[JavaScript知识库]JavaScript 数组去重

function quchong(arr) {
    if (!Array.isArray(arr)) {
        return arr;
    }
    const temp = [];
    for (let i = 0; i < arr.length; i++) {
        if (temp.includes(arr[i])) {
            arr.splice(i, 1);
            i--;
        } else {
            temp.push(arr[i]);
        }
    }
    return arr;
}