4 ms·
Ask HN: What's the Reddit voting algorithm?
I just started using Reddit recently for the first time (yes, I'm a slow learner) but I understand that your karma determines something about how much your vote counts for. I've noticed when I log out sometimes, my vote has not registered, maybe because I'm a new user. Has anyone figured out what rules they apply? I assume there's a particular karma threshold at which your votes count more, etc.
- mcav 18y agoThis isn't reddit. But both Reddit and HN are open-source, so you should be able to discover the algorithm. HN source is here at http://ycombinator.com/arc/arc2.tar http://ycombinator.com/arc/arc2.tar and Reddit's can be found at http://reddit.com/code/ http://reddit.com/code/ .
- minutes 18y agoCool. Thanks. I appreciate the links. Didn't mean to give the impression I don't know where I am. I realize I am not on Reddit currently - I don't hear the sound of wild dogs grinding their teeth.
- ojbyrne 18y agoReddit does say that their "anti-cheating/spam" code is not public. I suspect that's part of the voting algo.
- ekpyrotic 18y agoDo you mean the HN voting algorithm?
- minutes 18y agoThanks for checking - I edited my question to make it more clear hopefully. But, no, I meant Reddit. I just started using Reddit recently but the site scares me. I feel like I'm surrounded by a pack of feral dogs. Aside from that, the HN voting algorithm is pretty straighforward for a new user to figure out. Whereas on Reddit I never know whether the vote I see is the one that is actually registered for me. When I log out of my account I often see that my vote didn't "stick". I don't think that's a good policy on Reddit's part. Just let me know honestly that I'm not at the level yet where my vote can count like a more experienced member.
- _pius 18y agoThe Reddit ranking algorithm was/is this: http://redflavor.com/reddit.cf.algorithm.png http://redflavor.com/reddit.cf.algorithm.png And Hacker News's was/is this: http://news.ycombinator.com/item?id=231209 http://news.ycombinator.com/item?id=231209
- deleted 18y ago[deleted]
- deleted 18y ago[deleted]
- minutes 18y agoI imagine anti-gaming measures exist in Reddit which are not displayed on the image here or maybe they were introduced later.
- pg 18y agoI tweaked it recently, because the increase in users has caused a few stories to get massive numbers of votes, and these were staying on the frontpage too long. Now it's (p - 1)^.8 / (t + 2)^1.8 where p = points and t = age in hours
- csomar 18y agoyou can do better, if you count new users votes the half. Newbie may vote often, as they are new.