A quick program thrown together to run some stats on an export of Bugsnag errors.

hacked-together.js

var _ = require("./vendor/assets/javascripts/vendor/underscore.js");

var parts = [
  require("/Users/adunkman/Downloads/arc-response-2015 Apr 9 11-21-29.json"),
  require("/Users/adunkman/Downloads/arc-response-2015 Apr 9 11-23-02.json")
];

var complete = parts.reduce(function (a, b) { return a.concat(b); });

var reportBy = function (name, grouper) {
  var report = {}; 
  var groups = _.groupBy(complete, grouper);

  _.each(groups, function (errors, value) {
    var percent = Math.round(errors.length / complete.length * 100);
    report[value] = "" + errors.length + " (" + percent + "%)";
  });

  console.log(name + ": " + JSON.stringify(report, null, 2));
};


reportBy("Browser", function (error) {
  return error.meta_data.Device.browserName + " " + error.meta_data.Device.browserVersion;
});

reportBy("Last Event Target", function (error) {
  return error.meta_data["Last Event"].target;
});

reportBy("Last Event Type", function (error) {
  return error.meta_data["Last Event"].type;
});

var url = require("url");
reportBy("Timesheet View", function (error) {
  var parts = url.parse(error.meta_data.Request.url);
  var regex = /^(\/[^\/]+\/[^\/]+)/;
  var m;

  return (m = parts.pathname.match(regex)) ? m[1] + "*" : parts.pathname;
});