Duplicate String
Create a function that takes a string and returns a new string with duplicates removed.
/*
const str = 'This is is a test test string';
removeDuplicates(str); // 'This is a test string'
*/
const removeDuplicates = (str) => [...new Set(str.split(' '))].join(' ');
const str = 'This is is a test test string';
console.log(removeDuplicates(str)); // 'This is a test string'