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How are the points in CSS specificity calculated

Researching specificity I stumbled upon this blog - http://www.htmldog.com/guides/cssadvanced/specificity/ 7 Answers ...
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Get operating system info

I recently started wondering about sites like http://thismachine.info/ that get the user's operating system info. I have not been able to find out how to do that with PHP, and wanted to try to figure it out. ...
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Google Maps API 3 - Custom marker color for default (dot) marker

I've seen lots of other questions similar to this ( here , here and here ), but they all have accepted answers that don't solve my problem. The best solution I have found to the problem is the StyledMarker library, which does let you define custom colours for markers, but I can't get it to use ...
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How to validate an email address using a regular expression?

Over the years I have slowly developed a regular expression that validates MOST email addresses correctly, assuming they don't use an IP address as the server part. ...
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What do “branch”, “tag” and “trunk” mean in Subversion repositories?

I've seen these words a lot around Subversion (and I guess general repository) discussions. I have been using SVN for my projects for the last few years, but I've never grasped the complete concept of these directories. ...
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How to initialize an array's length in JavaScript?

Most of the tutorials that I've read on arrays in JavaScript (including w3schools and devguru ) suggest that you can initialize an array with a certain length by passing an integer to the Array constructor using the var test = new Array(4); syntax. ...
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Delete element in a slice

How does this delete trick with the append function work? 6 Answers 6 ...
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Which one will execute faster, if (flag==0) or if (0==flag)?

Interview question: Which one will execute faster, if (flag==0) or if (0==flag) ? Why? 16 Answers ...
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deleting rows in numpy array

I have an array that might look like this: 6 Answers 6 ...
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How to decide font color in white or black depending on background color?

I want to show some images like this example 22 Answers 22 ...