Intellij falsely marked some import of Scala implicits as not being use. Is there a way to prevent it from deleting those import when optimized them explicitly for a specific import and not prevent...

I use Scala implicit classes to extend objects I work with frequently. As an example, I have a method similar to this defined on Spark DataFrame: implicit class DataFrameExtensions(df: DataFrame) ...

I am struggling on how to create an instance of Functor[Dataset]... the problem is that when you map from A to B the Encoder[B] must be in the implicit scope but I am not sure how to do it. implic...

I came across an interesting post on twitter by scalaLang. Where this code compiles and works class A(implicit implicit val b: Int) val objA = new A()(42) Can someone please explain me how is...

I have the following snippet of Scala code: import java.io.PrintWriter trait Write[-A] { def apply(out: PrintWriter)(x: A): Unit } trait LowPriorityWrites { implicit object any extends Wri...

The following Haskell type class and instance: class Able a where able :: a -> Int instance Able Int where able x = x is commonly translated to Scala like so: trait Able[A] { def able(a:...

To reduce compile times of my project, I'm caching certain type classes that are resolved by implicit lookups. This appears somewhat cumbersome though, because the straight forward implementation d...