Re: Basic algorithm for Reddit-like feed sorting?

The basic idea would be to "score" the items based on how old they are. Simple division of votes by age in days would be a reasonable start. (10 votes and 1 days, score is 10, 10 votes and 2 days score is 5, etc etc)

You will probably want to throw some form of weighting into the score though to get a nice curve (stays high for the first 5 days, then rapidly falls off unless its up voting exponentially increases).

Of course a record starting with 0 votes will never appear at the top no matter the age, so you might need a "base" score to give new items a chance... something like (votes + 100)/age

On Thu, Jul 5, 2012 at 5:25 PM, 42startups <hello@42startups.com> wrote:

If I have a feed of content each with a vote count. Any ideas on a basic sort mechanism to display this?

Like Reddit, I'd like:

* the content with the most votes to be toward the top

* but I also don't want old content to remain at the top (e.g. if only sorting by votes, the feed won't change often)

* but I also want to give new content some airtime toward the top (I don't want a separate 'new' page like Reddit does)

Here's what I'm working with:

$this->paginate = array(

'limit'=>30,

'order'=>array(

'Story.created'=>'desc',

'Story.votes'=>'desc'

));

Any ideas?

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