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MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...ll UrsPahoMqttClient1.Publish Topic, jsonEncode Message, qos
// 记录操作日志
call logControlOperation device, action
// 手动控制按钮事件
when Button_WaterPumpManual.Click
do
if Button_WaterPumpManual.Text = "开启水泵" then
call publishControlCommand "water_pum...
deny direct access to a folder and file by htaccess
...*">
Deny from all
</Files>
<Files ~ "^index\.php|css|js|.*\.png|.*\.jpg|.*\.gif">
Allow from all
</Files>
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How to implement history.back() in angular.js
...="back" ng-class="icons">
<img src="../media/icons/right_circular.png" onClick="javascript:history.go(-1);" />
</a>
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Lua简明教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...
不多说了，直接看代码吧（注意：Lua没有++或是+=这样的操作）
while循环
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sum = 0
num = 1
while num <= 100 do
sum = sum + num
num = num + 1
end
print("sum =",sum)
if-else分支
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C# Xml中SelectSingleNode方法中的xpath用法（Xml节点操作最佳方式） - 更...
C# Xml中SelectSingleNode方法中的xpath用法（Xml节点操作最佳方式）Xml_SelectSingleNode_XpathXPath 是一门在 XML 文档中查找信息的语言，可用来在 XML 文档中对元素和属性进行遍历。因此使用xpath进行XML节点操作为我们省去了很多逻辑，代码...
Take a screenshot of a webpage with JavaScript?
...o:
exec("CreateScreenShot.exe -url http://.... -save C:/shots domain_page.png");
Then you have the screenshot in the server side.
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req.body empty on posts
...postman you have to send the data as raw.
https://i.stack.imgur.com/k9IdQ.png postman screenshot
If you have set,
app.use(bodyParser.urlencoded({
extended: true
}));
then 'x-www-form-urlencoded' option should be selected.
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CruiseControl.Net 进行持续化集成 - IT产品资讯 - 清泛网 - 专注C/C++及内核技术
...下是用本地系统账户运行的，可一般情况下我们会在当前操作用户下设置对vss共享目录的访问权限，比如当前windows运行账户为administrator，那么我们在administrator中通过net use设置对\\192.168.1.200\vss\的访问，也可以通过Source Safe Client...
How to change plot background color?
...s.Line2D object at 0x2827e50>]
>>> canvas.print_figure('red-bg.png')
(Granted, not a scatter plot, and not a black background.)
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How to access a mobile's camera from a web app?
...work on desktop too: w3.org/TR/html-media-capture/images/file-upload-state.png
– viam0Zah
Sep 21 at 14:14
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