How do first-class functions affect code structure?

Can you explain how first-class functions influence the structure of code?

First-class functions allow functions to be treated as first-class citizens, meaning they can be assigned to variables, passed as arguments, and returned from other functions. This flexibility can lead to more modular and reusable code.

What are some practical examples of this in JavaScript?

In JavaScript, you can pass functions as arguments to other functions, like in the map method. This allows for cleaner and more expressive code.

How does this affect code readability?

Using first-class functions can enhance readability by reducing boilerplate code and making the intent clearer, especially when using higher-order functions.

Are there any downsides to using first-class functions?

One downside is that it can lead to more complex code if overused, making it harder to follow the flow of execution.

Can you give an example of a higher-order function?

Sure! A common example is the filter function, which takes a predicate function as an argument to determine which elements to include in the new array.