Best practices and common pitfalls

This section takes a closer look at best practices when working with higher-order functions, delegates, actions, funcs, predicates, and LINQ. We’ll also discuss common mistakes that developers make and offer solutions on how to avoid these pitfalls.

Here are some best practices to use while working with higher-order functions:

• Aim for stateless functions: For consistency and predictability, strive to ensure that the functions you pass as arguments are stateless, meaning they don’t rely on or change the state of anything outside themselves. This makes them more predictable and less prone to side effects.
• Embrace immutability: One of the core principles of functional programming is immutability. When passing objects to your higher-order functions, consider whether they can be made immutable to ensure that the function doesn’t alter their state.
• Use descriptive names: As you are passing around functions, it’...