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What do 'real', 'user' and 'sys' mean in the output of time(1)?

...ll keyword So we grep source in the Bash 4.19 source code for the output string: git grep '"user\b' which leads us to execute_cmd.c function time_command, which uses: gettimeofday() and getrusage() if both are available times() otherwise all of which are Linux system calls and POSIX functio...
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When should I use malloc in C and when don't I?

... char *some_memory = "Hello World"; is creating a pointer to a string constant. That means the string "Hello World" will be somewhere in the read-only part of the memory and you just have a pointer to it. You can use the string as read-only. You cannot make changes to it. Example: some_...
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How do I execute a command and get the output of the command within C++ using POSIX?

...stream> #include <memory> #include <stdexcept> #include <string> #include <array> std::string exec(const char* cmd) { std::array<char, 128> buffer; std::string result; std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(cmd, "r"), pclose); ...
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How to write Unicode characters to the console?

...F8; for (var i = 0; i <= 1000; i++) { Console.Write(Strings.ChrW(i)); if (i % 50 == 0) { // break every 50 chars Console.WriteLine(); } } Console.ReadKey(); } } VB.NET imports Microsoft.VisualBasic imports System ...
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What does the 'b' character do in front of a string literal?

...xtra character. What would be a case in v3 where you would need to use a b string as opposed to just a regular string? – Jesse Webb Jun 7 '11 at 19:05 5 ...
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How to construct a std::string from a std::vector?

Short of (the obvious) building a C style string first then using that to create a std::string, is there a quicker/alternative/"better" way to initialize a string from a vector of chars? ...
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Regex: match everything but specific pattern

I need a regex able to match everything but a string starting with a specific pattern (specifically index.php and what follows, like index.php?id=2342343 ) ...
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How to read a line from the console in C?

...th specified declaring the variable and the length specified in the format string. It is a historical artefact. share | improve this answer | follow | ...
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How does HTTP file upload work?

... here ... ------WebKitFormBoundaryePkpFF7tjBAqx29L-- NOTE: each boundary string must be prefixed with an extra --, just like in the end of the last boundary string. The example above already includes this, but it can be easy to miss. See comment by @Andreas below. Instead of URL encoding the form...
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MySQL - How to select data by string length

Is there a MySQL function to do this (of course instead of string_length )? 6 Answers ...