When should I use the rest operator in JavaScript?

When should I use the rest operator in JavaScript?

The rest operator allows you to represent an indefinite number of arguments as an array. It's useful in functions to handle multiple parameters.

Can you give me an example of how to use it?

Sure! Here's a simple example: function sum(...numbers) { return numbers.reduce((acc, num) => acc + num, 0); } This function can take any number of arguments.

What about using it in array destructuring?

Great question! You can use it like this: const arr = [1, 2, 3, 4]; const [first, ...rest] = arr; Here, first will be 1, and rest will be [2, 3, 4].

Are there any limitations to the rest operator?

Yes, you can only use the rest operator as the last parameter in a function definition, and you can't use it more than once.