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What does the NS prefix mean?
...e for the Cocoa frameworks came from the NeXTSTEP libraries Foundation and AppKit (those names are still used by Apple's Cocoa frameworks), and the NextStep engineers chose to prefix their symbols with NS.
Because Objective-C is an extension of C and thus doesn't have namespaces like in C++, symbol...
Difference between framework vs Library vs IDE vs API vs SDK vs Toolkits? [closed]
... (such as forms designers, resource editors, etc), compiling and debugging applications. e.g Eclipse, Visual Studio.
A Library is a chunk of code that you can call from your own code, to help you do things more quickly/easily. For example, a Bitmap Processing library will provide facilities for loa...
How to get current foreground activity context in android?
....VERSION_CODES.LOLLIPOP, this method is no longer available to third party applications: the introduction of document-centric recents means it can leak person information to the caller. For backwards compatibility, it will still return a small subset of its data: at least the caller's own tasks, and...
SmtpException: Unable to read data from the transport connection: net_io_connectionclosed
...TTLS became the standard for SMTP encryption. Unfortunately, as it always happens when a new standard is implemented, there is a hodgepodge of compatibility with all the clients and servers out there.
In my case, my user was trying to connect the software to a server that was forcing an immediate S...
Heroku Postgres - terminate hung query (idle in transaction)
..."friendly" request to cancel the 1234-query, and with some luck it will disappear after a while. Eventually, this is more efficient:
select pg_terminate_backend(1234);
If you have shell access and root or postgres permissions you can also do it from the shell. To "cancel" one can do:
kill -INT...
What Are the Differences Between PSR-0 and PSR-4?
...s something like 'relative path', PSR-0, 'absolute path'.
e.g.
config:
'App\Controller' => 'dir/'
PSR-0 autoload:
App\Controller\IndexController --> dir/App/Controller/IndexController.php
PSR-4 autoload:
App\Controller\IndexController --> dir/IndexController.php
And there are som...
How to use NSCache
... of methods
// that use it. For example, you could make it a field of your application
// delegate, or of your view controller, or something like that. Up to you.
NSCache *myCache = ...;
NSAssert(myCache != nil, @"cache object is missing");
// Try to get the existing object out of the cache, if it'...
Rails - Could not find a JavaScript runtime?
...was a bit hairy as this didn't fix it right away and I was also trying new apps with 3.0.9 and 3.0.4 but got (different) errors with them. Finally I did a new app again - and also got rails rc5 with it and added the rubytheracer and did a bunlde update and finally I can get the server up and running...
What does addChildViewController actually do?
...2011 videos and Mr. View Controller, Bruce D. Nilo, said this:
viewWillAppear:, viewDidAppear:, etc have nothing to do with addChildViewController:. All that addChildViewController: does is to say "This view controller is a child of that one" and it has nothing to do with view appearance. When t...
Visual List of iOS Fonts?
I am looking for a list of iOS Fonts for iOS 7. I have found the list on Apple's developer site, I am just wondering if anyone knows of a visual list where each font name is typed out in its typeface. I have seen one or two before, but the latest one I have seen was for iOS 5, and much more has be...