Follow me to truly understand the pitfalls of free OA

Is free OA a trap? As long as you understand this pit, you will be willing to fall into it. The current free OA mainly has the following problems: First, it is free when there are few users, but it is expensive when there are many users; second, simple functions are free, but if you want to use them...

菱纱 2020-06-29 16:02:27 0  1  1276

javascript - How to retain the data obtained through ajax on the second-level page on the first-level page when returning to the previous page

For example, there is a page with a shopping cart on the left and a menu list on the right. Clicking on a certain dish will jump to the corresponding details page of the dish, which is a new page. Select information such as specifications and attributes, and after obtaining it with ajax, you will re...

怪我咯 2017-06-15 09:23:28 0  1  717

"Application exception occurred" memory error when running python program?

I wrote a small python program of about 70 lines to calculate the similarity of documents. The material is 88 paper documents, using the gensim package. The flow of the program is to preprocess the document (delete unnecessary symbols, word segmentation, etc.), calculate the tfidf value of the docum...

世界只因有你 2017-05-18 10:47:38 0  4  944

Asking for help, there is a price

Because I am not interested in programs, I have not studied PHP programs well. Now I need to make a system at the end of the study period. The general content of the system has been completed, but there are some logical bugs that need to be fixed. Please help, there is a price (the number of words i...

Doubledealing 2019-06-14 10:23:51 0  0  1039

Visual Studio Code Intellisense and autocomplete - Vite, JSconfig and aliases - can't figure out the right combination

Just started working with Visual Studio Code again after years of using PHPStorm/Webstorm I decided to make the transition simply because VSCode is so lightweight and I didn't want to rely on a paid service/have it on every computer since VSCode is pretty much everywhere And it's free. I'm starting ...

P粉311563823 2023-11-04 16:37:58 0  1  822

Very helpful, I like this teaching method

My husband is studying, and I occasionally listen next to him. The teacher is very humorous, and what he talks about is easy to understand. Sometimes I, a person who doesn’t know anything, can still understand it, such as the page layout, what elements, etc. . The fees are also very favorable, and t...

李涛 2020-06-02 18:10:53 0  1  839

PayPal API - Increase order amount after authorization. Best checkout process?

We are using PayPal/Braintree API. What is the correct way to handle increasing order amounts (eg: delivery charges) after the original order amount has been authorized? Ideally we would like to send customers to PayPal once and then they select their preferred shipping method on our shipping page w...

P粉807397973 2024-03-30 19:45:14 0  1  538

How to send a text message via SMS containing a link to my app

I'm building a ReactNative app using Expo-managed workflows. If the user successfully invites others to sign up, I want them to get a free one-month trial of the premium version. I want the user to be able to enter their friend's phone number and then automatically send a text message to their frien...

P粉094351878 2023-09-01 22:44:43 0  1  659

I know how to cut pictures on the front end and want to learn PHP website development. I would like to ask for a complete class video of the physical class of a first-line PHP institution in Beijing.

I know how to cut pictures on the front end and want to learn PHP website development. I would like to ask for a complete class video of the physical class of a first-line PHP institution in Beijing. I learned front-end cutting at an institution before, and then became a cutter, but I didn’t have mu...

. 2017-08-28 14:28:41 0  1  1378

php framework seeks contributors

Development progress: Testing stage Framework definition: Open source/free [Commercialization to be determined] Framework advantages: Source code hosting, just one-click deployment to use [Later upload to pagoda one-click deployment warehouse]. The source code is automatically downloaded. According ...

*！ 2020-10-09 10:46:16 0  0  1139

The employment dilemma faced by high school students who learn PHP by themselves

I only have a high school education, and as a fresh graduate I have been doing backbreaking physical labor. Later, I felt unwilling to accept it and went to a training institution to study. However, after two-thirds of the study, I couldn't persist due to financial reasons (I was really helpless at ...

..... 2018-04-28 23:55:37 5  61  8943

My thoughts after watching Teacher Peter Zhu tp5.1

Thanks to Teacher Zhu for teaching thinkPHP5.1, and also thanks to PHP Chinese website for teaching. The most important thing is that it is free to watch! Teacher Zhu’s lecture on tp5.1 was very good, which gave me a more comprehensive and in-depth understanding of tp5.1 and greatly improved my deve...

李志鹏 2020-08-10 02:30:49 0  0  988

Ways to fix issue 2003 (HY000): Unable to connect to MySQL server 'db_mysql:3306' (111)

I recently tried to containerize my FastAPIPython server (also for replication/doubling purposes). Before, I had just a MySQL server in a Docker container and everything was fine, but when I also made my web server a service, it couldn't connect to the MySQL server, so now the application doesn't wo...

P粉178132828 2023-09-05 11:18:47 0  1  814

Experiment with sorting after query limit

So this is my first question here, please forgive me if something is wrong. I'm trying to make a sort query based on constraints. So there is a Customers table with 90 records. I want to first perform a query limited to 3 records, and then sort the results of this query by a column called ContactNam...

P粉237125700 2023-09-05 14:46:42 0  1  719

CSS Grid: Create new row when child content overflows column width

I have a two column layout based on CSS grid. When the content of the second column exceeds 1fr I want to create a new row. As it currently stands, the content simply overflows the column. One requirement of this layout is that the items in the right menu column are in one row. I achieve this with: ...

P粉212114661 2023-09-05 15:18:28 0  1  609

PHP full text search functionality using AND, OR and NOT operators

Newbie question: I'm trying to implement a full text search on a search string using php and eloquent. $searchstring="+(victimsuspect)+crime-covid";$searchresult=RssItem::whereRaw("MATCH(description)AGAINST('$searchstring'INBOOLEANMODE)")->ge

P粉076987386 2023-09-05 15:06:32 0  1  571

Shortest way to convert all PHP types to string

I'm writing a general system that I hope can one day be applied to fields like medicine (i.e. it's "scientific"). I think the best way is to represent all the data in php with strings (true will be "true", false will be "false" and so on). The reason for this is that in...

P粉369196603 2023-09-05 15:34:44 0  1  1000

How to get average of DATETIME column in MySQL while grouping by other columns

I'm creating and populating a MySQL table using the following query: SETtime_zone='+00:00';CREATETABLEtimestamp_n_datetime(idINT,timeDATETIME,avg_timeDATETIME);INSERTINTOtimestamp_n_datetime(id,time,avg_time)VALUES("1","2023-01-0310:

P粉460377540 2023-09-05 11:46:21 0  1  504

Multi-device (mobile phone) synchronization - React Native

I'm trying to create a Lightshow that will launch on all users' mobile devices at the same time (can have up to 2000-3000 users). All users will use the Internet (Wi-Fi or mobile data). In our FE we use Apollo for subscriptions and it works like a charm. But the problem is, user A can get subscribed...

P粉151466081 2023-09-05 11:58:38 0  1  695