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Why do Objective-C files use the .m extension?

...y they have chosen the extension .m for the implementation files - was it supposed to mean something, or was it just a random letter? ...
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Android: What is android.R.id.content used for?

Anybody could explain the meaning of "android.R.id.content" ? 3 Answers 3 ...
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Index on multiple columns in Ruby on Rails

I'm implementing functionality to track which articles a user has read. 2 Answers 2 ...
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MySQL: Selecting multiple fields into multiple variables in a stored procedure

Can I SELECT multiple columns into multiple variables within the same select query in MySQL? 3 Answers ...
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Real-world applications of zygohistomorphic prepromorphisms

... Sharon Curtis and Shin-Cheng Mu have a Functional Pearl using zygomorphisms to find maximally dense segments (a generalization of maximum segment sums). Zygomorphisms are seemingly a good fit for sliding window problems once you are ...
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Is there a way to use two CSS3 box shadows on one element?

I'm trying to replicate a button style in a Photoshop mock-up that has two shadows on it. The first shadow is an inner lighter box shadow (2px), and the second is a drop shadow outside the button (5px) itself. ...
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Select second last element with css

I already know of :last-child. But is there a way to select the div: 2 Answers 2 ...
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How to know the size of the string in bytes?

... You can use encoding like ASCII to get a character per byte by using the System.Text.Encoding class. or try this System.Text.ASCIIEncoding.Unicode.GetByteCount(string); System.Text.ASCIIEncoding.ASCII.GetByteCount(string)...
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PHP namespaces and “use”

I am having a little trouble with namespaces and the use statements. 2 Answers 2 ...
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Will Dispose() be called in a using statement with a null object?

Is it safe to use the using statement on a (potentially) null object? Consider the following example: 5 Answers ...