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App Inventor 2 UrsAI2UDP 拓展 - UDP广播通信协议 · App Inventor 2 中文网
...标识符。然后，接收器会过滤掉它感兴趣的设备。
问题是：App Inventor 没有内置 UDP，而且我找不到可用的扩展。所以自己动手吧。
注意：
如果智能手机和远程站位于同一个（本地）网络中，则扩展可以完美运行。如果智能手...
Actual meaning of 'shell=True' in subprocess
...as the "shell." On Windows, there is no bourne shell descendent, only cmd.exe.
So invoking the shell invokes a program of the user's choosing and is platform-dependent. Generally speaking, avoid invocations via the shell.
Invoking via the shell does allow you to expand environment variables and ...
How can bcrypt have built-in salts?
... jony89jony89
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Groovy Shell warning “Could not open/create prefs root node …”
... (Windows 10 seems to now have this here: HKEY_LOCAL_MACHINE\Software\WOW6432Node\JavaSoft)
Right click on the JavaSoft folder and click on New -> Key
Name the new Key Prefs and everything should work.
Alternatively, save and execute a *.reg file with the following content:
Windows Registry Ed...
Windows equivalent of the 'tail' command
...Shell installed (I think it's included since XP) you can just run from cmd.exe:
Head Command:
powershell -command "& {Get-Content *filename* -TotalCount *n*}"
Tail Command:
powershell -command "& {Get-Content *filename* | Select-Object -last *n*}"
or, directly from PowerShell:
Get-Co...
Protecting Java Source Code From Being Accessed [closed]
...ou can embed your name, a hash, etc. in unseen parts of a file, especially EXE's. In NT days, Alternate Data Streams were popular.
Unusual characters
I'll throw this one in just for kicks. An old IRC impersonation trick was to make a name with letters that look similar to another person's name. You ...
What is the fastest/most efficient way to find the highest set bit (msb) in an integer in C?
...cific intrinsics like ARM GCC's __clz (no header needed), or x86's _lzcnt_u32 on CPUs that support the lzcnt instruction. (Beware that lzcnt decodes as bsr on older CPUs instead of faulting, which gives 31-lzcnt for non-zero inputs.)
There's unfortunately no way to portably take advantage of the v...
Get folder name from full file path
...me(Path.GetDirectoryName(@"c:\projects\root\wsdlproj\devlop\beta2\text\GTA.exe"));//Return "text"
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Get Android .apk file VersionName or VersionCode WITHOUT installing apk
... for me from the command line:
aapt dump badging myapp.apk
NOTE: aapt.exe is found in a build-tools sub-folder of SDK. For example:
<sdk_path>/build-tools/23.0.2/aapt.exe
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NumPy or Pandas: Keeping array type as integer while having a NaN value
...ferred way to keep the data type of a numpy array fixed as int (or int64 or whatever), while still having an element inside listed as numpy.NaN ?
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