uniqueElements

Finds all unique values in an array.

• Create a new Set() from the given array to discard duplicated values.
• Use the spread operator (...) to convert it back to an array.

const uniqueElements = arr => [...new Set(arr)];

uniqueElements([1, 2, 2, 3, 4, 4, 5]); // [1, 2, 3, 4, 5]