Question from the Javascript - Fundamentals test

const uniqueArray = [...new Set(array)];

function uniqueArray(array) {
  let out = [];
  for (let i = 0, len = array.length; i < len; i++)
    if (out.indexOf(array[i]) === -1) out.push(array[i]);
  return out;
}

const uniqueArray = array.filter((val, ind, arr) => arr.indexOf(val) === ind);

function uniqueArray(array) {
  let result = [];

  for (let str of array) {
    if (!result.includes(str)) {
      result.push(str);
    }
  }

  return result;
}