三個(gè)方式其實(shí)效果差不多谆膳，只是為了更兼顧不同的環(huán)境限制
let arr = [1, 2, true, false, [1, 2], 2, "4", 5, 4, {}, 8, "", "4", 6, false, 6, NaN, 8, 7, [2, 3], 5, 6, "", "6", 4, 8, [1, 2], 3, 1, "8", 4, "6", 9, true, 5, 9, NaN, {}];
function re_1(arr) {
return Array.from(new Set(arr));
}
function re_2(arr) {
let arrNew = [];
for (const iterator of arr) {
if (!arrNew.includes(iterator)) {
arrNew.push(iterator);
}
}
return arrNew;
}
function re_3(arr) {
let arrNew = [];
for (const iterator of arr) {
if (iterator !== iterator) {
let len = arrNew.length;
let i = 0;
arrNew.forEach(eleValue => {
if (!(eleValue !== eleValue)) {
i++;
}
if (len == i) {
arrNew.push(iterator);
}
});
}
else if (arrNew.indexOf(iterator) === -1) {
arrNew.push(iterator);
}
}
return arrNew;
}
console.log(re_1(arr).sort());
console.log(re_2(arr).sort());
console.log(re_3(arr).sort());
