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Changing the color of an hr element

I want to change the color of my hr tag using CSS. The code I've tried below doesn't seem to work: 26 Answers ...
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Ruby on Rails: How can I revert a migration with rake db:migrate?

After installing devise MODEL User i got this. 9 Answers 9 ...
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Most used parts of Boost [closed]

When I discovered boost::lexical_cast I thought to myself "why didn't I know about this sooner!" - I hated having to write code like ...
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How to add new column to MYSQL table?

I am trying to add a new column to my MYSQL table using PHP. I am unsure how to alter my table so that the new column is created. In my assessment table I have: ...
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MongoDB: Combine data from multiple collections into one..how?

... together by using the "reduce" out option in MongoDB 1.8+ map/reduce (see http://www.mongodb.org/display/DOCS/MapReduce#MapReduce-Outputoptions). You need to have some key in both collections that you can use as an _id. For example, let's say you have a users collection and a comments collection ...
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Percentage width child element in absolutely positioned parent on Internet Explorer 7

I have an absolutely positioned div containing several children, one of which is a relatively positioned div . When I use a percentage-based width on the child div , it collapses to 0 width on IE7, but not on Firefox or Safari. ...
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Representing graphs (data structure) in Python

...hey implemented their algorithms. You can also add additional algorithms. https://github.com/networkx/networkx/tree/master/networkx/algorithms share | improve this answer | ...
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How to dismiss keyboard iOS programmatically when pressing return

I created a UITextField programmatically making the UITextField a property of the viewController. I need to dismiss the keyboard with the return and the touch on the screen. I was able to get the screen touch to dismiss, but pressing return is not working. ...
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last day of month calculation

I am having issues with the calculation of when the next Last Day of the Month is for a notification which is scheduled to be sent. ...
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Updating a local repository with changes from a GitHub repository

I've got a project checked locally from GitHub, and that remote repository has since had changes made to it. What's the correct command to update my local copy with the latest changes? ...