Monad to Monad Transformers
Monad transformers enable combining multiple monads.
Below is the Scalal program to use the EitherT monad transformer to combine Option and Either monads:
import cats.Monad
import cats.data.OptionT
import cats.instances.option._
// Define a monad transformer for Option
type OptionMonad[A] = OptionT[Option, A]
// Define a monad instance for OptionMonad
implicit val optionMonad: Monad[OptionMonad] = OptionT.catsDataMonadForOptionT
// Test the monad transformer
val maybeIntT: OptionMonad[Int] = OptionT.some(5)
val doubledT: OptionMonad[Int] = for {
value <- maybeIntT
} yield value * 2
// Unwrap the transformer to get the result
val result: Option[Int] = doubledT.value
println(result)
Output:
Monad to Monad Transformers
What is Lifting in Scala?
Scala is a programming language that is expressive and effective. It permits builders to produce code that is both elegant and succinct. Lifting is one such belonging that is vital to useful programming paradigms. Functions may fit easily on values interior containers, such as Option, List, Future, and many others., thanks to lifting, which gets rid of the need to manage the structure of the container manually. This article will explain the idea of lifting in Scala, spotlight its importance, and provide utilization examples.
Table of Content
- Partial Functions to Functions
- Methods To Functions
- Pure Functions to Effectful Functions: Functors
- Monad to Monad Transformers
- Conclusion