string_methods.js #1

function randomString(len) {
  len = len || 13;
  // Borrowed liberally from:
  // http://stackoverflow.com/a/1349426/3436
  //
  // (All licenses on StackOverflow are CC).
  var text = "";
  var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

  for( var idx=0; idx < len; idx++ )
    text += possible.charAt(Math.floor(Math.random() * possible.length));

  return text;
}

module.exports = {
  randomString: randomString
};