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What are the uses of “using” in C#?

...ensure that the object is disposed as soon as it goes out of scope, and it doesn't require explicit code to ensure that this happens. As in Understanding the 'using' statement in C# (codeproject) and Using objects that implement IDisposable (microsoft), the C# compiler converts using (MyResource m...
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Adding images or videos to iPhone Simulator

...gePickerControllerSourceTypePhotoLibrary , but it says, "No photos". Where does the simulator get the images from? Where should I copy the images so that they are displayed in the simulator? ...
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The model used to open the store is incompatible with the one used to create the store

...and after upgrading in Xcode 4.2, I then added a new entity of the NSManagedObject subclass (refer to the new entity). 25 A...
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What does “SyntaxError: Missing parentheses in call to 'print'” mean in Python?

...Python 2 print statement: print "Hello, World!" The statement above does not work in Python 3. In Python 3 you need to add parentheses around the value to be printed: print("Hello, World!") “SyntaxError: Missing parentheses in call to 'print'” is a new error message that was added in...
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What is Android keystore file, and what is it used for?

...e transmitted and a whole variety of authentication. In terms of what you do with it for Android and probably what you're looking for since you mention signing apk's, it is your certificate. You are branding your application with your credentials. You can brand multiple applications with the same k...
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Is Java's assertEquals method reliable?

...trings . It seems that String.equals() is a better approach. Well, I'm doing JUnit testing and my inclination is to use assertEquals(str1, str2) . Is this a reliable way to assert two Strings contain the same content? I would use assertTrue(str1.equals(str2)) , but then you don't get the ben...
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Is there a benefit to defining a class inside another class in Python?

...e are nested classes. Essentially, I have two classes that I'm modeling. A DownloadManager class and a DownloadThread class. The obvious OOP concept here is composition. However, composition doesn't necessarily mean nesting, right? ...
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What's the best online payment processing solution? [closed]

...ransaction values (been a while since I've seen the exact numbers and they don't make it immediately obvious on the site, but this is for illustration only anyway) making it one of the most expensive solutions to use if you are selling high value low volume. Most smaller clients will fall into this ...
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Adding HTML entities using CSS content

How do you use the CSS content property to add HTML entities? 9 Answers 9 ...
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How to permanently remove few commits from remote branch

...ill restore the index and working tree, like a git reset --hard would. The documentation adds: -C <new-branch> --force-create <new-branch> Similar to --create except that if <new-branch> already exists, it will be reset to <start-point>. This is a convenient shortcu...