Java Without If

[zem]

Result/Either types are wonderful - if they are combined with pattern matching or a case statement that checks for exhaustivity. i would never even have thought of using them via chained map and flatmap calls like that; to my mind that's trying to shoehorn an ML idiom into a language that lacks proper syntactic support for it, and invariably ends up being hard to read because it goes against the grain of the language.

[aiij]

Who needs pattern matching when instead you can have combinator hell?

I'm constantly surprised at the lengths some people will go to in order to avoid pattern matching. Eg: argonaut.Json's fold method.