[Codewars] Remove duplicate words (7 kyu) / JavaScript

https://www.codewars.com/kata/5b39e3772ae7545f650000fc

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DESCRIPTION:

Your task is to remove all duplicate words from a string, leaving only single (first) words entries.

Example:

Input:

'alpha beta beta gamma gamma gamma delta alpha beta beta gamma gamma gamma delta'

Output:

'alpha beta gamma delta'

 

코드

function removeDuplicateWords (s) {
  return [...new Set(s.split(' '))].join(' ');
}