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What exactly is Arel in Rails 3.0?

I understand that it is a replacement for ActiveRecord and that it uses objects instead of queries. 4 Answers ...
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How do I embed a single file from a GitHub gist with the new gist interface?

The new GitHub Gist interface has one embed snippet for the entire gist which embeds all files in the gist. The old interface had embed code for each file in the gist. Anyone know if there's a trick to embed a single file? ...
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Bootstrap 3 offset on right not left

In regards to BS 3 if I wanted just a narrow column of content on the right I might use an offset class of 9 and a column of 3. ...
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Sorting data based on second column of a file

I have a file of two columns and n number of rows. 4 Answers 4 ...
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Creating an official github mirror

How do I create a github mirror for an external git repository, such that it appears as "real mirror", e.g., as in https://github.com/mirrors ? ...
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A gentle tutorial to Emacs/Swank/Paredit for Clojure

I am moving to Emacs to work on Clojure /Lisp. What is all the information I need to setup on Emacs to be able to do the following? ...
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Is there a way to give a specific file name when saving a file via cURL?

I am pulling files using curl in the mac OS X terminal and want to give them different names. Is there a way to specify a name, such as a "save as" function when using curl? ...
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Remove all the elements that occur in one list from another

Let's say I have two lists, l1 and l2 . I want to perform l1 - l2 , which returns all elements of l1 not in l2 . 7 ...
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How many concurrent AJAX (XmlHttpRequest) requests are allowed in popular browsers?

In Firefox 3, the answer is 6 per domain: as soon as a 7th XmlHttpRequest (on any tab) to the same domain is fired, it is queued until one of the other 6 finish. ...
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php: determine where function was called from

is there a way to find out, where a function in PHP was called from? example: 8 Answers ...