What are some real-world uses of anonymous functions?

What are some real-world uses of anonymous functions?

Anonymous functions, or lambda functions, are often used in programming for tasks like callbacks, event handling, and functional programming.

Can you give me an example of how they are used in JavaScript?

Sure! In JavaScript, anonymous functions are commonly used in array methods like map, filter, and reduce. For example, array.map(item => item * 2) doubles each item in the array.

Are there any performance benefits to using them?

Yes, using anonymous functions can lead to cleaner code and improved readability, which can enhance maintainability. However, performance differences are usually minimal.

What about their use in Python?

In Python, anonymous functions are created using the lambda keyword. They're often used for short, throwaway functions, like in sorted(list, key=lambda x: x[1]) to sort by the second element.