Extract first name out of string of full name

Get First Name

/*
* getFirstName extracts the first name out of a string of the full name.
* Examples (input -> result):
* 'Tim Berners-Lee' -> 'Tim'
* 'Berners-Lee, Tim' -> 'Tim'
* 'Tim' -> 'Tim'
* */
const getFirstName = names => {
  const reg = new RegExp('.*, ([a-zA-Z-]*)|([a-zA-Z-]*) .*', 'i');
  const result = reg.exec(names);
  return (Array.isArray(result) && result.length > 0) ? result[1] || result[2] : names;
};