What are some practical use cases for Sets in JavaScript?

What are some practical use cases for Sets in JavaScript?

Sets in JavaScript are great for storing unique values. You can use them for tasks like removing duplicates from an array, tracking unique items, or managing a collection of items where order doesn't matter.

Can you give me an example of removing duplicates using Sets?

Sure! You can convert an array to a Set and back to an array like this: const uniqueArray = [...new Set(array)]; This will remove any duplicate values from the original array.

What about performance? Are Sets faster than arrays?

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

Are there any limitations to using Sets?

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 the order of elements when iterating.