title: What's the difference between .substr(0,1) or .charAt(0)?
body: <p>We were wondering in this <a href="https://stackoverflow.com/questions/6579439/how-to-check-first-character-in-string-and-how-to-send-that-string-into-an-array">thread</a> if there was a real difference between the use of <code>.substr(0,1)</code> and the use of <code>.charAt(0)</code> when you want to get the first character (actually, it could apply to any case where you wan only one char).</p>
  
  <p>Is any of each faster than the other?</p>