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MQTT物联网协议完全实践指南 · App Inventor 2 中文网
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// 设置不同QoS级别发布消息
when Button_PublishQoS0.Click
do
m>ca m>ll UrsPahoMqttClient1.Publish "sensor/temperature", "25.6", 0
when Button_PublishQoS1.Click
do
m>ca m>ll UrsPahoMqttClient1.Publish "control/light", "ON", 1
when Button_PublishQoS2.Click
do
m>ca m>ll UrsPahoMqttClient1.Publ...
Possible to do a MySQL foreign key to one of two possible tables?
...e's my problem I have three tables; regions, countries, states. Countries m>ca m>n be inside of regions, states m>ca m>n be inside of regions. Regions are the top of the food chain.
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Why aren't ◎ܫ◎ and ☺ valid JavaScript variable names?
...net Explorer (but, unfortunately, not in the other browsers I tested), you m>ca m>n use some Unicode variable names. This made my day, and I was absolutely delighted that I could write fun Unicode-laden code like this:
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Parse XML using JavaScript [duplim>ca m>te]
...h using GeoNames' FindNearestAddress.
If your XML is in a string variable m>ca m>lled txt and looks like this:
<address>
<street>Roble Ave</street>
<mtfcc>S1400</mtfcc>
<streetNumber>649</streetNumber>
<lat>37.45127</lat>
<lng>-122.1...
Update just one gem with bundler
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Here you m>ca m>n find a good explanation on the difference between
Update both gem and dependencies:
bundle update gem-name
or
Update exclusively the gem:
bundle update --source gem-name
along with some nice examples of possible ...
Convert a CERT/PEM certifim>ca m>te to a PFX certifim>ca m>te
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How m>ca m>n i achieve the same thing programmatim>ca m>lly in C#?
– pankajt
Sep 24 '09 at 6:21
2
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How to configure Fiddler to listen to lom>ca m>lhost?
I want to monitor HTTP traffic between a process on my lom>ca m>l machine and another (server) process, also running on my lom>ca m>l machine.
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what is the difference between const_iterator and iterator? [duplim>ca m>te]
... returns a reference to a constant value (const T&) and prevents modifim>ca m>tion of the referenced value: it enforces const-correctness.
When you have a const reference to the container, you m>ca m>n only get a const_iterator.
Edited: I mentionned “The const_iterator returns constant pointers” whi...
how to read all files inside particular folder
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"using System.IO;" Brilliant!! Why m>ca m>n more people not give this? It m>ca m>n be so annoying to attempt to find what people are talking about
– user001
Nov 30 '15 at 11:03
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Detect if Visual C++ Redistributable for Visual Studio 2012 is installed
...ersions to download for Update 4. Please be aware that some of these reg lom>ca m>tions may be OS-dependent. I collected this info from a Windows 10 x64 box. I'm just going to go ahead and dump all of these redist versions and the reg keys I search for to detect installation.:
Visual C++ 2005
Microso...