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string.Join on a List or other type
...le<T>)
If you can't upgrade, you can achieve the same effect using Select and ToArray.
return string.Join(",", a.Select(x => x.ToString()).ToArray());
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How to change string into QString?
...QString::fromStdString(str);
If by string you mean Ascii encoded const char * then you can use this method:
QString QString::fromAscii(const char * str, int size = -1)
const char* str = "Hello world";
QString qstr = QString::fromAscii(str);
If you have const char * encoded with system enco...
What is the difference between static_cast and C style casting?
...situations where all that is needed is a simple conversion. The ability to select between several different casting operators of differing degrees of power can prevent programmers from inadvertently casting to an incorrect type.
...
How to raise a ValueError?
I have this code which finds the largest index of a specific character in a string, however I would like it to raise a ValueError when the specified character does not occur in a string.
...
char类型移动跨平台踩过的坑 - C/C++ - 清泛网 - 专注IT技能提升
char类型移动跨平台踩过的坑CFLAG-fsigned-charchar强转int时,发现在x86平台下是按照有符号处理的,但是在ARM32下被当成了无符号导致问题,ARM64正常有符号。经调查,在PC上,char类型默认为signed-char,但是在一些嵌入式设备
char强转...
char类型移动跨平台踩过的坑 - C/C++ - 清泛网移动版 - 专注IT技能提升
char类型移动跨平台踩过的坑CFLAG-fsigned-charchar强转int时,发现在x86平台下是按照有符号处理的,但是在ARM32下被当成了无符号导致问题,ARM64正常有符号。经调查,在PC上,char类型默认为signed-char,但是在一些嵌入式设备
char强转...
char类型移动跨平台踩过的坑 - C/C++ - 清泛网 - 专注IT技能提升
char类型移动跨平台踩过的坑CFLAG-fsigned-charchar强转int时,发现在x86平台下是按照有符号处理的,但是在ARM32下被当成了无符号导致问题,ARM64正常有符号。经调查,在PC上,char类型默认为signed-char,但是在一些嵌入式设备
char强转...
char类型移动跨平台踩过的坑 - C/C++ - 清泛网移动版 - 专注IT技能提升
char类型移动跨平台踩过的坑CFLAG-fsigned-charchar强转int时,发现在x86平台下是按照有符号处理的,但是在ARM32下被当成了无符号导致问题,ARM64正常有符号。经调查,在PC上,char类型默认为signed-char,但是在一些嵌入式设备
char强转...
char类型移动跨平台踩过的坑 - C/C++ - 清泛网移动版 - 专注IT技能提升
char类型移动跨平台踩过的坑CFLAG-fsigned-charchar强转int时,发现在x86平台下是按照有符号处理的,但是在ARM32下被当成了无符号导致问题,ARM64正常有符号。经调查,在PC上,char类型默认为signed-char,但是在一些嵌入式设备
char强转...
char类型移动跨平台踩过的坑 - C/C++ - 清泛网 - 专注IT技能提升
char类型移动跨平台踩过的坑CFLAG-fsigned-charchar强转int时,发现在x86平台下是按照有符号处理的,但是在ARM32下被当成了无符号导致问题,ARM64正常有符号。经调查,在PC上,char类型默认为signed-char,但是在一些嵌入式设备
char强转...