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【Mixly×AI2系列·第5讲】手机发指令控制LED/舵机：蓝牙双向通信实战① - ...
...；btnOFF → 灭
5. 拖动滑块 → 舵机跟随转动
七、常见问题
• 连接失败 → 未在系统蓝牙中配对，先配对再进 App
• 上传程序失败 → HC-05 占用串口，上传时拔掉 TX/RX
• 指令无反应 → 波特率不一致，确认双方都是 9600
• iP...
do you have kcachegrind like profiling tools for mac [closed]
...qcachegrind (brew install qcachegrind)
XHProf: A Hierarchical Profiler for PHP (pecl install xhprof)
MCG premium app can analyse your application profile data natively on your Mac (released to the Mac App Store at $27)
Profiling Viewer, available on App Store at $25
Older: MacCallGrind (semi-commer...
Regex to get string between curly braces
... based on the language you work in. Javascript takes the index to stop at, PHP takes the length of the desired end result (unless it's negative, in which case it takes the number of characters to remove), C# is different again...nice and confusing.
– jvenema
Ja...
Tools for JPEG optimization? [closed]
... that may help you:
http://www.imagemagick.org/script/command-line-options.php#strip
Grasping the Node JS alternative to multithreading
...ache is mentioned in the first place. Additionally, the very commonly used PHP module is multithreaded all by its own. And finally, while I'm not an apache expert, my impression from other articles is that the worker MPM is in fact very commonly used.
– Michael Borgwardt
...
PDO's query vs execute
...ause I was bulk transferring trusted data from an Ubuntu Linux box running PHP7 with the poorly supported Microsoft ODBC driver for MS SQL Server.
I arrived at this question because I had a long running script for an ETL that I was trying to squeeze for speed. It seemed intuitive to me that query c...
How do I get the type of a variable?
...
I totally disagree. Java, C#, PHP, Perl, Python and so on were designed in C and C++ and they are not caterpillars. (When you create an database application to open variable tables from 'unknown' databases you need to control field type to variable scheme...
How to display request headers with command line curl
...Apache
Set-Cookie: UID=b8c37e33defde51cf91e1e03e51657da
Location: noaccess.php
Content-Type: text/html
HTTP/1.1 200 OK
Date: Sat, 29 Dec 2012 15:22:13 GMT
Server: Apache
Content-Type: text/html
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...
Heroku push rejected, no Cedar-supported app detected
... missing some key file that it uses to identify your app (and its type).
php: index.php
python: requirements.txt
ruby: Gemfile # note the capitalization
node: package.json
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improve this a...
What is the difference between native code, machine code and assembly code?
...ictly speaking, most dynamically-typed languages — such as Perl, Python, PHP and Ruby — are also managed code. However, they are not commonly described as such, which shows that managed code is actually somewhat of a marketing term for the really big, serious, commercial programming environments...