Get your followers score on GitHub!

github.js

// followers score = sum((1 + user.followers) / user.following) for user in your followers
// We believe a user is more valuable if he/she doesn't follow everyone he/she sees on GitHub.

function getFollowersScore(username) {
    var request = new XMLHttpRequest();
    request.open('get', 'https://api.github.com/users/' + username + '/followers', false);
    request.send(null);
    var result = 0;
    var followers = JSON.parse(request.response);
    var pending = followers.length;
    for (var follower of followers) (function (follower) {
    	var request = new XMLHttpRequest();
    	request.open('get', follower.url);
    	request.onload = function (e) {
    		follower.tag = true;
    		var user = JSON.parse(request.response);
    		result += (1 + user.followers) / user.following;	// assume everyone follows himself/herself
    		if (!--pending) console.log(result);
    	};
    	request.send(null);
    })(follower);
}