# 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:

`let arr = [1, 2, 3, 1, 3, 4];`

Let's create a `Set` collection based on it:

`let set = new Set(arr);`

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

`let arr = [1, 2, 3, 1, 3, 4]; let res = [...new Set(arr)]; console.log(res); // shows [1, 2, 3, 4]`

Write a function that takes an array as a parameter and returns this array without duplicates.

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