大约有 22,000 项符合查询结果(耗时:0.0228秒) [XML]

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MySQL: Order by field size/length

...DER BY LENGTH(description) DESC; The LENGTH function gives the length of string in bytes. If you want to count (multi-byte) characters, use the CHAR_LENGTH function instead: SELECT * FROM TEST ORDER BY CHAR_LENGTH(description) DESC; ...
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How to get a tab character?

...ive to be more complete. When I tried the "pre" based answers, they added extra vertical line breaks as well. Each tab can be converted to a sequence non-breaking spaces which require no wrapping. "    " This is not recommended for repeated/extensive use...
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How to split a delimited string in Ruby and convert it to an array?

I have a string 5 Answers 5 ...
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Check if a string contains a string in C++

I have a variable of type std::string . I want to check if it contains a certain std::string . How would I do that? 12 ...
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std::string的截取字符串的方法 - C/C++ - 清泛网 - 专注C/C++及内核技术

std::string的截取字符串的方法例如截取ip:port,代码如下:std::string ip("127.0.0.1:8888");int index = ip.find_last_of(':'); ipip.substr(0, index)....例如截取ip:port,代码如下: std::string ip("127.0.0.1:8888"); int index = ip.find_last_of(':'); //ip ip.substr(0, in...
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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...
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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...
https://www.tsingfun.com/it/cp... 

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...
https://www.tsingfun.com/it/cp... 

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...
https://www.tsingfun.com/it/cp... 

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...