javascript - In js, what are the usage scenarios of comma ","?

As the title states, apart from declaring variables as intervals, using commas in arrays and json, what other usage scenarios or techniques are there?

给我你的怀抱 2017-05-16 13:24:46 0  4  794

Teacher Zhu, can you explain the application scenarios of each method?

Teacher Zhu, can you explain the application scenarios of each method?

阿杜 2020-03-23 11:28:19 0  0  1080

javascript - A comparison of node and java concurrency scenarios, please help explain

Assume that a node program is installed under a single-core CPU. The program is very simple. It is an http server. When a request comes in, the result is returned with a delay of 5 seconds (it can be understood that something is done synchronously in 5 seconds). When 3 requests come in at the same t...

曾经蜡笔没有小新 2017-05-17 10:08:00 0  1  573

java - What are the specific business usage scenarios of high-performance classes such as ConcurrentHashMap?

Like the question, what are the specific business usage scenarios of high-performance classes like ConcurrentHashMap? Usually when we write code, we usually use HashMap the most, and we are used to it. However, there are other high-performance Maps in Java, and I feel that we don’t usually use them....

给我你的怀抱 2017-06-28 09:23:10 0  4  1219

ruby - 以下block例子通常会用在什么场景？

这样例子通常用在什么场景？ {代码...} {代码...}

PHP中文网 2017-04-24 15:59:24 0  1  619

golang - What are the usage scenarios of using yield to implement coroutines in php?

I saw an article about PHP using coroutines to implement cooperative multitasking, which was about implementing coroutines through PHP's yield. But the article was too long and I didn’t finish it, so I briefly read it. When will PHP coroutines be used in projects? Or is there any applicable scenario...

某草草 2017-07-03 11:40:23 0  3  1614

javascript - I encounter a scenario where the background returns jsonp format to me, but there is no need to cross domain at this time. What should I do at this time? .

I encountered a scenario where the background returned jsonp format to me, but I didn’t need to cross domain at this time. What should I do at this time? . No error reported

巴扎黑 2017-07-05 10:56:51 0  1  987

javascript - What is the difference between router.repalce and router.push in vue2.0? What are the differences in their application scenarios?

In vue2.0, the corresponding router2.0 explains that router.replace is very similar to router.push. The only difference is that router.replace does not add new records to history, but replaces the current history record. So what are the differences between the two application scenarios?

ringa_lee 2017-06-26 10:54:01 0  2  918

javascript - Multiple pages share the same navigation. How can this shared navigation be introduced to avoid duplication?

A very common scenario was introduced using PHP's include in the past. What methods can be used at the front end to do this? The libraries currently introduced include jQuery and Webpack. The ones that come to mind are: Send an Ajax request and put the requested page into the container: {code...} Ma...

PHPz 2017-05-19 10:37:36 0  2  872

html5 - What is the idea of ​​​​implementing micro-scenarios in H5? How to set up the environment? Please help me to guide you. If there are any good courses, I would like to recommend them.

Now the company is going to create a micro-scenario. I hope it will be interesting. I have never done it before and I don’t know how to implement it. Is there any framework and what is the idea? I would like to recommend some good courses or articles. Thank you, masters.

仅有的幸福 2017-06-08 11:03:18 0  1  737

Resetting the visibility of "startButtonGame" is the only problem; everything else works fine

I'm developing a blackjack game. So far, everything is working fine except this small detail. Basically, the start game button should only be visible before the game and after the game. I have no problem setting it to hidden, but when I finish a game it doesn't work. functionstartGame(){startGameBut...

P粉614840363 2023-09-19 22:02:31 0  1  740

What is Hadoop used for, what are its main application scenarios and fields, and what are its core problems to be solved? How can we personally

What is Hadoop used for? What are its main application scenarios and application fields? What are the core problems it mainly solves? What can we personally use it to do to generate value?

人工智能君 2020-09-24 16:31:30 0  1  1589

Error: Required module that throws exception: Invariant violation: 'background' 'background' is not a valid style attribute

I'm implementing ZEGCLOUD one to one voice calling. I encountered this error. Error: Requires module 'node_modules@zegocloud\zego-uikit-prebuilt-call-rn\lib\commonjs\index.js', throwing exception: Invariant violation: 'background' is not a valid style attribute. CallScreen code. What am I doing wron...

P粉245489391 2024-02-17 16:25:47 0  1  454

Gmail background color not working properly in HTML mail

August 2023 - Does anyone have a simple example of creating a background color with the entire message body that works in Gmail? I've looked everywhere and as of August 2023, not a single code example works in Gmail. Hopefully someone can share a small snippet from to, valid in Gmail as of August 20...

P粉344355715 2023-08-16 14:55:54 0  1  440

javascript - [MUI sub-webview positioning]

In the app project, index.html introduces a sub-webview, which needs to be positioned (as shown below): [Figure 1] Actual real-machine debugging: [Figure 2] It can be seen that it reaches the top and the original code is as follows: {code...} After code modification: {Code...} If anyone has dealt wi...

给我你的怀抱 2017-06-30 09:57:19 0  1  824

How to use echarts-gl in react???

npm installs echarts and echarts-gl but it has no effect? ? ? The background and other things have been introduced, but the earth has no corresponding effect. For normal effects, see http://gallery.echartsjs.com/...The code is as follows

巴扎黑 2017-06-12 09:29:05 0  1  968

Other application scenarios

Then use websocket to synchronize rabbitmq messages to the front end in real time. How to implement it? Can you explain it?

吖金啊！ 2019-05-30 17:14:57 0  0  1307

javascript - How can the data not be displayed cumulatively after clicking the button continuously?

I encountered a problem recently when I was working on a web page. There were multiple products displayed in the scene graph of a page. Every time I clicked on a product, the information list corresponding to the product was displayed under the scene graph. The problem I'm encountering now is: when ...

typecho 2017-06-12 09:25:16 0  2  835