Part 1: Foundations

01: Learning a New Language

02: Modelling With Types

03: Checking Invariants

04: Maintaining Invariants

05: Arrays and Iteration

06: Mutation and Side Effects

07: Asynchronousity

08: Designing for Failure

09: Verifying Behaviour

Part 2: Abstraction

10: Building Abstractions

11: Decomposing Systems

12: Encapsulating What Varies

13: Implementation Freedom

14: Defining Boundaries

15: Extending Behaviour

16: Growing Systems

17: Coupling

18: Consuming Data

19: Designing APIs

20: Code Quality, Refactoring

21: Debugging

22: Adding New Features

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