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What are the main performance differences between varchar and nvarchar SQL Server data types?

I'm working on a database for a small web app at my school using SQL Server 2005 . I see a couple of schools of thought on the issue of varchar vs nvarchar : ...
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Stretch and scale CSS background

Is there a way to get a background in CSS to stretch or scale to fill its container? 16 Answers ...
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Appending a vector to a vector [duplicate]

Assuming I have 2 standard vectors: 4 Answers 4 ...
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Why are there two ways to unstage a file in Git?

Sometimes git suggests git rm --cached to unstage a file, sometimes git reset HEAD file . When should I use which? 13 An...
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How to detect user inactivity in Android

User start my app and logs in. Selects Session Timeout to be 5 mins. Does some operations on the app. (all in foreground) Now User bring Myapp to background and starts some other app. ----> Count down timer starts and logs out user after 5 mins OR user turns the screen OFF. ----> Cou...
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Is there a Google Voice API? [closed]

Is there an API (officially or unofficially) for Google Voice? I would like to have an API to work with voicemails, send/receive SMS messages, initiate calls, etc. ...
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How to loop through a directory recursively to delete files with certain extensions

I need to loop through a directory recursively and remove all files with extension .pdf and .doc . I'm managing to loop through a directory recursively but not managing to filter the files with the above mentioned file extensions. ...
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HTML5 Audio stop function

I am playing a small audio clip on click of each link in my navigation 15 Answers 15 ...
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Adding options to a using jQuery?

What's the easiest way to add an option to a dropdown using jQuery? 31 Answers 31 ...
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How to run SQL script in MySQL?

I want to execute a text file containing SQL queries, in MySQL. 17 Answers 17 ...