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natew/reddit_rank.rb

Created October 16, 2012 06:23
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Reddit ranking algorithm in rails
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reddit_rank.rb
# Ranking algorithm
def set_rank
find_id = matching_id || id
shared_song = Song.find(find_id) if find_id
if shared_song
favs_count = shared_song.user_broadcasts_count
time_created = shared_song.created_at
else
favs_count = 1
time_created = created_at
end
favs = [Math.log(favs_count * 10), 0].max
time = (time_created - Time.new(2012)) / 100000
self.rank = favs + time
end
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