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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网
...端的串口工具软件非常之多，这里提供一款仅供参考：
XCOM V2.7.zip
请注意：使用串口工具软件之前，一般需要安装硬件厂商提供的驱动程序。
电脑端打开串口：
UART上指示灯会开启，说明串口已打开：
测试与BLE...
Attach to a processes output for viewing
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There are a few options here. One is to redirect the output of the command to a file, and then use 'tail' to view new lines that are added to that file in real time.
Another option is to launch your program inside of 'screen', which is a sort-of text-based Terminal application. Screen sess...
How to get git diff with full context?
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Is there a way to navigate to real implementation of method behind an interface?
...ions > Environment > Keyboard and search for Edit.GoToImplementation command. The default shortcut is Ctrl+F12. (F12 will navigate to the interface).
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Is there a way to 'pretty' print MongoDB shell output to a file?
...but hidden features because it's an interactive environment.
When you run commands from a javascript file via mongo commands.js you won't get quite identical behavior.
There are two ways around this.
(1) fake out the shell and make it think you are in interactive mode
$ mongo dbname << EOF...
Commands out of sync; you can't run this command now
... my PHP code, which calls two MySQL queries via mysqli, and get the error "Commands out of sync; you can't run this command now".
...
Select unique or distinct values from a list in UNIX shell script
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./yourscript.ksh | sort | uniq
(FYI, yes, the sort is necessary in this command line, uniq only strips duplicate lines that are immediately after each other)
EDIT:
Contrary to what has been posted by Aaron Digulla in relation to uniq's commandline options:
Given the following input:
class
ja...
Android - Camera preview is sideways
...peared to start out as a bug with certain hardware see here but can be overcome by using the call to mCamera.setDisplayOrientation(degrees) available in API 8. So this is how I implement it:
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
if (is...
Error: Could not find or load main class in intelliJ IDE
...d as my IDE with JDK 1.7. The following piece of code keeps does not even compile and keeps giving me the error:
36 Answer...
grep, but only certain file extensions
... \*.h --include \*.cpp CP_Image ~/path[12345] | mailx -s GREP email@domain.com
that should do what you want.
To take the explanation from HoldOffHunger's answer below:
grep: command
-r: recursively
-i: ignore-case
-n: each output line is preceded by its relative line number in the file
--inclu...