When should I use sets instead of arrays in JavaScript?

When should I use sets instead of arrays in JavaScript?

You should use sets when you need unique values and want to avoid duplicates. Arrays are better for ordered collections.

Can you give me an example of when to use a set?

Sure! If you're storing a list of unique user IDs, a set is ideal because it automatically handles duplicates.

What about performance? Are sets faster than arrays?

Yes, sets generally offer faster lookups for existence checks, while arrays are better for indexed access.

Are there any downsides to using sets?

One downside is that sets do not maintain order, so if order matters, arrays might be the better choice.

How do I convert an array to a set?

You can convert an array to a set using the Set constructor: const mySet = new Set(myArray);.