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开源MQTT网关：EMQX vs Mosquitto - 创客硬件开发 - 清泛IT社区，为创新赋能！
... EMQX 5.0 可在 23 个节点的单集群中建立 1 亿个并发的 MQTT 连接。优点：支持大规模部署高可用性横向可扩展性高性能和高可靠丰富的企业功能率先采用 MQTT over QUIC
缺点：上手复杂难以有效管理
社区情况EMQX 是 GitHub 上评价最高...
Circular list iterator in Python
...ions!
– Jacob Krall
May 1 '14 at 21:05
5
pool.next() didn't work for me, only next(pool). Probabl...
MFC的DDX和DDV技巧 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的DDX和DDV技巧DDX将数据成员变量同对话类模板内的控件相连接，这么就使得数据在控件之间很轻率地传输。DDV用于数据的校验，例如它能积极校验数据成员变量...DDX将数据成员变量同对话类模板内的控件相连接，这么就使得数据...
Iterating over each line of ls -l output
...
find is broken. Ioften get some bizarro error messages. it wants to give me help when the commandline is perfectly valid, and it seems like once it starts doing this, it won't stop until next reboot MAYBE. it sometimes seems random in nature concerning errors. not ...
Format date and time in a Windows batch script
...:: Check WMIC is available
WMIC.EXE Alias /? >NUL 2>&1 || GOTO s_error
:: Use WMIC to retrieve date and time
FOR /F "skip=1 tokens=1-6" %%G IN ('WMIC Path Win32_LocalTime Get Day^,Hour^,Minute^,Month^,Second^,Year /Format:table') DO (
IF "%%~L"=="" goto s_done
Set _yyyy=%%L
...
Downloading Java JDK on Linux via wget is shown license page instead
...
got the ERROR 404: Not Found with JDK 11, may be incorrect URL?
– Tien Dung Tran
Dec 19 '19 at 3:19
4
...
Do I need dependency injection in NodeJS, or how to deal with …?
...ontrived example.
MyClass.js:
var fs = require('fs');
MyClass.prototype.errorFileExists = function(dir) {
var dirsOrFiles = fs.readdirSync(dir);
for (var d in dirsOrFiles) {
if (d === 'error.txt') return true;
}
return false;
};
MyClass.test.js:
describe('MyClass', func...
How do you use vim's quickfix feature?
...p (at least for me). I just installed this vim script for JavaScriptLint error checking, which shows errors in vim's quickfix window once I save a buffer.
...
What is the maximum recursion depth in Python, and how to increase it?
...unt is useful if your program is entering recursion and you would like the error message to NOT be pages and pages of the same text. I found this very helpful while debugging (my) bad recursive code.
– peawormsworth
Feb 22 at 0:38
...
What is the native keyword in Java for?
...ction with an incorrect signature called with a mess on the stack, with no error reported (at any of compile, link or run times). Thus I find it important to mention to be careful on this step.
– SR_
Mar 19 '18 at 13:04
...