What are some use cases for the Set object in JavaScript?

What are some use cases for the Set object in JavaScript?

The Set object in JavaScript is great for storing unique values. Some use cases include removing duplicates from an array, tracking unique items, and implementing mathematical set operations.

Can you give me an example of removing duplicates from an array using Set?

Sure! You can create a Set from an array to remove duplicates like this: const uniqueArray = [...new Set(array)]; This will give you an array with only unique values.

What about performance? Is using Set faster than an array for certain operations?

Yes, Sets can be faster for certain operations like checking for existence of an item, as they use a hash table under the hood, making lookups generally O(1) compared to O(n) for arrays.

Are there any limitations to using Set?

One limitation is that Sets only store unique values, so if you need to keep duplicates, you'll need to use an array. Also, Sets do not maintain order for objects.