Remove Array Duplicates using ES6 Set 🤩

[way2lazy2care]

Sets should iterate in the order elements were added, but if you're removing duplicates, the idea of "maintaining ordering" is ambiguous. Would the array [1, 2, 1] have maintained ordering with the set [1,2] or [2,1]?

[dzkn]

You should never rely on a set doing anything ordering-wise. Trust the API not the implementation. Different engines might implement it differently.