I added [spoiler][/spoiler] tags to your post, since that seemed to be what you want.
Cool, that is the exact solution I came up with.
… using the least amount of code
That can be a fun exercise but just be warned that sometimes the best code is not the shortest. Readability and maintainability are often more important than saving a few lines of code. I think “simple” is a good goal, as long as “easy to read” is factored in. Well written code reads like a story and explains itself.
I want the output to be [‘J’, ‘A’, ‘N’, ‘F’, ‘E’, ‘B’, ‘M’, ‘A’, ‘R’ and so on]
I was able to do with with a reduce method and a few spread operators. I’m not seeing anything simpler.
Sure, I guess that would be “simpler” for learners uncomfortable with reduce. It’s doing the same thing, just that reduce does it in a single line and I think it’s a “better” solution. I think a properly applied method is always better than a loop - assuming it doesn’t get too arcane. But I would definitely agree that the loop method is a better place to start if that solution is not clear.