<p>On SO 18 Joel mentioned an algorithm that would rank items based on their age and popularity and it's based on gravity.  Could someone post this? C# would be lovely, but really any language (well, I can't do LISP) would be fine.  </p>

[{'answer_id': 32399, 'author': 'Tall Jeff', 'author_id': 1553, 'author_profile': 'https://Stackoverflow.com/users/1553', 'pm_score': 5, 'selected': True, 'text': '<p>My understanding is that it is approximately the following from another <a href="https://stackoverflow.com/questions/24066/what-formula-should-be-used-to-determine-hot-questions">Jeff Atwood</a> post</p>\n\n<pre><code>t = (time of entry post) - (Dec 8, 2005)\nx = upvotes - downvotes\n\ny = {1 if x &gt; 0, 0 if x = 0, -1 if x &lt; 0)\nz = {1 if x &lt; 1, otherwise x}\n\nlog(z) + (y * t)/45000\n</code></pre>\n'}, {'answer_id': 306236, 'author': 'Abhishek Mishra', 'author_id': 8786, 'author_profile': 'https://Stackoverflow.com/users/8786', 'pm_score': 3, 'selected': False, 'text': '<p><a href="http://www.mt-soft.com.ar/wordpress/wp-content/plugins/wp-o-matic/cache/0ad4d_reddit_cf_algorithm.png">alt text http://www.mt-soft.com.ar/wordpress/wp-content/plugins/wp-o-matic/cache/0ad4d_reddit_cf_algorithm.png</a></p>\n'}]
['https://Stackoverflow.com/questions/32397', 'https://Stackoverflow.com', 'https://Stackoverflow.com/users/1942/']