Title rewritten as: Recursive async function cannot return value

I'm making a recursive async function that is running a mysql query. This is the database I'm using: +----+-------------------+----------+---- ------+-----------+---------------------+|id|task|completed|parentid| createdby|createdat|+----+-------------------+

P粉729518806 2023-08-29 21:11:13 0  2  555

javascript - Time dimension of recursive functions in native JS

1. Question: Today I occasionally saw a "new word" about the time dimension of native js recursive functions. Please help all the experts and seniors to clarify...

phpcn_u1582 2017-06-12 09:24:23 0  1  628

Revealing the secrets of recursive functions in PHP for ordinary people

Can anyone explain to me recursive functions in PHP (without using Fibonacci) in layman's terms and using examples? I'm looking at an example but Fibonacci is completely lost on me! Thank you in advance ;-) Also, how often do you use them in web development?

P粉211600174 2023-10-17 08:41:23 0  2  752

javascript - Will parameters change when calling recursively in js

For a recursive function as shown below, why does args.concat(i) not increase according to the loop? args is a reference type. In my mind, this args will put 0-9 in it during the loop. {code...}

phpcn_u1582 2017-05-19 10:41:24 0  2  628

python - How does pyspider pass information to the next function, but not through the url

Sometimes it is necessary to pass information directly to the next function through pyspider, but there is no need to cral a new URL. For example, a certain part of the information on a list page needs to be passed to the next function, but you do not want to pass it through the URL of the list. I t...

淡淡烟草味 2017-05-18 11:00:39 0  2  600

javascript - How to solve the problem that when a for loop calls a recursive function, the data contains the previous data record? ?

{Code...} When the recursive call getchild($pid) is called in a loop, the child comments under each parent comment will include the child comments of the previous parent comment. How to solve this? I know it's due to static $arr; static variables. But due to business needs, I need to take out such d...

某草草 2017-07-04 13:46:06 0  1  841

JavaScript: increment and decrement functions

I'm practicing my JavaScript skills, I've been mastering a simple incrementing counter function, I seem to have it figured out, so today I want to take that script to the next level and decrease the value, here is my question, When I click to add a number and then continue to click on the minus sign...

P粉761718546 2024-01-29 09:53:20 0  1  513

How to pass parameters to function in React Query's useQuery function when enabled is set to false?

I'm creating a query that allows me to copy a template. The query to copy the template requires an id, but initially there isn't any. How can I pass the id as parameter to the query function when I call it in the onClick function. Function to copy templates: duplicate:({queryKey:[_key,id]})=>axio...

P粉493313067 2023-08-26 19:27:17 0  1  571

The role of javascript function passing undefined as parameter

{Code...} This is a code snippet I saw in the manual about what the bind() function does when it passes in the second argument, where it passes undefined as the argument. I have also seen the practice of passing undefined parameters in some frameworks, but I have not been able to find a comparable m...

伊谢尔伦 2017-05-19 10:44:01 0  4  692

Can a child component pass a function with an id parameter to the parent component?

Is it possible to pass a function with an id parameter from a child component to a parent component using React? I'm trying to pass the function as a prop to it's parent component. The component solution is App component->TasksList component->Task component. So I need to route to a specific ta...

P粉550323338 2024-03-20 10:58:24 0  1  445

Confused about php recursion?

{Code...} I searched this recursion on the Internet. The more I read his comments, the more confused I became. The following recursion has the same function as it. {Code...} Can you help me analyze the difference between the following functions? Is the comment on the first recursion correct?

黄舟 2017-06-30 09:56:06 0  2  880

How to pass what a function calculates as a variable

How can I pass what the function calculates into a variable. {code...} As shown in the code, I use this calculation to output the image address I want, and then display the image on the page through the following code {code...} But how do I pass the content calculated by the first code to Second par...

天蓬老师 2017-06-26 10:55:07 0  2  876

How to pass function to dynamically created href?

I'm trying to pass a function to the href attribute of my a tag link but it doesn't work no matter what I try. It either results in a 404 page or is simply unclickable. What did i do wrong? This is not clickable<body><aid="specialLink"href="#"onClick="redirectToApp(...

P粉571233520 2023-09-22 09:37:55 0  1  1105

Migrating to PHP 8.1 - How to fix deprecated passing null to parameter error - Rename build in function

PHP8.1 has deprecated passing null as a parameter to many core functions. My main problem is with functions like htmlspecialchars(php) and trim(php) where null is no longer silently converted to an empty string. To solve this problem without using a lot of code, I tried renaming the original built-i...

P粉420868294 2024-01-10 16:21:21 0  2  535

python - passing parameters between different routes in flask

Recently, I used flask to develop a web application, which has a search page and a results page. The search page has multiple forms. Currently, these forms have been successfully processed in the routing function of the search page, and the results are stored in a list type variable. , I want to pas...

PHP中文网 2017-05-18 10:49:28 0  5  1290

Recursive call - javascript recursive array recursion problem

Now there is a need to assemble a tree node based on the data requested by the server, that is, the parent-child node. The data structure after the server request is as shown below. Topology is an object, and the key under the object is a parent and value. is the child array. For example, 1 in the p...

阿神 2017-06-26 10:50:17 0  3  962

Python equivalent of the "INET6_ATON" SQL function

I want to convert a PHP program using MySQL to Python. I found a way to store the database, but I need to find a Pythonic replacement for the INET6_ATONSQL function. Can anyone help me?

P粉030479054 2023-09-06 14:36:14 0  1  477

How to get variable value in blocking function in python

Currently, the C++ embedded python function is used. The python function is a blocking type of receiving server messages. There will be no return value until the monitoring is exited. When the message is received during monitoring, a callback function of python will be called. The received message c...

迷茫 2017-06-17 09:15:52 0  1  959

javascript - There is a function A that obtains data asynchronously. Do other functions that rely on the data obtained by A must be asynchronous?

Now the situation is like this, function a returns data asynchronously from Promise, and many other functions need to use this data. Now every function that relies on this data needs to process a().then() like this {code...} Among them are Some recursive circular dependencies. After the complexity i...

黄舟 2017-07-05 11:05:24 0  3  969

Questions about javascript recursive functions. Please ask a master.

Good evening, sir, please help me find out why my function cannot be executed? Description of the situation: Since the table in the div is loaded through ajax, the purpose of the function is to determine whether there is such a table. If so, make its background red. If not, execute the following fun...

漂亮男人 2017-06-28 09:24:22 0  2  704