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Functional Principles Still Matter
- Functional principles like declarativeness, immutability, composition, and purity are valuable but can be challenging to apply to real-world problems that involve side effects and imperative steps.
- While achieving 100% purity in functions is impractical, setting constraints to create predictability can be beneficial, especially in testing scenarios.
- Composability plays a crucial role in functional programming, and dependencies can be managed through injection chains or module imports, each with its own trade-offs.
- Objects or classes can assist in structuring environments around behaviors, helping to isolate external dependencies while maintaining pure-ish behavior contracts.
- Structuring for purity is more effective than solely pursuing purity, and creating well-defined boundaries allows for easier extension and adaptation.
- Immutability aids in improving predictability by ensuring values do not unexpectedly change, with the key being to declare and stick to the intended contract.
- Functional systems should be composed of focused units to enable easier change management and localization as the system complexity grows.
- Functional and object-oriented principles can coexist effectively, with classes managing lifecycle and boundaries while functions express clear logic.
- Applying functional programming tools like purity, immutability, and composition leads to clearer, more testable, and extensible code structures, regardless of the coding paradigm used.
- Clear boundaries and well-defined contracts enhance system understandability, testing, and extensibility, making codebases easier to work with and maintain.
- Functional principles continue to hold significance in software development by promoting control over behavior, clarity over data, and structured, scalable code.
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