CODEWITHSUNDEEP
scalafunctional-programming
pacman
pacman

Reputation: 837

Different between Eff monad and Free monad

Eff monad looks so much better and more usable than monad transformers and can replace boilerplates with monad transformation, but Free monad can make the exact same thing with providing division between execution and program definition, as consequence Eff monad looks like overhead. If I missed some nuance, please correct me.

Upvotes: 3

Views: 711

Answers (1)

OlivierBlanvillain
OlivierBlanvillain

Reputation: 7768

Monad transformers is what you want to use for you every day programs, it let's you map and flatMap on T in Task[Option[T]], for example.

Free and Eff solve a different problem: they let you write multiple interpreters for your programs (which is most likely overkill for your everyday application). They are both used to build monadic expressions. Eff lets you "split the labor" of interpretation into multiple interpreters, while with Free you typically transform expression "all at once" from their Free structure to another monad.

Upvotes: 4

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