js数组循环删除元素或对象

for(var i=0,flag=true,len=attrList.length;i<len;flag ? i++ : i){
    if( attrList[i]&&(attrList[i].attrId=='530'||attrList[i].attrId=='534'||attrList[i].attrId=='9')){
        attrList.splice(i,1);
        flag = false;
    } else {
        flag = true;
    }
}