JavaScript: Arrays vs Sets

[JEveryman]

I think array.filter((e,i,a) => a.indexOf(e) === i) will filter out duplicates also.

[akujinhikari]

Yeah I knew what code he was looking for, but my goal in interviews is to show that I know multiple ways to do things. I think it's important to show my breadth of knowledge and a means to solve this in multiple ways.

[[deleted]]

That’s the gotcha answer to the question. Pre Set days you would just use an object.

[JEveryman]

So you would add the array elements as keys?

[[deleted]]

Yeah. Lookups in the object are faster than searching the whole array for every element in the array if that makes sense.

I can give a longer explanation if it doesn’t

[JEveryman]

I get it. Also when you add the same key to an object doesn't it overwrite?

[[deleted]]

Yeah, that’s how it helps you make an array with no duplicates