javascript - Can I use setAttribute/removeAttribute to add or delete class names?

In a group discussion about the operation of class names in native js, someone suggested that the setAttribute and removeAttribute methods can be used to operate class names. I felt very puzzled: I thought there were only classList.add() or classList.remove(). Methods can solve this need, but someon...

过去多啦不再A梦 2017-05-19 10:46:49 0  3  1057

golang - mgo （mongodb go）如何进行类似shell 的save 或者c#驱动的replace操作？

mgo （mongodb go）如何进行类似shell 的save 或者c#驱动的replace操作？

漂亮男人 2017-04-28 09:06:20 0  1  780

php - How does Yii flexibly configure the type and number of points affected by the entire site operation?

Operations such as user posts, favorites, support, opposition, etc. all involve the increase or decrease of the user's points, but points are divided into N types. How to uniformly manage which type of points are associated with these operations and the amount of increase or decrease? For example: w...

習慣沉默 2017-06-07 09:23:06 0  1  911

javascript - How to display a novice operation guide process similar to that in an APP game to the background operating system?

I have recently developed an ERP management system and would like to add novice operation tutorials to the entire system so that unfamiliar colleagues can learn how to operate the entire system. Just like the novice operation tutorial in the APP, how to implement the game guidance after entering the...

淡淡烟草味 2017-06-10 09:49:06 0  2  836

php - In mysql, is it more efficient to use int type as a primary key field than char type?

In mysql, is it more efficient to use int type as a primary key field than char type? Due to business requirements, it is necessary to use timestamp + 2 random numbers to form the ID. For example: 149561542040, a total of 12 digits. If the ID field uses integer bigint, will it be more efficient than...

黄舟 2017-05-25 15:08:20 0  2  840

memcached - redis或memcache缓存操作类封装有哪些点需要注意?

新公司在用lumen重构做微服务api框架,上面安排在lumen原有基础上再封装一套缓存操作的类库,想问问这方面有什么需要注意的. 目前架构师给的建议有 未连接上redis或者memcache时取真实数据 get获取缓存时候检测是否...

習慣沉默 2017-04-26 09:02:05 0  1  771

php - In a production environment, how can we add indexes to MySQL and modify the table structure so that our online business is not affected?

In a production environment, how can we add indexes to MySQL and modify the table structure so that our online business is not affected? Because there are writing and reading operations to the library at any time online.

某草草 2017-05-27 17:38:57 0  1  743

Many operations can be implemented directly in excel. Why do you need to write such a complicated mysql language? What are its advantages?

Many operations can be implemented directly in excel. Why do you need to write such a complicated mysql language? What are its advantages?

薄荷叶草香 2019-05-20 21:01:20 0  1  1278

node.js - When node operates mysql, why do some query strings use backticks `` and some use double quotes ""

When using node to operate mysql, why do some query strings use backticks `` and some use double quotes ""? What is the significance of this? I hope the doubts can be answered {code...}

曾经蜡笔没有小新 2017-05-31 10:39:18 0  2  685

Solve the problem of operation error when pythonanywhere connects to MySQL database

I have finished my django project and I want to test it on PythonAnywhere, everything was fine until the mysql database connection showed an error to which I have paid subscription. An operation error occurred on /home/ (1044, "Access to database 'almx98' for user 'almx98'@'%' is denied") ...

P粉459440991 2024-03-31 22:43:19 0  1  598

How to close mysql error prompt

For example, what is the way to turn off error prompts in native mysql and pdo classes to avoid error messages being discovered by hackers. Please give me more details on how to modify it.

按键盘手指磨破皮 2017-09-22 22:32:48 0  2  1398

When running the article classification function, it prompts that the database PDO preprocessing operation failed.

public function query($sql,$batch=false){        $data=$batch?$this->data:array($this->data);        $this->data=array();        //

D 2019-05-29 11:16:32 0  0  1221

mongodb - Problems with operating Json type

There is a Document in mongodb: {code...} I put it in Greenplum for analysis and store it in Json type. {code...} Some simple queries will work; {code...} But, {code...} why not? Report syntax error.

给我你的怀抱 2017-05-31 10:35:19 0  2  705