What is the rest operator in ES6 and can you give me examples?

What is the rest operator in ES6 and can you give me examples?

The rest operator in ES6 allows you to represent an indefinite number of arguments as an array. For example, you can use it in function parameters like this: function myFunction(...args) { console.log(args); }.

Can you show me a practical example of how to use it?

Sure! Here's a practical example:

function sum(...numbers) {
    return numbers.reduce((acc, curr) => acc + curr, 0);
}
console.log(sum(1, 2, 3, 4)); // Output: 10

This function takes any number of arguments and returns their sum.

What about using the rest operator with destructuring?

Great question! You can use the rest operator in destructuring assignments as well. For example:

const array = [1, 2, 3, 4, 5];
const [first, ...rest] = array;
console.log(first); // Output: 1
console.log(rest); // Output: [2, 3, 4, 5]

Here, first gets the first element, and rest gets the remaining elements.