Log function that is used ing https://github.com/visionmedia/debug

index.js

//https://github.com/visionmedia/debug

function log() {
  // this hackery is required for IE8/9, where
  // the `console.log` function doesn't have 'apply'
  return 'object' === typeof console
    && console.log
    && Function.prototype.apply.call(console.log, console, arguments);
}