Find who has deleted more code than they've added; run on https://github.com/rails/rails/graphs/contributors or similar

deleters.js

$.makeArray($('.capped-card')).map(function(e) {
  return [$(e).find('.aname').text(), parseInt($(e).find('.a').text().replace(/,/g, ''), 10), parseInt($(e).find('.d').text().replace(/,/g, ''), 10)];
}).filter(function(a) {
  return a[2] > a[1];
}).map(function(a) {
  return [a[0], a[2] - a[1], a[2] / a[1]];
}).sort(function(a, b) {
  return b[1] - a[1];
}).map(function(a) {
  return a[0] + " removed " + a[1] + " lines (" + a[2].toFixed(2) + "x as many lines as they added)";
}).join("\n")