title: string.split("(?!^)") explanation
body: <p>I'm trying to split the characters of the String to a String array. I found the solution <a href="https://stackoverflow.com/questions/5235401/split-string-into-array-of-character-strings">here</a>.</p>
  
  <p>The solution is perfect, however I don't get how <code>.split("(?!^)")</code> worked. I'm familiar with the basics of <code>split()</code> method. Can someone provide an explanation?</p>