去除数组的重复值

        var array = [0,0,0,1,2,3,"1",undefined,undefined];
        var len = array.length;
        var result = [];
        var keys = {};
        for(var index = 0;index < len;index ++){
            var temp = array[index];
            var type = typeof temp;
            if(!keys[temp]){
                keys[temp] = [type];
                result.push(temp);
            }else if(keys[temp].indexOf(type) == -1){//"1"跟1的key会冲突，都是"1"，所以要根据类型进行判断
                keys[temp].push(type);
                result.push(temp);
            }
        }