Removing duplicates from an array using Set

Using Set collections, you can easily remove duplicates from arrays. To do this, the array must be converted into a Set collection. Since this collection cannot contain duplicate elements, they will disappear during the conversion. If we then convert the collection back to an array, then we get the array without duplicates.

Let's look at an example. Let's say we have the following array with duplicates:

javascriptlet arr = [1, 2, 3, 1, 3, 4];

Let's create a Set collection based on it:

javascriptlet set = new Set(arr);

Now let's convert our collection back to an array:

javascriptlet arr = [1, 2, 3, 1, 3, 4];
let res = [...new Set(arr)];

console.log(res); // shows [1, 2, 3, 4]