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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Quick takeaways
- Predictability in functional programming is crucial as it enhances code readability and maintainability through the use of pure functions.
- Immutability is essential to prevent side effects in JavaScript, encouraging developers to create copies of data instead of directly modifying variables.
Deep dives
Predictability in Functional Programming
Functional programming emphasizes the importance of predictability in coding, allowing developers to anticipate the output of functions based on given inputs. This is achieved through the use of pure functions, which consistently return the same results without introducing side effects. For instance, a function designed to add two numbers must only perform that task and refrain from any additional actions, like outputting unexpected results. This predictability enhances the readability and maintainability of the code, making it easier for developers to collaborate and understand each other's work.
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