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I encountered some difficulties when developing the WeChat applet calculator. There is an error that I can't figure out, but it seems to be the same as what is written in the video. Please give me some guidance.

I encountered some difficulties when developing the WeChat applet calculator. There is an error that I can't figure out, but it seems to be the same as what is written in the video. I would like to ask for guidance. For example, if you enter: "7+7", the result will be displayed as 14 normally, but the result will be 14. When I click the operator "+" a second time, the console displays an error! I clicked into the source and looked at the erroneous statement, but I couldn't find the error. I really can’t find the mistake. If you can provide detailed guidance, you can add qq: 1648407902. I wonder if Q&A can upload multiple pictures at one time. For the specific js file, please see what I uploaded.

2018-03-24 16:43:36

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 work. Below is the code snippet of the server database initialization connector in the application fromfastapiimportFastAPIimportmysql.connectorapp

2023-09-05 11:18:47

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 ContactName. I think this might be a nested query. Nested queries run fine in SQLServer, but don't know how to implement it in MySQL. Limit query: Select*fromcustomerslimit

2023-09-05 14:46:42

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: .right-menu{...grid-auto-flow:columndense;...} If I remove the grid-auto-flow attribute, the overflow stops. However, the items are now stacked into multiple rows, which is not what I want. I also tried converting .ri

2023-09-05 15:18:28

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

2023-09-05 15:06:32

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Application of end-to-end testing in WeChat applet development (PHP implementation)

Course Introduction：With the popularity of WeChat mini programs, more and more merchants, enterprises and individuals have begun to use WeChat mini programs to promote their products or services. In the process of mini program development, in order to ensure the quality and stability of the application, end-to-end testing is inevitable. This article will introduce how to use PHP to implement end-to-end testing in WeChat applet development. 1. What is end-to-end testing? End-to-End Testing refers to testing the complete functional process of an application, including starting the application, inputting data,

2023-06-03 comment 0 1139

WeChat applet development: Flex layout

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PHP project management in WeChat applet development

Course Introduction：WeChat Mini Program is currently a popular mobile application. With its rapid development, more and more companies have begun to develop WeChat Mini Programs. However, small program development is not a simple task and requires knowledge in multiple technical fields, including PHP project management. This article will introduce how to implement PHP project management in WeChat applet development to improve development efficiency. 1. What is PHP project management? PHP project management refers to the management of various stages and tasks in the PHP project development process.

2023-06-01 comment 0 2150

Window configuration diagram for WeChat applet development

Course Introduction：This article explains in detail the Window configuration of WeChat applet development

2017-03-14 comment 0 2619

Animation animation implementation for WeChat applet development

Course Introduction：This article mainly introduces the animation implementation of WeChat applet development

2018-07-18 comment 0 1654

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