Question

i tried to write this function: http://uggedal.com/reddit.cf.algorithm.png in javascript:

function getRating(t,u,d){

        var x = u-d;

        if(x > 0)
            y = 1
        else if(x == 0)
            y = 0
        else if(x < 0)
            y = -1

        var z = Math.max(1,Math.abs(x));

        return Math.log(z)/Math.log(10) + y*t/45000;

    }

t = time in seconds between the first post and this post passed to the function
u = upvotes
d = downvotes

console.log(getRating(50000, 25, 25)); //0

But it always returns zero. Did i miss something? Thanks

edit: updated

Answer 1

For the example input, the result is 0, so that’s correct. Does it return 0 also for other inputs?

One thing, according to the link, you should set

z = Math.max(1,Math.abs(x))