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How to think in data stores instead of databases?

As an example, Google App Engine uses Google Datastore, not a standard database, to store data. Does anybody have any tips for using Google Datastore instead of databases? It seems I've trained my mind to think 100% in object relationships that map directly to table structures, and now it's hard t...
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Disposing WPF User Controls

... that its dispose method will always get called once the containing window/application is closed. However, UserControl is not disposable. I tried implementing the IDisposable interface and subscribing to the Unloaded event but neither get called when the host application closes. If at all possible, ...
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Auto-loading lib files in Rails 4

... I think this may solve your problem: in config/application.rb: config.autoload_paths << Rails.root.join('lib') and keep the right naming convention in lib. in lib/foo.rb: class Foo end in lib/foo/bar.rb: class Foo::Bar end if you really wanna do some monkey...
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“Uncaught Error: [$injector:unpr]” with angular after deployment

I have a fairly simple Angular application that runs just fine on my dev machine, but is failing with this error message (in the browser console) after I deploy it: ...
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Read/Write String from/to a File in Android

...ing = bufferedReader.readLine()) != null ) { stringBuilder.append("\n").append(receiveString); } inputStream.close(); ret = stringBuilder.toString(); } } catch (FileNotFoundException e) { Log.e("login activity", "File not f...
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windows service vs scheduled task

...arate out your processing code into a different component from the console app or Windows Service. Then you have the choice, either to call the worker process from a console application and hook it into Windows Scheduler, or use a Windows Service. You'll find that scheduling a Windows Service isn't...
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How to manage startActivityForResult on Android?

...ctivityResult() then check its parameters: requestCode identifies which app returned these results. This is defined by you when you call startActivityForResult(). resultCode informs you whether this app succeeded, failed, or something different data holds any information returned by this app. Thi...
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Xcode 4: How do you view the console?

... If you just want to have the log output display when you run your app then you can go into XCode4 preferences -> Alerts and click on 'Run starts' on the left hand column. Then select 'Show Debugger' and when you run the app the NSLog output will be displayed below the editor pane. This...
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How to check if activity is in foreground or in visible background?

...credits go to Dan, CommonsWare and NeTeInStEiN) Track visibility of your application by yourself using Activity.onPause, Activity.onResume methods. Store "visibility" status in some other class. Good choices are your own implementation of the Application or a Service (there are also a few va...
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How can I view the shared preferences file using Android Studio?

I'm using shared preferences to store certain values for my app. I would like to see the file where the info is actually stored on my phone. I found many ways to do this on Eclipse, but I'm debugging on Android Studio. My phone is rooted. I read that having root access is important to read these typ...