Working with Arrays in JavaScript - for-of vs. reduce() vs flatMap()

In the article from 2ality, the author explains how array processing works in JavaScript, focusing on a non-destructive approach to handling arrays. Modern programming encourages the use of immutable data structures, leading to safer and more predictable code. The author reviews basic methods such as map, filter, and reduce, showcasing how they can be used to create new arrays based on input data without mutating the original. Code examples illustrate how these methods can be applied in practical situations, providing readers with a deeper understanding of their applications. The article also includes performance suggestions and best practices related to the use of arrays in JavaScript-based applications.