Intermediate Algorithm Scripting: Sorted Union - freeCodeCamp solution

sol.js

function uniteUnique(arr) {

  let newArr = [];

  for (let i=0; i<arguments.length; i++) {
    for (let j=0; j<arguments[i].length; j++) {
      if (!newArr.includes(arguments[i][j])) {
        newArr.push(arguments[i][j]);
      }
    }
  }

  console.log(newArr);
  return newArr;
}

uniteUnique([1, 3, 2], [5, 2, 1, 4], [2, 1]);