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APP INVENTOR硬件交互学习教程02——资源介绍 - 创客硬件开发 - 清泛IT社区...
1.主控使用创客常用的arduino nano，程序下载方便，扩展库很多。
2.板子集成3路独立LED，可以单独控制
3.板子集成RGB LED，可以单独控制
4.一路可调电位计，可以进行AD实验
5.板子集成红外发射和接收，方便进行红外...
【解决】模拟器启动失败：ERROR: x86_64 emulation currently requires har...
...-Android-SDK\extras\intel\Hardware_Accelerated_Execution_Manager
在线版下载后的目录是：Emulator\from-Android-SDK\extras\intel\Hardware_Accelerated_Execution_Manager
安装：haxm-7.6.5-setup.exe
如果报错，请参考：https://bbs.tsingfun.com/thread-2030-1-1.html
求助！关于拓展模块NotificationStyle的demo运行时报错的问题 - App Invent...
...版本的aix拓展，或者最新的demo再试。
拓展文档页面进行下载：https://www.fun123.cn/reference/extensions/NotificationStyle.html
How to tell which version of a gem a rails app is using
... versions of your gems to a file for viewing with:
gem list > all_gems.txt
and you can see what versions your Rails app is using with:
bundle show > project_gems.txt
Using an editor like Vim you can easily use vimdiff to see the changes
...
encryption/decryption with multiple keys
... multi-key encryption in standard.
The following command will encrypt doc.txt using the public key for Alice and the public key for Bob. Alice can decrypt using her private key. Bob can also decrypt using his private key.
gpg --encrypt --recipient alice@example.com \
--recipient bob@example.co...
Deleting all files from a folder using PHP?
... Although it's obvious, I'd mention that, for example, 'path/to/temp/*.txt' will remove only txt files and so on.
– Tertium
Mar 31 '15 at 17:44
...
How to post pictures to instagram using API
...
if($cookies) {
curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookies.txt');
} else {
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookies.txt');
}
$response = curl_exec($ch);
$http = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
return array($http...
Confused about stdin, stdout and stderr?
...ead of coming from keyboard input, it can come from a file (echo < file.txt ), or another program ( ps | grep <userid>).
The destinations for stdout, stderr can also be redirected. For example stdout can be redirected to a file: ls . > ls-output.txt, in this case the output is writte...
Test method is inconclusive: Test wasn't run. Error?
...17, Run the command:
devenv /ReSharper.LogFile C:\temp\log\test_log.txt /ReSharper.LogLevel Verbose
Run the test.
Review the log file test_log.txt and search for 'error' in the file.
The log file is a great help to find the error that you can resolve or you can send the issue with the lo...
Repeat command automatically in Linux
...mmand needs to be padded with quotes. For example, to repeat ls -l | grep "txt", the watch command should be:
watch -n 5 'ls -l | grep "txt"'
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