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Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
...d that this may very depending on compiler version, optimisation settings, etc).
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What makes Lisp macros so special?
...What this says is: Evaluate expr1, and, should it be true, evaluate expr2, etc.
Now try to make this && into a function... thats right, you can't. Calling something like:
and(expr1, expr2, expr3)
Will evaluate all three exprs before yielding an answer regardless of whether expr1 was fals...
GridCtrl 控件FAQ - C/C++ - 清泛网 - 专注C/C++及内核技术
...
//设置控件的初始行数和列数
m_Grid.SetRowCount(1);
m_Grid.SetColumnCount(4);
//设置控件背景颜色，这里GetDefaultCell的两个参数分别表示是否是固定行或者是固定列。如果不设定，缺省的颜色为白色。
m_Grid.GetDefaultCell(FALSE, FALSE)->Set...
Insert, on duplicate update in PostgreSQL?
...sient errors - reboots under load, client errors mid-transaction, crashes, etc. You must never, ever rely on SERIAL / SEQUENCE or AUTO_INCREMENT not having gaps. If you need gapless sequences they're more complex; you need to use a counter table usually. Google will tell you more. But be aware gaple...
android button selector
...pressed state? (with all the components above such as round color, stroke, etc). Many thanks!
– pearmak
Dec 24 '12 at 17:13
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AngularJS- Login and Authentication in each route and controller
...erty(prop)) {
delete userProfile[prop];
}
}
};
var fetchUserProfile = function () {
return Auth.getProfile().then(function (response) {
clearUserProfile();
return angular.extend(userProfile, response.data, {
$refresh: fetchUserProfile,
$hasRol...
Types in MySQL: BigInt(20) vs Int(20)
...the developers - as I would have guessed it was width + max value, or bits/etc.
– Sh4d0wsPlyr
May 25 '15 at 23:51
31
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What is a MIME type?
... have chosen to write your first letter in Tamil, and the second in German etc.
In order for your friend to translate those letters, your friend would need to:
(i) identify the language type, and
(ii) and then translate it accordingly.
But identifying a language is not that easy - it's going t...
Why do we need message brokers like RabbitMQ over a database like PostgreSQL?
...ay no longer require an external queueing system since it's now simple to fetch 'n' rows that no other session has locked, and keep them locked until you commit confirmation that the work is done. It even works with two-phase transactions for when external co-ordination is required.
External queuei...
Spinlock versus Semaphore
...data, and finally modifies a shared reference (append data to a container, etc.) before releasing the lock. Instead, one would acquire the lock only for the purpose of accessing the shared resource.
Since this means that there is considerably more work outside the critical section than inside it, na...