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Logstash实践: 分布式系统的日志监控 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...el和list两种。用过Redis的人知道，channel是Redis的发布/订阅通信模式，而list是Redis的队列数据结构。两者都可以用来实现系统间有序的消息异步通信。channel相比list的好处是，解除了发布者和订阅者之间的耦合。举个例子，一个Inde...
How to kill a process running on particular port in Linux?
...
This fuser 8080/tcp will print you PID of process bound on that port.
And this fuser -k 8080/tcp will kill that process.
Works on Linux only. More universal is use of lsof -i4 (or 6 for IPv6).
...
How to get the Power of some Integer in Swift language?
...))
}
// ...
// Then you can do this...
let i = 2 ^^ 3
// ... or
println("2³ = \(2 ^^ 3)") // Prints 2³ = 8
I used two carets so you can still use the XOR operator.
Update for Swift 3
In Swift 3 the "magic number" precedence is replaced by precedencegroups:
precedencegroup PowerPrecedence { h...
Binary Data in JSON String. Something better than Base64
...orts binary natively such as RabbitMQ message, ZeroMQ message, or a custom TCP or UDP socket.
– Dan H
Aug 1 '19 at 21:20
...
Android 4.1: How to check notifications are disabled for the application?
...r.android.com/reference/android/app/…
– Sune Kjærgård
Aug 1 '17 at 11:14
...
Generating random whole numbers in JavaScript in a specific range?
...to a two-complement with much smaller range than Number.MAX_SAFE_INTEGER (2³²⁻¹ vs. 2⁵³), thus you have to use it with caution!
– le_m
Jun 6 '16 at 1:49
...
Assignment inside lambda expression in Python
...1fcm and a height "
u"of %.1fcm has a volume of %.1fcm³."
% (my_radius, my_height, my_cylinder.volume)))])]],
main()])()
A cylinder with a radius of 10.0cm and a height of 20.0cm has a volume of 6283.2cm³.
A cylinder with a radius of 20.0cm and...
【持续更新】App Inventor 2 中文拓展一览 - App Inventor 2 中文网 - 清泛...
...：用于转换jpg/png/webp（以及更多）等图片格式的扩展
通信
【连接】ClientSocket 拓展：TCP/IP传输协议
【WIFI】TaifunWiFi 拓展：手机WiFi连接管理
【蓝牙】BlueToothLE 拓展：低功耗蓝牙(BLE) Iot 专题
【FTP】App Inventor 2 FTP 上传下载...
App Inventor 2 MQTT拓展入门（保姆级教程） · App Inventor 2 中文网
...TT拓展：
可以在“界面设计”的拓展属性中进行服务器通信基本设置：
也可以在“程序设计”视图中，屏幕初始化时使用代码块进行设置：
测试效果
.aia 源码下载
切换 目录 ...
App Inventor 2 MQTT拓展入门（保姆级教程） · App Inventor 2 中文网
...入MQTT拓展，可在“界面设计”的拓展属性中进行服务器通信基本设置：
也可以在“程序设计”视图中，屏幕初始化时使用代码块进行设置：
完整代码如下：
测试效果
App端测试发布消息，效果如下：
App与测试客户端...