What are some examples of the spread operator in JavaScript?

Can you explain the spread operator in JavaScript with some examples?

Sure! The spread operator, represented by ..., allows you to expand elements of an iterable (like an array) into individual elements. For example, if you have an array const arr = [1, 2, 3];, you can use the spread operator to create a new array: const newArr = [...arr, 4, 5]; which results in [1, 2, 3, 4, 5].

That's great! Can you show me how it works with objects?

Absolutely! You can also use the spread operator with objects. For instance, if you have an object const obj = { a: 1, b: 2 };, you can create a new object by spreading its properties: const newObj = { ...obj, c: 3 }; which results in { a: 1, b: 2, c: 3 }.

What about combining two arrays?

You can combine two arrays using the spread operator like this: const arr1 = [1, 2]; const arr2 = [3, 4]; const combined = [...arr1, ...arr2]; This will give you combined as [1, 2, 3, 4].

Can the spread operator be used in function calls?

Yes, it can! You can use the spread operator to pass elements of an array as arguments to a function. For example, if you have a function function sum(a, b) { return a + b; } and an array const nums = [1, 2];, you can call the function like this: sum(...nums); which will return 3.