drop down list video

Hello teachers, can you record a video explanation on making a drop-down list? Hello teachers, can you record a video explanation on making a drop-down list? Hello teachers, can you record a video explanation on making a drop-down list? Hello teachers, can you record a video explanation on making a ...

P粉246262122 2022-08-19 16:59:13 0  0  2182

Python two lists added

There is a set of lists, a, b, c,..., and I want to continuously add this set of lists to the same list, for example: {code...} I only thought of using a for loop to do this, what is more pythonic? method?

習慣沉默 2017-05-18 10:58:37 0  4  696

python - How to do frequency statistics on a list within a list?

For example this list: {code...}

仅有的幸福 2017-05-18 11:02:05 0  3  640

Union two tables with different number of columns

I have two tables (Table A and Table B). The two tables have different number of columns - let's say table A has more columns. How can I merge these two tables and get null values ​​on columns that table B doesn't have?

P粉879517403 2023-08-24 18:54:05 0  2  525

List image does not appear

PHP list image does not come out

XXOO 2019-02-22 15:37:15 0  2  1335

MySQL: Guide to Opening and Transposing Lists

I have a given dataframe: list of id numbers 2[1,2,5,6,7]5[1,2,13,51,12] where one column is just the id and the other is a list of numbers like I As previously obtained from a JSON file, is there a way to convert it to this format using just MySQL? List of id numbers 21222526275152513551512 I know ...

P粉103739566 2023-09-07 13:24:07 0  2  480

php - [WeChat] Get the material list interface, get all when getting the picture and text list? ?

WeChat’s interface for obtaining a permanent material list, the parameters are written as follows: The document states: The number of returned materials is between 1-20. I get the picture material list, no problem, I can control the returned quantity through the count parameter. But when getting the...

过去多啦不再A梦 2017-05-24 11:34:22 0  1  1014

javascript - When the data in redux is obtained from the list page, why is it printed twice in the list component?

Technology stack: react+redux+react-router v4 When the data in redux is obtained from the list page, why is it printed twice in the list component? It's reasonable to just print it once. If the first time I print the list, there is no data, but the second time there is data, then there will be a pro...

黄舟 2017-06-12 09:24:50 0  2  668

Why do I write the table code first and then the list code? Why is the list code displayed first?

? ? ? ? Why do I write the table code first and then the list code? Why is the list code displayed first?

喜欢灭绝师妹 2018-10-12 15:59:18 0  2  1388

PHP cURL not showing all DOM tags when reviewing collection

I want to implement some code to collect comments from specific page DOM. The cURL results are incomplete and I don't know why because some subtags in the DOM are not visible in the results. The DOM looks like this in the inspector: I tried to collect the DOM using the following code snippet: $domai...

P粉677684876 2023-09-12 20:03:06 0  1  590

Create an inline form in rows and columns

I'm trying to learn bootstrap grids and would like to create a row with two columns: one wide and one not so wide. In the left column I want to place an inline form, and in the right narrower column I will place another form with buttons. I copied the Bootstrap example with one row and 2 columns, th...

P粉904191507 2024-03-29 16:34:14 0  1  348

Returns a sequence of DT::datatables in a list of knitted HTML documents

I have a function that returns a series of tables. I want to return them all as DT::datatable. However, I cannot get R to return these tables when they are in a list. They appear in RMarkdown files but not in knittedHTML files. Is it possible to have a table appear in an HTML document? ---title:&quo...

P粉510127741 2023-09-15 13:55:12 0  1  982

CSS: Modify spacing between list items

I tried editing the CSS of the list but I didn't find how to correctly go to the rows and adjust the height between the list elements. Website link: https://denkimedia.com/prod/K2211001/test/ The menu opens but I don't know how to fix the size between list elements: Displaying list not working prope...

P粉436410586 2024-04-02 15:46:38 0  1  411

javascript - js deletes a certain row in one list and deletes the corresponding index row in another list

RT! When a certain row in list A is clicked and a delete event is executed, and then the corresponding row in list B is deleted, I want to achieve this through the index method. But when I executed the delete event for the first time, the correct corresponding rows were deleted in the corresponding ...

学习ing 2017-06-12 09:28:30 0  3  1023

How can I get the complete list of all book categories in the table?

I have a "Books" table like this: I'm trying to make a SpringBoot application where all these books are listed, but you can filter them by category. To do this, I want to display a list of each category so the user can click on the category they want. What's a better way to get a list of t...

P粉681400307 2024-03-28 19:11:27 0  1  331

In Mysql, batch add multiple columns to table based on another column

I have a table with three columns. For each id, we have up to 400 index values. I want to add columns based on the number of index. In the example I provided, I have 4 indexes and then I added four columns to the table. This is the table I have: Createtablebuy_sell(idint,idxvarchar(255),sellfloat(2,...

P粉336536706 2023-08-28 11:03:44 0  1  484