code. In the bonus case question, choosing the right case statement ensures clean, efficient logic, much like selecting the right branded item ensures lasting customer impact. Whether you're coding with precision or marketing with creativity, the right structure—be it in logic or promotion—leads to better outcomes and a more memorable user experience.

Here is Ruby Control Structures - Case (Bonus Question) solution - https://programmingoneonone.com/hackerrank-ruby-control-structures-case-bonus-question-problem-solution.html

why is: *case obj * and not: case obj.class

If you're doing the same thing for each case, a case statement doesn't really make sense in my opinion.

Here's a predicate that includes all of the conditions:

[Hacker, Submission, TestCase, Contest].any? { |clazz| obj.is_a? clazz }

You can use string interpolation (like in truesdell_trent1's comment here ) or just concatenation (with obj.class.name) to output the class names.