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Please explain the exec() function and its family

...ed by the caller You can mix them, therefore you have: int execl(const char *path, const char *arg, ...); int execlp(const char *file, const char *arg, ...); int execle(const char *path, const char *arg, ..., char * const envp[]); int execv(const char *path, char *const argv[]); int execvp(const...
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Installing Google Protocol Buffers on mac

...: implicit instantiation of undefined template 'std::__1::basic_istream<char, std::__1::char_traits<char> >' return ParseFromZeroCopyStream(&zero_copy_input) && input->eof(); ^ /Applications/Xcode.app/Co...
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How to use shared memory with Linux in C

...mory. #include <string.h> #include <unistd.h> int main() { char parent_message[] = "hello"; // parent process will write this message char child_message[] = "goodbye"; // child process will then write this one void* shmem = create_shared_memory(128); memcpy(shmem, parent_mes...
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Iterate over the lines of a string

...): return iter(foo.splitlines()) def f2(foo=foo): retval = '' for char in foo: retval += char if not char == '\n' else '' if char == '\n': yield retval retval = '' if retval: yield retval def f3(foo=foo): prevnl = -1 while True: ...
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Split string into array of character strings

I need to split a String into an array of single character Strings. 11 Answers 11 ...
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Check if a string has white space

...) { return /\s/g.test(s); } This will also check for other white space characters like Tab. share | improve this answer | follow | ...
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Windows下 C++网络延时检测 - C/C++ - 清泛网 - 专注C/C++及内核技术

... #define PING_TIMES 2 //ping 4 次 typedef struct _IPINFO { unsigned char Ttl; // Time To Live unsigned char Tos; // Type Of Service unsigned char IPFlags; // IP flags unsigned char OptSize; // Size of options data unsigned char FAR *Options; // Options data buffer }IPINFO;...
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Efficient way to remove ALL whitespace from String?

... IsExistingWorkspace() method. Since all workspaces consist of contiguous characters with no whitespace, I'm assuming the easiest way to find out if a particular workspace is in the list is to remove all whitespace (including newlines) and doing this (XML is the string received from the web request...
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#pragma pack effect

...example, given 4-byte integers and the following struct: struct Test { char AA; int BB; char CC; }; The compiler could choose to lay the struct out in memory like this: | 1 | 2 | 3 | 4 | | AA(1) | pad.................. | | BB(1) | BB(2) | BB(3) | BB(4) | | CC(1) | pa...
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Finding index of character in Swift String

...ring doesn't implement RandomAccessIndexType. Probably because they enable characters with different byte lengths. That's why we have to use string.characters.count (count or countElements in Swift 1.x) to get the number of characters. That also applies to positions. The _position is probably an ind...