function uniteUnique(arr) {
// const years = [2016 , 2017 , 2018 , 2016 , 2019 , 2017];
// const distinctYears = [...new Set(years) ];
// console.log(distinctYears);
console.log(arr);
arr = arr.flat(4);
let arr1 = [...new Set(arr)];
console.log(arr1);
return arr1;
}
uniteUnique([1, 3, 2], [5, 2, 1, 4], [2, 1]);
uniteUnique(…arr) solved