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大佬们，串口输出的文本字符怎么不能比较，也不能转换数字类型？ - App应用...
...能转换数字类型？你好，App Inventor 2 是弱语言类型，文本和数字之间不用刻意去转换，之间赋值就可以了：https://www.fun123.cn/reference/blocks/text.html#text2num
再次经过测试，你上面的步骤都能正常测试通过，方便的话，能否附上aia...
APP INVENTOR硬件交互学习教程11——滑条控制舵机 - 创客硬件开发 - 清泛IT...
这节我们通过滑条控件控制舵机动作。
1.界面设计
增加滑条控件和标签控件，滑条控制舵机动作，标签显示滑条数值。
2.逻辑设计
增加当滑条改变时，显示和发送指令给下位机
3.工程参考
【生成Python】AppInventor2中文网已支持代码块转换Python源码！ - App Inv...
...前瞻性。
咱作为“技术流派”，这么先进的设计理念和实用的功能，咱可不能忽视它，加之最近还有用户问AppInventor能否转Python代码，这不，这个功能不就来了嘛~~
先来个具体的例子，看看效果，写了一个生成3位水仙花数...
Git SSH error: “Connect to host: Bad file number”
...27.239)
Host is up (0.10s latency).
PORT STATE SERVICE
22/tcp ***filtered*** ssh
Nmap done: 1 IP address (1 host up) scanned in 2.63 seconds
As you can see the state is Filtered, which means something is blocking it.
You can solve this by performing an SSH to port 443 (your f...
Application Loader stuck at “Authenticating with the iTunes store” when uploading an iOS app
...kes 15-20 minutes and successfully uploaded to AppStore. But please enable TCP port 443 access.
– Kirti Nikam
Jan 5 '15 at 6:19
...
How do you serve a file for download with AngularJS or Javascript?
...wnload using following code.
in html
<a class="btn" ng-click="saveJSON()" ng-href="{{ url }}">Export to JSON</a>
In controller
$scope.saveJSON = function () {
$scope.toJSON = '';
$scope.toJSON = angular.toJson($scope.data);
var blob = new Blob([$scope.toJSON...
How do I render a partial of a different format in Rails?
I'm trying to generate a JSON response that includes some HTML. Thus, I have /app/views/foo/bar.json.erb :
11 Answers
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What is the difference between RegExp’s exec() function and String’s match() function?
...the g flag
And .match() without the g flag is equivalent to .exec():
e1=JSON.stringify(str.match(/nop/))===JSON.stringify(/nop/.exec(str)); //true
//e2 ... e4 //true
e5=JSON.stringify(str.match(/(ab)a/))===JSON.stringify(/(ab)a/.exec(str)); //true
The .exec() function regexp.exec(str) will do...
XMLHttpRequest Origin null is not allowed Access-Control-Allow-Origin for file:/// to file:/// (Serv
...s to be an open issue (as of Jan 2011).
See also: Problems with jQuery getJSON using local files in Chrome
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What character encoding should I use for a HTTP header?
...ecial chars like ✰ (Which is not ASCII)
Tip: you can encode anything in JSON.
Edit: may not be obvious at first, the character encoding defined in the header only applies for the response body, not for the header itself. (As it would cause a chicken-&-egg problem.)
I'd like to sum up all ...