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Mind+ 掌控板、ESP32开发板等硬件如何接入AppInventor？ - 创客硬件开发 - ...
Mind+ 掌控板、ESP32开发板等硬件如何接入AppInventor？
由于硬件板种类繁多，这里仅讨论硬件与AppInventor的通信方式，及使用什么组件。一般不外乎2种方式：
1、蓝牙（经典蓝牙），使用 蓝牙客户端 组件。Mind+ 参考代码如下：
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Loop through files in a directory using PowerShell
...st want to add... a different approach usable in PowerShell:
Install GNUWin32 utils and use grep to view the lines / redirect the output to file http://gnuwin32.sourceforge.net/
This overwrites the new file every time:
grep "step[49]" logIn.log > logOut.log
This appends the log output, in ca...
What is the argument for printf that formats a long?
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On most platforms, long and int are the same size (32 bits). Still, it does have its own format specifier:
long n;
unsigned long un;
printf("%ld", n); // signed
printf("%lu", un); // unsigned
For 64 bits, you'd want a long long:
long long n;
unsigned long long un;
printf(...
pytest: assert almost equal
...01):
return abs(x-y) < threshold
assert all(map(almost_equal, zip((1.32, 2.4), i_return_tuple_of_two_floats())
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Get file version in PowerShell
... That's actually not right. Look at get-item C:\Windows\System32\ubpm.dll | % VersionInfo | fl * -force and compare the FilePrivatePart to the last part of the FileVersion. The FileVersion shows what originally shipped, and not the patched version. This command, on the other hand, show...
Multiple levels of 'collection.defaultdict' in Python
...thon daily.
– mVChr
Nov 3 '14 at 22:32
3
Looking for more details about using this method with mu...
Notification passes old Intent Extras
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IncrediAppIncrediApp
9,89322 gold badges2929 silver badges2424 bronze badges
...
What's “wrong” with C++ wchar_t and wstrings? What are some alternatives to wide characters?
...rs are more likely to be noticed and fixed than if you try to stick to UTF-32 with NFC or NFKC.
Many platforms use UTF-8 as their native char encoding and many programs do not require any significant text processing, and so writing an internationalized program on those platforms is little different...
hash function for string
...ns One At A Time Hash. It also quotes improved versions of this hash.
uint32_t jenkins_one_at_a_time_hash(char *key, size_t len)
{
uint32_t hash, i;
for(hash = i = 0; i < len; ++i)
{
hash += key[i];
hash += (hash << 10);
hash ^= (hash >> 6);
}
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How to Compare Flags in C#?
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In .NET 4 there is a new method Enum.HasFlag. This allows you to write:
if ( testItem.HasFlag...