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Get the last 4 characters of a string [duplicate]
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I remember it like this, -4 is short hand for (length - 4)
– adnan2nd
Sep 16 '18 at 15:21
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How to calculate the intersection of two sets? [duplicate]
...contents of the collection you can throw an UnsupportedOperationException, and it also won't filter frequencies correctly (it retains any and all occurrences of a value in the left multiset, regardless of how many times it occurs in the right multiset).
– Allison
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Ubuntu下CodeBlock开发环境配置 - C/C++ - 清泛网 - 专注C/C++及内核技术
...），下面进行全局的编译、链接环境配置，Settings->Compile and Debugger settings，在Search directories选项夹Compile子选项夹里添加路径/usr/include，这样程序编译的时候就可以遍历搜索该文件夹，一般情况下头文件都在这个文件夹下（Qt4也...
c++获取windows程序的版本号 - C/C++ - 清泛网 - 专注C/C++及内核技术
... // Get the version information size for allocate the buffer
DWORD dwHandle;
DWORD dwDataSize = ::GetFileVersionInfoSize((LPTSTR)lpszModuleName, &dwHandle);
if ( dwDataSize == 0 )
return FALSE;
// Allocate buffer and retrieve version information
LPBYTE lpVersion...
how perform grep operation on all files in a directory
Working with xenserver, and I want to perform a command on each file that is in a directory, grepping some stuff out of the output of the command and appending it in a file.
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How to turn on (literally) ALL of GCC's warnings?
...n software. Doing calculations as double would use the software emulation and be slower. That's relevant for some embedded CPUs, but completely irrelevant for modern desktop CPUs with hardware support for 64-bit floating-point.
Another warning that's not usually useful is -Wtraditional, which war...
Disable password authentication for SSH [closed]
...ear text passwords
#PasswordAuthentication no
Uncomment the second line, and, if needed, change yes to no.
Then run
service ssh restart
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What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
In the following method definitions, what does the * and ** do for param2 ?
22 Answers
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What port is a given program using? [closed]
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netstat -b -a lists the ports in use and gives you the executable that's using each one. I believe you need to be in the administrator group to do this, and I don't know what security implications there are on Vista.
I usually add -n as well to make it a little...
Flags to enable thorough and verbose g++ warnings
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I went through and found the minimal set of includes that should get the maximum level of warning. I then removed from that list the set of warnings that I feel do not actually indicate something bad is happening, or else have too many fals...