javascript - Questions about ajax asynchronous

Async defaults to true, which is an asynchronous mode. After $.Ajax is executed, the script behind ajax will continue to be executed until the server returns data, and the success method in $.Ajax is triggered. At this time, two threads are executed. If you set it to false, all requests are synchron...

typecho 2017-07-05 10:52:26 0  4  1024

What exactly is the difference between synchronous/asynchronous and blocking/non-blocking?

As far as I understand, synchronization/blocking are the same concept. The client is waiting for a receipt from the server. If the server does not return a receipt, the client will not proceed; asynchronous/non-blocking means that the client does not wait for a receipt from the server. Go straight d...

怪我咯 2017-05-17 10:08:42 0  4  932

javascript - Doubts about redux asynchronous

React can handle asynchronous ajax requests in hooks. Why do we need to use middleware in redux to handle them? Is there any difference between the 2?

黄舟 2017-05-19 10:36:40 0  1  623

javascript - A problem encountered when nodejs implements asynchronous implementation

For example, there are three functions a, b, and c, all of which perform synchronous operations. To simplify, I have simplified the synchronization operations {code...} When a() is executed, the output is 2. But if function c executes a non-synchronous function, It is an asynchronous operation such ...

黄舟 2017-07-03 11:41:44 0  6  883

javascript - webpack-dev-server cannot refresh the browser synchronously when changing css. Is there any way to refresh it synchronously?

The configuration of webpack.config.js is as follows. Updating css cannot refresh the browser synchronously, but updating js can refresh the browser synchronously.

黄舟 2017-05-19 10:20:41 0  2  534

synchronous and async in js

Is it possible to have a program that is only asynchronous? What problems will occur with such a program?

过去多啦不再A梦 2017-05-19 10:26:25 0  1  427

php - Synchronize data between two tables

Table A and Table B (Table B wants to synchronize the data in Table A. The account field in Table A is the same as the account field in Table B. The condition for synchronization is that when the account field exists in Table A but not in Table B, then The account field in table A needs to be taken ...

天蓬老师 2017-07-03 11:40:18 0  1  875

React: sync with local storage

Have a React application. Certain components will set different data values ​​to local storage using the same key over a period of time. I need to subscribe to several components of this project in local storage. Whenever a value with a specific key is updated in local storage, subscribed components...

P粉214176639 2024-02-03 23:49:55 0  1  550

javascript - About node synchronization and asynchronousness

This is from the book "Introduction to NodeJS". Why is it said that asynchronous time-consuming depends on the slowest file? Even if it is asynchronous, isn't it also single-threaded? It needs to complete one task before executing the next one. Doesn't it depend on the slowest file? Isn't ...

巴扎黑 2017-05-31 10:39:42 0  5  767

Sync by PivotTable ID instead of Model ID

I want to update order products by pivot id using sync method because in my scenario an order can have multiple products with the same id and I want to update the product whose pivot id I am calling and delete other products which I have not updated , but you know from the sync syntax that it accept...

P粉121447292 2024-02-17 15:02:30 0  1  476

How to solve the problem of mysql master-master synchronization and slave database out-of-synchronization?

There are now 3 mysql instances mysql-m1 mysql-s1 mysql-m2 mysql-m1 and mysql-s1 have a master-slave relationship. All operations in mysql-m1 will be synchronized to mysql-s1, and then I configured another mysql-m2. As the master-master relationship with mysql-m1, inserting data in mysql-m2 will be ...

ringa_lee 2017-05-24 11:33:07 0  2  761

nginx - How to understand the asynchronous non-blocking high-performance web server advertised by openresty?

I understand asynchronous and synchronous, whether it is blocking or not, but I just don’t understand how openresty implements asynchronous non-blocking IO and achieves high concurrency processing capabilities? I usually write Lua interfaces, but I can see considerable QPS when doing stress tests, b...

仅有的幸福 2017-05-16 17:10:59 0  1  836

javascript - What does it mean to write asynchronously in synchronous way?

Isn’t synchronization just synchronization, and isn’t asynchronous just asynchronous? What does it mean to write asynchronously in a synchronous way?

天蓬老师 2017-07-05 10:52:36 0  4  1124

Is console.log() asynchronous or synchronous?

I'm currently reading "AsyncJavascript" by Trevor Burnham. This is a great book so far. He talks about this code snippet and console.log being "asynchronous" in Safari and Chrome consoles. Unfortunately I can't replicate this. This is the code: varobj={};console.log(obj);obj.foo=...

P粉248602298 2023-08-27 22:31:53 0  2  543

Asynchronous requests - Is there a way in php to do asynchronous posts similar to js? fsockopen has no way to get the request result

When sending emails in batches, you need to obtain the sending results, so you need to wait for the request results. Is there a way for PHP to request the interface asynchronously, then obtain the data, and then execute the callback function? Now it is a synchronous request interface, and then wait,...

过去多啦不再A梦 2017-05-27 17:42:08 0  5  782

When synchronized lock code block in Java, does this class need to be a singleton?

When it locks a method or a block of code, at most one thread can execute this code at the same time. When two concurrent threads access this locked synchronization code block in the same object object, only one thread can be executed at a time. Another thread must wait for the current thread...

高洛峰 2017-06-28 09:22:12 0  2  959

javascript - understanding of asynchronous modules

For synchronous modules, the module must be loaded into memory in advance. For asynchronous modules, for example, its implementation of requirejs relies on front-end and is executed in advance. Isn't this also loaded into memory in advance? So why is it said to be asynchronous? I read a lot about AM...

曾经蜡笔没有小新 2017-07-05 10:49:39 0  2  1029

File Server - How to implement file synchronization between Python servers?

How to use Python to copy files, for example, generate a configuration file through the WEB interface, then compare this file with the file on the remote server, and then synchronize it. What module is more suitable for this? And if it is a directory, what should I use? Implement a function similar ...

ringa_lee 2017-05-18 10:59:16 0  1  735

Why does the click() method of html run synchronously?

I found that MDN said dispatchEvent() runs synchronously when introducing dispatchEvent(), but I didn't find any official documentation like MDN or HTMLStandard mentioning that the htmlclick() method runs synchronously or that the synthetic event runs synchronously. Can someone share the relevant fi...

P粉170438285 2024-03-19 23:15:17 0  1  445

javascript - Can the upload plug-in pluploader upload asynchronously?

I need to be able to upload hundreds of pictures at the same time. I found that plupload is synchronous and the efficiency is very low. Is my opening method wrong?

为情所困 2017-07-05 10:59:21 0  1  1249