What are iterables and iterators in JavaScript?

What are iterables and iterators in JavaScript?

In JavaScript, an iterable is an object that can be iterated over, like arrays or strings. An iterator is an object that provides a way to access the elements of an iterable one at a time.

Can you give me an example of an iterable?

Sure! An array is a common example of an iterable. For instance, you can iterate over an array of numbers using a for...of loop.

How do I create a custom iterator?

To create a custom iterator, you need to implement the next() method in an object. This method should return an object with value and done properties.

What is the difference between forEach and for...of?

The forEach method is specific to arrays and does not return a value, while for...of can be used with any iterable and allows you to use break and continue.