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5

You could create your custom method for extracting Map values as an Either instance and use them in a for comprehension: implicit final class MapOps[A, B](self: Map[A, B]) { def getAsEither(key: A): Either[String, B] = { self.get(key) match { case Some(value) => Right(value) case _ => Left(s"Key not found: $key") } } } case ...


-3

One possible solution is below. These take in a data structure and return another data structure. These delegate and have no ifs or loops. This should have idempotent functions only so it is unit testable. For things depending on the environment, make a interface for a pitiful are role. Then make roles implement the interface with dependency injection ...


4

One way to accomplish what you're looking for is to implement the Observer pattern. For example, instead of having a single, centralized "commands" object that defines all possible commands, you'd have a centralized event dispatcher. Each "command", when instantiated, would register itself with the dispatcher. When the command palette is called, an "event" ...


2

I would suggest you use your Lexer construct as more of a generator, rather than identifying all the tokens at once and sending an entire list to the parser. Your lexer could simply declare an interface with a .NextToken() or .Next() (and probably .Backup()) method and anytime the Parser requires a new token, it could simply call one of those methods. If ...


0

Your question is draws on a large article. But I’ll be shorter. Now I’am just learning Scala and also have similar question as your and I think answer on it will came on time to you while your experience in Scala will growing. You can pick up some well known projects and learning through reviewing code. Good way is to start to contribute project that you ...



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