When should I use rest vs spread operators in JavaScript?

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

Sure! The rest operator (...) is used to collect multiple elements into an array, while the spread operator (...) expands an array into individual elements.

Can you give me an example of when to use the rest operator?

Absolutely! You can use the rest operator in function parameters to gather all remaining arguments into an array. For example: function sum(...numbers) { return numbers.reduce((a, b) => a + b, 0); }.

And what about the spread operator?

The spread operator is useful for expanding arrays or objects. For instance, you can combine two arrays like this: const combined = [...array1, ...array2];.

Are there any performance differences between them?

Generally, there are no significant performance differences, but it's best to use each operator in its intended context for clarity and maintainability.