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reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?
In my multithreaded asmx web service I had a class field _allData of my own type SystemData which consists of few List<T> and Dictionary<T> marked as volatile . The system data ( _allData ) is refreshed once in a while and I do it by creating another object called newData and fill...
Make a negative number positive
...
Note the edge cases, e.g. Math.abs(Integer.MIN_VALUE) = Integer.MIN_VALUE.
– Zach Scrivena
Jan 30 '09 at 0:24
...
Https Connection Android
...rify the host - dont check for certificate
final static HostnameVerifier DO_NOT_VERIFY = new HostnameVerifier() {
public boolean verify(String hostname, SSLSession session) {
return true;
}
};
/**
* Trust every server - dont check for any certificate
*/
private static void trustAl...
what is reverse() in Django
...t's suppose that in your urls.py you have defined this:
url(r'^foo$', some_view, name='url_name'),
In a template you can then refer to this url as:
<!-- django <= 1.4 -->
<a href="{% url url_name %}">link which calls some_view</a>
<!-- django >= 1.5 or with {% load ur...
How to call base.base.method()?
... would use something like this:
class Derived : Base
{
protected bool _useBaseSay = false;
public override void Say()
{
if(this._useBaseSay)
base.Say();
else
Console.WriteLine("Called from Derived");
}
}
Of course, in a real implementation,...
Delegates in swift?
...ata.
protocol FooTwoViewControllerDelegate:class {
func myVCDidFinish(_ controller: FooTwoViewController, text: String)
}
Step2: Declare the delegate in the sending class (i.e. UIViewcontroller)
class FooTwoViewController: UIViewController {
weak var delegate: FooTwoViewControllerDelega...
Java string to date conversion
... 1234000000
V time-zone ID zone-id America/Los_Angeles; Z; -08:30
z time-zone name zone-name Pacific Standard Time; PST
O localized zone-offset offset-O GMT+8; GMT+08:00; UTC-08:00;
X zone-offset 'Z' for zero offset-X ...
Alias with variable in bash [duplicate]
...or that, rather than alias, and then exported it, like this:
function tail_ls { ls -l "$1" | tail; }
export -f tail_ls
Note -f switch to export: it tells it that you are exporting a function. Put this in your .bashrc and you are good to go.
...
Are global variables in PHP considered bad practice? If so, why?
...quests.
Often (always?) you can call member functions in methods like preg_replace_callback() like this:
preg_replace_callback('!pattern!', array($obj, 'method'), $str);
See callbacks for more.
The point is that objects have been bolted onto PHP and in some ways lead to some awkwardness.
Don't...
How can I implement an Access Control List in my Web MVC application?
... protected $target = null;
protected $acl = null;
public function __construct( $target, $acl )
{
$this->target = $target;
$this->acl = $acl;
}
public function __call( $method, $arguments )
{
if (
method_exists( $this->target, $...