javascript - Signal mechanism and event mechanism in Node.js ◔ ‸◔?

I found that the signal mechanism used for inter-process communication in Node.js is very similar to the event mechanism (see code example below). Is there any reason behind this? Or a design pattern? signal {code...} event {code...}

怪我咯 2017-05-16 13:43:18 0  1  608

javascript - JS garbage collection mechanism

When we assign null to a global variable to actively dereference and release memory, is this a reference counting strategy? Doesn’t it mean that JS’s garbage collection mechanism only uses mark and clear? Does the mark clearing strategy not involve dereferencing?

扔个三星炸死你 2017-07-05 11:02:09 0  2  1097

Apache domain name resolution problem?

1. Now my Alibaba Cloud server has an independent public IP 2. A *.abc.def.com is pan-resolved to my Alibaba Cloud IP. 3. Here I am doing third-level virtual domain name resolution corresponding to different folders. The problem we are encountering now is that apache is configured with many virtual ...

PHP中文网 2017-05-16 17:00:19 0  1  610

javascript - How does promise work?

{Code...} What does the task queue look like? I don’t need the results, I just want to know the running mechanism

黄舟 2017-05-19 10:30:35 0  1  697

Add timeout for CDN link loading: implement timeout mechanism in Head tag

I'm using a CDN to load some styles. For machines without configured proxy it works fine. But sometimes people may use a proxy to connect to a web page that the CDN cannot resolve, causing the page to take a long time to load or not load at all unless the user forces a refresh. Is there a way to spe...

P粉709307865 2023-09-11 17:44:04 0  1  538

Parse variables

What does the parsing variable here mean?

创可贴 2020-03-25 23:36:33 0  0  1046

javascript - Mobile terminal development H5 page cannot be implemented on iOS mobile phones. Long press to copy text. Looking for a solution?

Mobile terminal development H5 page cannot realize long press to copy text on iOS mobile phone. The answer from Baidu and Google search is that the iOS mobile phone system comes with a setting that needs to be disabled. Our requirement is to realize this function. However, when I tested on the mobil...

ringa_lee 2017-05-16 13:29:16 0  1  649

mysql - Why does the database need a lock mechanism?

Why does the database need a lock mechanism? Can you give a detailed example using code? Thank you!

曾经蜡笔没有小新 2017-05-18 10:54:59 0  3  751

Single quotes can parse \' and \

Single quotation marks can be parsed\'I found out through experiments, but I have never understood the parsing\. The experiment always shows \, ​​who can help explain it?

呵呵呵 2017-09-20 14:30:58 0  2  1556

javascript - The information received by WebSocket is binary. How to parse it?

I grabbed other people's ws information and got Blob type data. How should I parse it?

天蓬老师 2017-05-16 13:44:39 0  1  964

Problems with Python3.6 int optimization mechanism, 64-bit machines (-5 to 257)

Optimization mechanism in Python (both 2.7 and 3.5): Numbers between -5~257, if you use the first assignment method, they still belong to the same memory. But the test code I wrote on my local machine is as follows: As a result, this does not comply with the above. Then I compiled it on the Python o...

ringa_lee 2017-05-18 10:54:54 0  1  799

PHP parses json

Today I wanted to crawl through Tencent Video and saw an interface. When parsing, there was an extra $ sign in front of it. Please tell me how to solve it. json data {code...} into array {code...} output result {code...}

扔个三星炸死你 2017-06-10 09:47:41 0  3  1039

php - Does laravel have ajax verification mechanism

1. Does laravel have an ajax verification mechanism csrf_token() 2. What to do if a page has multiple forms? 3. What to do if a page loads more using ajax. If the page loads more, you also want to enable verification.

世界只因有你 2017-06-16 09:18:57 0  2  939

How to improve the parsing efficiency of python crawler?

What is currently used is to crawl in a multi-threaded manner under the windows environment, using beautifulsoup+lxml for parsing. N crawling threads->parsing queue->1 parsing thread->storage queue->1 The efficiency of the entire execution of the storage thread is stuck i...

世界只因有你 2017-06-12 09:20:36 0  3  775

thinkPHP material network analysis

I beg the great god to know how to analyze the source code of the material network. I want to support csdn.

小超 2020-08-05 10:59:36 0  0  1150