What is the difference between an iterable and an array in JavaScript?

What is the difference between an iterable and an array in JavaScript?

In JavaScript, an iterable is any object that can be iterated over, like arrays, strings, and maps. An array is a specific type of iterable that stores ordered elements.

Can you give me examples of iterables other than arrays?

Sure! Examples of iterables include strings, sets, maps, and even custom objects that implement the iterable protocol.

How can I convert an iterable to an array?

You can convert an iterable to an array using the Array.from() method or the spread operator ([...]). For example, Array.from(new Set([1, 2, 3])) will create an array from a set.

Are there performance differences between using arrays and other iterables?

Yes, performance can vary. Arrays are optimized for indexed access and are generally faster for operations like push/pop. Other iterables may have different performance characteristics depending on their implementation.