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How do I execute a command and get the output of the command within C++ using POSIX?
..._ptr<FILE, decltype(&pclose)> pipe(popen(cmd, "r"), pclose);
if (!pipe) {
throw std::runtime_error("popen() failed!");
}
while (fgets(buffer.data(), buffer.size(), pipe.get()) != nullptr) {
result += buffer.data();
}
return result;
}
Pre-C++11 version:...
C# 通过代码安装、卸载、启动、停止服务 - .NET(C#) - 清泛IT论坛，有思想、有深度
...g.Empty;
if (!ServiceIsExisted(serviceName, ref dispName))
{
// Install Servic...
What are the differences between a HashMap and a Hashtable in Java?
...r @aberrant80 or an admin by flagging. Flagging could help - will try that now.
– anon58192932
Oct 14 '16 at 20:05
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show 1 more comment
...
gdb: how to print the current line or find the current line number?
...sing most common register rip nowadays, replace with eip or very rarely ip if needed):
(gdb)info line *$rip
will show you line number and file source
(gdb) list *$rip
will show you that line with a few before and after
but probably
(gdb) frame
should be enough in many cases.
...
Batch script to delete files
...e escape, in a batch file, results in "The system cannot find the path specified". As I posted it works.
– Russ Freeman
Dec 7 '12 at 13:41
...
querySelector and querySelectorAll vs getElementsByClassName and getElementById in JavaScript
I would like to know what exactly is the difference between querySelector and querySelectorAll against getElementsByClassName and getElementById ?
...
Is there a PHP function that can escape regex patterns before they are applied?
...passed
// to preg_quote
$regex = '/\s' . $escapedUrl . '\s/';
// $regex is now: /\shttp\:\/\/stackoverflow\.com\/questions\?sort\=newest\s/
$haystack = "Bla bla http://stackoverflow.com/questions?sort=newest bla bla";
preg_match($regex, $haystack, $matches);
var_dump($matches);
// array(1) {
// ...
Remove property for all objects in array
...ps.
For example :
array.forEach(function(v){ delete v.bad });
Notes:
if you want to be compatible with IE8, you'd need a shim for forEach. As you mention prototype, prototype.js also has a shim.
delete is one of the worst "optimization killers". Using it often breaks the performances of your a...
How to change the text of a label?
...put[@name=<%=rbtnType.ClientID%>]:radio:checked").val();
if (rbvalue == "C") {
$('#<%=lblLabelName.ClientID %>').html('text1');
} else if (rbvalue == "I") {
$('#<%=lblLabelName.ClientID %>').html('else text2');
} e...
Why can lambdas be better optimized by the compiler than plain functions?
...so passing them to a function template will instantiate a new function specifically for that object. The compiler can thus trivially inline the lambda call.
For functions, on the other hand, the old caveat applies: a function pointer gets passed to the function template, and compilers traditionally...