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Define: What is a HashSet?
...ovides standard set operations such as union, intersection, and symmetric difference. Take a look here
There are different implementations of Sets. Some make insertion and lookup operations super fast by hashing elements. However, that means that the order in which the elements were added is lost. ...
Is there a DesignMode property in WPF?
...ass MyUserControl : UserControl
{
public MyUserControl()
{
if (DesignerProperties.GetIsInDesignMode(this))
{
// Design-mode specific functionality
}
}
}
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PHP Regex to check date is in YYYY-MM-DD format
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Try this.
$date="2012-09-12";
if (preg_match("/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])$/",$date)) {
return true;
} else {
return false;
}
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How exactly does the python any() function work?
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If you use any(lst) you see that lst is the iterable, which is a list of some items. If it contained [0, False, '', 0.0, [], {}, None] (which all have boolean values of False) then any(lst) would be False. If lst also contain...
How to convert a color integer to a hex String in Android?
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Don't use this answer if your color uses alpha. You'll lose it.
– Simon
Sep 27 '17 at 20:40
6
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Recursive Lock (Mutex) vs Non-Recursive Lock (Mutex)
...x. Not all systems supporting pthreads also support recursive mutexes, but if they want to be POSIX conform, they have to .
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Why is isNaN(null) == false in JS?
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I believe the code is trying to ask, "is x numeric?" with the specific case here of x = null. The function isNaN() can be used to answer this question, but semantically it's referring specifically to the value NaN. From Wikipedia for NaN:
NaN (Not a Number) is a value of the numeric d...
How to differ sessions in browser-tabs?
In a web-application implemented in java using JSP and Servlets; if I store information in the user session, this information is shared from all the tabs from the same browser. How to differ sessions in the browser-tabs?
In this example:
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What is the difference between @Inject and @Autowired in Spring Framework? Which one to use under wh
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So in theory if you used @Inject you could replace spring with another DI framework e.g. Guice and inject your dependencies in the same way.
– Alex Barnes
Jan 25 '12 at 14:30
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CURL to access a page that requires a login from a different page
I have 2 pages: xyz.com/a and xyz.com/b . I can only access xyz.com/b if and only if I login to xyz.com/a first. If accessing xyz.com/b without going through the other, I simply get access denied (no redirect to login) via the browser. Once I login at xyz.com/a , I can access the other.
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