Title rewritten as: "Regular expression that works when using the u flag, but not when using the v flag"

I encountered the following console warning in this regex pattern: ^[a-zA-Z0-9+_.-]+@[a-zA-Z0-9]+\\.[a-zA- Z0-9]+$Patternattributevalue^[a-zA-Z0-9+_.-]+@[a-zA-Z0-9]+\.[a-zA-Z0-9]+$ is using the RegExpu flag Valid, but not with v flag: UncaughtSyntaxError:Invalidregularexpre

P粉684720851 2023-08-25 15:47:43 0  1  539

Rewrite the title to: How do I place my logo in the upper left corner of the header?

I'm designing a header for my college project where the logo should be in the top left corner. I tried using the float property in CSS but nothing happened. How do I move my logo to the upper left corner of the title bar? I tried many times but the code is not executed. @importurl('https://fonts.goo...

P粉595605759 2023-09-07 18:11:37 0  2  546

Why do regular expressions for global flags cause incorrect output?

What's wrong with this regex when I use global flag and case insensitive flag? Queries are user-generated input. The result should be [true,true]. varquery='FooB';varre=newRegExp(query,'gi');varresult=[];result.push(re.test('FooBar'));result.push(re.test('FooBar')); //The result will be [true,false]...

P粉282627613 2023-08-22 19:11:39 0  2  521

Python classes that inherit threads cannot end threads through flag bits

When testing the producer-consumer model, I encountered such a problem. I added a flag mark {code...} {code...} after inheriting the thread. I originally expected to use this flag to control the end of the thread. But the actual effect is that the program gets stuck in worker.join() and does not exi...

黄舟 2017-05-18 11:02:22 0  1  831

Why choose HTML5 semantic tags instead of div tags?

Why use HTML5 semantic tags such as headers, section, nav and article instead of simply using a div and setting it to your preferred css? I created a web page and used these tags, but they are no different than divs. What is their main purpose? Do they just provide appropriate label names when used,...

P粉806834059 2023-08-22 23:00:37 0  2  540

Does HTML5 allow non-empty self-closing tags?

The W3C validator (Wikipedia) does not like the use of self-closing tags (tags ending in "/>") on non-empty elements. (Empty elements are those that never contain any content.) Are they still valid in HTML5? Some examples of accepted empty elements:<br/><imgsrc=...

P粉680487967 2023-08-21 18:20:11 0  2  620

html5 - Why can browsers display undefined tags in HTML documents?

Today, when I was testing the compatibility of the <main> tag in HTML5, I had a sudden idea and changed "main" to "abcd". I thought that the browser would ignore the <abcd> style, but the result was not like this. It behaved like Exactly the same as a ...

高洛峰 2017-05-16 13:38:43 0  2  669

html5 - Is this logo made using CSS styles?

I looked at the source code of the icon for forwarding this kind of comment. It doesn’t seem to be a picture. It seems to be a style. So how is this style made?

扔个三星炸死你 2017-06-29 10:09:55 0  6  838

Looking for nginx log analysis software

I now generate about 200M nginx logs every day. Is there any good logging software that can analyze the logs and display them as icons (in the form of web version, mobile version is better), which has the following functions: {Code...} Hope Guys give your advice! ! Thanks

PHP中文网 2017-05-16 17:16:04 0  3  512

Flags with different granularity in SQL

I'd like to say that I'm still learning how to use SQL, so the questions I'm asking may be easy for some of you. So let's say I have a column called SAMPLE and a column called BATCH. Furthermore, the BATCH contains some SAMPLE, and for some reason there is a tag linked to the SAMPLE column (SAMPLE_F...

P粉824889650 2024-02-25 21:48:26 0  1  319

php - Socket accepts an http request. Where can we determine the end of the request by reading?

I want to use go to make a small http proxy tool: {code...} 1024 bytes may not be enough, there must be an end mark, right?

三叔 2017-07-03 11:40:16 0  1  1048

After logging out, it still says please do not log in again.

Why does it still say please do not log in again after I log out? The session is not cleared? Unscientific Base.php controller: <?php namespace app\admin\common;use think\Controller;use think\Session;class Base extends Controller{// The Base.php controller mainly completes three tasks: // 1 .Crea...

森 2017-10-26 12:58:29 1  8  1838

About the video tag problem in html5

In the video tag, what does x-webkit-airplay="allow" mean?

我想大声告诉你 2017-05-17 09:57:26 0  2  1017

Dockerfile CMD does not support multiple commands for mysql image

Try running the mysql5.7 image with the datadir flag and include the bash script in CMD. CMD["--datadir=/data;shdb_translations.sh"] What ends up happening is that the container runs and creates a folder called data for mysql;shdb_translations.sh. Any idea why this is happening?

P粉217784586 2024-03-30 11:20:42 0  1  449

How to get the playback duration of HTML5 audio

I have an html5 &lt;audio&gt; tag in the page, but how do I know its duration? &lt;audiocontrols=""&gt;&lt;sourcesrc="p4.2.mp3"&gt;&lt;/audio&gt;

P粉545218185 2023-08-22 21:19:42 0  1  638

How to fix margins

This is the goal poster This is my poster Can you read my code and tell me what I'm doing wrong/is there an easier way The project is to make a motivational poster website. TODO: Create a website of motivational posts. Style it however you want. Look at target images for inspiration. But it must hav...

P粉893457026 2023-09-05 12:35:23 0  1  550

Keep page elements consistent: Make sure your title or logo is consistent across pages

I've been working on my website for a while now, and over time I've continued to add many sections to my site, but I've been manually editing each page, and every time I add a new button to Redirect to a new section, while this wouldn't be difficult or take too long, I'm not sure how good this would...

P粉165823783 2023-09-08 13:36:13 0  2  506

HTML5 video M3U8 encoded with Base64

I want to add a base64 encoded M3U8 file in the Video tag of HTML5, how can I do it<!DOCTYPEhtml><htmllang="en"><head><metacharset="UTF-8"><metaname="viewport"content ="width=devic

P粉269530053 2023-09-09 23:07:18 0  1  771

How to solve the "unknown flag: --progress" error that occurs when "ddev start"?

I'm trying to launch my Drupal 9 website using ddev, but I'm getting the error: Unknown flag: --progress. When I type "ddev version" the result is as follows: item value DDEV version v1.22.0 Architecture amd64 Database ddev/ddev-dbserver-mariadb-10.4:v1.22.0 ddev-ssh-agent ddev/ddev...

P粉216807924 2023-08-06 18:12:28 0  1  652

javascript - weex When extending native components, how to locate components at the same level? Can you hide or show an adjacent component?

After tracing the android code, I found that it was impossible to obtain the class flag for positioning through DomObject. <text class="hi&gt;&lt;/text&gt;&lt;my_component&gt;&lt;/my_component&gt;If my component needs to respond to an event or gesture, I need to h...

伊谢尔伦 2017-05-18 10:49:57 0  1  416