python - How to get download speed elegantly?

I used to use urlopen and then read, open a thread, and detect the received buffer size every second. Is there a more elegant way to gain speed?

天蓬老师 2017-05-18 10:44:51 0  5  753

php - How to implement multi-table query in Laravel

I have a view that displays a shopping cart in tabular form. Each shopping cart entry needs to display the details of the flowers currently purchased and the quantity purchased. In the database, there are two tables, flower and cart. The former contains the basic information of the flowers. Informat...

大家讲道理 2017-05-18 10:47:22 0  1  1023

PHP array How to elegantly convert 1,2,4,5,6,7,9,11 into a string like '1,2,4-7,9,11'?

For example, if there is a php array {code...} that can be elegantly converted into a string like {code...}? Thank you for your answer.

过去多啦不再A梦 2017-06-05 11:07:46 0  2  642

How to call python2 from python3 program?

I need to call an independent module written in python2 (pass some parameters) in a program written in python3. Is there a more elegant way besides using subprocess?

PHP中文网 2017-06-22 11:52:14 0  3  965

Center dropdown menu in navigation bar

I made this CSS/HTML. .navbar{width:100%;background-color:rgb(151,44,44);overflow:auto;}.navbara{border-right:1pxsolid#f5b7b7;float:left;padding:8px;color:white;text -decoration:none;font-size:1.5vh;width:25%

P粉285587590 2024-04-04 18:24:52 0  1  475

javascript - Questions about decorators in "Introduction to ES6 Standards"

Modifiers change the behavior of a class when the code is compiled, not at runtime. This means that decorators can run code during compilation. In other words, the decorator is essentially a function that is executed at compile time. There are several questions: As mentioned in the above quote: Modi...

仅有的幸福 2017-06-30 09:58:40 0  2  815

html5 - How to write the petal scattering effect and how to generate many petals

{Code...} I am writing one by one. It is very frustrating and there cannot be many petals. How can many petals be generated infinitely when there are only a few? Can it be achieved without canvas? Or how can it be achieved with canvas?

我想大声告诉你 2017-06-22 11:53:27 0  3  2060

python - Please tell me how to crawl Jianshu to post in a certain period of time.

I want to crawl Jianshu's posts in a certain period of time, such as April 13, 2013 - May 13, 2013. The idea I want to try is as follows: Baidu uses Baidu's site syntax to limit the date. Observe that there are about 70 posts. Google google's site Syntax-qualified date observations have approximatel...

黄舟 2017-05-18 10:55:49 0  1  719

javascript - How to use redux to manage user refresh on WeChat official account webpage?

The HTML page of the WeChat official account uses redux to save data, but if the page is refreshed, the saved data will inevitably be cleared. So the question is, how to save this data? How to save this data elegantly? Can the refreshed interface still retain its state?

仅有的幸福 2017-06-26 10:53:53 0  1  926

How to use pop-up plugin elegantly in laravel

How to use pop-up plug-ins elegantly in laravel. I have been working on a back-end management system recently. Many places want to use pop-up plug-ins similar to artDialog, but I don’t know how to cooperate with the back-end to complete it? When using the TP framework in the past, you could output t...

天蓬老师 2017-05-16 16:52:18 0  1  555

vue 2.0 @click.self does not trigger - Stack Overflow

Why does vue 2.0 use @click.self to bind its own event but it does not trigger? Scenario: Mobile terminal development, click on the mask layer to close the pop-up window, but the div box on the mask layer cannot be triggered, that is, the parent is triggered, and the event will not be passed to the ...

代言 2017-07-05 10:45:02 0  3  1159

Asynchronous Programming - How to elegantly solve the problem of interaction between Nginx and back-end third-party services?

For example, if you want to develop an nginx module to handle API, each API call process needs to interact with another back-end API server (not an HTTP server) several times, and the subsequent behavior will be determined based on the results of the interaction. So how to use it elegantly? How to h...

滿天的星座 2017-05-16 17:23:15 0  1  549

Accessibility: alt or alt="" for decorating images

As far as WCAG2.0 accessibility is concerned, if I write alt or alt="" in html, are empty alt tags equally valid? Like this: <imgsrc="some-image.jpg"alt=""><imgsrc="some-image.jpg"alt>Are they both valid for describing decorative images? Use alt=&a...

P粉364129744 2024-02-03 21:18:47 0  2  415

How to achieve arc-shaped motion trajectory in css3

Because I want to make the petals fall realistically, I just added a breakpoint at the middle point, but the movement is very stiff. How can I use css3 keyfames to make that arc-shaped movement trajectory? Thank you very much for your help.

扔个三星炸死你 2017-07-01 09:12:22 0  3  2107

Is there any elegant way to handle refreshed/loaded data of the same interface?

Please tell me about your request for list data, pull-down refresh and pull-up loading requests in the same interface. So what is a more appropriate way to process the data when getting the request result? My current approach is to pass the data into the same function, and then judge this request in...

PHP中文网 2017-05-16 13:31:18 0  2  598

The 'KeyboardEvent.keyCode' modifier 'v-on' directive is deprecated. Use "KeyboardEvent.key" instead of view

I'm migrating my application vue2 to vue3. I'm getting some deprecation errors when running the application. In my keyboard event modifier I use numbers and keys for keyboard events. However, this concept is deprecated, so I'm getting errors. I don't know how to use it now? Previously I was getting ...

P粉348088995 2024-03-19 17:57:43 0  1  342

javascript - Use H5 technology to implement a barcode similar to WeChat, Alipay, and click full screen and automatically switch to landscape mode?

As title. I developed an APP using H5+. Clicking on the QR code has been implemented. How to better achieve the effect of clicking on the barcode to enlarge and horizontal screen is similar to the payment interface of Alipay and WeChat? Figure 3. I didn't do it well. I beg you all to provide elegant...

扔个三星炸死你 2017-06-14 10:50:51 0  3  1239

Unable to update content in useEffect and render

I'm trying to make a web app that will fire off a bunch of fireworks once a button is pressed. It's using React and I'm trying to use the useEffect hook to fire off fireworks after the ID variable is updated. When it starts rendering it works fine and fires the fireworks the way I want, but the rest...

P粉164942791 2023-08-14 10:16:04 0  1  587

VueJS: "once" event modifier, check if clicked

I have a simple question that I haven't answered so far. In VueJS, there is .once event modifier, which works fine. The problem is that I'm using @click.once on the autocomplete input component to query my database and populate its available items. What I want to achieve is to provide some kind of a...

P粉541551230 2024-02-25 15:18:09 0  1  441

javascript - js Is there any elegant way to communicate between two tabs that are open at the same time?

Here is an example: I opened two pages a and b at the same time. I focused on a and performed some operations, letting the js on page a process my operations and send the data to page b next to it. At this time, page b can receive these data and give feedback without refreshing or going through the ...

黄舟 2017-05-16 13:39:46 0  4  702