PCBR (Pairs Comparison Based Rating)

Making ratings is fun. After applying my method several times I've decided to gemify it.

Examples

See describe "examples" do in specs.

How it works

The first idea of rating items by one-to-one comparison was about QuakeLive players in 2013 or so and it didn't work well. At that time I was thinking about tree data structure. Later in May 2015 I've realised that it's really about dots in n-dimensional space and sectors. Applying it to Reddit RSS made my feed 50% more interesting.

TODO: describe/illustrate algorithm?

~~At the moment it's a "proof of concept" -- it needs huge optimisations for lookups, maybe using trees.~~

It worked fine in production for a project with huge computations where you can't find the best solution but have to find anything good in adequate time. Traversing the tree using this with a vector of [leaf's quality, depth] made things better than depth-first search with lots of ueristics.

Installation

$ gem install pcbr

Testing with RSpec before contributing

rspec

rake spec