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1. Into the Functional Programming
Paradigm with Scala
Piotr Wiśniowski
Scalac

2. Piotr Wiśniowski
Data Engineer at Scalac with a scientific
background. Interested in:
● the newest algorithms,
● solving tough problems,
● architecture solutions
Also, an avid traveler, hiking fan and
sailor.

3. Scalac
● Backend / Architecture
● Frontend / User Interface
● Devops / Infrastructure
● Data Engineering / Data
Science
● Quality Assurance
● Project Management

4. Scalac Summer Camp
https://twitter.com/scalac_io
https://www.facebook.com/scalac.io
recruitment@scalac.io

5. 1st stage:
● 3 days of
basic tools
training
● May 2nd Stage:
● 2 months of working
on real project
● Summer time
3th Stage:
Welcome to Scalac!!!

6. Scalac Summer Camp
Details soon on:
● https://www.facebook.com/scalac.io
● https://twitter.com/scalac_io
● recruitment@scalac.io

7. Why Go Functional?

8. Why Go Functional?
● Avoid confusing corner
cases
● Avoid code errors
● Data processing
● Concurrent processing
● High-critically systems
● Not hard or difficult!
● Test-driven development

9. Functional programming
You already know it!

10. You already know it!

13. Functional Paradigm

18. Benefits
● No state!
● Invert control - caller
always have control over
callee
● Test applications easily
● Read programs easily
● Refactor code without
changing meaning or
behavior
● Reason about program
by using types

19. You lose nothing from OOP
● Single responsibility
● Open-closed
● Substitutability
● Interface segregation
● Dependency inversion

20. Code examples

27. What is next?

28. Future reading
● John De Goes - FP to the Max video
https://www.youtube.com/watch?v=sxudIMiOo68&t=1664s
● Learn libraries like Cats or Scalaz
https://typelevel.org/cats-effect/api/cats/effect/IO.html
● Monads, Comonads, Profunctors, Operads, Fibrations etc.

30. Thank You!