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How does @synchronized lock/unlock in Objective-C?
Does @synchronized not use "lock" and "unlock" to achieve mutual exclusion? How does it do lock/unlock then?
5 Answers
...
How to construct a relative path in Java from two absolute paths (or URLs)?
...java.nio.file.Path#relativize(Path), it just works with parent double-dots and all.
– Campa
Feb 12 '16 at 9:40
Conside...
Creating an object: with or without `new` [duplicate]
This is probably a basic question, and might have already been asked (say, here ); yet I still don't understand it. So, let me ask it.
...
Static classes and methods in coffeescript
...tor: () ->
@drawWorld: (world, context) -> alert 'World drawn!'
# And then draw your world...
Box2DUtility.drawWorld()
Demo: http://jsfiddle.net/ambiguous/5yPh7/
And if you want your drawWorld to act like a constructor then you can say new @ like this:
class Box2DUtility
constructor: ...
Superiority of unnamed namespace over static?
...
You're basically referring to the section §7.3.1.1/2 from the C++03 Standard,
The use of the static keyword is
deprecated when declaring objects in a
namespace scope; the
unnamed-namespace provides a superior
alternative.
Note that this paragraph was already removed in C++11. stat...
Core Data: Quickest way to delete all instances of an entity
...he full object model for, let's say, "Cars" - could be about 2000 of them (and I can't make the Web Service return anything less than 1 or ALL cars.
...
How do I export UIImage array as a movie?
...
Take a look at AVAssetWriter and the rest of the AVFoundation framework. The writer has an input of type AVAssetWriterInput, which in turn has a method called appendSampleBuffer: that lets you add individual frames to a video stream. Essentially you’ll...
C++ equivalent of Java's toString?
...
In C++ you can overload operator<< for ostream and your custom class:
class A {
public:
int i;
};
std::ostream& operator<<(std::ostream &strm, const A &a) {
return strm << "A(" << a.i << ")";
}
This way you can output instances ...
Using a BOOL property
...s used with heap allocated NSObjects like NSString*, NSNumber*, UIButton*, and etc, because memory managed accessors are created for free. When you create a BOOL, the value is always allocated on the stack and does not require any special accessors to prevent memory leakage. isWorking is simply th...
“Uncaught Error: [$injector:unpr]” with angular after deployment
...function($scope, $q) {
// your code
})
The minification changes $scope and $q into random variables that doesn't tell angular what to inject. The solution is to declare your dependencies like this:
angular.module("MyApp")
.controller("MyCtrl", ["$scope", "$q", function($scope, $q) {
// your...