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Why are hexadecimal numbers prefixed with 0x?
...identifier/reserved word). Something is still needed to specify the number base: the x is an arbitrary choice.
Long story: In the 60's, the prevalent programming number systems were decimal and octal — mainframes had 12, 24 or 36 bits per byte, which is nicely divisible by 3 = log2(8).
The BCPL ...
Polymorphism vs Overriding vs Overloading
...
The clearest way to express polymorphism is via an abstract base class (or interface)
public abstract class Human{
...
public abstract void goPee();
}
This class is abstract because the goPee() method is not definable for Humans. It is only definable for the subclasses Male ...
How to deal with IntelliJ IDEA project files under Git source control constantly changing?
...
You can use IDEA's directory-based project structure, where the settings are stored in .idea directory instead of .ipr file. It gives more fine-grained control over what is stored in version control. The .iml files will still be around, so it doesn't sol...
Sort an Array by keys based on another Array?
...er = array('north', 'east', 'south', 'west');
You can sort another array based on values using array_intersectDocs:
/* sort by value: */
$array = array('south', 'west', 'north');
$sorted = array_intersect($order, $array);
print_r($sorted);
Or in your case, to sort by keys, use array_intersect...
Difference between a Message Broker and an ESB
...he one area, other stronger in another. Perhaps a choice needs to be made based on which function best covers an individual problem.
A broker may have better built-in "lego blocks" for constructing a transformation chain than an ESB product does. A broker pressed into service as an ESB may be cru...
What are the benefits of functional programming? [closed]
... the same time is called parallelism. See en.wikipedia.org/wiki/Concurrency_(computer_science)
– Lambda Fairy
Dec 9 '11 at 1:28
add a comment
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How can I stop .gitignore from appearing in the list of untracked files?
...for ignores that aren't project related, such as emacs *~ backup files, .DS_Store from OS X and so on.
– August Lilleaas
May 19 '10 at 7:48
38
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How can I pass a parameter to a setTimeout() callback?
...ed here. This is copied and pasted from the excellent underscore library:
_.delay = function(func, wait) {
var args = slice.call(arguments, 2);
return setTimeout(function(){ return func.apply(null, args); }, wait);
};
You can pass as many arguments as you'd like to the function called by setT...
How to detect internet speed in JavaScript?
...e.end - measure.start;
return measure;
}
/**
* Requires that we pass a base url to the worker
* The worker will measure the download time needed to get
* a ~0KB and a 100KB.
* It will return a string that serializes this informations as
* pipe separated values
*/
onmessage = function(e) {
...
Why are C# interface methods not declared abstract or virtual?
...onsider this weird case:
interface MyInterface {
void Method();
}
class Base {
public void Method();
}
class Derived : Base, MyInterface { }
If Base and Derived are declared in the same assembly, the compiler will make Base::Method virtual and sealed (in the CIL), even though Base doesn't imp...