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How can $a not change with the color of the number?

I’m new to this and don’t understand. I just started learning.

PLUTO 2019-07-21 16:42:49

What is the difference between left and margin-left in this?

What is the difference between left: 20px; and margin-left: 20px;

人事易分° 2018-07-04 14:09:38

Hello everyone, I am new to the industry and hope to learn more.

Hello everyone, Gangru has been in the industry for a long time, and I hope to learn a lot. Hello everyone, Gangru has not been long in the industry, and I hope to learn a lot.

黄雪楠 sharon 2019-11-22 12:43:47

How to make inquiry about educational affairs in mini program?

Is there a demo? How to configure the backend interface?

phpcn_u210072 2018-05-24 08:21:48

Are parameters passed in JavaScript by value or by reference?

Primitive types (numbers, strings, etc.) are passed by value, but objects are unknown since they can either be passed by value (in which case we think the variable holding the object is actually a reference to the object), It is also possible to pass by reference (in which case we consider the varia...

P粉394812277 2023-08-21 15:57:16

Driver not found - "An exception occurred in driver: could not find driver" in Symfony 5

I'm currently facing this issue. I'm a real newbie when it comes to Symfony. Problem: When I create a new database using cli symfonyconsoledoctrine:database:create, I get the following error: InAbstractPostgreSQLDriver.phpline102:Anexceptionoccurredindriver:couldnotfinddriverInException.phplin

P粉651109397 2023-08-22 20:59:57

I always feel that asp.net MVC is awkward to write. Compared with PHP's mvc, asp.net is a lot more troublesome?

Anyone feel the same way? How to write mvc? I find it very difficult to write. PHP: {Code...} asp.net does not have an array as flexible as PHP. The data exchange between m-v-c is passed through the array. Asp.net can't have a hashtable, right? It seems that the tutorials all write entity classes.

漂亮男人 2017-05-16 17:06:17

Vue.js vs. Nuxt.js: Discover what you have in common when coding

I'm new to coding and currently learning Nuxtjs, I've been watching some tutorials on Nuxtjs and some of the functions are really hard to understand. I just want to ask, are there any similarities between Vuejs and Nuxtjs when it comes to coding? If not, can I use VueJS's coding structure within the...

P粉143640496 2023-09-07 09:40:51

Laravel public folder returns 404 error (.htaccess)

I have a .htaccess file. Through this file I can detect the language by subdomain. There is no problem in this regard. However, when I redirect the incoming request to a file under the public folder, I get a 404 error and the language doesn't work. SetEnv DEFAULT_LANG en Options +FollowSymLinks ...

P粉238433862 2023-07-28 18:04:13

add jpg image from mysql to html

As a preface, I'm very new to this so this might be a stupid question, but... I'm trying to design a website that pulls from a database where I store product information for a "store" . This is my code so far. session_start();include("connections.php");$con=mysqli_connect($server...

P粉511757848 2024-04-02 13:27:34

nginx configures gzip to compress css but not compress js

The nginx I use is 1.6. gzip is written in the configuration file. See {code...} but I used the online testing tool http://gtmetrix.com/ to test. Only the css was compressed and the js was not compressed (the same is true for the domestic webkaka speed test). How strange. I asked a lot of people, bu...

大家讲道理 2017-05-16 17:27:04

javascript - After the form is submitted, the background returns directly to the page. How should I handle it?

In the project, after an ajax request is sent, a page is returned directly from the background instead of returning a status value. The page returned may be the page entered after successful submission, or it may be an error page, or a page with abnormal status. Originally, the prompt window in this...

代言 2017-07-05 10:48:44

SSL Provider Error: Certificate chain issued to MSSQL Server by an untrusted authority in PHP

First of all, I'm really new to this. (sorry) Secondly, I tried to connect php to mssql server. Third, I have installed sqlsrv, pdo_sqlsrv and msodbcsql.msi but still get the error message when trying to connect. My php version is 8.0.10, x64; mssql server 2012. My php code for testing the connectio...

P粉338969567 2023-10-30 18:03:00

javascript - How is the size determined during react-native layout?

I saw that the official website only says that the unit is not used, but the logical pixel unit is used. So for example, width: 20; How to determine the 20 here? When I was making a small program before, the documentation of the small program stated that it was done using the 750 design drawings, bu...

过去多啦不再A梦 2017-05-31 10:37:13

Vue 3: v-for shows more components than items

I'm new to Vue and trying it out. I'm still using Ionic and new to this too. I have my own component that I want to display for each trip instance obtained from the API: Woadie-Trips. From what I understand from the documentation, I can now use onMounted to set my data: import { IonContent, IonHeade...

P粉245276769 2023-07-28 17:56:59

Bring rows in a database table that have data in all columns to the front

In MySQL5.7 I have a column with 28 columns and 4000 rows. I want to get all the rows that have data first or get the rows with the most columns of data first and then gradually get the data of other rows. How can I implement this? For example: Table: Studentnameageaddresstan10gib10californiahalpur1...

P粉504080992 2023-08-18 15:48:44

CSS and HTML methods for moving paragraphs to the left on mobile sized screens

It looks perfect on a normal 16:9 computer screen, with text on the left and images on the right. However, when it comes to smaller screens (e.g. phone size screens), it does display the picture on top of the paragraph like I want it to. I'm very new to this so please help. This is my media file @me...

P粉043470158 2024-04-04 20:25:22