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App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
... Queuing Telemetry Transport：消息队列遥测传输）
MQTT 发明于 1999 年，为物联网设计的轻量级协议，基于TCP协议实现。
MQTT 协议文档：https://mqtt.org/
虽然 App Inventor 有现成的 MQTT 扩展，但它们需要额外的 JavaScript 或外部...
Java Timestamp - How can I create a Timestamp with the date 23/09/2007?
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By Timestamp, I presume you mean java.sql.Timestamp. You will notice that this class has a con...
Memcached vs APC which one should I choose? [closed]
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edited May 2 '09 at 15:46
answered May 2 '09 at 15:33
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What's the false operator in C# good for?
...d &&.
For example, look at this code (from http://ayende.com/blog/1574/nhibernate-criteria-api-operator-overloading - where I found out about this trick; archived version by @BiggsTRC):
public static AbstractCriterion operator &(AbstractCriterion lhs, AbstractCriterion rhs)
{
re...
What is the Gradle artifact dependency graph command?
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The command is gradle dependencies, and its output is much improved in Gradle 1.2. (You can al...
How do I send a file as an email attachment using Linux command line?
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answered Mar 1 '12 at 21:26
rynoprynop
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How do I turn a String into a InputStreamReader in java?
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edited May 1 at 17:03
rogerdpack
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How to jump to a particular line in a huge text file?
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Capture HTML Canvas as gif/jpg/png/pdf?
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How to Create a circular progressbar in Android which rotates on it?
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