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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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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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Change key pair for ec2 instance

...S management console? I can stop the instance, I can create new key pair, but I don't see any link to modify the instance's key pair. ...
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“Insufficient Storage Available” even there is lot of free space in device memory

...fter installation it will take less than 20 MB. In Galaxy Note I , while updating my app, it's saying "Insufficient Storage Available", where there is 214 MB of free space in device memory (internal). It happens even trying to download a new app. ...
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Android: How can I get the current foreground activity (from a service)?

Is there a native android way to get a reference to the currently running Activity from a service? 12 Answers ...
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What is reflection and why is it useful?

What is reflection, and why is it useful? 21 Answers 21 ...
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How can I install pip on Windows?

pip is a replacement for easy_install . But should I install pip using easy_install on Windows? Is there a better way? ...
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Building and running app via Gradle and Android Studio is slower than via Eclipse

I have a multi-project (~10 modules) of which building takes about 20-30 seconds each time. When I press Run in Android Studio, I have to wait every time to rebuild the app, which is extremely slow. ...
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How to fix 'android.os.NetworkOnMainThreadException'?

I got an error while running my Android project for RssReader. 59 Answers 59 ...
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Difference between method and function in Scala

I read Scala Functions (part of Another tour of Scala ). In that post he stated: 9 Answers ...