This script shows you how Facebook ranks all your friends

This is slightly incorrect, it's more how Facebook ranks for searching. Those numbers are for search bar ranking of objects (users,groups,etc) you recently and/or most interact with. You can check yourself by typing the first letter of any of those names and that name is probably the first selection in your Facebook search bar.

A better ranking would be to look at communication_rank and observation_rank in FQL (https://developers.facebook.com/docs/technical-guides/fql/)

SELECT uid2, communication_rank, observation_rank FROM friend WHERE uid1=me() ORDER BY communication_rank

Does anybody know if the ranking is bi-directional? Is the rank just calculated on your activity (e.g.: visiting a friends profile) or does it include the activity of your friends (e.g.: when a friend visits your profile)

I would be interested to see exactly where this script came from.

It seems approximately correct just based on the posts I generally see in my newsfeed, but is this just someone's guess as to how Facebook could be doing things?

I wrote a similar script with a word cloud visualization here: https://jacobwg.com/facebook-friends

It was fun...

Here is the id of this script for Backtick (http://www.backtick.io/): 7403858

Hmm weird, there are a lot of people fairly high up on the list that are not my friends, some have 1 mutual friend, most are total strangers...