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Should functions return null or an empty object?

What is the best practice when returning data from functions. Is it better to return a Null or an empty object? And why should one do one over the other? ...
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How should I validate an e-mail address?

What's a good technique for validating an e-mail address (e.g. from a user input field) in Android? org.apache.commons.validator.routines.EmailValidator doesn't seem to be available. Are there any other libraries doing this which are included in Android already or would I have to use RegExp? ...
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What is the difference between an abstract function and a virtual function?

What is the difference between an abstract function and a virtual function? In which cases is it recommended to use virtual or abstract? Which one is the best approach? ...
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Difference between innerText, innerHTML, and childNodes[].value?

What is the difference between innerHTML , innerText and childNodes[].value in JavaScript? 11 Answers ...
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How to show soft-keyboard when edittext is focused

...tomatically show the soft-keyboard when an EditText is focused (if the device does not have a physical keyboard) and I have two problems: ...
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Bootstrap combining rows (rowspan)

I am testing Twitter Bootstrap and got stuck with basic scaffolding with rows. I revisited their documentation number of times and I can see nesting columns where you can basically nest columns within a column but I cannot locate the capability of combining rows into one and have it aligned with ...
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TransactionScope automatically escalating to MSDTC on some machines?

... it's actions in a transaction. We're aiming to not require the MSDTC service to be enabled on our end-user's machines. ...
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Bash script absolute path with OS X

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Can I disable a CSS :hover effect via JavaScript?

I’m trying to prevent the browser from using the :hover effect of the CSS, via JavaScript. 9 Answers ...
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The multi-part identifier could not be bound

I've seen similar errors on SO, but I don't find a solution for my problem. I have a SQL query like: 15 Answers ...