Scala journey with exercises, explanations and links to blogposts and talks.

The agenda is composed of 6 weeks of individual trainings, with the purpose of talking about some of the inners of the Scala language and functional programming principles.

The lessons are:

1. Scala and Sbt basics

   • val, var, def, lazy, trait, sealed, imports, functions, type inference
   • talk about imports
   • sbt talk - dependencies mainly

2. Functional programming principles:

   • immutability
   • pureness + referential transparency
   • functions + function composition
   • recursiveness
   • higher order functions
   • ADTs
   • talk about types - generics and relevance
   • why is this relevant? testing and correctness

3. Scala standard library:

   • list, sets, option, either
   • functions - filter, map, flatMap, exists, contains, etc

4. Functional composition through monads:

   • what functors and monads are and how they are relevant - their relationship with function composition
   • for-comprehensions
   • monadic design

5. Implicits:

   • types of implicits
   • usefulness
   • case study: Future[] flow
   • their scope

6. Play framework:

   • overall architecture of an app
   • controllers -> services -> repositories. models
   • anatomy of an endpoint - from routes, to controller, and so on
   • anatomy of a controller function
   • keywords: @Inject() and others
   • connectors and their crucial importance in our platform architecture

Throughout the resources, I will also be referencing chapters from https://github.com/robertbutacu/bachelor-degree-work.