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How do I center text horizontally and vertically in a TextView?

How do I center the text horizontally and vertically in a TextView , so that it appears exactly in the middle of the TextView in Android ? ...
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What is the appropriate HTTP status code response for a general unsuccessful request (not an error)?

...return a status code that reflects success (status codes from 200 to 206 and from 300 to 307) but include a message body that describes an error condition. Doing this prevents HTTP-aware software from detecting errors. For example, a cache will store it as successful response and serve it to...
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How many levels of pointers can we have?

... The C standard specifies the lower limit: 5.2.4.1 Translation limits 276 The implementation shall be able to translate and execute at least one program that contains at least one instance of every one of the following limits...
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Count number of rows within each group

I have a dataframe and I would like to count the number of rows within each group. I reguarly use the aggregate function to sum data as follows: ...
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Why am I not getting a java.util.ConcurrentModificationException in this example?

...s says in the Javadoc: The iterators returned by this class's iterator and listIterator methods are fail-fast: if the list is structurally modified at any time after the iterator is created, in any way except through the iterator's own remove or add methods, the iterator will throw a Con...
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Do AJAX requests retain PHP Session info?

If I had a user logged onto my site, having his id stored in $_SESSION , and from his browser he clicked a 'Save' button which would make an AJAX request to the server. Will his $_SESSION and cookies be retained in this request, and can I safely rely on the id being present in the $_SESSION ? ...
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List all files and directories in a directory + subdirectories

I want to list every file and directory contained in a directory and subdirectories of that directory. If I chose C:\ as the directory, the program would get every name of every file and folder on the hard drive that it had access to. ...
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Twitter Bootstrap - Tabs - URL doesn't change

I'm using Twitter Bootstrap and its "tabs". 15 Answers 15 ...
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Listen for key press in .NET console app

... @v.oddou After the last line, simply add your Console.ReadLine() and you're set, no? – Gaffi Jan 16 '16 at 1:13 1 ...
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Can you organize imports for an entire project in eclipse with a keystroke?

Wouldn't it be nice to just do a keystroke and have eclipse organize all imports in all java classes instead of just the one you are looking at? Is this possible? Is there a keystroke for it? ...