Rock the JVM

JULY 9, 2023

toList ())) } } } Finally, we solved all the problems we found with the previous solution. In Scala, we had a very close problem with the Tagless Final encoding pattern. If you don’t know Scala or Tagless Final, just skip the Scala code - it’s a small comparison. Each Job has an id , company , role , and salary.

Scala 52

Scala Java Software Engineer Software Engineering 52

Rock the JVM

JANUARY 22, 2024

This style is sometimes called “ tagless final ”, even though the original theory of Tagless Final is far more formal and separated from the concept of type classes than the representation we’re picking here ( F[_] with type class constraints). First, the Postgres, just like in `JobsPlayground: import cats.effect.

Scala 58

Scala SQL Database Coding 58

Rock the JVM

MAY 22, 2023

The ZIO philosophy avoids capability declaration by implicit type class instances (a form of the tagless final pattern ). It’s built on similar principles as Cats Effect, although it diverges in a few fundamental aspects. First, it doesn’t use type classes. Second, it opts for more practicality with layers.

Scala 52

Scala Java Programming Language Programming 52

Rock the JVM

APRIL 24, 2024

import java.util.UUID final case class User ( id : UUID , name : String , email : String ) Config.scala placed in src/main/scala/com/rockthejvm/domain. final case class Config ( host : String , port : Int , username : String , password : String , database : String ) derives ConfigReader 5. for storing User data. import fs2.Stream

Scala 58

Scala Database PostgreSQL SQL 58