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Linear Regression and group by in R
...6 -0.01852429
Degrees of freedom: 20 total; 16 residual
Residual standard error: 0.8201316
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云数据及Firebase组件简介 · App Inventor 2 中文网
...个设备上独立（本地）存储数据是不够的。
为了在任何连接的设备上存储应用程序所有用户的全局高分，应用程序的发明者应该将其存储在网上。 它应该被存储，以便游戏应用程序的每个副本都可以读取和写入有关高分的数据...
How to prevent SIGPIPEs (or handle them properly)
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You generally want to ignore the SIGPIPE and handle the error directly in your code. This is because signal handlers in C have many restrictions on what they can do.
The most portable way to do this is to set the SIGPIPE handler to SIG_IGN. This will prevent any socket or pipe ...
Create subdomains on the fly with .htaccess (PHP)
...fsockopen('localhost',2082);
if(!$openSocket) {
return "Socket error";
exit();
}
$authString = $cPanelUser . ":" . $cPanelPass;
$authPass = base64_encode($authString);
$buildHeaders = "GET " . $buildRequest ."\r\n";
$buildHeaders .= "HTTP/1.0\r\n";
$buil...
Finding differences between elements of a list
Given a list of numbers, how does one find differences between every ( i )-th elements and its ( i+1 )-th?
10 Answers
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Where are Docker images stored on the host machine?
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answered Nov 26 '14 at 16:05
Marc RechtéMarc Rechté
1,42711 gold badge1010 silver badges55 bronze badges
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“std::endl” vs “\n”
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@Omnifarious: No std::cerr should be reserved for errors. The two streams are not synced together so if you output some text to cout it may be buffered and the cerr will go direct to the output this resulting in a mixed mode display. Use cerr for what it is supposed to be fo...
join list of lists in python [duplicate]
Is the a short syntax for joining a list of lists into a single list( or iterator) in python?
15 Answers
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examining history of deleted file
... This doesn't seem to work for deleted files. If I try this, I get this error message: svn cat [url]/trunk/include/syeka/poster_funk.incl.php -r 50 > out.txt svn: '/admintools/!svn/bc/131/trunk/include/syeka/poster_funk.incl.php' path not found See @Bert Huijben's response further down this...
What's the difference between a Future and a Promise?
...;
})
...
.then(function(result){
console.log(result);
})
.catch(function(error){
console.log(error);
})
which makes asynchronous computation to look like synchronous:
try {
op1Result = syncOp1();
// do something
op1Result = syncOp2();
// do something more
op3Result = syncOp3();
//...