Programming Elixir Chapter 23 Notes

An Elixir behaviour is a list of functions a module is expected to implement.

1. A behaviour module is a bit like an abstract base class.

2. Use @callback to declare a function that must be defined.

3. Behaviours can have a mix of callbacks and implemented functions.

4. @callback declares the parameters and the return type.

5. Behaviours document and enforce the public functions that must be implemented.

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