I don't think they were stating that a simple table based solution was used, if it were, it would probably meet the bar for "succinct" because you could just wr

I don't think they were stating that a simple table based solution was used, if it were, it would probably meet the bar for "succinct" because you could just write that as something like `if X in Y`. Rather, I got the impression that a lookup based approach was intended, but it was enterprise-ified (like https://github.com/Hello-World-EE/Java-Hello-World-Enterprise-Edition/tree/master/src/com/example https://github.com/Hello-World-EE/Java-Hello-World-Enterpris...).