PodRocket - A web development podcast from LogRocket A guide to functional programming By Jemima Abu
Apr 24, 2025
Jemima Abu, a Senior Product Engineer at CAIS, shares her straightforward take on functional programming in JavaScript. She emphasizes the importance of predictable code and pure functions for software quality. Jemima also discusses the balance between purity and practicality, revealing how to effectively use higher-order functions like map and reduce. Her insights on immutability and the need for side effects in real-world scenarios provide valuable tips for developers aiming to enhance their coding practices.
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Functional Programming Simplifies Code
- Functional programming makes code predictable, so you can expect the output of a function reliably.
- It also enhances readability, reusability, and scalability, qualities of good code.
Pure Functions Explained
- Pure functions always return the same result for the same input without side effects.
- Side effects are any unexpected changes outside the function's scope, which make a function impure.
Use Immutability to Avoid Bugs
- Avoid mutating variables directly to prevent unpredictable side effects in your code.
- Instead, make copies of data before changing them to improve reliability and maintainability.