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When should we use Observer and Observable?
...e of a Student and a MessageBoard. The Student registers by adding itself to the list of Observers that want to be notified when a new Message is posted to the MessageBoard. When a Message is added to the MessageBoard, it iterates over its list of Observers and notifies them that the event occurre...
Convert List to List
...
The way to make this work is to iterate over the list and cast the elements. This can be done using ConvertAll:
List<A> listOfA = new List<C>().ConvertAll(x => (A)x);
You could also use Linq:
List<A> listOfA ...
What unique features does Firebug have that are not built-in to Firefox?
...
Firefox's native developer tools have come a long way since this question was
written. The differences have mainly reduced to the following points:
Can't stop the script execution on DOM mutations, XHRs, or cookie changes.
XPaths can't be copied.
Mis...
Best practice to call ConfigureAwait for all server-side code
...n ASP.NET.
I had read that it is more performant since it doesn't have to switch thread contexts back to the original thread context.
This is true with UI applications, where there is only one UI thread that you have to "sync" back to.
In ASP.NET, the situation is a bit more complex. When an ...
App restarts rather than resumes
...mmon issue on Samsung devices as well as other manufacturers that use a custom launcher/skin. I haven't seen the issue occur on a stock Android launcher.
Basically, the app is not actually restarting completely, but your launch Activity is being started and added to the top of the Activity stack wh...
Best way for a 'forgot password' implementation? [closed]
I'm looking for the best method to implement a "forgot password" feature.
10 Answers
1...
Finding current executable's path without /proc/self/exe
It seems to me that Linux has it easy with /proc/self/exe. But I'd like to know if there is a convenient way to find the current application's directory in C/C++ with cross-platform interfaces. I've seen some projects mucking around with argv[0], but it doesn't seem entirely reliable.
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Why should casting be avoided? [closed]
...t happens only at compile time (i.e., you're just telling the compiler how to interpret/treat some data) or something that happens at run time (e.g., an actual conversion from double to long).
C++ attempts to deal with that to at least some extent by adding a number of "new" cast operators, each of...
Android - How To Override the “Back” button so it doesn't Finish() my Activity?
...stener or return true when you have KEY_BACK.
You just need the following to catch the back key (Make sure not to call super in onBackPressed()).
Also, if you plan on having a service run in the background, make sure to look at startForeground() and make sure to have an ongoing notification or els...
How to add a button to a PreferenceScreen?
I'm quite new to Android Development and just came across Preferences.
I found PreferenceScreen and wanted to create a login functionality with it. The only problem I have is that I don't know how I could add a "Login" button to the PreferenceScreen .
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