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What is a “callback” in C and how are they implemented?
...tring.h>
#include "../../common_typedef.h"
typedef void (*call_back) (S32, S32);
void test_call_back(S32 a, S32 b)
{
printf("In call back function, a:%d \t b:%d \n", a, b);
}
void call_callback_func(call_back back)
{
S32 a = 5;
S32 b = 7;
back(a, b);
}
S32 main(S32 argc, S8 *...
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：
...
Is it possible to use global variables in Rust?
...ation is performed at runtime. Here are a few examples:
static SOME_INT: i32 = 5;
static SOME_STR: &'static str = "A static string";
static SOME_STRUCT: MyStruct = MyStruct {
number: 10,
string: "Some string",
};
static mut db: Option<sqlite::Connection> = None;
fn main() {
p...
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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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...
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
...
IncrediAppIncrediApp
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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...
HTTP Error 503. The service is unavailable. App pool stops on accessing website
...trov
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38
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Find intersection of two nested lists?
...
If you want:
c1 = [1, 6, 7, 10, 13, 28, 32, 41, 58, 63]
c2 = [[13, 17, 18, 21, 32], [7, 11, 13, 14, 28], [1, 5, 6, 8, 15, 16]]
c3 = [[13, 32], [7, 13, 28], [1,6]]
Then here is your solution for Python 2:
c3 = [filter(lambda x: x in c1, sublist) for sublist in c2...