Count Hacks Authors

gistfile1.txt

var authors = [], authorElements = document.querySelectorAll('td.column-coauthors a');
for (var i = 0; i < authorElements.length; ++i){
  var author = authorElements[i];
  if (authors.indexOf ( author.text ) === -1) {
    authors.push( author.text );
  }
};
alert(authors.length);