Exercise 068: Understanding Behaviours

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Exercise 068: Understanding Behaviours

Topic: Behaviours
Level: 16
Difficulty: 2

Prerequisites

• Exercise 016: Functions
• Understanding of contracts/interfaces

Learning Objectives

Students will learn to:

• Understand what behaviours are
• See @callback definitions
• Know how behaviours ensure contracts

Key Concepts

• Behaviours as contracts
• @callback attribute
• Compile-time checking

Exercise Structure

• Explain behaviours as module contracts
• Show example behaviour with @callback
• Task: Define simple behaviour
• Expected output: Behaviour defined with callbacks

Hints

Behaviours define which functions a module must implement

References

• Elixir docs: https://hexdocs.pm/elixir/typespecs.html#behaviours