javascript - tree structure data traversal

How to traverse tree-structured data like this?

PHP中文网 2017-05-19 10:10:21 0  2  821

javascript - js writes a recursion to restructure the data structure into another structure

Now there is the following data structure: {code...} Write a JS method to convert it into the following format data: {code...}

天蓬老师 2017-06-28 09:27:56 0  3  994

javascript - Determine the character length and generate json data in a dom tree structure.

There is a piece of data with such a structure. There are many pieces. We need to judge the series based on the length of the level and generate the json data of the DMO tree results. How to achieve this? ? It probably produces the following structure, which is just one of the array objects.

某草草 2017-05-19 10:17:12 0  2  622

mysql - database table structure design

Describe the requirements: Now we need to design the database table structure. There are many types of rules. How to design tables to store these rules. Each rule has common attributes and different attributes. Currently, I think of two methods: the first is through foreign keys (common attributes o...

習慣沉默 2017-06-30 09:55:23 0  3  1076

mysql - Database storage structure and index issues

Assuming that a node can hold 100 values, then a 3-layer B-tree can hold 1 million data. How do you get 1 million? Is B+ tree used because it has fewer layers than B tree? The index is a B-tree structure and is stored in a file. When querying, do you query the reference address of the data?

给我你的怀抱 2017-06-22 11:54:32 0  1  956

promise.all mongoose operates database - Stack Overflow

Use Promise.all([p1, p2]) to operate two promise functions. Both functions use mongoose internally to operate the database. If p1 is rejected and p2 is resolved. My question is, p2 has actually performed an operation on the database, is that so, or...

曾经蜡笔没有小新 2017-06-15 09:22:14 0  2  923

java - Using RedisTemplate to manipulate data

The difference between using RedisTemplate’s execute() method and opsFor*() to operate data

世界只因有你 2017-05-16 13:19:25 0  1  693

javascript - Use moment.js to generate the data structure of the calendar for the specified month

Please give me a best practice. I’m not familiar with moment (I’ve been looking at the API for a day and I understand the basics). I don’t want to take the wrong path, so I can just give you the final data structure, such as [[26,27,28,1,2 ,3,4], [], [], ...] Thanks, ugh haha

天蓬老师 2017-05-19 10:24:49 0  3  1342

javascript - How to traverse the json data structure returned by the background if it is too deep?

How do I loop through the json data with this structure to get the deepest one, and I use the string splicing method. If I render below, I can only use a for loop. Is there any way to use a large for loop to loop through it? Data? ? ? please help

某草草 2017-05-19 10:18:40 0  3  686

Golang, MySQL, unable to append query data to list of structures

When I try to parse the data into a struct and then append it to the slice, I get nothing. But if I use the query in MySQLWorkbench, I get some values...query,err:=db.Query("SELECT'description','is_done'FROMtasksWHERE'user_id'=?;",userId)iferr !=nil{returnnil,err}deferquer

P粉135799949 2023-09-04 08:49:25 0  1  587

Database operation to obtain a single result: use mysqli to connect to the database

I'm trying to use mySQLi for the first time. In the case of a loop, I've done this. The results of the loop show up, but when I try to show a single record it gets stuck. Here is the working loop code. <?php//Connect to the database $hostname="localhost";$database="mydbname&quo...

P粉111227898 2023-08-21 22:59:04 0  2  582

How to access the intranet database from the external network?

How to access the intranet database from the external network?

AsNwds_MIS王 2018-05-29 14:56:57 0  0  1223

java - Spring operation database displays garbled Chinese characters?

Operating system: ubuntuIDE:idea Database:Mysql When I use php to operate the database, there is no problem with Chinese display, and Chinese can be displayed normally: But when I am learning spring, when I operate the database, question marks will appear in Chinese, and it cannot be displayed norma...

我想大声告诉你 2017-05-16 13:29:37 0  1  541

Looking for symfony 1.4 propel method to operate multiple databases

Looking for symfony 1.4 propel to operate multiple databases. Practical methods are not required. Do not copy from the Internet. You must operate successfully by yourself. I hope there are detailed step-by-step instructions. Thank you so much!

漂亮男人 2017-05-16 16:45:23 0  2  525

How to query and display data in Symfony2 layout.html.twig?

If there are public parts in layout.html.twig such as the sidebar that need to be queried and displayed, what is the best way to do it?

过去多啦不再A梦 2017-05-16 16:46:16 0  2  642

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  727

Design a database table structure that meets the following business requirements?

I was stumped by the last question in today's interview: (original picture) Design a database table structure that meets the following business needs: 1. A certain merchant holds a lottery for playing games for a period of time. Only users who play the game with 50 points or more can win the lottery...

phpcn_u36412 2018-03-14 23:00:16 0  1  1309

python - How does SQLAlchemy insert data into the corresponding id?

I want to insert or modify a piece of data in the row corresponding to the id, but I don’t know how to do it.

巴扎黑 2017-05-24 11:34:51 0  2  762

Does the carousel deletion operation only delete the data in the database, but not the pictures in uploads?

Does the carousel deletion operation only delete the data in the database, but which corresponding picture in uploads is not deleted?

sui 2017-11-29 16:43:03 0  1  1415

The Linux system does not support PHP operations to access the database. Can you please advise on other solutions?

The database of Windows computer software is accessible. If you want to share data, upload the database mdb file to the web server through php, and then php reads the mdb database into html. When the web server is windows, the test is normal. The Linux system does not support PHP operations to acces...

forever 2017-10-31 14:35:35 0  1  1038