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User recognition without cookies or local storage
...ed by some combination of the following:
IP Address
Real IP Address
Proxy IP Address (users often use the same proxy repeatedly)
Cookies
HTTP Cookies
Session Cookies
3rd Party Cookies
Flash Cookies (most people don't know how to delete these)
Web Bugs (less reliable because bugs get fixed, b...
Mediator Vs Observer Object-Oriented Design Patterns
...r promotes loose coupling by keeping objects from referring to each other explicitly, and it lets you vary their interaction independently.
Source: dofactory
Example:
The observer pattern:
Class A, can have zero or more observers of type O registered with it. When something in A is changed it no...
How to define static property in TypeScript interface
...e = new Date();
}
Because Date is an interface in TypeScript, you can't extend it with a class using the extends keyword, which is a bit of a shame as this would be a good solution if date was a class.
If you want to extend the Date object to provide a MinValue property on the prototype, you can:...
Sleep in JavaScript - delay between actions
...a + 4;
}, (3 * 1000));
This doesn't really 'sleep' JavaScript—it just executes the function passed to setTimeout after a certain duration (specified in milliseconds). Although it is possible to write a sleep function for JavaScript, it's best to use setTimeout if possible as it doesn't freeze ev...
Is this a “good enough” random algorithm; why isn't it used if it's faster?
...;
public class Test {
public static void main(String[] args) throws Exception {
QuickRandom qr = new QuickRandom();
int[] frequencies = new int[10];
for (int i = 0; i < 100000; i++) {
frequencies[(int) (qr.random() * 10)]++;
}
printDistrib...
Detect if device is iOS
...or.userAgent and navigator.platform can be faked by the user or a browser extension.
Browser extensions to change userAgent or platform exist because websites use too heavy-handed detection and often disable some features even if the user's browser would otherwise be able to use that feature.
To de-...
Origin is not allowed by Access-Control-Allow-Origin
I read about cross domain ajax requests, and understand the underlying security issue. In my case, 2 servers are running locally, and like to enable cross domain requests during testing.
...
Remove a JSON attribute [duplicate]
... So would delete myObj['test']['key1']; you can interchange whatever.x and whatever['x'] as long as x is a valid variable name, so even delete myObj['test'].key1 would work.
– Sinan Taifour
Aug 2 '09 at 20:21
...
How to print to console when using Qt
...ut you could try something like this (as Kyle Strand has pointed out):
QTextStream& qStdOut()
{
static QTextStream ts( stdout );
return ts;
}
You could then call as follows:
qStdOut() << "std out!";
sh...
What are the main disadvantages of Java Server Faces 2.0?
... / jQuery developer. What I liked most about JSF was the huge amount of AJAX-Enabled UI components which seem to make development much faster than with ASP.NET MVC, especially on AJAX-heavy sites. Integration testing looked very nice too.
...