Functional Programming in JavaScript - Explanation of the Theory Behind This Approach (Includes Code Snippets)

The article discusses functional programming in JavaScript, which is becoming increasingly popular due to its efficiency and readability. Data is processed using first-class functions, meaning they can be passed as arguments, returned from other functions, or assigned to variables. The author emphasizes the importance of avoiding side effects and mutating data, leading to more predictable and maintainable code. Additionally, the article provides various examples showcasing the use of higher-order functions like map, filter, and reduce, allowing concise operations on arrays. In the context of JavaScript, functional programming enables the creation of pure functions, contributing to better testing and code readability. Overall, this serves as an excellent introduction to this paradigm, which is gaining significance in modern web application development.