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442: Paradigms - What is a Program?
The Bike Shed
Exploring Pure Functions and Encapsulation in Ruby
Encapsulation of complexity in programming can be achieved through the use of pure functions, which operate exclusively on the data provided to them and solely return output without any side effects. This localized behavior allows functions to be executed without concern for unintended mutations or actions, enhancing encapsulation and reliability in code. Although pure functions themselves do not interact with the external world, creating useful software necessitates that these functions be integrated into a broader architecture that manages user input and side effects. This interplay suggests the importance of combining functional principles at the core of applications with more traditional procedural programming at the periphery. Notably, Ruby's core library reflects these concepts through the distinction between bang methods (which mutate objects) and non-bang methods (which return new or copied objects), prompting developers to consider their approach to function design and object mutation in pursuit of cleaner and more functional code.
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