Scala

Interpreter is a language (or program) to evaluate expressions and execute code. The intent is to keep the evaluation lazy and pure. There are 3 different kinds of methods in the interpreter pattern / …

Monad typeclass trait Monad[F[_]]: def pure[A](a: A): F[A] def flatMap[A, B](fa: F[A])(f: A → F[B]): F[B] Monad Laws pure(a).flatMap(f) = f(a) m.flatMap(pure) = m m.flatMap(g).flatMap(h) = m.flatMap(b …