js数组去重

<script>
    var arr1 = [1, 1, 2, 2, 3, 3, 4, 4, 6, 1];
    var arr2 = [];
    for(var i = 0; i < arr1.length; i++) {
        
        var status = 0;
        for(var j = 0; j < arr2.length; j++) {
            if(arr1[i] == arr2[j]){
                status = 1;
                break;
            }
        }
        if(status == 0){
            arr2.push(arr1[i]);
        }
    }
    for(var x in arr2){
        document.write(arr2[x]+'<br>');
    }
</script>

数组去重，重新写一个数组。还有记得设定状态status。让他循环过来的时候状态改变为0.