Type classes in Scala 3

applying-fp Accepted Talk 45 Mins Intermediate design-patterns
Ayush Mittal
Ayush Mittal
Software Engineer
ING Netherlands
location_city Online schedule Mar 25th 04:00 - 04:45 PM IST place Zoom people 21 Interested

Type classes are a powerful tool in functional programming to enable ad-hoc polymorphism without using object orientated programming based constructs like sub typing. In this talk we look at how to create type classes using Scala 3 constructs such as ‘Givens’ and ‘Extension’ methods.

 
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Outline/Structure of the Talk

  1. Recap of classical Polymorphism (subtyping) - 3 minutes
  2. Concept of Ad-Hoc polymorphism in Scala via typeclasses -  5 minutes
  3. Typeclasses before Scala 3 i.e implicits  - 5 minutes
  4. Implicit hell problem - 2 minutes
  5. Scala 3 extension methods  - 10 minutes
  6. Scala 3 given constructs - 10 minutes
  7. Using extension methods and given constructs to create type classes  - 5 minutes
  8. Questions - 5 minutes

Learning Outcome

  1. Audience will clearly understand the concept Ad-Hoc polymorphism in Scala
  2. Audience will understand on how we implement ad-hoc polymorphism in Scala 3.
  3. Audience will appreciate improvements in Scala 3 over Scala 2.

Target Audience

Scala developers looking to learn Scala 3 aka Dotty features

Prerequisites for Attendees

- Concept of Polymorphism

- Basic scala knowledge

Video


Links

  1. Ayush Mittal at #ScalaUA - Effectful* programming in Scala - https://www.youtube.com/watch?v=kTsAMzar5Qc&t=101s
  2. Effectful programming in Scala by Ayush Mitta - https://www.youtube.com/watch?v=Oc5W3FuK-Hs&t=1899s
  3. A TRACE TO REMEMBER: COMPOSITIONAL TRACING - Ayush Mittal | Scalar 2020 - https://www.youtube.com/watch?v=c71nI2CCmkQ&t=939s
  4. ING Scala Meetup : Working with Dotty - https://www.youtube.com/watch?v=qqqfImDtduE&t=9s
schedule Submitted 6 months ago

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