What is the difference between rest and spread parameters in JavaScript?

Can you explain the difference between rest and spread parameters in JavaScript?

Sure! Rest parameters allow you to represent an indefinite number of arguments as an array, while spread parameters expand an array into individual elements.

Can you give me an example of how to use rest parameters?

Of course! You can use rest parameters like this: function sum(...numbers) { return numbers.reduce((a, b) => a + b, 0); }.

And how about an example of spread parameters?

Certainly! You can use spread parameters like this: const arr = [1, 2, 3]; const newArr = [0, ...arr, 4]; which results in [0, 1, 2, 3, 4].

Are there any specific use cases for each?

Yes! Rest parameters are great for functions that need to accept multiple arguments, while spread parameters are useful for combining arrays or passing elements to functions.