Collections functions
In the previous chapter, we dipped our toes into collections while exploring lambda expressions, laying the groundwork for a functional programming approach. In this section, we’ll take a closer look at collection functions – powerful methods such as filter, map, fold, and groupBy that enable you to manipulate data with clarity and efficiency.
These functions are more than just tools; they embody a declarative way of thinking about data processing. Instead of describing how to iterate over elements, you specify what transformation or filtering you need, making your code more readable and maintainable. This is especially important in modern software development, where concise and expressive code can significantly improve productivity and reduce errors.
To provide a practical context, we will begin by comparing how Java and Kotlin handle common operations such as filtering. This not only highlights Kotlin’s streamlined syntax but also...
