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;
}