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Resolve build errors due to circular dependency amongst classes
... A.h
class A {
B _b;
};
// file: B.h
class B {
A _a;
};
// file main.cc
#include "A.h"
#include "B.h"
int main(...) {
A a;
}
When you are compiling the .cc file (remember that the .cc and not the .h is the unit of compilation), you need to allocate space for object A. So, well, how much sp...
What's the difference between := and = in Makefile?
...
A simple assignment expression is evaluated only once, at the very first occurrence.
For example, if CC :=${GCC} ${FLAGS} during the first encounter is evaluated to gcc -W then
each time ${CC} occurs it will be replaced with gcc -W.
Recursive assignment =
A Recursive assignment expression is ev...
How to open, read, and write from serial port in C?
... tty.c_oflag = 0; // no remapping, no delays
tty.c_cc[VMIN] = 0; // read doesn't block
tty.c_cc[VTIME] = 5; // 0.5 seconds read timeout
tty.c_iflag &= ~(IXON | IXOFF | IXANY); // shut off xon/xoff ctrl
tty.c_cflag |= (CLOCA...
google mock分享（全网最全最好的gmock文档，没有之一） - C/C++ - 清泛网 ...
...果是一个形参，就是MOCK_METHOD1了，以此往下。
FooMain.cc
#include <cstdlib>
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <iostream>
#include <string>
#include "MockFoo.h"
using namespace seamless;
using namespace std;
using ::testing::Return;...
Single quotes vs. double quotes in C or C++
...instance:
const uint32_t png_ihdr = 'IHDR';
The resulting constant (in GCC, which implements this) has the value you get by taking each character and shifting it up, so that 'I' ends up in the most significant bits of the 32-bit value. Obviously, you shouldn't rely on this if you are writing plat...
Deciding between HttpClient and WebClient
...ce there are things like report progress, custom URI scheme and making FTP calls that WebClient provides — but HttpClient doesn’t.
+--------------------------------------------+--------------------------------------------+
| WebClient | ...
What techniques can be used to speed up C++ compilation times?
...ry. This is a good place for STL headers and other library include files.
ccache is another utility that takes advantage of caching techniques to speed things up.
Use Parallelism
Many compilers / IDEs support using multiple cores/CPUs to do compilation simultaneously. In GNU Make (usually used wi...
How do I debug error ECONNRESET in Node.js?
...ole.log('Socket ON')
})
Start it up using v0.9.9 and then attempt to FTP to this server. I'm using FTP and port 21 only because I'm on Windows and have an FTP client, but no telnet client handy.
Then from the client side, just break the connection. (I'm just doing Ctrl-C)
You should see NO ...
App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...象
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App Inventor 2 中文网VIP专享内容 · App Inventor 2 中文网
... 【OCR识别】App Inventor 2 OCR 图片文字识别全方案总结
【FTP】App Inventor 2 FTP 上传下载全方案总结
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