Scala

1. A Taste of Scala

   Scala's core syntax, vals and vars, expressions, classes, traits, and a quick tour of language features.

2. Types and Generics

   Type inference, generics, intersection and union types, variance, opaque types, and structural types.

3. Methods and Control Structures

   Method definitions, default and named parameters, extension methods, and control structures including for expressions and match.

4. Domain Modeling (OOP)

   Classes, traits, enums, case classes, and objects used to model domains with OOP.

5. Functional Programming

   Immutable values, pure functions, higher-order functions, and functional error handling.

6. Collections

   The Scala collections library: Vector, List, Map, Set, and common transformation methods.

7. Contextual Abstractions

   Given instances, using clauses, extension methods, type classes, and context bounds.

8. Concurrency

   Futures, promises, and execution contexts for asynchronous programming.

9. Interacting with Java

   Using Java collections, classes, and exceptions from Scala code.

10. Metaprogramming

    Inline, compile-time operations, macros, and quotes and splices in Scala 3.

11. Build Tools and sbt

    Building, running, and testing Scala projects with sbt.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.

Source: endoflife.date